SIEMENS Switchboards Low Voltage Power Distribution Installation Guide
SIEMENS Switchboards Low Voltage Power Distribution

Switchboards

Maximum Flexibility
At Minimum Cost Whether the design is for a 240V AC, 400 ampere system; a 600V AC, 6000 ampere system; or something in between, Siemens switchboards should be considered. Every aspect of design has been aimed at improving layout convenience, reducing installation costs, and minimizing the impact and cost of system changes. These switchboards provide the rugged construction and service flexibility necessary in systems for industrial plants, hi-rise complexes, hospitals, and commercial buildings, and are built to UL 891 and NEMA

PB-2 standards.
SB1 Switchboards Siemens SB1 switchboards have been specifically designed for the shortest lead times and for applications where floor space is at a premium. The rear of all sections align so the switchboard can be installed against a wall. The SB1 contains front-connected main protective devices and through bus ratings up to 2000 amperes and 600 Volts AC.

SB2 Switchboards
Siemens SB2 switchboards have been designed to be able to incorporate additional features. SB2 switchboards can have extra depth behind the bussing in each distribution section, can be front and rear aligned and can handle up to 4000 amperes and 600 Volts AC. These switchboards may also include insulated case circuit breakers and density rated bussing.

SB3 Switchboards
Siemens SB3 switchboards are designed for custom options. Siemens SB3\
Switchboards

switchboards can incorporate busway and transformer connections, rear access, all custom utility metering provisions and many other options.

No matter your need, Siemens SB3 switchboards can provide a solution.

SB1 Switchboards 

Available Features Device Usage Device Type Ampere Rating Mounting
Individual or panel mounted mains Molded Case Circuit Breakers (MCCB) 400 – 1200 Panel
Individual or panel mounted branches Molded Case Circuit Breakers (MCCB) 400 – 2000 Individual
Thermal magnetic MCCBs2000A maximum main bus Main Vacu-Break Switches (VBS)Vacu-Break Switches (VBS) 400 – 600800 – 1200 PanelIndividual
Front accessible High Contact Pressure Switches (HCP) 400 – 1200 Individual
Rear aligned Bolted Pressure Switches (BPS) 800 – 1200 Individual
Standard utility metering position Molded Case Circuit Breakers (MCCB) 15 – 1200 Panel
Customer metering: digital and analog meters Molded Case Circuit Breakers (MCCB) 400 – 2000 Individual
65KAIC interruption rating65C Copper and Aluminum bussing Branch Vacu-Break Switches (VBS)Vacu-Break Switches (VBS) 30 – 600800 – 1200 PanelIndividual
Type 1 and 3R enclosures High Contact Pressure Switches (HCP) 400 – 1200 Individual
Integrated lighting panelboards Bolted Pressure Switches (BPS) 800 – 1200 Individual

SB2 Switchboards 

Available Features Device Usage Device Type Ampere Rating Mounting
All SB1 options4000A maximum main busElectronic trip unit (solid state) MCCBs Density rated copper and aluminum bussing 100KAIC interruption rating  Main All SB1 main devicesBolted Pressure Switches (BPS)WL Insulated Case Circuit Breakers (WL)  Up to 4000Up to 4000  Individual Individual
 Branch All SB1 branch devicesBolted Pressure Switches (BPS)WL Insulated Case Circuit Breakers (WL)  Up to 4000Up to 4000  Individual Individual

SB3 Switchboards 

Available Features Device Usage Device Type Ampere Rating Mounting
All SB1 and SB2 options 6000A maximum main bus 200KAIC interrupting rating Rear accessible Custom busway and transformer connections Additional special options and configurations  Main All SB1 and SB2 main devices Bolted Pressure Switches (BPS)WL Insulated Case Circuit Breakers (WL)  Up to 6000Up to 5000  Individual Individual
 Branch All SB1 and SB2 branch devices Bolted Pressure Switches (BPS)WL Insulated Case Circuit Breakers (WL)  Up to 6000Up to 5000  Individual Individual

Main Devices

 Switchboard Type Mounting Molded Case Circuit Breaker Fixed Vacu-Break Fusible Switch Fixed 1 HCPFusible Switch Fixed Bolted Pressure Fusible Switch Fixed  WL UL489 or UL1066Breaker
Individual Panel
SB1 Yes 400-2000A 800-1200A 400-1200A 800-2000A —
Yes 400-1200A 400-600A 400-1200A —
SB2 Yes 400-2000A 2 400-1200A 400-1200A 800-4000A 800-4000A 3
Yes 400-1200A 2 400-600A 400-1200A — —
SB3 Yes 400-2000A 2 400-1200A 400-1200A 800-6000A 4 800-5000A 5
Yes 400-1200A 2 400-600A 400-1200A — —

Branch Devices

 Switchboard Type Mounting Molded Case Circuit Breaker Fixed Vacu-Break Fusible Switch Fixed 6 HCPFusible Switch Fixed Bolted Pressure Fusible Switch Fixed  WL UL489 or UL1066Breaker
Individual Panel
SB1 Yes 15-1200A 30-600A 400-1200A — —
Yes 400-2000A 800-1200A — — —
SB2 Yes 400-2000A 2 800-1200A 400-1200A 800-4000A 800-4000A 3
Yes 15-1200A 2 30-600A 400-1200A — —
SB3 Yes 400-2000A 2 800-1200A 400-1200A 800-6000A 4 800-5000A 5
Yes 15-1200A 2 30-600A 400-1200A — —

Distribution Sections

 Switchboard Type   Access Dimensions in Inches (mm)
Height Width Depth
Std. Opt. Std. Opt. Std. Opt.
SB1 Front 90 (2286) — 32 (813) 38 or 46(965 or 1168) 20 (508) —
SB2 Front 90 (2286) — 32 (813) 38 or 46(965 or 1168) 20 (508) 7 28 or 38(711 or 965) 7
SB3 Front & Rear 90 (2286) 70 (1778) 32 (813) 38 or 46(965 or 1168) 20 (508) 7 8 28, 38, 48 or 58(711, 965, 1219or 1473)

Voltage Chart

SB1 SB2 SB3
• • • 208Y/120 3Ø4W AC
• • • 480Y/277 3Ø4W AC
• • • 240 3Ø3W Delta AC
• • • 480 3Ø3W Delta AC
• • • 600 3Ø3W Delta AC
• • • 347 3Ø3W Delta AC
• • • 240/120 3Ø4W Delta B phase High Leg
• • • 240/120 3Ø4W Delta C phase High Leg
• 120/240 2Ø5W Single Neutral AC
• 120/240 1Ø3W Ground Neutral
• 240 3Ø3W Grounded B Phase
• 120 1Ø2W Ground Neutral AC
• 240 1Ø2W No Neutral AC
• 125 1Ø2W Ground Neutral AC
• 125 2W DC
• 250 2W DC
• 500 2W DC
• • • 220Y/127 3Ø4W AC
• • • 380Y/220 3Ø4W AC
• • • 415Y/240 3Ø4W AC
• • • 440Y/250 3Ø4W AC
• • • 600Y/347 3Ø4W AC
• • • 230 3Ø3W Delta AC
• • • 380 3Ø3W Delta AC
  1. 1200A Vacu Break main devices are not available at voltages above 240.
  2. Includes Thermal Magnetic and Solid State Circuit Breakers (except for 2000A).
  3. Fixed mounted only.
  4. 5000 and 6000 amp BPS not UL Listed.
  5. Drawout or fixed mounted.
  6. Service disconnect 1200A Vacu-Break devices are not available at voltages above 240V. 1200A Vacu Break branch devices are available at all voltages when protected by a main device.
  7. Distribution section with two high 800 or 1200A Vacu-Break is 28 inches (711 mm) deep.
  8. Distribution section with two high WL breakers is 28 inches deep minimum and distribution section with two high bolted pressure switches is 38 inches deep minimum

Service Sections
Typical switchboards require one or more service main disconnects. The main disconnects are mounted into a Service Section and typically feed one or more distribution sections. In some applications, the main service disconnect is required to be located remote to distribution portion of the equipment and is considered a Remote Main. Service sections can be fed by a variety of means such as cable, busway, vault stubs, and transformers.

To provide additional room for top line cable routing where needed, pull box extensions are available in heights of 10, 15, 20, 25, 30 inches to mount on top of any standard service section.

When fed from underground, a separate pull section is usually added. The service section is then fed from the adjacent underground pull section.

All main disconnect devices equipped for bottom feed will accept cable directly from underground into the service section. Choose Bussed or

Non-Bussed Pull Sections

With Siemens switchboards, non-bussed pull section, or a bussed pull section for underground feed can be selected. The unique bussed section permits cable to be run straight from underground to the bus bars at the top of the section.

Non-bussed pull sections have openings for carrying the underground feed cables to the service section bus.

Bussed and non-bussed pull sections may be used with overhead services.

Service Sections House A Variety of Equipment

Utility Metering
In addition to the main disconnect, the service section usually contains utility metering provisions. “Hot” metering (current transformers on the line side of the main disconnect) is normal, but

“cold” metering provisions (current transformers on the load side of main disconnect) can also be furnished.

Whether hot or cold metering is required, the current transformers provided by the utility company will be mounted in a completely separate compartment. The compartment will be built to utility company standards, with hinged doors and provisions for metering equipment provided by the utility.

Customer Metering
The service section often provides space for many user instrument requirements. Either analog or digital metering can be mounted in the service section along with the main disconnect. A separate section would be needed only if a large instrument or an unusual number of instruments are required.

Main Disconnect Options
Provide Flexibility
Main protective devices can be mounted individually for quick access in an emergency. Siemens switchboards will accommodate a variety of main protective devices. Selection depends on the characteristics of your individual electrical system.

Disconnect Devices
Molded Case Circuit Breakers
(Thermal Magnetic) Molded case thermal magnetic circuit breakers are available 15-2000 amperes with interruption ratings up to 200,000 AIC. Interruption ratings are typically tested at 240V, 480V or 600V.

These breakers come with a wide array of accessories, including: shunt trip, motor operator, auxiliary switches, alarm switches as well as several others.

Solid-State
Solid state molded case circuit breakers are available in frame sizes from 150-1600 amperes and up to 600V AC. Each of these breakers has solid-state circuitry which assures minimal damage through the quick interruption control of fault currents. They allow for finite adjustment of short-time delay and ground fault and feature zone selective interlocking as well as MODBUS and PROFIBUS communication.

Fuseless Current Limiting
Current limiting molded case circuit breakers, 400-1600A, up to 1600V AC, with thermal-magnetic protection provide coordinated protection for branch devices and circuits where extremely high fault currents are available. Solid state current limiting molded case breakers are also available in ratings of 400-1200 ampere

WL UL489 Insulated Case Circuit
Breakers and WL UL1066 Power

Circuit Breakers

Insulated case circuit breakers, 800-5000 amperes, 600V ac, with solid-state trip devices, offer stored-energy tripping plus optional ground fault protection, selective tripping and a broad range of accessories.

All main protective devices, except Vacu-Break fusible switches, can be equipped with ground fault relays to comply with the National Electrical Code (Section 230.95) ground fault protection requirements

Fusible Switches
Vacu-Break Switches (VBS), 400-1200 amperes, and High Contact Pressure (HCP), 400-1200 amperes, 600V ac, provide protection, coordination with branch protective fusible switches, and application flexibility in systems where high available fault currents are encountered.

Bolted Pressure Switches
Bolted Pressure Switches (BPS), 800-6000 amperes, 480V ac, combine econ omy with extremely high interrupting capacity in conjunction with Class L fuses. Options include shunt trip, ground fault relaying, and a wide range of other accessories.

Distribution Sections For
Expanded Wiring Room And
Exceptional Accessibility Generous top and bottom gutters have been created by locating through-bus in the rear center of the distribution section. In cable entrance sections, no obstructions are less than 8 inches above the floor, and no live bus bars are located less than 10 inches off the floor. So there is plenty of room to run cables into the distribution section to make connections. Standard bolted gutter covers give complete access to load conductors.

Hinged gutter covers can be furnished where quick access to load connectors is desired.

Heavy channels form a rigid ring at the base and top of each section, and heavy gauge structural members are used for the vertical corner posts so there is no encroachment of additional bracing into the top and bottom gutter areas.

To provide additional room for top load cable routing where needed, pull box extensions are available in heights of 10, 15, 20, 25, and 30 inches to mount on top of any standard distribution section.

Top plates on all sections are easily removed in the field for drilling, punching, and cutting conduit entry holes.

Distribution Sections Designed With The Future In Mind
Because all distribution sections can accommodate any combination of panel-mounted branch devices, including molded case circuit breakers, Vacu-Break fusible switches, HCP fusible switches and motor starters, future system modifications are easier to handle without adding switchboard sections.

To make additional distribution sections easier to install when they are necessary, the through-bus in each distribution section is extended, and the end is predrilled to accept splice plate bolts. To add a section to an existing switchboard, set the new section flush against the side of the existing distribution section, secure frames and bolt together the bus bar splice plates.

Operating Temperature in Accordance With UL Standard 891 All distribution sections contain louvers at both the top and bottom to assure cool operation.

Motor Starter Switchboards Combine
Power Distribution And Motor Control
Siemens switchboards offer a complete line of group-mounted starters that provide a compact and convenient method of combining power distribution and control circuits in one location

Motor starter units are available with fully bussed circuit breaker or fusible Vacu-Break units, factory-wired on the load side to full voltage, non-reversing starters to reduce installation time.

Distribution Sections Take
Any Type Of Protective Device
Distribution sections of switchboards can accept any combination of molded case circuit breakers and fusible switches. If the system calls for a mixture of these devices, there is the option of grouping the devices in logical patterns within a single section. A separate section is not needed for each type of device. And because all types of devices can be put in a single section, the total number of sections required in the system can be reduced.

Future modifications are easier, too.
Devices can be added or changed as the system grows and changes. If a motor starter has to be added after the installation, an entire switchboard section need not be provided to house it. It can be installed in any distribution section with available unit space.

Modular, Bolted-Frame
Construction Saves Labor Modular construction of all service and distribution sections allows the switchboard to be designed into the building. Switchboards can even be designed to be continued around corners or mounted back to end or to ensure the switchboard fits in the electrical room. Rigid, bolted frames can be shipped individually and moved into the building in sections that are easy to maneuver without special equipment, then quickly assembled in place with minimal labor.

Even the front, back and side covers are light, easy-to-handle, formed steel pieces that fit flush to the cabinet sides. No heavy, unwieldy flat plate must be removed to gain interior access. Bus Location Permits Quick and Easy

Installation and Maintenance
All through-bus to adjoining sections are located in the rear center of distribution section. This design provides large, unobstructed wiring gutters at the top and bottom of each section. Wiring takes less time, costs less to install, and is easier to service.

Front View 
Front View

Rear View
Rear View

Contents hide
1 More Labor Saving Design Features
2 Testing
3 Pictorial Index
4 Switchboards
5 Utility Metering
6 Service Sections
7 Service Sections
8 Combination Sections
9 Auxiliary Entrance Sections
10 Distribution Sections
11 Specialty Connections
12 Outdoor Enclosures
13 General Application Data
14 General Application Data
15 Metering
16 Interrupting Capacity Ratings
17 Surge Protective Devices
18 Ground Fault Protection
19 Some Things To Consider
20 Documents / Resources
20.1 References
21 Related Posts

More Labor Saving Design Features

Switchboards Suit A Wide Range Of Applications Siemens switchboards will accommodate systems up to 6000 amperes, 600V AC maximum in all system configurations.

Distribution system vertical bus can be specified for 400-3000 ampere ratings, and branch circuit provisions allow intermixing any combination of:

  • – 15-1200 ampere molded case circuit breakers
  • 30-600 ampere Vacu-Break fusible switches for branch protection
  • 400-1200 ampere HCP fusible switches
  • Sizes 0 to 4 motor starters

All components can be built into standard Type 1 indoor enclosures, or into optional Type 3R outdoor construction. Bus Bars Carefully Designed to Complement Switchboard Function

Bus bars are available in standard tin-finished aluminum or optional silver-finished copper. Standard bus is sized on the basis of heat rise criteria, in accordance with the UL 891. All bus bars are sized to limit heat rise to 65ºC above an ambient temperature of 40ºC.

