Square D EGB34020 Miniature Circuit Breaker

These breakers share the exact same 20A, 3-pole E-frame physical footprint but offer different maximum interrupting ratings at 480Y/277VAC. The EDB34020 is rated at 18kAIC, the EGB34020 is rated at 35kAIC, and the EJB34020 provides the highest rating at 65kAIC.

No. E-frame circuit breakers like the EGB34020 are exclusively designed for bolt-on installation in Square D NF panelboards. NQ panelboards require QO or QOB format miniature circuit breakers.

No. The 480Y/277VAC slash rating indicates this breaker is approved only for solidly grounded wye systems where the line-to-ground voltage does not exceed 277VAC. It cannot be used on 480V ungrounded or corner-grounded delta electrical systems.

Yes, this circuit breaker is HACR labeled, meaning it is certified by UL for safe application with heating, air conditioning, and refrigeration equipment that generate high inrush currents during motor startup.

The standard load terminal lugs on this breaker should be tightened to approximately 30 lbf-in for both copper and aluminum conductors sized between 14 AWG and 6 AWG. Always verify with the physical breaker label for exact torquing limits prior to commissioning.

The compatible handle padlock attachment is catalog number HPAFD. This field-installable accessory allows the breaker handle to be locked in either the ON or OFF position for standard safety and lockout protocols.

No, the standard EGB34020 provides thermal-magnetic overload and short-circuit protection only. If your application requires 30mA equipment ground fault protection (EPD), you must source the EGB34020EPD variant instead.

When the EGB34020 trips due to an overcurrent or short-circuit, the handle moves to a center tripped position and a high-visibility red Visi-Trip indicator appears in the breaker window. This allows electricians to quickly identify the faulted circuit in a fully populated panelboard.