Integrated Power Center 2 (IPC2™)

Section 1: Introduction

This bulletin provides instructions for the proper installation, operation, and maintenance of Square D® Integrated Power and Control Solutions (IPaCS) Integrated Power Center 2 (IPC2™) equipment manufactured by Schneider Electric. Engineering, installation, and operating staff supervisors should familiarize themselves with this bulletin and the equipment's characteristics.

These instructions apply to IPC2 installations by Schneider Electric. Special features or non-standard components will have detailed instructions included separately.

Each IPC2 is inspected and packaged at the assembly plant, with structural and electrical checks performed for compliance with specifications, codes, and standards. Factory order number, identification number, and shipping weights are marked on each shipping block.

Contact your nearest Schneider Electric field office to replace lost or damaged wiring diagrams and instruction sheets, using the factory order number as a reference.

Section 2: Safety Precautions

• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices (See NFPA 70E).
• This equipment must be installed and serviced only by qualified personnel.
• Perform work only after reading and understanding all instructions in this bulletin.
• Turn off all power supplying this equipment before working on or inside it.
• Before performing visual inspections, tests, or maintenance, disconnect all sources of electric power. Assume all circuits are live until de-energized, tested, and tagged. Consider all power sources, including backfeeding.
• Always use a properly rated voltage sensing device to confirm power is off.
• Handle this equipment carefully to ensure proper function. Neglecting installation and maintenance requirements may lead to personal injury or equipment damage.
• Disconnect the neutral connection at any TVSS or other electronic device before performing electrical insulation resistance tests; reconnect after testing.
• Inspect your work area and remove any tools or objects left inside the equipment.
• Replace all devices, doors, and covers before turning on power.
• All instructions assume these measures are taken before maintenance or testing.

Failure to follow these instructions will result in death or serious injury.

Section 3: Receiving, Handling, and Storing

Receiving

Upon receipt, check the packing list against the equipment to ensure completeness. Immediately inspect IPC2™ shipping blocks for transit damage. If damage is found or suspected, file a claim with the carrier and notify Schneider Electric. Claims for shortages or errors must be made in writing within 60 days of delivery. Failure to do so constitutes unqualified acceptance.

Delivery to a carrier constitutes delivery to the purchaser, regardless of freight payment and title. All risk of loss or damage passes to the purchaser at that time. Refer to Schneider Electric "Terms and Conditions of Sale" for claim details.

Handling

Ensure proper equipment, such as an overhead crane, is available at the installation site. The shipping weight of each block is on the packing list; verify the lifting capacity of the equipment used. Keep the IPC2 upright during handling.

Schneider Electric recommends using an overhead crane, lifting angles, and cables or chains for NEMA 1 enclosed IPC2. Alternative methods are discussed below.

Handling NEMA 1 IPC2™ Enclosures with Lifting Angles

Schneider Electric provides lifting angles as standard equipment for NEMA 1 enclosed IPC2™ shipping blocks. Instruction labels on each block outline their proper use. Use rigid spreaders or a spanner bar for vertical lift to prevent frame or finish damage.

Figure 1: Lifting with an Overhead Crane, Lifting Angles, and Cables or Chains
Diagram showing proper lifting of the IPC2 enclosure using an overhead crane with a spreader beam and lifting angles. The side view indicates a minimum 45-degree angle between lifting cables/chains and the equipment top.

Follow these instructions:

1. Use load-rated cables or chains with safety hooks or shackles. Do not pass cables or chains through lifting angle holes.
2. Use a load-rated spreader beam to prevent structure damage. Rig so the minimum angle between lifting cables/chains and equipment top is 45 degrees.

Lifting Warning Labels

Figure 2: Lifting Warning Labels, IPC2 and Switchboards
Illustration of warning labels attached to the IPC2 enclosure. Labels are in English, Spanish, and French, warning against lifting from certain sides and indicating forklift access points.

Handling NEMA 3R Enclosures or NEMA 1 IPC2™ Enclosures with Drip Hoods

Rollers or slings may be used. For elevating without lifting angles, an overhead crane with load-rated chain or wire cable with safety hooks/shackles can be used. Wrap the sling completely around the IPC2™ and shipping stringers.