As an option, conductor material can be sized according to density limits, based on bus material. The applicable limits are: Copper – 1000 amperes/sq. in. Aluminum – 750 amperes/sq. in.

Tapered-capacity through-bus is standard in all switchboards in accordance with NEMA PB2 and UL891 standards. In compliance with these standards, at each distribution section, the through bus capacity is reduced as load is taken off. The through-bus is tapered to a minimum of one-third the ampacity of the incoming service mains.

Splice Plates Are Accessible From
The Front
All splice plates can be accessed, bolted and unbolted from the front of the switchboard to make connections of adjacent sections easy. Each splice plate is attached with a 1/2 inch bolt and a 2-inch or 3-inch belville washer on each end. This reduces installation time while increasing contact pressure at the joint.

To make installation and servicing of the splice plates easier, all phase and neutral through-busses are stacked one above the other.
Splice Plates

Splice Plates 

Cable Terminal

Cable Terminal 

Disconnect Links Included In Service
Entrance Equipment In switchboard service sections to be used as service equipment on 1 phase 3 wire and 3 phase 4 wire systems, provisions must be included to isolate the neutral bus from the grounded service neutral. This removable link gives you the ability to check branch neutral continuity on the load side of the main disconnect.

To maintain a service ground to the switchboard frame while the link is removed, a bonding strap is connected from the switchboard frame to the neutral bus on the line of the removable link.

UL and “SUSE” (suitable for use as service entrance equipment) labels will be furnished on service sections specified for service entrance.

Two Types Of Cable Terminals
Are Available
Screw mechanical connectors (lugs) are provided as standard equipment on all devices. However, compression connectors are available as an option on all main lugs, main bolted pressure switches, main power circuit breakers, and main insulated case circuit breakers.

Testing

Provides Production Checks And Design Verification 

Testing conducted includes both production testing of switchboard sections for compliance with UL requirements, design verification tests, and quality control testing.

Production Test Check
Structural Integrity Production tests are performed on all switchboard sections in accordance with UL procedures. A test voltage equal to twice the rated voltage plus 1000 volts (Vt = 2Vr +1000) is applied for one minute to each switchboard section to check the integrity of the conductor and insulator materials, and the switchboard assembly. These tests are performed routinely to verify proper equipment fabrication and assembly. Design Verification And Development Tests Proved  A Variety Of Data

For more sophisticated design verification and developmental testing, a separate laboratory is used. This test lab is fully instrumented for advanced, multi-phase electrical test work over a wide range of system conditions.

Among the tasks performed is the determination of heat rise at bus duct connections, and at protective device terminations on both the line and load side.

All heat rise tests are conducted in strict accordance with applicable UL standards. Heat rise data from the tests are carefully compared to UL allowable heat rise levels.

Another important program conducted in the laboratory is the systematic verification of short circuit withstand capabilities for all switchboard conductor materials. Switchboard bus has been thoroughly tested and is UL Short Circuit Withstand Rated (UL File #E22578). Switchboard sections with design conforming to test specifications will carry a label noting the Short Circuit Current Withstand rating applicable to that section.

Standard Lugs 1

 Rating  Range  Wires Per Barrel Quantity Barrels By Ampere
400A Std. 3/0 – 500 (2) 3/0 – 250 kcmil or (1) 3/0 – 500 kcmil 1
400A Alt. 3/0 – 750 (2) 3/0 – 250 kcmil or (1) 3/0 – 750 kcmil 1
600A Std. 3/0 – 500 (2) 3/0 – 400 kcmil or (1) 3/0 – 500 kcmil 2
600A Alt. 3/0 – 750 (2) 3/0 – 400 kcmil or (1) 3/0 – 750 kcmil 2
800A Std. 3/0 – 500 (2) 3/0 – 400 kcmil or (1) 3/0 – 500 kcmil 3
800A Alt. 3/0 – 750 (2) 3/0 – 400 kcmil or (1) 3/0 – 750 kcmil 3
1200A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 4
1200A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 4
1600A Std.2000A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 67
1600A Alt.2000A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 56
2500A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 9
2500A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 7
3000A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 10
3000A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 8
4000A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 13
4000A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 11
5000A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 17
5000A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 13
6000A Std. 3/0 – 500 (1) 3/0 – 500 kcmil 20
6000A Alt. 3/0 – 750 (1) 3/0 – 750 kcmil 16

Connector and Wire Space Requirements Based on UL 891 and NEC

Ampere Rating of Mains or Feeders  Cable Size in kcmilBased on 75º C Aluminum Cable (Par.)
250 300 350 400 500 750
225 2 1 — — — —
400 2 2 2 2 2 2
600 3 3 3 3 2 2
800 4 4 4 3 3 3
1000 5 5 4 4 4 3
1200 6 6 5 5 4 4
1600 8 7 7 6 6 5
2000 10 9 8 8 7 6
2500 12 11 10 10 9 7
3000 15 14 12 12 10 8
4000 20 18 16 15 13 11
Amp. RatingPer Single Cable  205  230  250  270  310  385

1 Lug quantity based on 75ºC cable from NEC Table 310.16.

Pictorial Index

For Quick Layout and Dimensional Information

Service Section with Utility Current Transformer Compartment and Multi-Service Disconnects
Pictorial Index

Utility Current Transformer Compartment, Main Disconnect and Distribution Sections
Pictorial Index

Customer Metering, Main Disconnect and Distribution Sections
Pictorial Index

Combination Main Service Disconnect and Distribution Section
Pictorial Index

  1. For Multi-Main Service with EUSERC Metering, see page 16.
  2. For Multi-Main Service Section with Other Utility Metering, see page 16. Unit Space for Disconnect Devices:
  3. Molded Case Circuit Breakers, see page 28. Vacu-Break Switches, see page 28.
  4. For Service Section with EUSERC Metering, see page 19.
  5. For Service Section with Other Utility Metering, see page 17.
  6. For Service Section with CustomerMetering, see page 20.
  7. For Distribution Section, see pages 26-32.
  8. For Combination Service Disconnect and Distribution Section, see pages 21-25.
  9. For Bussed and Non-Bussed Pull Sections, see pages 26-27.
  10. For Enclosed Device with Customer Metering, see page 20.
  11. For Enclosed Device with Utility Metering, see pages 18 and 19.

Enclosed Device Remote Main With Either Customer Metering or Utility Metering
Pictorial Index

Pictorial Index

Switchboards

Standard Current Transformer Compartments 

Standard Utility Metering Compartments
Service entrance switchboards often require that a utility current transformer compartment be included. The National Electrical Manufacturer’s Association (NEMA) has created a section covering utility current transformer compartments for inclusion in PB-2, the existing standard for switchboards.

Siemens current transformer compartments have been designed to conform to this standard. All specific utility requirements take precedence but in the absence of any special requirements, the standard will be used.

Hot sequence metering has the current transformer compartment on line side of main device and cold sequence metering has the current transformer compartment on load side.

PB-2 5.06 Utility Transformer Compartment
Switchboard assemblies containing current transformer compartments for utility metering shall be arranged as shown in Figures 1 through 4. All indicated dimensions are minimum except the mounting for the current transformer. Mounting shall be for either bar or window type transformers.

The front of the compartment shall be accessible through a sealable hinged, single or double door or removable cover.

Barriers shall be installed as required to prevent access through other than sealable doors or covers.

EUSERC Member Utilities
For all cases where incoming service is from below, underground pull sections are required.

For EUSERC member utilities, underground pull sections require non-bussed sections for 400 ampere, lug landings for 600 and 800 ampere and bussed pull sections above 800 ampere.

Non-Standard SB3 Utilities
For utilities that are non-Standard and are not EUSERC member, non bussed or bussed pull sections are required in order to meet the local utility and code requirements. Any non-standard utility is a type SB3 switchboard.
Transformer Compartments
Transformer Compartments
Transformer Compartments

NEMA Standard Only 

Ampere Rating Fig. CompartmentDimensions In Inches (mm)  Bus Drilling Figure  Dimensions In Inches (mm)
H W D A B C F G
400–800 1 30 38 20 3 10.00 9.00 6.44 7.50 10.50
(762) (965) (508) (254) (229) (164) (191) (267)
400–800 2 30 38 28 3 10.00 9.00 10.88 7.50 17.50
(762) (965) (711) (254) (229) (276) (191) (445)
1200–2000 2 30 38 28 4 7.50 11.50 6.02 9.00 17.50
(762) (965) (711) (191) (292) (153) (229) (445)
1200–2000 2 30 38 38 4 7.50 11.50 6.82 9.00 19.00
(762) (965) (965) (191) (292) (173) (229) (483)
2500 2 30 38 38 4 7.50 11.50 7.07 9.00 19.00
(762) (965) (965) (191) (292) (180) (229) (483)
3000–4000 2 30 38 38 4 7.50 11.50 7.07 9.00 19.00
(762) (965) (965) (191) (292) (180) (229) (483)

Notes:
The utility current transformer compartments may be in the upper or lower portion of the Service Section. Neutral may be located to the rear alongside ØA or ØC; — alternate rear location between ØA and ØB, or ØB and ØC. All dimensions are shown in inches and mm. The neutral need not be located in the current transformer compartment, provided its location complies with 2002 NEC article 300.20, and with UL as they relate to induced currents. Quantity and size of aluminum and copper bus per UL 891, or manufacturers’ UL Listed sizes, based on temperature rise. Barrier material and thickness per UL 891. This standard is intended for current transformers built to ANSI C12.11-1978.

Utility Metering

Electric Utility Company ED&CUtility Code 480V 240V SB1 SB2 SB3
Hot Cold Hot Cold
Alameda Bureau of Electricity EUSERC X X X X X
Anaheim Public Utilities Department EUSERC X X X X X
Anderson Municipal, IN AM X X X
Anoka Electric Co., MN AN X X X
Appalachian Power Co., VA (NEMA) AP X X X X X
Arizona Public Service Company EUSERC X X X X X
Atlantic Electric, NJ AE X X X X X
Austin Electric Dept., TX AU X X X
Azusa Light and Water Department EUSERC X X X X X
Baltimore Gas & Electric, MD BG X X X X X
Bangor Hydro-Electric Co., ME BH X X X
Banning Electric Department EUSERC X X X X X
Belmont Municipal, MA BM X X X
Benton County Public Utility District No. 1 EUSERC X X X X X
Benton Rural Electric Association EUSERC X X X X X
Blackstone Valley Elect. Co., RI BV X X X
Boston Edison Co., MA BE X X X X X
Braintree Elect., Light Co., MA BL X X X
Burbank Public Service Department EUSERC X X X X X
Burlington Elect., Lighting Dept., VT BD X X X
Callum County Public Utility District CP X X X X X
Cambridge Electric Co., MA CA X X X X X
Central Colorado Pwr./Centel Corp., CO CX X X X
Central Hudson Gas & Electric, NY CH X X X X X
Central Illinois Light Co., IL CT X X X
Central Illinois Public Service, IL CV X X X
Central Maine Power Co., ME CM X X X X X
Central Vermont Public Service Corp., VT CR X X X X X
Chelan County Public Utility District EUSERC X X X X X
Chicopee Light & Power, MA CL X X X
Cincinnati Gas & Electric, OH CG X X X X X
Citizens Utility Company Kauat Electric Division EUSERC X X X X X
Clark County Public Utility District EUSERC X X X X X
Cleveland Electric Illuminating Co., OH CC X X X
Colorado Springs X X X X X
Colorado Springs Dept. of Utilities, CO EUSERC X X X X X
Columbus Div. of Electric, OH CY X X X
Columbus Southern Power, OH CU X X X
Commonwealth Edison Co., IL CE X X X X X
Commonwealth Electric, MA CW X X X X X
Concord Electric Co., NH CO X X X
Connecticut Light & Power Co., CT CN X X X X X
Consolidated Edison Co., NY (298-377) CS X X X X X
Consumers Power of Michigan, MI CF X X X
Coos-Curry Electric Cooperative EUSERC X X X X X
CP National Corporation EUSERC X X X X X
Cornbelt Electric Co-Op., IL CB X X X
Danvers Elect., Div., MA DC X X X
Dayton Power & Light Co., OH DP X X X X X
Delaware Power & Light Co., DE DL X X X
Delmarva Power & Light, DE DM X X X
Des Moines District X X X
Detroit Edison Co., MI DE X X X X X
Dover, DE CD X X X
Duquesne Light Co., PA DU X X X

 

Electric Utility Company ED&CUtility Code 480V 240V SB1 SB2 SB3
Hot Cold Hot Cold
East Central Electric, MN EC X X X
Eastern Edison Co., MA EE X X X
Eugene Water and Electric Board X X X X X
Exeter & Hampton Electric Co., NH EH X X X X X
Florida Power and Light (NEMA) X X X
Franklin County Public Utility District EUSERC X X X X X
Freeport Electric Dept., NY FE X X X
Georgia Power Co., GA (NEMA) GP X X X X X
Glendale Public Service Department EUSERC X X X X X
Granite State, NH (NEMA) GS X X X X X
Grant County Public Utilities District EUSERC X X X X X
Gray’s Harbor County District No. 1 EUSERC X X X X X
Green Mountain Power Co., VT (NEMA) GM X X X X X
Greenport Electric Dept., NY GL X X X
Gulf State Utilities Co., TX GE X X X X X
Hampton Power and Light (NEMA) X X X X X
Hancock Co., Rural Electric Corp., IA HC X X X
Hawaii Electric Company EUSERC X X X X X
Hawaii Electric Light Company EUSERC X X X X X
Heraldsburg Electric EUSERC X X X X X
Idaho Power EUSERC X X X X X
Idaho Power Company EUSERC X X X X X
Illinois Power Co., IL IC X X X X X
Imperial Irrigation District EUSERC X X X X X
Indiana & Michigan Electric Co., IN IM X X X
Indianapolis Power & Light, IN IP X X X X X
Interstate Power Co., IA IN X X X
Iowa Illinois Gas & Electric, IA IL X X X
Iowa Public Service, IA IS X X X X X
Iowa Southern Utilities Co., IA IU X X X
Jacksonville Electric Authority, FL (NEMA) JE X X X X X
Jersey Central Power & Light, NJ JC X X X
Kansas City Power & Light Co., MO KC X X X X X
Kansas Gas & Electric Co., KS KG X X X
Kansas Power & Light, KS (NEMA) KL X X X
Kentucky Power, KY (NEMA) KP X X X
Kentucky Utilities, KY (NEMA) KU X X X
Klickitat Company Public Utility District EUSERC X X X X X
Lake Superior District Power Co., MN LS X X X
Lassen Municipal Utility District EUSERC X X X X X
Laverne Municipal Electric Plant, OK LM X X X
Lincoln Electric System, NE LC X X X
Lodi EUSERC X X X X X
Lompoc EUSERC X X X X X
Long Island Lighting Co., NY LI X X X
Los Angeles Department of Water and Power EUSERC X X X X X
Louisville Gas & Electric Co., KY LG X X X X X
Lubec Water & Electric District, ME LL X X X
Madison Gas & Electric Co., WI MG X X X
Maine Public Service Co., ME MP X X X
Mason County Public Utility District EUSERC X X X X X
Massachusetts Electric Co., MA (NEMA) MC X X X X X X X
Maui Electric Company EUSERC X X X X X
McMinnville Water and Light EUSERC X X X X X
Mesa Electric EUSERC X X X X X

 

