Square D EGB26100 Miniature Circuit Breaker

Select it when the circuit requires 100A overcurrent protection. Coordinate that rating with the calculated load and conductor ampacity.

The 600Y/347VAC rating applies to a grounded-wye AC system. Check both the system voltage and grounding configuration when selecting the breaker.

Use the interrupting rating for the circuit voltage: 18kA at 600Y/347VAC, 35kA at 480Y/277VAC, or 65kA at 240VAC. The available fault current at the installation point must not exceed the applicable rating.

The thermal-magnetic mechanism provides long-time protection for sustained overcurrents and instantaneous protection for high-current faults. Both the thermal and magnetic settings are fixed, so selection must account for the load's operating and starting characteristics.

The box lugs accept copper conductors from 14-2/0 AWG and aluminum conductors from 12-2/0 AWG. Select conductor size by circuit ampacity requirements as well as the terminal wire range.

Apply 34.5 lb-in (3.9 N·m) for 14-10 AWG conductors and 49.6 lb-in (5.6 N·m) for 8-2/0 AWG conductors. Choose the torque by conductor size and use a torque tool to tighten the box-lug connection.

HACR refers to heating, air-conditioning, and refrigeration applications. This rating supports selection where the equipment calls for a HACR-rated breaker, alongside the required current, voltage, and interrupting ratings.

The trip indicator gives a visual indication that the breaker has tripped. Use it to recognize a protective operation and investigate the cause before resetting.

The thermal trip is calibrated at 40°C, making that temperature the reference for its thermal response. Consider the installation temperature when evaluating overload behavior.