Figure 3: IPC2 in Sling Rigging
Diagram illustrating the use of slings and a spanner bar to lift the IPC2 enclosure, emphasizing the need for a 45-degree minimum angle and avoiding lift holes.

A forklift is an alternative handling method.

Figure 4: Forklift Safety Strap
Diagram showing a forklift safely lifting the IPC2 enclosure, secured with a safety strap, with forks extending under the entire unit.

NOTE: Always check fork lengths to ensure they extend under the entire IPC2. Balance the load carefully and use a safety strap.

Storing

When storing the IPC2™ before installation, cover the top and openings to protect from dust and debris. If not installed immediately, store in a clean, dry space with consistent temperature to prevent condensation. Store indoors if possible, preferably in a heated building with adequate air circulation. Protect from dirt, fumes, water, and physical damage. Outdoor storage may cause harmful condensation.

NOTE: Install portable electric heaters (approx. 250 watts per vertical section) in indoor or rainproof IPC2 enclosures for storage protection.

Before energizing heaters, remove loose packing or flammable materials. Outdoor IPC2 is not weather-resistant until fully installed.

Section 4: Installation

Correct installation is essential for proper IPC2 operation. Study instruction books and drawings carefully. Drawings are usually sent to the purchaser before shipment for advance planning.

NOTE: Do not use the top of the IPC2 as a support for the installer's weight.

Location

Designate the installation area on the building floor plan. The location must provide working clearances per NEC Section 110-26 or CEC Part 1, Section 2-308. IPC2 equipment requires field connections (mains, branches, ground bus) to be accessible and maintainable from the front.

Foundation Preparation

The floor or foundation must support the IPC2 weight without sagging. The surrounding floor area should slope gently toward a drain.

NOTE: For seismic qualifications, read "Anchoring the IPC2™ for Seismic Qualifications" on page 18 before pouring the floor or foundation.

IPC2 equipment is assembled on true and level floors. Ensure the mounting pad or final site is smooth and level for correct alignment with adjoining equipment. If parallel steel floor channels are imbedded, ensure they are level to avoid IPC2 structure distortion.

When pouring the foundation, make provisions for conduits entering from below for incoming/outgoing cables, control wiring, and ground cable. The equipment drawing's bottom view shows the available conduit area.

Conduits should project about 2.00 in. (51 mm) above the finished floor. To simplify moving shipping blocks, install conduits flush with concrete and add extension sleeves later. Otherwise, raising the block on timbers or using a crane will be necessary.

NOTE: Before pouring the foundation, consider installing additional conduits for future circuits.

IPC2™ Preparation

• Remove dirt and debris from the foundation and surrounding area before moving the IPC2™ into final position.
• After moving to the final site, remove each shipping block from its shipping stringers.
• Remove all packing materials.

General Installation

Install the IPC2 by leveling each section progressively and bolting frames together. Position shipping sections as follows:

1. Maneuver each section into position using "Handling" procedures (page 6).
2. Carefully lower the equipment over conduit stubs to match the "available conduit area." Otherwise, cable bending space may be insufficient.
3. Level the shipping section.
4. After each section is installed, make the ground bus splice connection to the preceding section before installing the next.

Joining Shipping Sections—Indoor IPC2 and Switchboards

1. Position each adjacent section, leveling and aligning it with the previous one.
2. Open or remove front and rear doors/panels for access to bolt sections together.
3. Six bolts (3/8-16 x 1 inch) are provided. Place them through existing holes in the front and rear vertical corner channels to join sections.
4. Make ground bus splice connections to the preceding section (See "Ground Bus Splice Connections Between IPC2™ and Power-Style® QED Switchboards" on page 14).
5. Replace and secure all front and rear doors and panels.

Figure 5: Indoor IPC2™
Diagram of an indoor IPC2 section, highlighting the bolt locations on the front and rear vertical corner channels used for joining adjacent sections.