Electric Utility Company ED&CUtility Code 480V 240V SB1 SB2 SB3
Hot Cold Hot Cold
Metropolitan Edison Co., PA ME X X X X X
MidAmerica Energy X X X X X
Midwest Power Co., IA MI X X X
Minnesota Power & Light Co., MN ML X X X
Mississippi Power & Light, MS MS X X X
Modesto Irrigation Distict EUSERC X X X X X
Monongahela Power Co., WV MO X X X
Montana Dakota Utilities, MT/ND/SD MD X X X
Montana Power and Light EUSERC X X X X X
Montana Power Company EUSERC X X X X X
Muscatine Power & Water, IA MW X X X
Narragansett Electrical Co., RI NE X X X X X
Navopacheelectric Cooperative Incorporated EUSERC X X X X X
NEMA X X X X X
Nevada Electric X X X X X
Nevada Power Company Incorporated EUSERC X X X X X
New England Power X X X X X
New Orleans Public Service, LA NO X X X X X
Newport Electric Corp., RI NC X X X
New York State Electric & Gas Corp., NY NY X X X X X
Niagara Mohawk Corp., NY NM X X X
Northern Indiana Public Service, IN NI X X X
Northern States Power Co., MN/WI/ND/SD NS X X X X X
NorthEast Utility X X X X X
Northwestern Public Service, SD NP X X X
Norwich Dept. of Public Utilities, CT ND X X X
Norwood Municipal Light Co., MA NL X X X
Ohio Edison Co., OH OE X X X
Ohio Power Co., OH OP X X X
Omaha Public Power District, NE OM X X X X X
Orange & Rockland Utilities, NY OR X X X X X
Otter Tail Power Co., MN OT X X X
Pacific Gas and Electric EUSERC X X X X X
Pacific Power and Light Company EUSERC X X X X X
Palo Alto Water and Power Department EUSERC X X X X X
Parker Municipal Light Dept., SD PM X X X
Pasadena Water and Power Department EUSERC X X X X X
Penn Electric X X X X X
Peninsular Light Company EUSERC X X X X X
Pennsylvania Electric Co., PA PE X X X
Pennsylvania Power Co., PA PY X X X
Pennsylvania Power & Light Co., PA PL X X X
Philadelphia Electric Co., PA PH X X X X X
Plumas-Sierra Rural Electric Company EUSERC X X X X X
Port Angles City Light EUSERC X X X X X
Portland General Electric EUSERC X X X X X
Potomac Edison Co., MD PT X X X X X
Potomac Electric Power Co., DC PP X X X
Public Service Electric & Gas Co., NJ PS X X X X X
Public Service of Colorado, CO PC X X X X X
Public Service of Indiana, IN PI X X X
Public Service of New Hampshire, NH PU X X X X X
Puget Sound Power and Light EUSERC X X X X X
Redding Electric Utility EUSERC X X X X X
Richland EUSERC X X X X X

 

Electric Utility Company ED&CUtility Code 480V 240V SB1 SB2 SB3
Hot Cold Hot Cold
Riverside Public Utility EUSERC X X X X X
Rochester Gas & Electric Co., NY RG X X X
Rockland Electric X X X
Rockville Centre Electric Dept., NY RE X X X
Roseville Electric Department EUSERC X X X X X
Sacramento Municipal Utility District EUSERC X X X X X
Salem Electric EUSERC X X X X X
Salt River Project EUSERC X X X X X
San Diego Gas and Electric EUSERC X X X X X
Santa Clara Electric Department EUSERC X X X X X
Seattle Washington EUSERC X X X X X
Sierra Pacific Power Company EUSERC X X X X X
Snohomish County Public Utility District No. 1 EUSERC X X X X X
Southern California Edison Company EUSERC X X X X X
Southern California Water Company EUSERC X X X X X
South Central Elec. Association, MN SC X X X
South Hadley Electric Light Dept., MA SH X X X
South Norwalk Electric, CT SN X X X
Southern Indiana Gas & Electric, IN SI X X X
Southern Maryland Co-Op, MD SM X X X
SpringField Utility Board EUSERC X X X X X
St. Louis Municipal Electric, MI SL X X X
Sulpher Springs Valley Electric Corporation EUSERC X X X X X
Superior Water Light & Power, MN SW X X X
Tacoma EUSERC X X X X X
Tallahassee Electric (NEMA) X X X X X
Trico Electric Cooperative EUSERC X X X X X
Truckee Donner Public Utility District EUSERC X X X X X
Tucson Electric Power Company EUSERC X X X X X
Turlock Irrigation District EUSERC X X X X X
Toledo Edison, OH TE X X X
Ukia EUSERC X X X X X
Union Electric of St. Louis, MO UE X X X X X
Union Light Heat & Power Co., KY UL X X X
United Illuminating Co., CT UI X X X X X
Utah Power and Light EUSERC X X X X X
Vermont Public Service, VT VP X X X
Vernon Water & Electric EUSERC X X X X X
Village of Hamilton, NY VH X X X
Vineland, NJ CI X X X
Virginia Electric Power Co., VA VE X X X
Wakefield Municipal, MA WM X X X
Washing Water and Power EUSERC X X X X X
Watertown Municipal, NY WA X X X
Watertown Municipal Utilities, SD WU X X X
Wellesley Dept. of Public Works, MA WY X X X
WestField Gas and Electric X X X X X
West Penn Power Co., PA WP X X X
Western Area Power Administration EUSERC X X X X X
Western Gas and Electric X X X
Western Massachusetts Electric Co., MA WT X X X X X
Westerville Electric Co., OH WR X X X
Wheatland Electric Co-Op., KS WC X X X
Wisconsin Electric Power Co., WI WE X X X X X
Wisconsin Power & Light Co., WI WL X X X
Wisconsin Public Service, WI WS X X X

Service Sections

Utility Metering With Multiple Disconnects

Transformer Compartments

Standard Utility Metering

   Ampere Rating (MLO) Dimensions in Inches (mm)
Height Width Depth – Minimum — Letters Refer To Chart Below
All Types H1 Pull Box H2  Unit Space Minimum All Types W1 All Types W2  D1 D2
Bussed Pull Section Distribution Section
H3 2 H4 2 SB1 SB2 SB3 SB1 SB2 SB3 SB1 SB2 SB3
400    90(2286)    15(381)    30(762)    65(1651)    38(965)    32 or 38(813 or965) A C E A C E A C E
600 A C E A C E A C E
800 A C E A C E A C E
1000 B D F B D F A C E
1200 B D F B D F A C E
1600 B D F B D F A C E
2000 B D F B D F A C E

EUSERC Utility Metering 7

   Ampere Rating (MLO) Dimensions in Inches (mm)
Height Width Depth – Minimum — Letters Refer To Chart Below
 All Types H1  Pull Box H2  Unit Space  Minimum All Types W1  All Types W2  D1 D2
Bussed Pull Section Distribution Section
H3 2 H4 2 SB1 SB2 SB3 SB1 SB2 SB3 SB1 SB2 SB3
400    90(2286)   8    30 (762)2     65 (1651)2  32 or 38(813 or965)    32 or 38(813 or965) A C E A C E A C E
600 A C E A C E A C E
800 A C E A C E A C E
1000 A C E A C E A C E
1200  20 (508)  38 (965) — — F B D F A C E
1600 — — F B D F A C E
2000 — — F B D F A C E
  1. Verify dimensions with local utility requirements.
  2. See page 27 for unit space of disconnect devices.
  3.  See page 25 for dimensions.
    EUSERC Utility Notes:
  4. Not applicable for EUSERC.
  5. Custom busway connections are available for SB3
    type switchboards only.
  6. Not allowed by Los Angeles Department of Water
    and Power or San Diego Gas & Electric.
  7. Some jurisdictions do not allow multi-main
    service equipment.
  8. 400/1000A FED by 500 kcmil – no pull box required.
    400/1000A FED by 750 kcmil – 10 inch (254mm)
    pull box required.
Depth Reference Chart
A 20 inches (508 mm) D 28, 38 (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)

Service Sections

Utility Metering With Single Main Disconnect
(Hot Sequence – Utility Compartment on Line Side of Main)

Max. Amp.Rating Device Type Device Family Device Applies To Switchboard Dimensions in Inches (mm)
Pull Box Width Depth Available (D) Letters Reference Below
SB1 SB2 SB3 H1 H2 H3 W SB1 SB2 SB3
Molded Case Circuit Breakers
400 JXD6, HJXD6, HHJXD6 JD6, HJD6, HHJD6 Sentron • • • 90(2286) 2 2 38(965) A C E
NJ, HJ, LJ 9 VL • • — C E
SJD6, SHJD6 Sentron • • — C E
CJD6, SCJD6 Sentron • — — E
600 LXD6, HLXD6, HHLXD6 LD6, HLD6, HHLD6 Sentron • • • A C E
NL, HL, LL 9 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLD6 Sentron • — — E
800 NM, HM, LM VL • • • 10 3(254) 4 A C E
MXD6, HMXD6 MD6, HMD69 Sentron • • • A C E
NM, HM, LM VL • • — C E
SMD6. SHMD6 Sentron • • — C E
CMD6, SCMD6 Sentron • — — E
1200 NN, HN, LN VL • • • B D F
NXD6, HNXD6 ND6, HND69 Sentron • • • B D F
NN, HN, LN VL • • — D F
SND6, SHND6 Sentron • • — D F
CND6, SCHD6 Sentron • — — F
16005 NP, HP, LP VL • • • 108(254) B D F
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D F
NP, HP, LP 9 VL • • — D F
SPD6 Sentron • • — D F
CPD6, SCPD6 Sentron • — — F
20005 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D F
Insulated Case Circuit Breakers 7
800 WL Insulated Case Breaker • • 90(2286) 10 3(254) 4 38(965) — D F
1200 • • 10 8(254) — D F
16005 • • — D F
20005 • • — D F
25006 • • 20(508) — — G H
30006 • • — G H
40006 • • — G H
50006 • — — H
Fusible Switches
400 High Contact Pressure (HCP) • • • 90(2286) 2 2 38(965) A C E
600 • • • A C E
800 • • • 10 3(254) A C E
1200 • • • A C E
800 Vacu-Break (VBS) • • • — B D F
1200 • • • B D F
800 Bolted Pressure (BPS) • • • B D F
1200 • • • B D F
16005 • • • B D F
20005 • • • B D F
25006 • • 20(508) 46(1168) — D G
30006 • • — D G
40006 • • — D G
50006 • — — G
60006 • — — G

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) H 38, 48, 58 inches(965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm) J 48, 58 inches(1219, 1473 mm)

Service Sections

Multiple Disconnects
Service Sections

  1. 1 Refer to Page 26 for dimensions.
  2. Not required.
  3. 800A through 1000A with 500 kcmil – no pull box required. 800A with 750 kcmil – 10.0 inch (254mm)pull box required. 1200A through 2000A with 750 kcmil – 20.0 inch (508mm) pull box required.
  4. 10 Inch (245mm) high top mounted pull box required when outgoing cable size is greater than 500kcmil.
  5. Not Available as an Enclosed Device in bottom feed applications with hot sequence utility metering.
  6. Not Available as an Enclosed Device with Hot or Cold Sequence Utility Metering.
  7. For Type SB3, drawout WL breakers breakers are available as an option. Minimum depth SB3 – 38 inches (965mm).
  8. 20 inch (508mm) high top mounted pull box required when outgoing cable size is greater than 500kcmil.
  9. Custom busway connections are available for SB3 type switchboards only

Service Sections
Service Sections
Service Sections

  1. Refer to Page 26 for dimensions.
  2. Not required.
  3. 28 inch (711mm) minimum depth required for Enclosed Device sections.
  4. Not Available as an Enclosed Device in bottom feed applications with cold sequence utility metering.
  5. A bussed pull section is required to place a utility compartment in the same section as the device or the utility compartment must be installed in an adjacent section.
  6. For Type SB3, drawout WL breakers are available as an option. Minimum depth SB3 – 38 inches (965 mm).
  7. With 750 kcmil load connectors, top mounted pull box shall be 20 inches (508mm) high.
  8. 28 inch (711mm) minimum depth required in top feed applications.
  9. Solid state trip unit only
Max. Amp.Rating Device Type Device Family Device Applies To Switchboard Dimensions in Inches (mm)
Pull Box Width Depth Available (D) Letters Reference Below
SB1 SB2 SB3 H1 H2 H3 W SB1 SB2 SB3
Molded Case Circuit Breakers
400 JXD6, HJXD6, HHJXD6 JD6, HJD6, HHJD6 Sentron • • • 90(2286) 2 2 —

38(965)

 A3 C 3 E
NJ, HJ, LJ 9 VL • • — C 3 E
SJD6, SHJD6 Sentron • • — C 3 E
CJD6, SCJD6 Sentron • — — E
600 LXD6, HLXD6, HHLXD6 LD6, HLD6, HHLD6 Sentron • • • A3 C3 E
NL, HL, LL 9 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLD6 Sentron • — — E
800 NM, HM, LM VL • • • 15(381) A3 C3 E
MXD6, HMXD6 MD6, HMD6 Sentron • • • A3 C3 E
NM, HM, LM 9 VL • • — C3 E
SMD6. SHMD6 Sentron • • — C3 E
CMD6, SCMD6 Sentron • — — E
1200 NN, HN, LN VL • • • B D F
NXD6, HNXD6 ND6, HND69 Sentron • • • B D F
NN, HN, LN VL • • — D F
SND6, SHND6 Sentron • • — D F
CND6, SCHD6 Sentron • — — F
16004 NP, HP, LP VL • • • — B D F
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D F
NP, HP, LP 9 VL • • — D F
SPD6 Sentron • • — D F
CPD6, SCPD6 Sentron • — — F
20004 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D F
Insulated Case Circuit Breakers 6
800 WL Insulated Case Circuit Breaker • • 90(2286) 10(254) 15 7(381) 38(965) — D F
1200 • • 15(381) — — D F
16004 • • — D F
20004 • • — D F
250045 • • 20(508) — G H
300045 • • — G H
400045 • • — G H
500045 • — G H
Fusible Switches
400 High Contact Pressure (HCP) • • • 90(2286) 2 15 7(381) 38(965) A8 C 8 E8
600 • • • A8 C 8 E8
800 • • • 15 3(381) A8 C 8 E8
1200 • • • A8 C 8 E8
800 4 Vacu-Break (VBS) • • • — B D F
12004 • • • B D F
800 Bolted Pressure (BPS) • • • 15 7(381) B D F
1200 • • • B D F
1600 • • • 20 7(508) B D F
2000 • • • B D F
25004 • • — 46(1168) — D G
30004 • • 20(508) — D G
40004 • • — D G
50004 • — — G
60004 • — — G

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) H 38, 48, 58 inches(965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm) J 48, 58 inches(1219, 1473 mm)

 

Max. Amp.Rating Device Type Device Family Device Applies To Switchboard Dimensions in Inches (mm)
Pull Box Width Depth Available (D)Letters Reference Below
SB1 SB2 SB3 H1 H2 W SB1 SB2 SB3
Molded Case Circuit Breakers
400 JXD6, HJXD6, HHJXD6 JD6, HJD6, HHJD6 Sentron • • • 90(2286) 2 32 3(813) A C E
NJ, HJ, LJ 6 VL • • — C E
SJD6, SHJD6 Sentron • • — C E
CJD6, SCJD6 Sentron • — — E
600 LXD6, HLXD6, HHLXD6 LD6, HLD6, HHLD6 Sentron • • • A C E
NL, HL, LL 6 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLD6 Sentron • — — E
800 NM, HM, LM VL • • • A C E
MXD6, HMXD6 MD6, HMD66 Sentron • • • A C E
NM, HM, LM VL • • — C E
SMD6. SHMD6 Sentron • • — C E
CMD6, SCMD6 Sentron • — — E
1200 NN, HN, LN VL • • • B D B
NXD6, HNXD6 ND6, HND66 Sentron • • • B D B
NN, HN, LN VL • • — D B
SND6, SHND6 Sentron • • — D B
CND6, SCHD6 Sentron • — — B
1600 NP, HP, LP VL • • • 20(508) 38(965) B D B
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D B
NP, HP, LP 6 VL • • — D B
SPD6 Sentron • • — D B
CPD6, SCPD6 Sentron • — — B
2000 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D B
Insulated Case Circuit Breakers 4
800 WL Insulated Case Circuit Breaker • • 90(2286) 2 38(965) — D F
1200 • • 20(508) — D F
16004 • • — D F
20004 • • — D F
250045 • • — G H
300045 • • — G H
400045 • • — G H
500045 • 52 (1321) — G H
Fusible Switches
400 High Contact Pressure (HCP) • • • 90(2286) 2 38(965) A C E
600 • • • A C E
800 • • • A C E
1200 • • • A C E
800 4 Vacu-Break (VBS) • • • B D F
12004 • • • B D F
800 Bolted Pressure (BPS) • • • 20(508) B D F
1200 • • • B D F
1600 • • • B D F
2000 • • • B D F
25004 • • 46(1168) — G H
30004 • • — G H
40004 • • 52(1321) — G H
50004 • — — H
60004 • — — H

