Square D EGB34080 Miniature Circuit Breaker

This E-frame bolt-on breaker is exclusively designed for use in Square D NF series panelboards. It mounts directly to the panelboard bus and is not compatible with standard QO, NQ, or I-Line load centers.

Yes. While its maximum voltage rating is 480Y/277VAC with a 35kAIC rating, it is also fully rated for 240VAC and 120VAC systems. At those lower voltages, the interrupting capacity increases to 65kAIC.

For the standard AL100FD lugs supplied on this breaker, tighten 14 to 10 AWG wire to 35 lb-in, and 8 to 2/0 AWG wire to 50 lb-in.

These three 3-pole 80A breakers share the same physical dimensions and fit the same Square D NF panelboards, but they offer different interrupting capacities at 480Y/277VAC. The EDB34080 is rated for 18kAIC, the EGB34080 is rated for 35kAIC, and the EJB34080 provides 65kAIC.

The "LI" designation indicates a thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) protection. The Long-Time thermal function protects against sustained overloads, while the Instantaneous magnetic function trips immediately during short circuits. Both trip thresholds are fixed on the EGB34080.

Yes, this EGB series breaker is HACR (Heating, Air Conditioning, and Refrigeration) rated. This certifies it for use in HVAC equipment motor group applications to protect the equipment and the branch circuit wiring.

The factory-installed mechanical lugs accept copper (Cu) wire ranging from 14 AWG up to 2/0 AWG, or aluminum (Al) wire from 12 AWG up to 2/0 AWG.

Yes. When installing E-frame breakers in a Square D NF panelboard, the combined current rating of the breakers mounted directly opposite each other on the same bus connector must not exceed 170 Amps. For example, you can mount this 80A breaker opposite another breaker rated up to 90A, but no larger.