Square D EGB24090 Molded Case Circuit Breaker

This E-frame breaker is designed specifically for use in Square D NF series panelboards. It bolts directly to the busbar of the NF interior.

The tightening torque depends on the wire size used. For 14 to 10 AWG wire, torque the lugs to 34.5 lb-in. For 8 to 2/0 AWG wire, torque the lugs to 49.6 lb-in.

The EGB24090 is a bolt-on circuit breaker. It features captive mounting screws that thread directly into the tapped holes on the branch connectors of the panelboard interior.

Yes. While it has a maximum voltage rating of 480Y/277VAC with a 35kAIC interrupting capacity, it is also fully rated for 120/240VAC and 240VAC systems, where it provides a higher interrupting rating of 65kAIC.

Yes, this E-frame breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific designation.

Yes, Square D E-frame breakers like the EGB24090 feature a Visi-Trip visual indicator. When the breaker trips due to an overcurrent or short circuit, the handle snaps to a center position and a highly visible red indicator appears to help quickly identify the tripped breaker.

The primary difference is their interrupting rating (AIC) at 480Y/277VAC. EDB breakers are standard interrupting (18kAIC), EGB breakers are high interrupting (35kAIC), and EJB breakers are extra-high interrupting (65kAIC). They share the same physical footprint and panelboard compatibility.

No. The EGB24090 is an E-frame breaker designed exclusively for Square D NF series panelboards, which operate at up to 480Y/277VAC. NQ panelboards are designed for QO and QOB breakers operating at 240VAC maximum.

The LI designation indicates that the breaker's thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The Long-Time function protects against sustained overloads, while the Instantaneous function provides immediate tripping during a short circuit.

No additional mounting kits are required. The EGB24090 is a bolt-on breaker that mounts directly to the busbar of a Square D NF panelboard using the captive screws built into the breaker's branch connectors.