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) H 38, 48, 58 inches(965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm) J 48, 58 inches(1219, 1473 mm)

Service Sections
Service Sections
Service Sections

  1. Refer to page 26 for dimensions.
  2. 400A through 1000A FED by 500 kcmil – No
    pull box required. 400A through 1000A FED by
    750 kcmil – 10.0 inch (254mm) pull box required.
  3. 38 inch (965mm) wide required for outdoor
    NEMA 3R construction.
  4. For Type SB3, drawout WL breakers are available
    as an option. Minimum depth 38 inches
    (965mm).
  5. Not available in Enclosed Device type sections.
  6. Solid state trip unit only

Single Main Disconnects 

Single Main Disconnects
Single Main Disconnects
Single Main Disconnects
Single Main Disconnects

  1. efer to Page 26 for dimensions.
  2. 28 inch (711mm) deep required for Enclosed
    Device.
  3. For type SB3, drawout breakers are available as an option. Minimum depth 38 inches (965 mm).
  4. Insulated Case used as a through mainonly available in SB3 switchboard applications.
  5. 400 and 600A Vacu-Break Through Mains are available in 32.0 inch (813mm) wide.
  6. Solid state trip unit only.
  7. NEMA 3R requires side/rear access for installation. For front access NEMA 3R use 38 inch (965mm) section.
Max. Amp. Rating Device Type Device Family Device Applies To Switchboard Dimensions in Inches (mm)
Height Width Depth Available (D) Letters Reference Below
SB1   SB2 SB3   H1 W1 W2 W3 SB1 SB2 SB3
Molded Case Circuit Breakers
400 JXD6, HJXD6, HHJXD6 JD6, HJD6, HHJD6 Sentron • • • 90(2286) 322(813) 322(813) 322(813) A C E
NJ, HJ, LJ 6 VL • • — C E
SJD6, SHJD6 Sentron • • — C E
CJD6, SCJD6 Sentron • — — E
600 LXD6, HLXD6, HHLXD6 LD6, HLD6, HHLD6 Sentron • • • A C E
NL, HL, LL 6 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLJD6 Sentron • — — E
800 NM, HM, LM VL • • • A C E
MXD6, HMXD6 MD6, HMD6 Sentron • • • A C E
NM, HM, LM 6 VL • • — C E
SMD6, SHMD6 Sentron • • — C E
CMD6, SCMD6 Sentron • — — E
1200 NN, HN, LN VL • • • 38(965) A2 C2 E2
NXD6, HNXD6 ND6, HND6 Sentron • • • A2 C2 E2
NN, HN, LN 6 VL • • — C2 E2
SND6, SHND6 Sentron • • — C2 E2
CND6, SCND6 Sentron • — — E2
1600 NP, HP, LP VL • • • 38(965) 38(965) 40(1016) B D F
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D F
NP, HP, LP 6 VL • • — D F
SPD6 Sentron • • — D F
CPD6, SCPD6 Sentron • — — F
2000 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D F
Insulated Case Circuit Breakers 3 4
800 WL Insulated Case Circuit Breaker • • 90(2286) 25(635) 7 38(965) 32(813) — D F
1200 • • 38(965) — D F
1600 • • 40(1016) — D F
2000 • • — D F
2500 • • — — G H
3000 • • — G H
4000 • • 38(965) — G H
5000 • — — H
Fusible Switches
400 High Contact Pressure (HCP) • • • 90(2286) 38(965) 38(965) 32(813) A C E
600 • • • A C E
800 • • • A C E
1200 • • • 38(965) A C E
400 Vacu-Break (VBS) • • • — — 32(813) A C E
600 • • • A C E
800 • • • 38(965) 38 5(965) 38(965) B D F
1200 • • • B D F
800 Bolted Pressure (BPS) • • • 38(965) B D F
1200 • • • B D F
1600 • • • 40(1016) B D F
2000 • • • B D F
2500 • • 46(1168) 46(1168) 48(1219) — G H
3000 • • 52(1321) 52(1321) — G H
4000 • • — G H
5000 • — — H
6000 • — — H

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) H 38, 48, 58 inches(965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm) J 48, 58 inches(1219, 1473 mm)

Combination Sections

Utility Metering With Panel Mounted Main Disconnect
Combination Sections

Max. Amp. Rating Device Type Device Family Device Applies To Switchboard Dimension s in Inches (mm)
Height Pull Box 3 Unit Space 4 6 Width Depth Available (D) Letters Reference
SB1 SB2 SB3 H1 H2 H3 W SB1 SB2 SB3
Molded Case Circuit Breakers
400 JXD6, HJXD6, HHJXD6, JD6, HJD6, HHJD6 Sentron • • • 90(2286) 3 17.5(445) 32 1(813) A C E
NJ, HJ, LJ 4 VL • • — C E
SJD6, SHJD6 Sentron • • — C E
CJD6, SCJD6 Sentron • — — E
600 LXD6, HLXD6,HHLXD6, LD6, HLD6, HHLD6 Sentron • • • A C E
NL, HL, LL4 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLJD6 Sentron • — — E
800 NM, HM, LM4 VL • • • A C E
MXD6, HMXD6, MD6, HMD6 Sentron • • • — C E
NM, HM, LM VL • • — C E
SMD6, SHMD6 Sentron • • — C E
CMD6, SCMD6 Sentron • — — E
1200 NN, HN, LN VL • • • 12.5(318) 38(965) B D F
NXD6, HNXD6, ND6, HND64 Sentron • • • B D F
NN, HN, LN VL • • — D F
SND6, SHND6 Sentron • • — D F
CND6, SCND6 Sentron • — — F
Fusible Switches
400 High Contact Pressure (HCP) • • • 90(2286) 13.75(349) 32 1(813) A C E
600 • • • A C E
800 • • • A C E
1200 • • • 38 (965) B D F
400 Vacu-Break (VBS) • • • 11.25(292) 32 1(813) B D F
600 • • • B D F
  1. Weather proof sections require 38.0 inch (965mm) wide.
  2. See Page 26 for dimensions.
  3. 400/800 fed by 500kcmil – no pull box is required. 400/800 fed by 750kcmil – 10.0 inch (254mm pull box required. 1000/1200 required a 20.0 inch (508mm) top mounted pull box when fed by 500 or 850 kcmil.
  4. Solid state trip unit only.
  5. Ground fault required if section is service entrance and system voltage is greater than 150v to ground.
  6. See page 28 for dimensional information of panelmounted main and branch devices.
Depth Reference Chart
A 20 inches (508mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches H 38, 48, 58 inches(965, 1219,1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) J 48, 58 inches(1219, 1473 mm)

General Information

Molded Case Circuit Breaker Main
SB1 and SB2 combination service/ distribution sections house both a main service disconnect device and branch distribution disconnects. Switchboards can be furnished with “Suitable for Use

as Service Equipment” labels, but include no provisions for utility metering or customer metering.

Branch circuit device unit space varies, depending on the rating and consequent physical size of the main disconnect device. If more unit space is required than is shown in the tables below, one or more additional distribution sections must be added.
General Information

WL Main or Branch Combination Sections
General Information

General Information
General Information

  1. Unit may be inverted for bottom-feed applications.
  2. Load cables must exit bottom.
  3. Refer to page 26 for dimensions.
  4. Not available with load through bus.

Circuit Breaker Type 

Max. Amp. Rating Device Type Device Family Device Applies To Switchboard Dimensions in Inches (mm)
Height Width Depth Available
H1 Pull Box Unit Space 2 3 W1 W2 D1 D2 Conduit Area
SB1 SB2 SB3 H2 U11Without Through Bus U1 1With Through Bus U2 3 SB1 SB2 SB3 SB1 SB2 SB3 K L
400 JXD6, HJXD6, HHJXD6,JD6, HJD6, HHJD6 Sentron • • • 90(2286) — 56.25(1429) 53.75(1365) 46.25(1175) 32(813),38(895),& 46(1168) — A C E B D F 2.50(64) 3.00(76)
NJ, HJ, LJ 7 VL • • — C E — D F
SJD6, SHJD6 Sentron • • — C E — D F
CJD6, SCJD6 Sentron • — — E — — F
600 LXD6, HLXD6, HHLXD6LD6, HLD6, HHLD6 Sentron • • • A C E B D F
NL, HL, LL 7 VL • • — E E — D F
SLD6, SHLD6 Sentron • • — E E — D F
CLD6, SCLJD6 Sentron • — — E — — F
800 NM, HM, LM VL • • • 53.75(1365) 45(1143) A C E B D F
MXD6, HMXD6 MD6, HMD6 Sentron • • • A C E B D F
NM, HM, LM 7 VL • • — C E — D F
SMD6, SHMD6 Sentron • • — C E — D F
CMD6, SCMD6 Sentron • — — E — — F
1200 5 NN, HN, LN VL • • • 52.5(1334) 52.5(1334) 38(895)& 46(1168) B D F B D F
NXD6, HNXD6 ND6, HND6 Sentron • • • B D F B D F
NN, HN, LN 7 VL • • — D F — D F
SND6, SHND6 Sentron • • — D F — D F
CND6, SCND6 Sentron • — — F — — F
1600 5 NP, HP, LP VL • • • 6 — — 30(762) —  

 

38

(965)

 B D F B D F
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D F B D F
NP, HP, LP 7 VL • • — D F — D F
SPD6 Sentron • • — D F — D F
CPD6, SCPD6 Sentron • — — F — — F
2000 5 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D F B D F

 

Max. Amp. Rating Device Type Device Applies To Switchboard Dimensions in Inches (mm)
Height Width Depth Available
Pull Box Unit Space D1 D2 Conduit Area
SB1 SB2 SB3 H1 H2 U1 Without Through Bus U1 With Through Bus U2 With Through Bus W1 W2 SB1 SB2 SB3 SB1 SB2 SB3 K L M1 M2 M3
800 WLInsulated Case Circuit Breaker • • • 90(2286) — 37.5(952.5) — 45(1143) 38965.2) — D D D — — — 2.50(63.5) 3.0076.2) 28 min(711) 7.50(190.5) 6.00(152.4)
1200 • • • — — — D D D — — —
1600 • • • — — — D D D — — —
2000 • • • — — — D D D — — —

 

Depth Reference Chart
A 13.754, 20 inches3494, 508 mm) D 28, 38 inches (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)
  1. Not available in 13.75 inch (349 mm) deep.
  2. Dimensions shown are reduced by 10 inches (254mm) when external ground fault is required.
  3. See page 28 for dimensional information of panel mounted main and branch  devices.
  4. When incoming cables are greater than 500 kcmil, 46 inch (1168mm) wide section required.
  5. Service entrance label at 480V requires ground fault.
  6. Pull box height: Standard 500 kcmil lugs = 10 inch (254 mm). Alternate 750 kcmil lugs = 15 inch (381mm).
  7. Solid state trip unit only

Fusible Type
Fusible Type

400–1200A Vacu-Break Switch Main

Maximum Ampere Rating Applies To Switchboard Dimensions in Inches (mm)     Main Location     Service Entrance Label
Height Width Depth Available   Conduit Area
H1  Top Pull Box H2 3 Unit Space – H3 5 Unit Space H4 5 6    W Letters Refer To Chart Below
Without Load Through Bus With Load Through Bus
D1 D2
SB1 SB2 SB3 SB1 SB2 SB3 SB1 SB2 SB3 K L
400 • • •  90.00(2286)  — 43.75 (1111) 36.25 (921) 43.75(1111) 38.00 6(965) A C E B D F  2.50(64)  3.00(76) Top orBottom  Yes
600 • • • 41.25 (1048) 33.75 (857) A C E B D F
800 • • • 10.00 1(2.54)  30.00 (762)  30.00 (762) 30.00(762) 38.00(965) B D F B D F Top orBottom
1200 • • • B D F B D F Yes 7

400–1200A HCP Switch Main

Maximum Ampere Rating Applies To Switchboard Dimensions in Inches (mm)    Main Location   Service Entrance Label
Height Unit Space 8 Width Depth Available  Conduit Area
Letters Refer To Chart Below
D1 D2
SB1 SB2 SB3 H1 H3 5 H4 5 W SB1   SB2 SB3 SB1 SB2 SB3 K L
400 • • •  90.00(2286)  46.25(1175)  46.25(1175)  38.00 9(965) A C E B D F  2.50(64)  

3.00

(76)

  

Top or

Bottom

  

Yes 10
600 • • • A C E B D F
800 • • • A C E B D F
1200 • • • A C E B D F

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219,1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)
  1. Load cables must exit bottom when top fed and top when bottom fed.
  2. Refer to page 26 for dimensions.
  3. 15 inch (381 mm) pull box when alternate 750Kcmil lugs are used.
  4. Not available with load thru bus.
  5. See page 28 for dimensional information of panel mounted main and branch devices.
  6. 38 inch (965 mm) wide standard, 32 inch (813 mm) wide and 46 inch (1168mm) wide available as an option.
  7. Service entrance label available at 240V only.
  8. Unit Space dimensions shown are reduced by 10 inches (254mm) when ground fault is required.
  9. 6 inch (1168mm) wide available as an option.
  10. 1200A HCP switches rated 480V requires ground fault protection.

Fusible Type 

Main Bolted Pressure Switch
Combination Sections

800–2000A Bolted Pressure Switch Main, with or without Ground Fault 3

Maximum Ampere Rating Applies To Switchboard Dimensions in Inches (mm)     Main Location    Service Entrance Label
Height Depth   Conduit Area
H1 Top Pull Box — H2  Unit SpaceH3 4 Letter Refers To Chart Below
500kcmil Lugs 750kcmil Lugs
D
SB1 SB2 SB3 SB1 SB2 SB3 K L
800 • • •  90.00(2286)  10(254)  20(508)  30(762) B D F  2.50(64)  3.00(76)   Top Yes
1200 • • • B D F  

Yes 5
1600 • • • B D F
2000 • • • B D F
  1. Load cables must exit bottom.
  2. Refer to page 26 for dimensions.
  3. Service entrance available at 240V only.
  4. See page 28 for dimensional information of panel mounted branch
    devices.
  5. On bolted pressure switch rated 1000A or greater without
    ground fault, service entrance label available for 240V only.
Depth Reference Chart
A 20 inches (508 mm) D 28, 38 (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219,1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)

Auxiliary Entrance Sections

General Information
General Information

Pull Sections — Non-Bussed, Bussed, Including Customer Metering, Standard Utilities and EUSERC Utilities

Amp. Rtg. Standard Pull Section Dimensions in Inches (mm) EUSERC Pull Section Dimensions in Inches (mm)
Hgt. Width Depth Available Hgt. Width Depth Available
H Non-Bussed (Fig.1) Bussed Letters Refer To Chart Above    H  Bussed (Fig. 2) Bussed with Utility (Fig. 3 or Fig. 4) or Customer Metering (Fig. 2) Letter Refers to Chart Above
Std. 1 Opt.11 Std. with Customer Metering 1(Fig. 2) With Utility Metering1(Fig. 3)
D D
SB1 2 SB2 SB3 Std. Std. Opt. SB12 SB2 SB3
400         90(2286) 14(356) 20(508)   20(508)       38(965) or46(1168) A,B C E        90(2286)  32(813)  32 3(813)  38(965) A,B C E
600 20(508) 32(813) A,B C E A,B C E
800    25(635)    38(965) A,B C E A,B C E
1000 A,B C E 38(965) 38(965) — A,B C E
1200 A,B C E — A,B D B,H
1600   32(813) A,B C E 40(1016) 40(1016) — B D B,H
2000 A,B C E — B D B,H
2500  25(635)  46(1168) — G 4 H 4 48(1219)  6 7 — — G H
3000 — G 4 H 4 — — G H
4000 — G H 52 5(1321) 52 8(1321)   — — G H
5000  46(1168) — — H  —  —  

—

  

—

  

—
6000 46

(1168)

 52

(1321)

 46

(1168)

 — — H
  1. A Bussed Pull Section from Figure
  2. Is required when a EUSERC 2500-4000A
    utility is required. 2 Top or bottom feed.
  3. Pull sections without utility meters can be 28 inch (711m) deep minimum.
  4. 38 inch (965mm) available in outdoor applications.
  5. Determined by specific utility used.
  6. 58 inch (1473mm) available for San Diego Gas and Electric.
  7. With Customer Metering 48 inch (1219mm) wide.
  8. 2500A and greater EUSERC utilities cannot be placed in an incoming EUSERC
    pull section. An additional section is required in addition to the standard EUSERC bussed pull section. The width of the 2500A or 3000A EUSERC Utility Section is 38 inch (965mm) wide.
  9. 4000A EUSERC utilities cannot be placed in an incoming EUSERC pull section. An additional section is required in addition to the standard EUSERC bussed pull section. The width of the 4000A EUSERC Utility Section is 52 inch
    (1321mm) wide.

