ABB / General Electric THHQL2170 Molded Case Circuit Breaker

This breaker is designed for use in GE PowerMark Gold load centers, GE A-Series panelboards, and ABB ReliaHome load centers that accept 1-inch Q-Line plug-on breakers.

The primary difference is the interrupting capacity. Standard THQL breakers have a 10kAIC rating, while THHQL breakers feature a higher 22kAIC rating. Both share the same 1-inch per pole physical footprint and plug-on mounting style.

Yes, it is suitable for reverse feed applications. However, when installed as a back-fed main, the National Electrical Code requires it to be secured with an approved main breaker retainer kit, such as the THQLRK series, specific to your load center.

The box lugs on this 70-amp breaker accept 6 AWG to 1/0 AWG copper wire, or 4 AWG to 1/0 AWG aluminum wire. Always torque the terminals to the manufacturer specifications printed on the breaker label.

As a standard full-size Q-Line breaker, it requires two adjacent 1-inch spaces, taking up a total of 2 inches of width in the panel.

Yes, this breaker is HACR rated, making it suitable for protecting heating, air conditioning, and refrigeration equipment circuits that require a 70-amp overcurrent device.

No, the THHQL2170 is a standard thermal-magnetic breaker. It provides long-time and instantaneous trip functions for overload and short-circuit protection, but it does not include built-in AFCI or GFCI circuitry.