Square D EGB34125 Molded Case Circuit Breaker

While E-Frame breakers are the standard branch circuit breakers for NF series panelboards, the EGB34125 can also serve as a merchandised main breaker in Square D NQ panelboards when installed with the appropriate main breaker kit.

These models share the same physical footprint and 125A rating but offer different interrupting capacities at 480Y/277VAC. The EDB34125 is rated for 18kA, the EGB34125 for 35kA, and the EJB34125 for 65kA.

When securing conductors in the standard lugs, tighten 14 AWG to 10 AWG wire to 34.5 lb-in (3.9 N-m). For larger 8 AWG to 2/0 AWG wire, apply 49.6 lb-in (5.6 N-m) of torque. Always verify with the factory label prior to installation.

No. This breaker has a slash voltage rating of 480Y/277VAC. Slash-rated breakers are strictly restricted to solidly grounded Wye systems where the voltage to ground does not exceed 277V. They are not approved for ungrounded or corner-grounded Delta configurations.

Yes, this thermal-magnetic breaker is suitable for reverse feeding and can act as a main breaker. However, National Electrical Code (NEC) rules require that any back-fed main breaker must be secured to the panel bus with a factory-approved retaining kit.

Yes, this breaker carries a Heating, Air Conditioning, and Refrigeration (HACR) rating. This certifies it for use with motor group loads commonly found in commercial HVAC systems.