Distribution Sections

General Information
General Information

Main Lug Only Unit Space

Maximum Ampere Rating Section Configuration Service Equipment 3 4 AICRating Dimensions in Inches (mm)
Height Width Depth Available   Conduit Area
H1 Distribution Unit Space 2    W 1 Letter Refers To Chart Below
Connector Type
Standard 500 kcmil Alternate 750 kcmil 5 Crimp600 kcmil Max. 5 D
SB1 SB2 SB3 K L
400 Single withoutThrough-Bus Yes   200,000          90.00(2286) 62.50(1588) 60.00(1524) 55.00(1397)   32 or 38(813 or965) A, B C E          2.50(64)          3.00(76)
600 Single withoutThrough-Bus Yes 60.00(1524) 56.25(1429) 55.00(1397) A, B C E
 800 Single withoutThrough-Bus Yes 58.75(1492) 52.50(1334) 53.75(1365) A, B C E
 Multi With Through-Bus  Yes 42,000 51.25(1302) 45.00(1143) 46.25(1175)  B  C  E
100,000 45.00(1143) 38.75(984) 45.00(1143) 38(965)
 1200 Single without Through-Bus Yes 200,000 57.50(1461) 50.00(1270) 53.75(1365) 32 or 38(813 or965) A, B C E
 Multi With Through-Bus  Yes 42,000 50.00(1270) 42.50(1080) 46.25(1175)  B  C  E
100,000      45.00(1143)      38.75(984)      45.00(1143)      38(965)
 

1600

 Single without Through-Bus Yes 200,000 A, B C E
 

Multi With Through-Bus

  

Yes

 42,000  

B

  

C

  

E
100,000
 

2000

 Single without Through-Bus Yes 200,000 A, B C E
 

Multi With Through-Bus

  

Yes

 42,000  

B

  

C

  

E
100,000
  1. 46 inch (1168m) wide available as an option.
  2. See page 28 for dimensional information of panel mounted branch devices.
  3. A maximum of 6 service disconnects are allowed when switchboard is used as the service entrance equipment.
  4. Service disconnects 1000A or higher on solidly grounde Wye systems of more than 150V to ground require ground fault protection. External ground fault uses 10 inches of unit space. See NEC 230.95 for additional details. This applies to branch devices 1000A or larger on nonservice equipment unless a ground fault protection is provided upstream at the service. See NEC 240.13 for further information.
  5. For connector sizes greater than shown, a bussed pull section is required. See page 25 for bussed pull section requirements.
Depth Reference Chart
A 13.75 inches (349 mm)
B 20 inches (508 mm)
C 20, 28, 38 inches(508, 711, 965 mm)
E 20, 28, 38, 48, 58 inches(508, 711, 965 1219, 1473 mm)

Panel Mounted Unit Space Requirements 

Through-Bus Fed Distribution Section Dimensions

 Maximum Riser Amperage With Maximum Through-Bus Amperage As Applies to Switchboard Dimensions in Inches (mm)
Height Width Depth Available   Conduit Area
  H1  Unit SpaceH2 1   W Letters Refer To Chart Below
D
SB1 SB2 SB3 SB1 SB2 SB3 K L
2000 2000 • • •  90.0(2286) 65.0(1651) 32.0 or 38.02(813)   (965) A C E  2.5(64)  3.0(76)
2500 & 3000 — • • — C E
4000 — • • — C E
3000 4000 — • • 62.5

(1588)

 38.0 or 46.0 (965) (1168) — C E

 

Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm) G 38 inches (965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm) H 38, 48, 58 inches(965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm)

Panel Mounted Unit Space Requirements — Molded Case Circuit Breakers

Max. Amp Rating Device Type Device Family Device Applies to Switchboard Total Poles Available Dimensions in Inches (mm)
Height
Unit Space Width
 Twin Mounted  Single Mounted Minimum Enclosure Width
SB1 SB2 SB3 1P 2P 3P
 100 BQD General • • • 6 2 2 3.75 (95)          —          32(813)
BQD (with sidecar accessories) General • • • — 2 2 6.25 (159)
   125 BL, BLH, HBL General • • • 6 2 2 3.75 (95)
BL, BLH, HBL (withsidecar accessories) General • • • — 2 2 6.25 (159)
xGB, NEB, HED, ED4ED6, HED4, HHED6, CED6 General • • • 6 2 2 3.75 (95)
xGB, NEB, HED, ED4ED6, HED4, HHED6, CED6(with sidecar accessories)  General  •  •  •  —  2  2  6.25 (159)
 150 3VA61 – MDAE, HDAE, CDAE, LDAE 3VA • • • — — 2     5.00 (127)
ND, HD, LD VL • • — — 2
225 QJ2, QJH2, QJ2H, QR2, QR2H, HQR2, HQR2H General • • • — 2 2
  250 FXD6, FD6, HFXD6, HFD6, HHFXD6, HHFD6 Sentron • • • — 2 2
3VA52 – MFAS, HFAS, CFAS 3VA • • • — 2 2
3VA62 8- MFAE, HFAE, CFAE, LFAE 3VA • • • — 2 2
NF, HF, LF 5 VL • • — — 2
CFD6 Sentron • — — 1 — 5.00 (127)   32 (813)or 386(965)
400 JXD6, JD6, HJXD6, HJD6, HHJXD6, HHJD6 Sentron • • • — 2 2 8.75 (222) 8.75 (222)
NJ, HJ, LJ 7 VL • • — — 2 6.25 (159) 6.25 (159)
SJD6, SHJD6 Sentron • • — — 2 8.75 (222)   8.75 (222)
CJD6 Sentron • — — 1        —
SCJD6 Sentron • — — 1
600 LXD6, LD6, HLXD6, HLXD6, HHLXD6, HHLD6 Sentron • • • — — 1    32 (813)
NL, HL, LL 5 VL • • — — 1 6.25 (159)
SLD6, SHLD6 Sentron • • — — 1  8.75 (222)
CLD6, SCLD6 Sentron • — — 1
8003, 4 NM, HM, LM VL • • • — — 1
NM, HM, LM 5 VL • • — — 1
MXD6, MD6, HMXD6, HMD6 Sentron • • • — — 1    10.00(254)  38 (965)
SMD6, SHMD6 Sentron • • — — 1
CMD6, SCMD6 Sentron • — — 1
12003, 4 NN, HN, LN VL • • • — — 1  38 3(965)

Distribution Sections

  1. See below for unit space of disconnect devices.
  2. 46 inch (1168 mm) wide optional.
  3. 46 inch (1168 mm) section width required when standard load connectors are greater than 600 kcmil or when compression lugs are required.
  4. 100% rated panel mounted branch devices are limited to a maximum of 2 devices per distribution section. Additional 80% rated devices are allowed when two 100% rated devices are installed into one section, when additional space is available.
  5. Solid state trip unit only.
  6. Twin mounted 400A MCCBs requires a 38” section.
  7. Twin mounted 400A VL JG solid state MCCBs does not allow access to the trip unit with the breaker installed.
  8. 3VA62 breaker will be available in Fall 2019.

Panel Mounted Unit Space Requirements

Panel Mounted Unit Space Requirements — Fusible Switches

  Max. Rating   Switch Type Device Applies to Switchboard Dimensions in Inches (mm)
Unit Space Mounting Height Width
240V 600V Enclosure Minimum W
SB1 SB2 SB3 Twin Single Twin Single
30-30       Vacu-Break • • • 2.50 (64) 1    — —    —      32.00 (813)
30-30 • • •  5.00 (127)  7.50(191)
30-60 • • •
60-60 • • •
100-100 • • • 7.50 (191)
200-200 • • • 10.00 (254) 2 10.00(254) 3  38.00 (965)
100 • • •   — 7.50 (191)   — 7.50 (191) 32.00 (813)
200 • • • 10.00 (254) 10.00 (254)
400 • • • 10.00 4 (254),15.00 (381) 10.00 4 (254),15.00 (381)  38.00 (965)
600 • • • 15.00 (381) 15.00 (381)
400-1200 HCP • • • 16.25 (413) 16.25 (413)
  1. The 2.5 inch (64mm) high unit is suitable for NEC Class H, K1, and K5 fuses only. Class R rejection type fuse holders are not available.
  2. Unit rated 600V, factory configured to accept 250V class H, K or R fuses. Field convertible to accept Class J fuses.
  3. Factory configure to accept Class J fuses only.
  4. 10” – 400A VB switch limited to Series A type only, Class J up to 480V or Class R fuse 240V Max.

2-High and Remote Mains

Individually Mounted Vacu-Break and Bolted Pressure Switch 2-High Sections and Combination Sections
Distribution Sections

Large Tenant Mains and Remote Mains
Large Tenant Main sections are designed for use in the western United States with EUSERC Utility metering compartments when the tenant loading is greater than 200 ampere. At 200A and below, the SMM commercial metering switchboard section is available.

Remote Main sections are designed for non EUSERC utility metering compartment requirements for tenant amperage requirements above 200 ampere. All utility metering compartments must meet specific utility compartment specifications. For metering compartments 200 amp and below, the MMS commercial metering switchboard section is available.

  1. 1000A and 1200A Vacu-Break devices are not available as service disconnects when the voltage is greater than 150V to ground.
  2. Top mounted pull box reduced to 15 inches (381 mm) high when 500 kcmil or less load connectors are provided.
Depth Reference Chart
A 20 inches (508 mm) D 28, 38 (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219,1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)

Standard Utility Remote Mains and EUSERC Large Tenant Mains
Distribution Sections

2-High and Remote Mains

  Max. Amp. Rating    Device Type    Device Family  Device Applies To Switchboard Dimensions in Inches (mm)
  Pull Box   Width Depth Available (D) Letters Reference Below
SB1 SB2 SB3 H1 H2 H3 W SB1 SB2 SB3
Molded Case Circuit Breakers
  400 JXD6, HJXD6, HHJXD6 JD6, HJD6, HHJD6 Sentron • • •               90(2286)      2               2               38(965) A C E
NJ, HJ, LJ 6 VL • • — C E
SJD6, SHJD6 Sentron • • — C E
CJD6, SCJD6 Sentron • — — E
  600 LXD6, HLXD6, HHLXD6 LD6, HLD6, HHLD6 Sentron • • • A C E
NL, HL, LL 6 VL • • — E E
SLD6, SHLD6 Sentron • • — E E
CLD6, SCLJD6 Sentron • — — E
  800 NM, HM, LM VL • • •         101(254) A C E
MXD6, HMXD6 MD6, HMD6 Sentron • • • A C E
NM, HM, LM 6 VL • • — C E
SMD6, SHMD6 Sentron • • — C E
CMD6, SCMD6 Sentron • — — E
  1200 NN, HN, LN VL • • • B D F
NXD6, HNXD6 ND6, HND6 Sentron • • • B D F
NN, HN, LN 6 VL • • — D F
SND6, SHND6 Sentron • • — D F
CND6, SCND6 Sentron •    106(254) — — F
  16003 NP, HP, LP VL • • • B D F
PXD6, HPXD6 PD6, HPD6 Sentron • • • B D F
NP, HP, LP 6 VL • • — D F
SPD6 Sentron • • — D F
CPD6, SCPD6 Sentron • — — F
20003 RXD6, HRXD6 RD6, HRD6 Sentron • • • B D F
Insulated Case Circuit Breakers 5
800  WL Insulated Case Circuit Breaker • •  90(2286)  101(254) 2  38(965) — D F
1200 • • 106(254) — D F
1600 3 • • — D F
2000 3 • • — D F
Fusible Switches
400  High Contact Pressure (HCP) • • •      90(2286)  2        2      38 (965) A C E
600 • • • A C E
800 • • •    10 1(254) A C E
1200 • • • A C E
400  Vacu-Break (VBS) • • • B D F
600 • • • B D F
800 • • • B D F
1200 • • • B D F
800  Bolted Pressure (BPS) • • • B D F
1200 • • • B D F
16003 • • • B D F
20003 • • • B D F
  1. 1 Top mounted pull box reduced to 15 inches (381 mm) high when 500 kcmil or less load connectors are provided.
  2. Cold sequence utilities are not available in SB1/2 applications.
  3. All Weather proof sections require 38.0 inch (965 mm) wide.
  4. For type SB3, drawout WL breakers are available as an option. Minimum depth is 38 inches (965 mm).
  5. When EUSERC Utilities are required, minimum depth is 28.0 inches (711 mm).
  6. Solid state trip unit only
Depth Reference Chart
A 20 inches (508 mm) D 28, 38 inches (711, 965 mm)
B 28 inches(711 mm) E 20, 28, 38, 48, 58 inches(508, 711, 965, 1219, 1473 mm)
C 20, 28, 38 inches(508, 711, 965 mm) F 28, 38, 48, 58 inches(711, 965, 1219, 1473 mm)

Motor Starter Applications 

Application Note: 1
ETI instantaneous-trip circuit breakers are recommended for use in combination motor starters to provide selective short circuit protection for the motor branch circuit. The adjustable instantaneous-trip feature provides for a trip setting slightly above the peak motor inrush current.

With this setting, no delay is introduced in opening the circuit when the fault occurs. Since these circuit breakers have no time-delay trip element, they must be used in conjunction with, and immedi ately ahead of, the motorrunning over-current protective device.

Check the voltage and interrupting rating of the circuit breaker to assure that they are adequate for the electrical system. ETI circuit breakers are UL recognized components and must be used if the switchboard section is also to be UL Listed.

ETI Circuit Breakers (Instantaneous Trip Only) For Branch-Circuit Use with AC Full Voltage Motor Starters

 Ampere Rating  Breaker Type Maximum 3Ø Ratings Mounting Height in Inches (mm)
220(208)V 240V 480V 2 3 Twin Single Min. Section Width inches (mm)
3    ED 2 — — 1 5 (127) — 32 (813)
5 0.5 0.5 2 5 (127) — 32 (813)
10 2 2 3 5 (127) — 32 (813)
25 5 5 10 5 (127) — 32 (813)
50 15 15 30 5 (127) — 32 (813)
100 30 30 60 5 (127) — 32 (813)
150 FD6 3 40 40 75 5 (127) — 32 (813)
225 FD6, CFD6 50 50 100 5 (127) — 32 (813)

Vacu-Break Fusible Switches For Branch Circuit Use with AC Combination Full Voltage Starte

Ampere Rating Horsepower Ratings Mounting Height in Inches (mm) Min. Sec. Width
240V AC 480V AC 240V AC 480V AC
With NEC Fuse With Dual- Element Fuse With NEC Fuse With Dual- Element Fuse Twin Single Twin Single
30-30 3 7.5 — — 2.50 5(64) — — — 32
30-30 3 7.5 5 10 5.00(127) — 7.50(191) — 32
30-60 3–7.5 7.5–15 5–15 25 5.00(127) — 7.50(191) — 32
60-60 7.5 15 15 25 5.00(127) — 7.50(191) — 32
60-100 7.5–15 15–30 15–25 25–50 7.50(191) — 7.50(191) — 32
100-100 15 30 25 50 7.50(191) — 7.50(191) — 32
100 — — 25 50 — — — 7.50(191) 32
200 25 50 50 100 — 10.00(254) — 10.00(254) 32
200-200 — 50 — 100 10.00(254) — 10.00(254) — 32
400 50 100 100 — — 15.00(381) — 15.00(381) 38
600 75 100 — — — 15.00(381) — 15.00(381) 38
  1. 1 Available only in SB3 switchboard configurations.
  2. 100,000 kA at 480V with E Frame and CFD6-Frame breakers.
  3. 65,000 kA at 480V with F-Frame Breakers.
  4. 100,000 kA at 480V with Class J or Class RK5 fuses.
  5. The 2.50 inch (64 mm) high unit is suitable for NEC Class H and K5 fuses only. Class R rejection type fuse holders are not available.

