Square D EDB26100 Miniature Circuit Breaker

The Square D EDB26100 has a 100A current rating. Use that rating to coordinate circuit overcurrent protection with conductor ampacity and load requirements.

The interrupting ratings are 14kA at 600Y/347VAC, 18kA at 480Y/277VAC, and 25kA at 240VAC. Use the rating for your system voltage and confirm that available fault current does not exceed it. The Y voltage ratings apply to wye systems, not straight-voltage delta systems.

The thermal element provides long-time protection against sustained overcurrent, while the magnetic element provides instantaneous protection against high fault current. Both settings are fixed, so select the breaker for the required protection rather than planning to adjust its trip settings.

The load-side box lug accepts 14-2/0 AWG copper or 12-2/0 AWG aluminum. Choose a conductor within the range for its material, then size it for the circuit's ampacity requirements; terminal acceptance alone does not determine conductor ampacity.

Use 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. Select the torque by conductor size and apply it with a torque tool to make the electrical connection correctly.

Bolt-on mounting uses a bolted connection rather than a plug-in connection. Plan the installation around securing that connection as part of mounting the breaker.

HACR means heating, air conditioning, and refrigeration. The HACR rating is relevant when selecting overcurrent protection for those applications; also match the breaker’s electrical ratings to the circuit requirements.

The trip indicator helps distinguish a protective trip when troubleshooting an interrupted circuit. Investigate the cause of the trip before resetting the breaker.

The thermal trip is calibrated at 40°C. Use that reference temperature when evaluating thermal-trip behavior, since ambient heat affects the thermal element's response to overcurrent.