Joining Shipping Sections—Outdoor IPC2™ and Switchboards

1. Remove the center top cap from the left-hand section, retaining hardware.
2. Open or remove front and rear doors/panels for access to bolt sections together.
3. Remove three 0.50-in. (13 mm) diameter knockouts from the front vertical corner channel and three from the rear vertical corner channel (six per frame side).
4. Position each section, leveling and aligning it with the previous one.
5. Six bolts (3/8-16 x 1 inch) are provided. Place them through the holes created in step 3 to join sections. Secure each bolt with a washer and nut until finger-tight.
6. Make ground bus splice connections to the preceding section (See "Ground Bus Splice Connections Between IPC2™ and Power-Style® QED Switchboards" on page 14).
7. Replace the center top cap.
8. If applicable, replace and secure all removed doors and panels.

Figure 6: Joining Adjacent Sections—Outdoor IPC2 and Switchboards
Diagram illustrating the joining of outdoor IPC2 sections, showing the center top cap, knockouts, and hardware details for connecting adjacent units.

Ground Bus Splice Connections Between IPC2™ and Power-Style® QED Switchboards

Align and secure the ground bus splice connection between sections. Torque connections to 100 lb-in (11 N•m).

NOTE: Proper installation is essential for equipment ground-fault systems.

Figure 7: Ground Bus Splice Connection
Close-up diagram of a ground bus splice connection between IPC2 sections, showing the 1/4-20 thread-forming hardware.

IPC2 Connection to Indoor Integrated Power Center (IPC) and Modular Panelboard System (MPS)

Integrated Power Center (IPC) and IPC2 Enclosure Splice

Preparing the IPC2™

NOTE: Before joining shipping blocks, ensure the IPC equipment is installed per the Integrated Power Center instruction bulletin no. 80043-056-.

1. Remove dirt and debris from the foundation and surrounding area before moving the IPC2 enclosure into its final position.
2. After the IPC2 enclosure has been moved to its final installation site, take the equipment off its shipping stringers.

Joining Shipping Sections

1. Remove side covers from the IPC2™ enclosure to access the vertical support. Open or remove front doors of the IPC to access side panels.
2. Position the IPC2 enclosure and IPC sections adjacent to one another, leveling and aligning the rear of each section.

Figure 8: IPC2 and IPC Shipping Sections
Diagram showing how to join IPC2 and IPC shipping sections, illustrating the alignment of vertical supports and bolt locations.

3. Locate and move any factory-installed cables through side openings into appropriate sections.
4. Bolts (1/4-20 x 1 inch), washers, and nuts are provided. Seven sets of hardware join the sections. Align splicing holes in the front of the IPC side panel with corresponding holes in the IPC2 vertical support.
5. Place bolts through holes in the IPC2 vertical support and IPC side panels to join sections. Secure each bolt with a washer and nut until finger-tight.
6. Torque hardware to 72 lb-in (8 N•m).
7. Connect factory-installed cables per Table 2 (page 31).
8. Replace side covers on the IPC2 enclosure.

Making Ground Cable Splice Connections

1. Align and secure the ground cable connection between IPC shipping sections per the Integrated Power Center instruction bulletin.

NOTE: Proper installation is essential for equipment ground-fault systems.

2. Locate the ground lug on the ground bar in the IPC2 enclosure.
3. Place the stripped end of the ground cable from the IPC sections into the lug on the IPC2™ ground bar.
4. Torque the ground cable connection per Table 2 (page 31).
5. Replace the IPC door and reinstall side covers if not already completed.

Figure 9: Ground Splice Connection
Diagram of a ground splice connection, showing the ground cable being connected to the ground bar within the IPC2 enclosure.

Modular Panelboard System (MPS) and IPC2™ Enclosure Splice

Preparing the IPC2

NOTE: Before joining shipping blocks, ensure the MPS equipment is positioned in its final location.

1. Remove dirt and debris from the foundation and surrounding area before moving the IPC2 enclosure into its final position.
2. After moving to the final installation site, take the equipment off its shipping stringers.