Full Voltage Non–Reversing Starters Class A20

NEMAStarter Size Unit space Mtg. Ht. In. (mm) Min. Encl. WidthIn. (mm)
Left Right
0 — 5 6(127) 32(813)
0 0
1 — 5 6(127)  32(813)
1 0
1 1
2 —  10(254)  32(813)
2 0
2 1
2 2
3 —   15(381)   32(813)
3 0
3 1
3 2
3 3
4 — 15(381) 32(813)

Increase to 7.50 inch (191mm) when pilot light or control transformer is required

Maximum 3 Phase Horsepower Rating

NEMAStarter Size Voltage AC
220(208)V 240V 480V
0 3 3 5
1 7.5 7.5 10
2 10 15 25
3 25 30 50
4 40 50 100

Specialty Connections

Busway Connections’

Siemens Busway is excellent for use with Siemens Type switchboards. It is a low reactance power busway available with aluminum or copper bars in 3-phase, 3-wire, or 3-phase, 4-wire configuration, with or without ground bar.

Dimensions and Phase Sequence
The drawings at right show the phase sequence and the location of the centerline of the busway opening for each configuration, referenced to the switchboard front and side planes. Phasing shown conforms to NEMA standards and is preferred, unless alternate phasing is required by special customer terminations.

Section Depth D2 D3
20” 10” 10”
28” 18” 14”
38” 19” 19”
48” 19” 19”
58” 19” 19”

Specialty Connections
Specialty Connections

1 25” Wide WL section does not support Left to right phasing. Use 38” WL section for left to right phasing.

Device Amperage Dimensions (in inches and mm)
Section Width (W) Section Depth (D1)

Pull section

 400 – 1200 20 (508) 20, 28, 38(508, 711, 965)
1600 – 2000 32 (813) 20, 28, 38(508, 711, 965)
2500 – 4000 32, 38, 46(813, 965, 1168) 28, 38(711, 965)
Molded Case Circuit Breaker 400 – 2000

38 (965)

 20, 28, 38(508, 711, 965)
Vacu-BreakSwitches (VBS) 800 – 1200
High Contact Pressure (HCP) Switches) 400 – 1200 28, 38(711, 965)
Bolted Pressure Switches (BPS) 800 – 2000
2500 – 5000 46 (1168) 38, 48, 58(965, 1219, 1473)
WL InsulatedCase Circuit Breakers 400 – 2000 38 (965) 28, 38(711, 965)
2500 – 5000 38 (965) 38 (965)

Unit Substation Secondary Transformer Connections’

Siemens Switchboard Unit Substations
Siemens offers a wide variety of unit substation designs to meet virtually any customer requirement. A unit substation consists of one or more transformers mechanically and electrically connected to, and coordinated with, one or more switchboard assemblies. A secondary unit substation is defined as a unit substation whose outgoing section is rated below 1,000 volts.

The key benefit of a secondary unit substation is that it economically brings power as close as possible to the loads, minimizing power loss and maximizing voltage regulation. Every component or assembly utilized in secondary unit substations is engineered to be an integral part of a complete system.

A typical unit substation consists of three sections:

  • Primary: depending upon the specific application, this section accepts medium-voltage (2,400V to 27,600V) incoming power
  • Transformer: reduces incoming voltage to utilization voltage (600V or less)
  • Secondary switchboard: distributes power to, and provides protection for, outgoing feeders (600V and less)

A secondary unit substation helps you:

  • Reduce power losses
  • Enhance voltage regulation
  • Improve service continuity
  • Increase functional flexibility
  • Lower installation costs
  • Minimize space utilization

Siemens Switchboard Secondary
Siemens unit substation secondary switchboards can be provided with all standard switchboard features. In addition to the standard features, flexible connectors are used to make a close coupled connection between the switchboard secondary and the medium voltage transformer.

The flexible connectors feed the through bus of the switchboard, a secondary main disconnect and several feeder devices that are used for distributing and monitoring the power.

Unit substations are commonly doubleended, being connected to two separate utilities for redundant power. With a double-ended switchboard in a main-main or main-tie-main scheme, autothrowover can be used to automatically transfer between the two utilities.

Specialty Connections

Outdoor Enclosures

For Switchboard Sections
Outdoor Enclosures

  1. 4.125 inches (104.28 mm) is standard.
  2. 11.125 inches (282.58 mm) will be furnished with socket type watthour meter and other deep devices. Front access only for West Coast applications

General Application Data

In the application of fusible switches and
circuit breakers, consideration should be
given to the following factors:

  1. Circuit voltage
  2. Circuit ampacity
  3. Power source frequency
  4. Operation conditions
  5. Available fault current

Circuit Voltage
The system voltage should not exceed the listed voltage rating of the circuit breaker, fuse or switch.

Circuit Ampacity
The listed continuous current rating of the fuse or circuit breaker should not exceed the allowable ampacity of the conductors. Where the allowable ampacity of the conductors does not correspond to listed current ratings for fuses or circuit breakers, the next larger is permitted, providing it does not exceed the conductor ampacity by more than 25% (800A max —NEC 240.6). An exception to this ruleis permitted for motor circuits where high inrush currents may persist for a short time.

Power Source Frequency
Circuit breakers and fusible switches are calibrated for use on direct current or 60 Hertz alternating current. For frequencies above 60 Hertz, some fuses, switches and circuit breakers must be derated. The derating varies with each type and size of protective device. The protective devices used for frequencies above 60 Hertz are not UL listed. Consult your nearest Siemens sales office for specific information.

Operating Conditions
Molded case circuit breakers and fuses are calibrated, without an enclosure as specified by the Underwriter’s Laboratories, Inc. Per NEC 384, continuous leads should not exceed 80% of the breaker or fuse current rating for most breakers and most types of enclosures.

Conductors should be derated in accordance with the National Electrical Code, Table 310.15 for both ambient temperature and continuous loading. Correction factors to be applied to the allowable current-carrying capacities of conductors for application in temperatures above 30ºC. Conductors which are loaded continuously should be derated to 80% of their allowable current-carrying capacity.

When the type of load is unusual, intermittent, or one which involved momentary peak currents such as motor loads, consideration should be given to the heating effect on the protective device and conductor over a period of time. The duty cycle of a motor which is started and stopped frequently may require a circuit breaker or fuses and conductor with a higher rating than an infrequently started motor.

Fault Current Available
The interrupting capacity of the circuit breaker or fused switch should be at least equal to the available short circuit current at the point of application. The short circuit current from some power sources, such as engine driven generators, is limited, and the prospective characteristics should be selected to clear such faults without delay.

Some systems require a study of protective device characteristics to assure proper protection and  coordination for any possible value of fault current. Your nearest Siemens representative is available to assist in making coordination studies.

The data shown in the table on the next page is precalculated and based only on the power transformer impedance in percent and maximum short circuit kVA available from primary system. The data is of approximate values of maximum fault current available on secondary of transformer.

General Application Data

Transformer Rating 3 Phase kVA and Impedance % 1 Maximum Short Circuit kVA Available From Primary System 208 Volts, 3 Phase 240 Volts, 3 Phase 480 Volts, 3 Phase 600 Volts, 3 Phase
Rated Load Continuous Current, Amps Short-Circuit Current RMS Symmetrical Amps Rated Load Continuous Current, Amps Short-Circuit Current RMS Symmetrical Amps Rated Load Continuous Current, Amps Short-Circuit Current RMS Symmetrical Amps Rated Load Continuous Current, Amps Short-Circuit Current RMS Symmetrical Amps
Transformer Alone 50% Motor Load 2 Combined Transformer Alone 100% Motor Load 2 Combined Transformer Alone 100% Motor Load 2 Combined Transformer Alone 100% Motor Load 2 Combined

3005%

 50,000

834

 14,900

1,700

 16,600

772

 12,900

2,900

 15,800

361

 6,400

1,400

 7,800

289

 5,200

1,200

 6,400
100,000 15,700 17,400 13,600 16,500 6,800 8,200 5,500 6,700
150,000 16,000 17,700 13,900 16,800 6,900 8,300 5,600 6,800
250,000 16,300 18,000 14,100 17,000 7,000 8,400 5,600 6,800
500,000 16,500 18,200 14,300 17,200 7,100 8,500 5,700 6,900
Unlimited 16,700 18,400 14,400 17,300 7,200 8,600 5,800 7,000

5005%

 50,000

1,388

 21,300

2,800

 25,900

1,203

 20,000

4,800

 24,800

601

 10,000

2,400

 12,400

481

 8,000

1,900

 9,900
100,000 25,200 28,000 21,900 26,700 10,900 13,300 8,700 10,600
150,000 26,000 28,800 22,500 27,300 11,300 13,700 9,000 10,900
250,000 26,700 29,500 23,100 27,900 11,600 14,000 9,300 11,200
500,000 27,200 30,000 23,600 28,400 11,800 14,200 9,400 13,000
Unlimited 27,800 30,600 24,100 28,900 12,000 14,400 9,600 11,500

7505.75%

 50,000

2,080

 28,700

4,200

 32,900

1,804

 24,900

7,200

 32,100

902

 12,400

3,600

 16,000

722

 10,000

2,900

 12,900
100,000 32,000 36,200 27,800 35,000 13,900 17,500 11,100 14,000
150,000 33,300 37,500 28,900 36,100 14,400 23,500 11,600 14,500
250,000 34,400 38,600 29,800 37,000 14,900 18,000 11,900 14,800
500,000 35,200 39,400 30,600 37,800 15,300 18,900 12,200 15,100
Unlimited 36,200 40,400 31,400 38,600 15,700 19,300 12,600 15,500

1,0005.75%

 50,000

2,780

 35,900

5,600

 41,500

2,406

 31,000

9,600

 40,600

1,203

 15,500

4,800

 20,300

962

 12,400

3,900

 16,300
100,000 41,200 46,800 35,600 45,200 17,800 22,600 14,300 18,200
150,000 43,300 48,900 37,500 47,100 18,700 23,500 15,000 18,900
250,000 45,400 50,800 39,100 48,700 19,600 24,400 15,600 19,500
500,000 46,700 52,300 40,400 50,000 20,200 25,000 16,200 20,100
Unlimited 48,300 53,900 41,800 51,400 20,900 25,700 16,700 20,600

1,0008%

 50,000

1,203

 12,030

4,800

 16,830
100,000 13,350 18,150
150,000 13,980 18,750
250,000 14,315 19,115
500,000 14,555 19,355
Unlimited 15,040 19,840

1,5005.75%

 50,000

3,609

 41,200

14,400

 55,600

1,804

 20,600

7,200

 27,800

1,444

 16,500

5,800

 22,300
100,000 49,800 64,200 24,900 32,100 20,000 25,800
150,000 53,500 57,900 26,700 33,900 21,400 27,200
250,000 56,800 71,200 28,400 35,600 22,700 28,500
500,000 59,600 74,000 29,800 37,000 23,900 29,700
Unlimited 62,800 77,200 31,400 38,600 25,100 30,900

2,0005.75%

 50,000

2,406

 24,700

9,600

 34,300

1,924

 19,700

7,800

 27,500
100,000 31,000 40,600 24,800 32,600
150,000 34,000 43,600 27,200 35,000
250,000 36,700 46,300 29,400 37,200
500,000 39,100 48,700 31,300 39,100
Unlimited 48,100 51,400 33,500 41,300

2,5005.75%

 50,000      

 

3,008

 28,000  

 

12,000

 40,000  

 

2,405

 22,400  

 

9,600

 32,000
100,000 36,500 48,500 29,200 38,800
150,000 40,500 52,500 32,400 42,000
250,000 44,600 56,600 35,600 45,200
500,000 48,100 60,100 38,500 48,100
Unlimited 52,300 64,300 41,800 51,400

Standard and Compression Lugs 

Molded Case Circuit Breaker — Standard Mechanical Lugs

Max. Frame Rating  Brealer Family  Breaker Type Breaker Ampere Rating Cables per Lug  Standard Lug Wire Range
 100  General  BQD, BQD6 15 – 40 1 #14 – #6 Cu#12 – #6 Al
45 – 100 1 #8 – #1 Cu #6 – 1/0 Al
           125            General      BL, BLH, HBL 15 – 20 1 #14 – #10 Cu#12 – #10 Al
25 – 35 1 #14 – #6 Cu#12 – #6 Al
40 – 50 1 #8 – #6 Cu#8 – #4 Al
55 – 70 1 #8 – #4 Cu#8 – #2 Al
80 – 100 1 #4 – 1/0 Cu #2 – 1/0 Al
110 – 125 1 #2 – 1/0 Cu1/0 – 2/0 Al
 xGB 15 – 30 1 #8 – #1/0 Cu #8 – #2/0 Al
35 – 125 1 #8 – #1/0 Cu #12 – #6 Al
NEB, HEB 15 – 125 2 #14 – 1/0 Cu/Al #8 – 2/0 Cu/Al
 ED2, ED4, ED6, HED4, HHED6 15 – 125 1 #14 – #10 Cu#12 – #10 Al
30 – 100 1 #10 – 1/0 Cu/Al
110 – 125 1 #3 – 3/0 Cu #1 – 2/0 Al
CED1 Pole ED 30 – 60 1 #10 – #4 Cu/Al
70 – 100 1 #4 – 1/0 Cu/Al
  150  3VA 3VA61- MDAE, HDAE, CDAE, LDAE  40-150  1 #14-1/0 AL/CU#6 – 350 kcmil AL/CU
VL ND, HD, LD 30 – 150 1 #6 – 2/0 AL/CU #6 – 3/0CU
225 General QR2, QR2H, HQR2, HQR2H 100 -225 1 #6 – 300 kcmil Cu#4 – 300 kcmil Al
    250 3VA 3VA52 – MFAS, HFAS, CFAS 100-250 1 #6 – 350 kcmil AL/CU
 3VA 3VA62 2 -MFAE, HFAE, CFAE,LFAE  100-250  1 #14-1/0 AL/CU#6-350kcmil AL/CU
VL NF, HF, LF 50-250 1 #4 – 350 kcmil AL/CU#4 – 350 kcmil CU
 Sentron FXD6, FD6, HFXD6, HFD6, HHFXD6, HHFD6, CFD6  70 – 250  1  #6 – 350 kcmil Cu#4 – 350 kcmil Al
   400 VL NJ, HJ, LF 70 – 400 1 – 2 3/0 – 250 kcmil Cu/Al 3/0 – 750 kcmil Al
  Sentron SJD6, SHJD6, SCJD6 65 – 200 1 #4 – 350 kcmil Cu/Al
JXD6, JD6, HJXD6, HJD6, HHJXD6,HHJD6, SJD6, SHJD6, CJD6, SCJD6  200 – 400  1 – 2  3/0 – 500 kcmil Cu 4/0 – 500 kcmil Al
   600 VL NL, HL, LL 150 – 600 1 – 2 2/0 – 600 kcmil Al/Cu 2/0 – 600 kcmil Cu
  Sentron LXD6, LD6, HLXD6, HLD6, HHLXD6, HHLD6,SLD6, SHLD6,CLD6, SCLD6   250 – 600   1 – 2  3/0 – 500 kcmil Cu 4/0 – 500 kcmil Al
  800 VL NM, HM, LM 200 – 800 1 – 3 1/0 – 500 kcmil Cu/Al 1/0 – 500 kcmil Cu
 Sentron MXD6, MD6, HMXD6, HMD6, SMD6, SHMD6 500 – 600 1 – 2 #1 – 500 kcmil CU/Al
1 – 3 1/0 – 500 kcmil Cu/Al
700 – 800 1 – 3 500 – 750 kcmil Cu/Al

Molded Case Circuit Breaker — Standard Mechanical Lugs (cont’d)

Max. Frame Rating Breaker Family Breaker Type Breaker Ampere Rating Cables per Lug Standard Lug Wire Range
  1200 VL NN, HN, LN 300 – 1200 1 – 4 1/0 – 500 kcmil Cu/Al 1/0 – 500 kcmil Cu
 Sentron NXD6, ND6, HNXD6, HND6, SND6, SHND6, CND6, SCND6  800 – 1200  1 – 4  240 – 500 kcmil Cu/Al
  1600 VL NP, HP, LP 1200 – 1600 1 – 6 1/0 – 750 kcmil Cu/Al 300 – 600 kcmil Cu
 Sentron PXD6, PD6, HPXD6, HPD6, SPD6, SHPD6  1200 – 1600  1 – 5 300 – 600 kcmil Cu/Al
2000 Sentron RXD6, RD6, HRXD6, HRD6 1600 – 2000 1 – 6 300 – 600 kcmil Cu/Al

Vacu-Break Fusible Switches (Branch Connectors)

Ampere Rating Cables per Connector Wire Range  Type
30 (2.5 in.)(64 mm) 1 #14 – #8 AWG Cu
30 1 #14 – #4 AWG Cu or Al
60 1 #14 – #4 AWG Cu or Al
100 1 #1/0 AWG Cu or Al
200 1 #6 AWG – 350 kcmil Cu or Al
400 2 #4/0 AWG – 500 kcmil Cu or Al
600 2 #4/0 AWG – 500 kcmil Cu or Al
800 3 #4/0 AWG – 500 kcmil Cu or Al
1200 4 #4/0 AWG – 500 kcmil Cu or Al

HCP Fusible Switches (Branch Connectors)

Ampere Rating Cables per Connector Wire Range  Type
400 – 600 2 #1 AWG-500 kcmil Cu or Al
400 – 600 2 #1 AWG-500 kcmil Cu only
400 – 800 3 #1 AWG-500 kcmil Cu or Al
400 – 800 3 #1 AWG-350 kcmil Cu only
800 – 1200 4 #1 AWG-500 kcmil Cu or Al
800 – 1200 3 #250-500 kcmil Cu only

Fusible Bolted Pressure Switches 1 (Branch Connectors)

Ampere Rating Cables per Connector Wire Range  Type
800 2 #4/0 AWG – 750 kcmil Cu or Al
1200 4 #4/0 AWG – 750 kcmil Cu or Al
1600 6 #4/0 AWG – 750 kcmil Cu or Al
2000 6 #4/0 AWG – 750 kcmil Cu or Al

Starters and Contactors (Lug Data)

NEMA Size Lugs per Pole Wire Range Type
00-1 1 #14 – #8 AWG Cu Only
2 1 #14 – #4 AWG Cu Only
3 1 #14 – #1/0 AWG Cu/Al
  1. Not available with breaker or switch. Requires bussing to install.
  2. 3VA62 breaker will be available in Fall 2019.

