Siemens Q215 Miniature Circuit Breaker

Yes. Siemens Type QP breakers like the Q215 are the official UL-listed replacements for legacy Murray MP-T and ITE EQ-P circuit breakers. They are authorized for use in older Murray and ITE load centers that originally required these breaker types.

No. Siemens QP breakers are only UL-listed for use in approved Siemens, Murray, and legacy ITE load centers. They are not interchangeable with Eaton, Square D, GE, or other competitive brands.

Yes. Because standard Siemens Type QP breakers are not marked with Line and Load, they can be back-fed. However, the National Electrical Code requires the breaker to be mechanically secured to the panel bus with an approved Siemens hold-down bracket when used as a back-fed main.

Yes. While the Q215 accepts both copper and aluminum wire, standard industry practice dictates applying an approved antioxidant joint compound to aluminum conductors before termination. Additionally, aluminum wire requires a larger minimum gauge (12 AWG) compared to copper (14 AWG) for this specific breaker.

Yes. This breaker carries an HACR (Heating, Air Conditioning, and Refrigeration) rating, meaning it is tested and approved to handle the unique inrush currents and motor loads commonly found in HVAC systems.

No. The Q215 is a standard thermal-magnetic breaker, meaning it does not require a neutral connection. It simply snaps onto the hot bus bars and is fully compatible with both traditional pigtail and newer plug-on neutral load centers.

Standard molded case circuit breakers are rated for 80% continuous duty. The maximum continuous load on the Q215 should not exceed 12 amps (80% of its 15-amp rating) for any single load operating for 3 hours or longer.