Schneider Electric Square D HOM20M100C Homeline 100 Amp 20-Space 20-Circuit Indoor Main Breaker Load Center User Manual

1. Important Safety Information

WARNING: This product must be installed and serviced by qualified personnel only. Improper installation or maintenance can result in serious injury, death, or property damage. Always disconnect power at the main service panel before working on this equipment. Follow all local and national electrical codes.

• Always wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves.
• Verify that all circuits are de-energized before touching any wires or components.
• Do not install in wet or damp locations unless specifically rated for such environments.
• Ensure proper grounding and bonding as per electrical codes.
• Never bypass or modify safety devices.

2. Product Overview

The Square D Homeline HOM20M100C is a 100 Amp, 20-space, 20-circuit indoor main breaker load center designed for residential and light commercial applications. It features a single-phase, 3-wire, split neutral configuration, operating at 120/240 Volts AC. The unit includes a factory-installed 10,000 AIR main breaker (QOM1 main frame size) and is U.L. Listed for safety and performance.

Key features include a rugged bus bar, slot/square drive screws for secure connections, and a straight-in main design for simplified wiring. Tangential main service knockouts facilitate easy conduit entry. The device can be rotated 180 degrees to accommodate bottom feed applications. It accepts #4 - 2/0 AWG main wire and features a durable gray baked-on enamel finish.

Figure 1: Front view of the Square D HOM20M100C Homeline Load Center with the cover removed, illustrating the internal bus bar, breaker spaces, and wiring terminals.

3. Installation

3.1 Mounting

1. Select a suitable indoor location for the load center, ensuring it is easily accessible and free from moisture.
2. Securely mount the load center to a sturdy surface using appropriate fasteners. The enclosure provides multiple mounting points.
3. Ensure the load center is level and plumb before tightening all mounting screws.

3.2 Wiring Connections

Before proceeding, ensure all power to the installation site is disconnected at the utility service entrance.

• Main Service Wires: Route the main service entrance conductors through the tangential knockouts. Connect the two hot (phase) conductors to the main breaker terminals and the neutral conductor to the neutral bar. The load center accepts #4 - 2/0 AWG main wire.
• Grounding: Install a ground bar (e.g., Square D PK15GTA, sold separately) in one of the three available mounting locations. Connect the equipment grounding conductors to this ground bar.
• Branch Circuits: Install appropriate Square D Homeline circuit breakers (not included) into the designated spaces. Connect the hot wire of each branch circuit to its respective breaker terminal and the neutral wire to the neutral bar.
• Torque Specifications: Ensure all terminal screws are tightened to the torque specifications indicated on the load center label.
• Bottom Feed Configuration: If main service conductors are entering from the bottom, the entire device can be rotated 180 degrees to facilitate this configuration.

4. Operating Instructions

Once installation is complete and verified by a qualified electrician, and power has been restored:

• Main Breaker: The large main breaker controls all power to the load center. To turn off all power, switch the main breaker handle to the "OFF" position. To restore power, switch it to the "ON" position.
• Branch Circuit Breakers: Each smaller breaker controls a specific circuit. To turn off power to a single circuit, switch its breaker handle to the "OFF" position.
• Resetting a Tripped Breaker: If a circuit breaker trips (moves to an intermediate position), it indicates an overload or short circuit. To reset, first move the handle completely to the "OFF" position, then firmly push it to the "ON" position. If the breaker trips again immediately, do not attempt to reset it repeatedly; consult a qualified electrician to identify and resolve the underlying issue.

5. Maintenance

Regular inspection and maintenance by a qualified electrician can ensure the safe and reliable operation of your load center.

• Annual Inspection: Have a qualified electrician inspect the load center annually. This includes checking for loose connections, signs of overheating (discoloration), corrosion, and proper operation of circuit breakers.
• Cleaning: Ensure the area around the load center is kept clear and free of obstructions. If cleaning is necessary, disconnect all power and use a dry, non-conductive cloth to wipe down the exterior. Do not use liquids or sprays inside the panel.
• Cover Integrity: Ensure the load center cover is always securely closed to prevent accidental contact with live parts and to protect internal components from dust and debris.

6. Troubleshooting

Most issues related to a load center involve tripped circuit breakers. Always prioritize safety and consult a qualified electrician for complex or persistent problems.

7. Specifications

8. Warranty and Support

For specific warranty information, please refer to the documentation included with your purchase or visit the official Schneider Electric website. For technical support, product inquiries, or to locate a certified service provider, please contact Schneider Electric customer service directly.

Schneider Electric Contact Information:

• Official Website
• Refer to product packaging for customer service phone numbers.