Metering

Utility Metering
Requirements for power company metering and instrument transformer requirements vary with serving utility. Typically, utility company current transformers require a 30 inch (762 mm) high compartment. Switchboard sections that contain utility metering must meet the utility metering compartment specifications.

Customer Metering
A full complement of switchboard instruments with appropriate current  transformers, potential transformers and selector switches are available in all

Siemens switchboards.
The meters and instrument switches are mounted on hinged panels with potential transformers and fuses mounted on an instrument pan located behind the door. Current transformers are mounted on the main bus or, at the load terminals of the branch device and do not require additional unit space.

Power Meters
Siemens ACCESS metering solutions offer a complete selection of components and software that can be applied in switchboards. Both the PAC series and 9000 series power meters can be integrated into a switchboard. Power meters are supplied in auxiliary compartments and can be placed in switchboard pull sections, main service sections and distribution sections. In addition to power meters, ACCESS can integrate communications from the VL solid state circuit breakers, WL insulated case circuit breakers and various motor control protective devices.

Siemens ACCESS WinPM.Net Device Importer provides seamless integrated

communication with other manufacturers’ products, provided they have a MODBUS /RTU or MODBUS/TCP port available. Importer compatible products include

  • Engine Generator Sets
  • Power Monitors
  • Protective Relays
  • Uninterruptible Power Systems (UPS)
  • Programmable Logic Controllers
  • Transfer Switches
  • Power Distribution Units
  • Industrial Automation Systems
  • Building Management Systems

For more information on compatible products and systems and to find out what ACCESS and other Siemens products can do for you, visit HYPERLINK “http://www.usa.siemens.com/pds” www.usa.siemens.com/pds or call 1-800-427-2256.

Metering

Interrupting Capacity Ratings

Of Disconnect Devices

Molded Case Circuit Breakers
Thermal Magnetic Trip Units Molded case thermal magnetic circuit breakers are available 15-2000 amperes with interruption ratings up to 200,00 AIC. Interruption ratings are typically tested qt 240V, 480V or 600V. These breakers come with a wide array of accessories, including: shunt trip, motor operator, auxiliary switches, alarm switches as well as several others.

Solid State Trip Units
Solid state molded case circuit breakers are available in frame sizes from 150- 1600 amperes and up to 600V AC. Each of these breakers has solid-state circuitry which assures minimal damage through the quick interruption control of fault currents. They allow for finite  adjustment of short-time delay and ground fault and feature zone selective interlocking as well as MODBUS and PROFIBUS communication.

Current-Limiting
These breakers incorporate the exclusive Siemens blow-apart interruption principle and meet the NEC requirements for current-limiting breakers. Current-limiting circuit breakers can limit the let-through I2t to a value less than the I2t of one-half cycle wave of the symmetrical prospective current without any fusible elements when operating within their currentlimiting range.

VL LG Thermal Magnetic Circuit Breaker
Capacity Ratings

VL FG Solid State Circuit Breaker
Capacity Ratings

3VA62 Solid State Breaker
Capacity Ratings

Ampere Rating

 Breaker Type Maximum IC (KAIC)Symmetrical Amperes Unit Spacein Inches (mm)
TripType FrameType BreakerFamily 240V 480Y/277V Available Trip Values 480V 600Y/347V 600V Single Twin

100

Thermal Magnetic

General Application

 BL 10 — 15-60, 70, 80, 90, 100, 110, 125 — — — — 3.75 (95) 2, 3
BLR 10 — 15, 20, 30, 40, 50, 60, 70, 80, 90, 100 — — — — 3.75 (95) 2, 3
BLH 22 — 15-60, 70, 80, 90, 100, 110, 125 — — — — 3.75 (95) 2, 3
HBL 65 — 15-60, 70, 80, 90, 100, 110, 125 — — 3.75 (95) 2, 3
BQD 65 14 15-50, 60, 70, 80, 90, 100 — — — — 3.75 (95) 2, 3
BQD6 65 — 15-50, 60, 70 — 10 — — 3.75 (95) 2, 3
Special Application BL-HID 10 — 15, 20, 30 — — — — 3.75 (95) 2, 3
BL-BG 10 — 15, 20, 30 — — — — 3.75 (95) 2, 3
Ground Fault Circuit Interruptor BLE-GFCI 10 — 15, 20, 30, 40, 50, 60 — — — — 3.75 (95) 2
BLEH-GFCI 10 — 15, 20, 30, 40, 50, 60 — — — — 3.75 (95) 2
BLF-GFCI 10 — 15, 20, 30, 40, 50, 60 — — — — 3.75 (95) 2
BLHF-GFCI 10 — 15, 20, 30, 40, 50, 60 — — — — 3.75 (95) 2
Arc Fault CircuitInterruptor BAF-AFCI 10 — 15, 20 — — — — 3.75 (95) 2
BAFH-AFCI 10 — 15, 20 — — — — 3.75 (95) 2
BAFC-AFCI 10 — 15, 20 — — — — 3.75 (95) 2
BAFCH-AFCI 10 — 15, 20 — — — — 3.75 (95) 2

125

Thermal Magnetic

General Application

 NGB 100 25 15-60, 70, 80, 90, 100, 110, 125 — 14 — — 3.75 (95) 2, 3
HGB 100 35 15-60, 70, 80, 90, 100, 110, 125 — 14 — — 3.75 (95) 2, 3
LGB 100 65 15-60, 70, 80, 90, 100, 110, 125 — 14 — — 3.75 (95) 2, 3
NEB 85 — 15-60, 70, 80, 90, 100, 110, 125 35 22 — — 3.75 (95) 2, 3
HEB 100 — 15-60, 70, 80, 90, 100, 110, 125 65 25 — — 3.75 (95) 2, 3
ED4 65 — 15-60, 60, 70, 80, 90, 100, 110, 125 18 — — — 3.75 (95) 2, 3
HED4 100 — 15-60, 60, 70, 80, 90, 100, 110, 125 42 — — — 3.75 (95) 2, 3
HHED6 100 — 15-60, 60, 70, 80, 90, 100, 110, 125 65 — 18 — 3.75 (95) 2, 3
CED6 200 — 15-60, 60, 70, 80, 90, 100, 110, 125 200 — 100 — 3.75 (95) 2, 3
150 Electronic (Solid State) 3VA 3VA61-MDAE 100 35 1 35 18 18 — 5 (127)
3VA61-HDAE 100 65 1 65 22 22 — 5 (127)
3VA61-CDAE 200 100 1 100 35 35 — 5 (127)
3VA61-LDAE 200 150 1 150 50 50 — 5 (127)
150 Electronic (Solid State) VL ND 65 — 60, 100, 150 35 — 18 — 5 (127)
HD 100 — 60, 100, 150 65 — 20 — 5 (127)
LD 200 — 60, 100, 150 100 — 25 — 5 (127)

225

Thermal Magnetic

General Application

 QJ2 10 — 60-110, 125, 150, 175, 200, 225 — — — — 5 (127)
QJH2 22 — 60-110, 125, 150, 175, 200, 225 — — — — 5 (127)
QJ2H 42 — 60-110, 125, 150, 175, 200, 225 — — — — 5 (127)
QR2 10 — 100, 110, 125, 150, 175, 200, 225 — — — — 5 (127)
QR2H 25 — 100, 110, 125, 150, 175, 200, 225 — — — — 5 (127)
HQR2 65 — 100, 110, 125, 150, 175, 200, 225 — — — — 5 (127)
HQR2H 100 — 100, 110, 125, 150, 175, 200, 225 — — — — 5 (127)
  1. Reference breaker trip setting tables in Speedfax Section 7 – Molded Case Circuit Breakers
  2. 1 to 6 poles may be mounted in 3.75” of unit space. Interrupting Capacity Ratings Of Disconnect Devices 40
  3. Accessories such as shunt trips on three pole breakers require 6.25” of unit space

Ampere Rating

 Breaker Type Maximum IC (KAIC) Symmetrical Amperes Unit Spacein inches (mm)
Trip Type Frame Type Breaker Family 240V 480Y/277V Available Trip Values 480V 600Y/347V 600V Single Twin

250A

 Thermal Magnetic 3VA 3VA52-MFAS 3 85 35 100, 110, 125, 150, 175, 200, 225, 250 35 18 50 — 5 (127)
3VA52-HFAS 3 100 65 100, 110, 125, 150, 175, 200, 225, 250 65 25 85 — 5 (127)
3VA52-CFAS 3 200 100 100, 110, 125, 150, 175, 200, 225, 250 100 35 100 — 5 (127)
Electronic (Solid State) 3VA 3VA62-MFAE 1 100 35 2 35 18 18 — 5 (127)
3VA62-HFAE 1 100 65 2 65 22 22 — 5 (127)
3VA62-CFAE 1 200 100 2 100 35 35 — 5 (127)
3VA62-LFAE 1 200 150 2 150 50 50 — 5 (127)

250A

 Thermal Magnetic Sentron FXD6, FD6 65 — 70-110, 125, 150, 175, 200, 225, 250 35 — 22 — 5 (127)
HFXD6, HFD6 100 — 70-110, 125, 150, 175, 200, 225, 250 65 — 25 — 5 (127)
HHFXD6, HHFD6 200 — 70-110, 125, 150, 175, 200, 225, 250 100 — 25 — 5 (127)
CFD6 200 — 70-110, 125, 150, 175, 200, 225, 250 200 — 100 5 (127) —
Electronic (Solid State) VL NF 65 — 100, 150, 250 35 — 18 — 5 (127)
HF 100 — 100, 150, 250 65 — 20 — 5 (127)
LF 200 — 100, 150, 250 100 — 25 — 5 (127)

400A

 Thermal Magnetic Sentron JXD6, JD6 65 — 200, 225, 250, 300, 350, 400 35 — 22 — 8.75 (222)
HJXD6, HJD6 100 — 200, 225, 250, 300, 350, 400 65 — 35 — 8.75 (222)
HHJXD6, HHJD6 200 — 200, 225, 250, 300, 350, 400 100 — 50 — 8.75 (222)
CJD6 200 — 200, 225, 250, 300, 350, 400 150 — 100 8.75 (222) —

Electronic (Solid State)

 VL NJ 65 — 250, 400 35 — 25 — 6.25 (159)
Sentron SJD6 65 — 200, 300, 400 35 — 25 — 8.75 (222)
VL HJ 100 — 250, 400 65 — 25 — 6.25 (159)
Sentron SHJD6 100 — 200, 300, 400 65 — 35 — 8.75 (222)
VL LJ 200 — 250, 400 100 — 25 — 6.25 (159)
Sentron SCJD6 200 — 200, 300, 400 150 — 100 8.75 (222) —

600A

 Thermal Magnetic Sentron LXD6 65 — 450, 500, 600 35 — 25 8.75 (222) —
Sentron LD6 65 — 200, 300, 350, 400, 450, 500, 600 35 — 25 8.75 (222) —
Sentron HLXD6, HLD6 100 — 250, 300, 350, 400, 450, 500, 600 65 — 35 8.75 (222) —
Sentron HHLXD6, HHLD6 100 — 250, 300, 350, 400, 450, 500, 600 100 — 50 8.75 (222) —
Sentron CLD6 200 — 250, 300, 350, 400, 450, 500, 600 150 — 100 8.75 (222) —

Electronic (Solid State)

 VL NL 65 — 400, 600 35 — 25 6.25 (159) —
Sentron SLD6 65 — 300, 400, 500, 600 35 — 25 8.75 (222) —
VL HL 100 — 400, 600 65 — 25 6.25 (159) —
Sentron SHLD6 100 — 300, 400, 500, 600 65 — 35 8.75 (222) —
VL LL 200 — 400, 600 100 — 25 6.25 (159) —
Sentron SCLD6 200 — 300, 400, 500, 600 150 — 100 8.75 (222) —

800A

Thermal Magnetic

 VL NM 65 — 600, 700, 800 35 — 25 8.75 (222) —
Sentron MXD6, MD6 LMXD6, LMD6 65 — 500, 600, 700, 800 50 — 25 10 (254) —
VL HM 100 — 600, 700, 800 65 — 35 8.75 (222) —
Sentron HMXD6, HMD6 HLMXD6, HLMD6 100 — 500, 600, 700, 800 65 — 50 10 (254) —
VL LM 200 — 600, 700, 800 100 — 50 8.75 (222) —
Sentron CMD6 200 — 500, 600, 700, 800 100 — 65 10 (254) —

Electronic (Solid State)

 VL NM 65 — 600, 800 35 — 25 8.75 (222) —
Sentron SMD6 65 — 600, 700, 800 50 — 25 10 (254) —
VL HM 100 — 600, 800 65 — 35 8.75 (222) —
Sentron SHMD6 100 — 600, 700, 800 65 — 50 10 (254) —
VL LM 200 — 600, 800 100 — 50 8.75 (222) —
Sentron SCMD6 200 — 600, 700, 800 100 — 65 10 (254) —

1200A

Thermal Magnetic

 VL NN 65 — 800, 900, 1000, 1200 35 — 25 10 (254) —
Sentron NXD6 65 — 900, 1000, 1200 50 — 25 10 (254) —
VL HN 100 — 800, 900, 1000, 1200 65 — 35 10 (254) —
Sentron HNXD6, HND6 100 — 900, 1000, 1200 65 — 50 10 (254) —
VL LN 200 — 800, 900, 1000, 1200 100 — 65 10 (254) —
Sentron CND6 200 — 900, 1000, 1200 100 — 65 10 (254) —

Electronic (Solid State)

 VL NN 65 — 800, 1000, 1200 35 — 25 10 (254) —
Sentron SND6 65 — 800, 1000, 1200 50 — 25 10 (254) —
VL HN 100 — 800, 1000, 1200 65 — 35 10 (254) —
Sentron SHND6 100 — 800, 1000, 1200 65 — 50 10 (254) —
VL LN 200 — 800, 1000, 1200 100 — 65 10 (254) —
Sentron SCND6 200 — 800, 1000, 1200 100 — 65 10 (254) —
  1. 3VA62 breaker will be available in Fall 2019.
  2. Reference breaker trip setting tables in Speedfax Section 7 -Molded Case Circuit Breakers.
  3. 3VA52 breakers are available in additional DC ratings. Reference SpeedFax Section 7 – Molded Case Circuit Breakers for complete table.