Joining Shipping Sections

1. Remove side covers from the IPC2™ enclosure to access the vertical support. Remove front covers of the MPS to access side panels.
2. Position the IPC2 enclosure and MPS sections adjacent to one another, leveling and aligning the rear of each section.

Figure 10: IPC2 and MPS Shipping Sections
Diagram illustrating the joining of IPC2 and MPS shipping sections, showing alignment of vertical supports and bolt locations.

3. Locate and move any factory-installed cables through side openings into appropriate sections.
4. Bolts (3/8-16 x 1 inch), washers, and nuts are provided in the MPS structure. Four sets of hardware join the sections. Align splicing holes in the front of the MPS side panel with corresponding holes in the IPC2 vertical support.
5. Place bolts through holes in the IPC2 vertical support and MPS side panels to join sections. Secure each bolt with a washer and nut until finger-tight.
6. Torque hardware to 72 lb-in (8 N•m).
7. Connect factory-installed cables per Table 2 (page 31).
8. Replace side covers on the IPC2 enclosure.

Making Ground Cable Splice Connections

1. Run ground cable from the MPS ground bar to the IPC2 enclosure ground bar.

NOTE: Proper installation is essential for equipment ground-fault systems.

2. Locate the ground lug on the ground bar in the IPC2 enclosure.
3. Place the stripped end of the ground cable into the lug on the IPC2™ ground bar.
4. Torque the ground cable connection per Table 2 (page 31).
5. Replace the MPS covers and reinstall IPC2 side covers if not already completed.

Figure 11: Ground Splice Connection
Diagram of a ground splice connection, showing the ground cable connection for MPS to the IPC2 ground bar.

Anchoring the IPC2™ for Seismic Qualifications

IPC2 equipment certified as seismic has been qualified to site-specific seismic requirements. Optional features may be needed based on location and codes. Seismic certificates of compliance are provided with seismically-certified IPC2 equipment. Follow installation instructions to maintain certification validity.

Responsibility for Mitigation of Seismic Damage

IPC2™ equipment is considered nonstructural building components per model building codes. Capacity was determined by tri-axial seismic shake table tests (AC156). An equipment importance factor of 1.5 was used, indicating verification of functionality before and after testing. This factor is relevant for critical facilities. AC156 is published by ICC ES and recognized by BSSC as appropriate methodology in the 2003 NEHRP Commentary.

Incoming and outgoing cable and conduit must be designed and restrained to withstand seismic forces without increasing load transfer to the equipment. Bottom entry/exit of cable and conduit is preferred where seismic hazard exists. This system must transfer loads to the building's structural system.

Seismic qualification by Schneider Electric is one part of ensuring equipment integrity after a seismic event. The equipment must transfer loads to the building's structural system.

The structural civil engineer or design engineer is responsible for detailing equipment connection and anchorage requirements. Installers and restraint system manufacturers ensure mounting requirements are met. Schneider Electric is not responsible for specification or performance of these systems.

Maintaining Seismic Certification

Anchoring IPC2 for Seismic Applications

Formed base channels provide .75-in. (19mm) diameter holes for fastening to the floor. Use all four mounting locations. Use ½-in. (12.7mm) diameter anchor bolts (Grade 5 minimum). Use one 1.25-in (31.75 mm) outer diameter Grade 5 belleville washer (Square D part no. 23903-33201) under the head of each bolt or anchor nut. Torque hardware per anchor manufacturer or seismic restraint detailing.

Additionally, NEMA 1 enclosed sections have two rear top-located lifting angles with a 1.25-in. (31.75 mm) diameter hole for upper structural restraint.

Top structural restraint is required if:

• Site-specific 0.2 second spectral ground motion exceeds 2.67 g's, or
• Displacement at the top of the equipment cannot be tolerated.

Figure 12: IPC2 Base Channels
Diagram of the IPC2 base channels, indicating the .75-in. (19 mm) or 1.12-in. (28 mm) diameter holes used for anchoring the section to the floor.

