Circuit Breaker Installation for Homeline™ Combination Service Entrance Devices

Introduction

Retain for future use.

Homeline™ Combination Service Entrance Devices are designed to restrict the installation of more overcurrent devices than that number for which it was designed. Be advised that the plug-on connection arrangement for HOMT circuit breakers is different from HOM circuit breakers.

⚠ DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462 or NOM-029-STPS.
• This equipment must only be installed and serviced by qualified electrical personnel.
• Turn off all power supplying this equipment before working on or inside equipment.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors and covers before turning on power to this equipment.

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

Double Row Bus Construction

Tandem circuit breaker type HOMT may be installed in combination service entrance devices where the bus bar connector has a slot at the centerline of the desired pole space. See Figure 1.

⚠ NOTICE

HAZARD OF EQUIPMENT DAMAGE

Do not use excessive force to install a HOMT tandem circuit breaker where no connector slot is provided. See Figure 1.

Failure to follow this instruction can result in damage to the circuit breaker case.

Figure 1: HOM or HOMT Circuit Breaker

Diagram showing a circuit breaker angled for connection. It features plug-on jaws at the top, a wire terminal, and a bus bar connection at the bottom. The bus bar connection is labeled as 'Rejects HOMT' for the HOM type, and has a 'Connection Slot' for the HOMT type. A mounting hook is also visible.

Figure 2: HOM Circuit Breaker

Diagram showing a HOM circuit breaker angled for connection. It features a wire terminal and a bus bar connection at the bottom, with a mounting hook. The bus bar connection is explicitly labeled as having 'No Connection Slot for HOMT'.

Note: Tighten all electrical connections to specifications. See lug torque data chart on combination service entrance device wiring diagram for torque specifications. See circuit breaker marking for lug torque specifications.

Single Row Bus Construction

Tandem circuit breaker type HOMT may only be installed in combination service entrance devices where the bus bar connector has a configuration as shown in Figure 3.

Failure to follow this instruction can result in equipment damage.

⚠ NOTICE

HAZARD OF EQUIPMENT DAMAGE

Tandem circuit breaker type HOMT may only be installed in combination service entrance devices where the bus bar connector has a configuration as in Figure 3.

Failure to follow this instruction can result in equipment damage.

Figure 3: HOM or HOMT Circuit Breaker

Diagram showing a circuit breaker angled for connection. It features plug-on jaws at the top, a wire terminal, and a bus bar connection at the bottom. The bus bar connection is labeled as 'Rejects HOMT' for the HOM type, and has a 'Connection Slot' for the HOMT type. A mounting hook is also visible.

Figure 4: HOM Circuit Breaker

Diagram showing a HOM circuit breaker angled for connection. It features a wire terminal and a bus bar connection at the bottom, with a mounting hook. The bus bar connection is explicitly labeled as having 'No Connection Slot for HOMT'.

Note: Tighten all electrical connections to specifications. See lug torque data chart on combination service entrance device wiring diagram for torque specifications. See circuit breaker marking for lug torque specifications.

Figure 5: HOM Circuit Breaker Dimensions

Diagrams illustrating the dimensions of HOM circuit breakers in inches (mm). The HOM one-pole breaker is approximately 1.98 inches (50mm) high and 0.99 inches (25mm) wide. The HOM two-pole breaker is approximately 1.98 inches (50mm) high and 1.73 inches (44mm) wide.

Figure 6: HOMT Circuit Breaker Dimensions

Diagrams illustrating the dimensions of HOMT circuit breakers in inches (mm). The HOMT Tandem breaker is approximately 1.55 inches (39mm) high and 0.98 inches (25mm) wide. The HOMT Quad breaker is approximately 1.55 inches (39mm) high and 1.97 inches (50mm) wide.

Remove Cover Twistouts

• Remove only those twistouts which match installed circuit breakers by twisting out with pliers at the center of twistout.
• Close unused circuit breaker openings with filler plates.
• Order catalog number HOMFP for filler plates. Each filler plate closes one-pole branch circuit breaker opening.

Figure 7: Remove Cover Twistouts

Illustration showing a hand using pliers to twist and remove a knockout tab from an electrical panel cover.

Prepare for Installation

1. Remove knockouts. Appropriate to knockout pattern, drive center knockout inward or outward. Alternately pry up or drive in outer rings one at a time to opening required.

Figure 8: Remove Knockouts

Sequence of illustrations demonstrating the removal of knockouts from an electrical enclosure. The first shows a knockout tab. The second shows a tool (like a screwdriver) being used to pry it. The third shows the knockout removed, creating an opening.

2. Select the proper cable clamp, or use other approved methods for securing the cable or conduit to the enclosure.
3. Install and wire branch circuit breakers.

⚠ CAUTION

HAZARD OF EQUIPMENT DAMAGE

Use only Homeline™ circuit breakers and replacement parts with this product. Use of other components voids the warranty, may void the UL listing and may result in personal injury or equipment damage. Refer to device markings for specific restrictions.

Failure to follow this instruction can result in personal injury or equipment damage.

Circuit Breaker Installation

1. Turn off circuit breaker.
2. Insert wire terminal end of circuit breaker into mounting hook.
3. Push circuit breaker inward until plug-on jaws plug securely on to bus bar connector.
4. Install wires.

Identify Circuits

Identify branch circuits on directory label or directory stickers.

Energize the Circuit

Note: Before energizing combination service entrance devices, turn main and branch circuit breakers to the OFF position.

1. Turn on power to the combination service entrance device.
2. Turn main circuit breaker ON.
3. Turn on branch circuit breakers.

Handle at mid position indicates the circuit breaker is tripped. To reset, move handle to the off position and then to the on position.

Figure 9: Energize the Circuit

Diagrams of a circuit breaker handle showing three states: ON (up position), OFF (down position), and Tripped (middle position). A note indicates that to reset a tripped breaker, move the handle to OFF, then to ON.

Removal of Circuit Breakers

1. Turn circuit breakers OFF.
2. Remove wires.
3. Disconnect plug-on jaws from bus bar connection by pulling circuit breaker outward until it disengages from mounting hook.