ABB / General Electric THQL32040 Miniature Circuit Breaker

The recommended lug tightening torque depends on the wire gauge you are installing. For 8 AWG wire, torque the terminals to 40 in-lb. For 6 to 4 AWG, torque to 45 in-lb. For 3 AWG, the maximum torque is 50 in-lb.

No. While they may physically fit onto the bus bars of some competing 1-inch load centers, GE THQL breakers are not UL listed for use in Siemens, Square D, or Eaton panels. They must only be installed in compatible GE or ABB panels to maintain UL compliance and ensure safe operation.

Yes. Following ABB's acquisition of GE Industrial Solutions, THQL series breakers like the THQL32040 are fully compatible with legacy GE Powermark load centers as well as current ABB ReliaGear panels that accept standard 1-inch plug-on breakers.

The THQL32040 has an interrupting capacity of 10kAIC at 240V, which is standard for most residential and light commercial panels. The THHQL32040 shares the exact same form factor but features a higher interrupting rating of 22kAIC for applications that require greater fault current protection.

Yes. The box lug load terminals on this breaker are rated to accept 8 to 3 AWG wire for both copper (Cu) and aluminum (Al) conductors. Always use an approved oxide inhibitor when terminating aluminum wiring.

Yes. It is rated for a maximum of 240VAC, which makes it fully compatible with 240V Delta and 208Y/120V three-phase electrical systems.

Yes. Like most modern GE Q-Line breakers from 15 to 100 amps, the THQL32040 is UL Listed as an HACR type. This means it is rigorously tested and approved for use with heating, air conditioning, and refrigeration equipment.

Yes. This thermal-magnetic breaker is suitable for reverse feed applications, making it an option for back-feeding a panel from a secondary power source, such as a solar inverter or generator tie-in, provided a hold-down kit is used if required by local code.