Anchoring the IPC2™

To develop full strength of the upper structural anchor, install and torque hardware as specified by the anchor manufacturer or seismic restraint detailing. NOTE: Most anchoring hardware is not furnished, except for the Grade 5 belleville washer.

After joining sections and bolting the structure to the floor, install incoming service conductors and load side cables. During an earthquake, the top of the IPC2 can move; top incoming cables must accommodate this motion. The IPC2 enclosure should not be used to mount exterior equipment.

Although sections are freestanding, bumps or shifting can damage splice joints and conduit hubs. Each vertical section must be anchored to the floor.

Formed base channels have .75 in.- (19mm) or 1.12-in. (28 mm) diameter holes for anchoring. Anchor each section with ½-in. diameter (Grade 2 minimum) bolts, flat washers, and suitable anchors.

Grounding and Bonding

After sections are joined and bolted to the floor, install incoming service conductors and load side cables.

NOTE: A system is "grounded" if it is grounded at any point ahead of the IPC2, whether the grounded conductor (neutral) is carried through to the loads or not.

Service Equipment—Grounded System

For solidly grounded systems used as service equipment or a main IPC2 on a separately derived system:

• Run a grounding electrode conductor from the grounding electrode to the connector (ground lug) on the IPC2™ ground bus. Comply with NEC Sections 250-62, 250-66, 250-64 or CEC Sections 10-204, 10-206, 10-908.
• Install the main bonding jumper (provided with IPC2) between the neutral assembly of the service entrance panelboard and a ground lug on the IPC2 unit ground bus. Torque values are in Table 2 (page 31).

NOTE: If the IPC2 is fed from multiple sources (e.g., double-ended systems), there may be two or more main bonding jumpers.

In Canada, a main bonding jumper cable is provided. If disconnection is required (e.g., for a Megger® test), remove the cable lug from the neutral assembly and secure it to maintain distance from phases and neutral.

NOTE: For multiple sources (e.g., main-tie-main), two or more main bonding jumpers may be installed.

Service Equipment—Ungrounded System

For ungrounded systems used as service equipment or a main IPC2 on a separately derived system:

1. Run a grounding electrode conductor from the grounding electrode to the connector (ground lug) on the IPC2 ground bus.
2. Select material and size per NEC Sections 250-62, 250-66 or CEC Sections 10-700, 10-702, and install per NEC Section 250-64 or CEC Section 10-204.

Not Service Equipment

For systems not used as service equipment or a main IPC2 on a separately derived system:

• Use equipment grounding conductors sized per NEC Section 250-122 or CEC Section 10-206 to connect the IPC2 frame and ground bus to the service ground.

High-Impedance Grounded Neutral Systems

Ground the system per instructions with the system grounding equipment and NEC Section 250-36. Confirm IPC2 frame and ground bus bonding per NEC Section 250-102.

Figure 13: Grounding Electrode Connector
Diagram showing the connection of the grounding electrode conductor to the ground lug on the IPC2 ground bus.

Conduit Area

1. Locate and terminate all conduit in the IPC2 enclosure within the "available conduit area."
2. When cables enter the top, remove the IPC2 top plate and retain hardware.
3. Add cutouts in the top plate as needed. Ensure no metal shavings fall into the IPC2.
4. Re-install the top plate and secure it with retained hardware.

Cable Pulling

IPC2 units are constructed to customer specifications for cable entrance arrangements. Components are arranged for proper cable clearance and bending space as specified on the equipment drawing.

1. Use only cable sizes suitable for corresponding lugs.
2. Pull the correct number of line and load side cables per the load served and NEC/CEC.
3. Position cables inside the IPC2 to prevent physical damage.
4. Maintain maximum bending radii and clearance to bus bars and grounded parts. Support cables lying on structural members or use protective material. If routing feeder cables through the Transformer Combo compartment, ensure no direct contact with transformer core or coils. Use cable support brackets.
5. Run all phase conductors, including neutral, through the same opening where cables enter/leave, or pass through magnetic material. Otherwise, overheating may occur (See NEC Section 300-20(a)).
6. When instructed, brace or cable-lace conductors.