Interrupting Capacity Ratings
Of Disconnect Devices

Type WL Insulated Case Breakers 1

Maximum Ampere Rating

Breaker Type

 Maximum Interrupting Capacity In Symmetrical RMS Amperes For Voltage AC
240V 480V 600V
800 S-Class 65,000 65,00 65,000
1200
1600
2000
800

L-Class

100,000

100,000

85,000
1200
1600
2000
2500
3000
4000
5000
4000 C-Class 150,000 150,000 100,000
5000

Bolted Pressure Switches All 600V AC Maximum 2 or 3 Poles 1

 Ampere Rating  Fuse Rating (Amperes) Fuse Interrupting Rating(Sym. RMS Amps)
400 3 400      200,000
600 3 600
800 600, 700, 800
1200 1000, 1200
1600 1500. 1600
2000 1800, 2000
2500 2500
3000 3000
4000 3500, 4000
5000 4 5000
6000 4 6000
  1. 100% rated device.
  2. 200,000A max. on 800A switch with “L” or “T” fuses and 1200A switch at
    240V with “L” fuses
  3. 400 and 600 amp fuses on Bolted Pressure Switches shall be Class J type only.
  4. 5000 and 6000A bolted pressure switch not UL listed.
  5. For use on 240V maximum system

Vacu-Break Fusible Switches

Maximum Ampere Rating  Fuse Class Maximum Interrupting Capacity in SymmetricalRMS Amperes, 240 to 600V AC  Fuse Holder
30to 600 H, K1, K5 10,000 NEC Standard
RK1, RK5 200,000 Class R Rejection Type
J 200,000 Rejection Type
8001200 L 100,000 2 —

HCP Fusible Switches

 Ampere Rating Fuse Class (Amperes) Fuse Interrupting Rating(Sym. RMS Amps)
J T 5 L
400 400 — —   200,000
600 600 — —
800 — 600, 800, 601, 800
1200 — 1000,1200 1000,1200

Surge Protective Devices

Surge Protection Device
The Siemens Surge Protection Device truly is designed for the entire electrical system. From the service entrance equipment to lighting panelboards, Siemens has a system that will meet or  xceed your specifications.

Installed at stages in your electrical system, the Siemens SPD protects sensitive equipment closest to where it is needed. Industry-first retrofit kits complete one of the finest voltage transient protection systems on the market.

Siemens SPD for Service Entrance Applications

Siemens SPD for Service Entrance Applications
Surge Protection Device

Surge Protection Device for Distribution Applications

Surge Protection Device

Ground Fault Protection

NEC Section 230.95 requires ground fault protection on all service disconnects rated 1000 amperes and larger in 600 volt class switchboards when fed by a solidly grounded Wye system of more than 150 volts to ground. Ground fault protection is required on 480 and 600 volt, 3-phase 3-wire, (i.e., no neutral bus), when the serving transformer is Wye connected.

There is an exception to this rule: Ground fault protection is not required on fire pumps or continuous industrial loads where a non-orderly shutdown would cause a hazard.

Health care facilities, such as hospitals require additional levels of ground fault protection. These requirements are described in NEC article 517.

Sections 215.10 and 240.13 of the NEC require ground fault protection on all 1000 ampere and larger devices, breakers, and switches, applied in a system as described above, unless there is ground fault protection upstream.

Many utilities use a grounded Wye secondary transformer and bring a connection from the grounded mid-point to the service section ground bar. When this is the case, ground fault protection is required.

For a 1000 ampere or larger 480 volt, 3-phase 3-wire service section, an inquiry should be made to determine if the utility is using a 3-wire delta secondary transformer. Should this be the case, no ground fault protection is required

Ground Fault Testing
Ground Fault Relay
Warning: The following should be performed only by qualified personnel as defined in N.E.C. Article 100. The ground fault sensor (GFS), ground fault relay (GFR), must be installed as in Fig.1.

See front connected switchboard installation manual in brochure’s section of the website for additional information (www.usa.siemens.com/switchboards).
Ground Fault Testing

  1.  Disconnect Main Power Source.
  2. Remove the neutral disconnect link. Make sure the neutral is grounded only by the main bonding jumper, which must be on the line side of the sensor.
  3. Close all branch devices.
  4.  Using a “megger” type meter, measure the resistance of the load phase and neutral to ground. This is to ensure that no ground connections exist in the system. Resistance readings of (1) Megohm or greater are preferred.
  5.  Re-install the neutral disconnect link.
  6.  Open all branch devices.
  7.  Connect the main power source.
  8. To Test The Entire System.
    a. Check for control power. (LED should be illuminated).
    b. Press the “push to test” switch on the relay.
    c. The trip indicator should go to the “tripped” position and the disconnect device should operate.
    d. Release the “push to test” switch and return the trip indicator to the “reset” position.
    e. Reset or “close” the disconnect device for normal operation of the switchboard.
  9.  This test meets the requirements of the National Electrical Code Section 230.95 (C).

Ground Fault Testing

Some Things To Consider

When Applying Switchboards
The electrical system is bound to have unique requirements that affect the design of the switchboard and the selection of the protective devices that go into it. However, some design aspects are common to all systems, and can be considered in more general terms.

Ampacity Should Anticipate Future
Load Requirements
In addition to meeting the demands of pre-set loads, the switchboard should be sized to accommodate reasonable future load additions without major modifications.
Expansion can usually be built into the switchboard easily. The main protective device frame size or continuous current rating, and the switchboard through-bus can be sized on the basis of anticipated future load demand. Trip units or fuses of lower ratings can be installed to meet preset load conditions and simply changed in the future as load increases, up to the maximum switchboard ratings.

Most protective devices are designed to operate continuously at 80% of their rating when installed in a switchboard. Bolted pressure switches, power circuit breakers, and some molded case breakers have been designed for operation at 100% of their current rating when housed in an adequately ventilated enclosure. However, since most protective devices are tested in a 40°C (104°F) ambient, derating may be necessary if the operating conditions normally exceed this temperature.

Selective Tripping
The switchboard and its protective devices must be capable of withstanding and interrupting the short circuit fault current that the electrical system can deliver to the switchboard’s location in the system.

In a fully rated system, both the main and branch feeder protective devices must have adequate interrupting capacity for the available fault current, and the switchboard bus should be braced for the same maximum fault current. Without selective tripping coordination between the main and branch protective devices, both the main and branch device may trip under fault conditions.

The NEC permits the application of series rated devices in switchboards. Series rated devices are those which have been series tested to prove that a higher rated upstream device will protect a lower rated downstream device. In the selective system though, the main and branch devices are selected so that under fault condition, the branch device normally clears the fault while the main remains closed. Only in unusual events, such as a fault of the main switchboard bus or a failure of the branch device to operate, would the main device trip. Service continuity is maximized by the selective trip design.

Circuit Breaker Selectivity
Selectivity between main and branch circuit breakers can be achieved up to the instantaneous trip setting by building a short-time delay into the main breaker trip characteristics, or properly choosing and setting instantaneous trip characteristics to allow the branch breaker’s instantaneous trip to clear the fault first. The short-time delay features are available on solid-state molded case circuit breakers, such as WL Insulated Case Breakers. With these breakers, a solid-state main breaker, and standard thermal-magnetic branch breakers can be combined to achieve an economical selective system.

Service Continuity Can Also Be Affected By Ground Fault Protection Design Ground fault protection is required by the National Electrical Code, Section 230.95 for solidly grounded Wye electrical services of more than 150 volts to ground, but not exceeding 600 volts phase-to-phase on each service disconnecting device rated 1000 amps or more, to provide protection against low magnitude arcing ground faults. While the National Electrical Code stipulates only that ground fault protection be provided on the main disconnect device, the switchboard designer should consider service continuity when applying ground fault protection. Ground fault protection can be achieved using ground fault relays, or integral ground fault in solid-state trip circuit breakers. Ground fault protection normally used on main disconnect devices have a pickup trip from 200 to 1200 amperes, and operating times from six to thirty cycles.

For services in which continuity of service is critical, ground fault protection is recommended on both the main and branch feeder devices. For hospitals, the National Electric Code, Section 517.17 requires this ground fault relaying on both the main and feeder circuits. A time coordinated scheme between the mainand branch devices will provide selective coordination to maintain continuity of servic

Enclosure Types
Type 1 enclosures are available for indoor applications and Type 3R for outdoor and wet locations. NEC Section 110.26(F) requires switchboards to be located in dedicated rooms and spaces. Sections 408.7 and 408.8 require placement to reduce to a minimum the probability of communicating fire to adjacent combustible materials including the floor. Section 110.26 defines specific working clearances and exit doors to the switchboard area.

Factory Testing
Prior to shipment each switchboard is tested to UL 891, the dead front switchboard standard. A dielectric test is conducted at two times the switchboard voltage rating plus 1000 volts. External device ground fault systems are tested at 57% control voltage to ensure operation under severe ground faults.

Note: NEC Section 230.95 requires the ground fault system to also be field tested by the installer and a permanent record kept of this test using the field test instructions provided with the switchboard.

Phase Arrangement
When viewed from the front bus phasing per NEC Section, 408.3, is A-B-C from front to back, top to bottom, and left to right. There is no industry standard on the location of the neutral.

On a 4-wire delta system, the B phase has the higher voltage to ground except the C phase may have the higher voltage to ground when metering equipment is present. The bussing that has the higher voltage to ground will be marked with orange colored labels.

Overcurrent Devices Continuous Rating Overcurrent devices are available with 80 and 100% continuous load ratings. The NEC defines a continuous load as maximum current for 3 hours or more

Device Type 80%Rated 100%Rated
Molded Case Circuit Breakers Yes Yes
Fusible Switches VB & HCP Yes N/A
Bolted Pressure Switches N/A Yes
WL Insulated Case CircuitBreakers N/A Yes

Maintenance and Installation
Each switchboard is provided with maintenance and installation instructions at the time of shipment. Energized switchboards are hazardous when all enclosure covers are not in place. To reduce the risk of injury follow the instructions and switchboard instructional labels. NEC Section 110.3(B) requires these instructions be followed.

Replacement Parts and Modification Kits 

Replacement Information, Accessories and Modifications

Connection Strap Kits – Circuit Breaker 1
For use with FC20, FCI, FCII, CDP-6 and VB-6 switchboards or series 5 or 6 CDP circuit breaker panelboards. Includes straps, cover plates and necessary hardware for switchboards, manufactured since 1974. For replacement strap kits for RCII switchboards, contact your local sales office.

Max Amp Rating Breaker Family Breaker Type Catalog Number 2 Unit Height (inches)

Mounting
100 General BL, BQD SBLBD 3.75 Twin
125 General EB SEBD 3.75 Twin
General xGB SNBD 3.75 Twin
General ED 6E62 3.75 Twin
General CED 6CLE2 3.75 Twin
150 VL DG SDGD 5.00 Twin
3VA 3VA61 S3VA52TD 6 5.00 Twin
225 General QJ 6QJ2 5.00 Twin
General QR 6QR2 5.00 Twin
250 VL FG SFGD 5.00 Twin
Sentron FD 6F62 5.00 Twin
Sentron CFD 6CLF1 5.00 Single
3VA 3VA52, 3VA62 7 S3VA52TD6 5.00 Twin

400

 VL JG SJG2D 3 6.25 Twin
VL JG SJG1D 6.25 Single
Sentron JD 6JJ61 8.75 Single
Sentron JD 6JJ62 8.75 Twin
Sentron CJD 6CLJ1 8.75 Single
Sentron SJD 6SJL1 8.75 Single
Sentron SCJD 6SCJ1 8.75 Single

600

 VL LG SLGD 8.75 Single
Sentron LD 6LL61 8.75 Single
Sentron CLD 6CLL1 8.75 Single
Sentron SLD 6SLL1 8.75 Single
Sentron SCLD 6SCL1 8.75 Single
800 VL MG MG1D 8.75 Single
Sentron LMD SLM1D 8.75 Single
Sentron MD SMND 10.00 Single
Sentron SMD SSMND 10.00 Single
1200 VL NG NG1D 10.00 Single
Sentron ND SMND 10.00 Single
Sentron SND SSMND 10.00 Single

Filler Plates 1
For use with FC20, FCI, FCII, CDP-6 and VB-6 switchboards or series 5 or 6 CDP circuit breaker panelboards. Includes straps, cover plates and necessary hardware for switchboards, manufactured since 1974. For replacement strap kits for RCII switchboards, contact your local sales office.

Breaker Frame Filler Plate Catalog Number Notes
BL, BQD, ED QF3 Per Pole
ED EBF1 Per Pole

Note: When a front filler plate is not completely filled with breakers, the openings in the unused space must be closed with 1-pole filler plates from table.

  1. Consult sales office for availability.Connecting strap kit includes front filler plate after 1/91.
  2. Siemens meter socks used in SMM switchboards.
  3. Siemens Type WMS263 Meter Sockets are rated 200A.
  4. To replace a QJ with a QR, only a new cover is needed up to 225A.
  5. To field install a single 3VA52, 3VA61 or 3VA62 breaker to an existing strap, provision kit #S3VA52PR is required.
  6. 3VA62 breaker will be available in Fall 2019.

Connection Strap Kits – Vacu-Break and HCP 1
For use with FC20, FCI, FCII, VB-5 and VB-6 switchboards. Includes straps, cover plates and necessary hardware for switchboards manufactured since 1974. For replacement strap kits for RCII switchboards, contact your local sales office.

Switch Type Ampere Rating Unit Height (inches) Catalog Number
Vacu-Break 30–30 5, 7.5

VB657
30–60 5, 7.5
60–60 5, 7.5
60–100 7.5
100–100 7.5
100 7.5
200 7.5, 10 VB671
200–200 10 VB610
400–600 15 VB6150
HCP 800–1200 16.25 F6162D

Blank Plates – Circuit Breaker and Fusible Switch 1
For use with FC20, FCI, FCII switchboards or series 5 or 6 CDP panelboards.

Unit Height (inches) Catalog Number
1.25 6FPB01
2.5 6FPB02
3.75 6FPB03
5 6FPB05
10 6FPB10

Replacement Meter Socket Kits 1 3 4
For use with SMM and SMD metering switchboards.

Type Catalog Number
1-Phase MSK2001
3-Phase MSK2003

Connecting Kits 1 3
For use with SMM and SMD metering switchboards

Disconnect Device Catalog Number
NGG SMMNGMK
EG SMMHEMK
BQ SMMBQMK
QJ SMMQJMK
QR SMMQRMK
ED SMMEDMK
FD SMMFDMK
CED SMMCEMK
T-Fuse Pullout SMMTFMK

Cover Plates 5
For use with SB1, SB2, SB3, FC20, FCI, FCII, CDP-6 and VB-6 switchboards or series 5 or 6 CDP circuit breaker panelboards.

Breaker Type Catalog Number
QR SQRC 5

Notes

Published by
Siemens Industry, Inc. 2020.

Siemens Industry, Inc.
5400 Triangle Parkway
Norcross, GA 30092

For more information, please contact
our Customer Support Center.
Phone: 1-800-241-4453
E-mail: info.us@siemens.com

usa.siemens.com/switchboards

Order No.: SWSA-07250D-0320
Printed in U.S.A.
© 2020 Siemens Industry, Inc.

The technical data presented in this document is based on an actual case or on as-designed parameters, and therefore should not be relied upon for any specific application and does not constitute a performance guarantee for any projects. Actual results are dependent on variable conditions. Accordingly, Siemens does not make representations, warranties, or assurances as to the accuracy, currency or completeness of the content contained herein. If requested, we will provide specific technical data or specifications with respect to any customer’s particular applications. Our company is constantly involved in engineering and development. For that reason, we reserve the right to modify, at any time, the technology and product specifications contained herein.

Documents / Resources

SIEMENS Switchboards Low Voltage Power Distribution [pdf] Installation Guide
Switchboards Low Voltage Power Distribution, Switchboards, Low Voltage Power Distribution, Power Distribution

References

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