Cable Terminations

1. Use a proper insulation stripping tool to strip cable ends to fit the lug barrel length. Avoid nicking strands.
2. Clean aluminum cable contact surfaces with a wire brush or abrasive cloth to remove oxides and foreign matter.
3. Immediately apply an acceptable joint compound to bare aluminum surfaces.
4. If compression-type lugs are furnished, unbolt and remove them for crimping. Insert the cable, make specified crimps, wipe excess compound, remount lugs, and torque bolts per "Section 9—Torque Values" (pages 31-32).
5. Set screw-type lugs are common for main incoming lugs and circuit breakers. Torque to specified values (do not exceed). Torque values for circuit breaker lugs are marked on the units; other IPC2™ lugs are marked on the IPC2.

Ground-Fault Protection for Equipment

According to NEC Section 230-95(c), the ground-fault protection system shall be performance tested when first installed, with a written record available to the authority having jurisdiction.

Schneider Electric tests the factory-installed system before shipment. However, improper grounding at the job site will defeat the system. Performance testing requires injecting sufficient current to test the ground fault, including sensor polarity, interconnection wiring, and neutral bonding.

NOTE: Some equipment ground-fault systems require field connections. Consult the IPC2 interconnection wiring drawing.

Section 5: Pre-Energizing Checkout Procedure

Conduct a complete inspection before energizing the IPC2™ to ensure proper function. Complete every step of the checkout procedure before energizing.

1. Check ground bus bar connections (torque values in Table 2, page 31).
2. Check all accessible connections for tightness.
3. Check all factory- and field-installed lug terminations for tightness.
4. Check the IPC2 enclosure for dents or damage affecting electrical clearances.
5. Remove all foam blocks or temporary cushioning material from electrical devices.
6. Manually open and close all switches, circuit breakers, and operating mechanisms, checking alignment and free operation.
7. Operate electrically operated switches and devices with remote operators (not under load). An auxiliary control power source may be needed.
8. Check all relays, meters, and instrumentation for proper field-installed wiring connections and device function.
9. Current transformers (CTs) require connection to a metering device load before energizing. Verify the metering device load is properly connected, including IPC2 connections to remote equipment.
10. All CT circuits supplied by Schneider Electric for customer metering are shorted for shipment. Remove shorting terminal screws or jumpers and store them.
11. Factory-installed molded case circuit breakers (250 A frames or larger) may have an adjustable magnetic trip, shipped on "LO." Markings between "LO" and "HI" represent 5–10 times the continuous current rating. Adjust magnetic trip as outlined in the respective instruction bulletin for coordinated operation. All poles adjust simultaneously.
12. For IPC2 units with electronic trip circuit breakers, set the tripping characteristic curve per job requirements or the instruction bulletin.
13. If ground-fault protection is furnished on molded case circuit breakers, refer to "Section 11—Reference Publications" (page 34) for circuit breaker publications.
14. Inspect all cables to ensure insulation is not damaged.
15. Verify all grounding connections are correct. If IPC2 is a service entrance, double-check the main bonding jumper connection.
16. Conduct an electrical insulation resistance (Megger®) test to ensure the IPC2™ is free from short circuits and undesirable grounds.
• Open all control power and metering disconnects or remove fuses from control circuits.
• Disconnect neutral at any TVSS or other electronic device before testing; reconnect after.
• With neutral isolated from ground and power switches/breakers open, conduct tests (phase-to-phase, phase-to-ground, phase-to-neutral, neutral-to-ground). If resistance is less than one megohm, the system may be unsafe; consult Square D Services (US: 1-888-778-2733, Canada: 1-800-265-3374).
17. Record resistance values (See "Section 10—IPC2™ Power Center Insulation Resistance Chart" on page 33).
18. After insulation resistance testing, replace control power fuses and close power disconnects.
19. Check all field-installed wiring for clearance from live parts and secure it to withstand fault currents if instructed. NOTE: MG-, MJ-, P-, and R-frame breakers require cable lacing; follow provided instructions.
20. Verify all control wiring between sections is connected.
21. Vacuum to remove dust, scrap wire, or debris.
22. Replace all covers; check for pinched wires, and close doors. Ensure all enclosure parts are aligned and fastened.

Figure 14: Instantaneous Trip Setting
Close-up of a circuit breaker face, pointing out the 'Magnetic trip adjustment' dial, used for setting instantaneous trip values.

Section 6: Energizing the IPC2™

1. No load should be on the IPC2 when energized. Turn off all downstream loads.
2. Energize the IPC2 in the following sequence:
1. Turn on all control power disconnects before energizing the IPC2. Refer to record drawings for control power disconnects.
2. Close any open doors and/or covers.
3. Close the main device(s).
4. Close each branch circuit breaker or branch fusible switch.
5. Proceed to each panelboard and other downstream load.
3. After all overcurrent protective devices are closed, turn on all loads (e.g., lighting circuits, contactors, heaters, motors).

Section 7: Maintaining the IPC2™

Periodic maintenance includes cleaning, lubrication, and exercising component parts. The interval can vary; maximum recommended inspection is one year. This definition applies throughout unless noted.

Always inspect the IPC2 after a fault (Refer to "Section 8—Adverse Circumstances", page 29). Service bulletins for devices mounted in the IPC2 are available through your local Schneider Electric field office.

General Inspection and Cleaning

1. Turn off all power supplying this equipment before working on or inside it.
2. Always use a properly rated voltage sensing device to confirm all power is off.
3. Vacuum the IPC2 interior to remove dirt or dust. Wipe bus bars, insulators, cables, etc., with a clean, dry, lint-free cloth.

4. Check IPC2™ interior for moisture, condensation, or signs of wetness. Moisture can cause insulation failures and oxidation. Inspect conduit entrances and panel cracks for leaks. Condensation in conduits must not drip onto live parts. Eliminate moisture and seal leaks.
5. Inspect IPC2 for signs of overheating (discoloration, flaking, cracking). Inspect cable insulation within the Transformer Combo compartment. NOTE: If overheating occurs, correct the cause; loose or contaminated connections can cause it.
6. Check for rodent nesting. Use an exterminator in the general area. NOTE: Do not use exterminating substances inside the IPC2.
7. Inspect devices for visibly worn, cracked, or missing parts.
8. Manually open and close switches and circuit breakers to verify operation.
9. Verify all locking mechanisms are working properly.

Panel Bus Bar Joints, Lug Terminations, and Insulating Materials

1. Do not retighten panel bus bar joints after the pre-energizing checkout.
2. Check bus bar joints and terminal lugs for pitting, corrosion, or discoloration from high temperatures or fault conditions. If damaged, contact Square D Services. If cleaning is required, use Lectra-Clean®.
3. Inspect insulating materials. Replace insulators with visible damage (cracks) before re-energizing.

General Lubrication Information

For field maintenance re-lubrication of bus/plug-on connections, use Schneider Electric catalog number PJC7201 (Electric Joint Compound).

Automatic Transfer Switches

Consult manufacturer's bulletins for installation, operation, and maintenance instructions.

Circuit Breakers

Schneider Electric circuit breakers are totally sealed units requiring minimal maintenance. Exercise them annually.

For general maintenance:

1. Trip the circuit breaker using the Push-To-Trip or "Open" button. Refer to the breaker bulletin for location.
2. Manually open and close the breaker two to three times.

NOTES:

• Schneider Electric bulletin 0600DB9901 "Field Testing and Maintenance Guide for Micrologic® Electronic Trip and Thermal-magnetic Molded Case Circuit Breakers" provides more information. Refer to "Section 11—Reference Publications" (page 34) and contact your local field office.
• Refer to individual circuit breaker instruction bulletins for maintenance, changing ratings, or removal. If bulletins are unavailable, see "Section 11—Reference Publications" and contact your local field office.

The universal test set, Schneider Electric catalog number UTS3, tests Micrologic® trip units. Test modules store data for automatic tests. Series B Micrologic requires CBTMB; Masterpact® and Powerpact® require UTS3 or handheld set (533594).

NOTE: Tests can be done with the breaker installed in the IPC2; de-energize the IPC2.

Ground-Fault Protection for Equipment

Check terminal connections annually for tightness and corrosion. Testing procedures are in device bulletins. If the system can be tested without tripping, follow those directions. Otherwise, testing will trip the device. Replace damaged sensors or relays.

Section 8: Adverse Circumstances

This section covers electrical components of the IPC2™.

NOTE: Before re-energizing after an adverse circumstance, contact Square D Services for special instructions.

Other Manufacturers' Devices

Consult manufacturers' bulletins for installation, operation, and maintenance instructions.

Inspection Following a Short Circuit

Short circuit currents can cause mechanical and thermal stress, potentially damaging conductors and insulation. Inspect the entire system for damage. Check the overcurrent protection device for arcing damage.

Do not open sealed devices (e.g., molded case circuit breakers); replace if damaged. Fill unused breaker spaces before energizing.

Clean-up Following a Short Circuit

Organic insulating materials may deteriorate during an electrical arc. If so:

1. Remove soot or debris.
2. Replace carbon-tracked insulation.

Water-Soaked Equipment

Do not clean or repair an IPC2™ exposed to large volumes of water or submerged. Components may be damaged beyond repair. Do not energize. Contact Square D Services.

Water-Sprayed or Splashed Equipment (Clean Water Only)

If sprayed or splashed with small amounts of clean water, inspect for conductor or insulation damage. Do not open sealed devices; replace if damaged. Refer to "Section 11—Reference Publications" (page 34).

Inspection and Clean-up of Clean Water Sprayed or Splashed Equipment

Follow these steps only if:

• No signs of physical damage are present.
• IPC2 has not been submerged or exposed to water for long periods.
• Water contact was with clean water, not contaminated with sewage, chemicals, etc.
• Water has not entered areas with wiring above live parts.

If any conditions are not met, contact Square D Services.

1. Turn off all power supplying this equipment before working on or inside it.
2. Always use a properly rated voltage sensing device to confirm all power is off.
3. Disconnect and electrically isolate the IPC2 so no contact can be made with energized parts.
4. Wipe off moisture from panel bus, insulators, and insulating material with a clean, dry, lint-free cloth. Do not use cleaning agents or water displacement sprays.
5. Prepare IPC2 for insulation resistance (Megger®) testing by disconnecting line-side supply and load-side cable connections.
6. Turn all circuit breakers or switches to the ON position. The IPC2 must remain de-energized.
7. Use a megohmmeter (500–1,000 Vdc) and apply voltage from:
   • phase-to-ground with circuit breaker on
   • phase-to-phase with circuit breaker on
8. Record resistance values (See "Section 10—IPC2™ Power Center Insulation Resistance Chart" on page 33).
9. If resistance measurements are less than 1.0 megohm, call Square D Services.
10. If resistance measurements are greater than 1.0 megohm, energize using "Section 6—Energizing the IPC2™" (page 26) procedures.

Section 9: Torque Values for Electrical Connections

Hardware Description

Carriage bolt, Hex nut, Conical washer

Carriage bolt, Conical washer assembly (Keps nut)

Hex head bolt, Conical washer assembly (Keps nut)

Section 10: IPC2™ Power Center Insulation Resistance Chart

Always use a 500 or 1,000 Vdc megohmmeter when testing insulation resistance.

NOTE: The Neutral–Ground column is for recording pre-energizing checkout results only.

Section 11: Reference Publications

Schneider Electric publications are available through your local Schneider Electric field office. These include device replacement procedures and spare parts listings.

Contact your nearest Schneider Electric field office for information (US: 1-888-Square D (1-888-778-2733), Canada: 1-800-265-3374) or visit the Technical Library at http://ecatalog.squared.com/techlib/.

For NEMA documents, write to:

National Electrical Manufacturers Association (NEMA)
Attention: Customer Service
1300 North 17th Street
Suite 1847
Rosslyn, VA 22209