QO® Circuit Breaker Load Centers, QO2TR, from Square D® are Underwriters Laboratories (UL) Listed and CSA rated panelboards. They are designed to meet residential, commercial, and industrial requirements to protect electrical systems, equipment, and people. The short circuit current rating of the enclosed circuit breakers is equal to the rating of the circuit breaker installed unless otherwise noted. This is a Powerpact H and J Circuit Breaker enclosure can accept 3 pole circuit breakers that has a current rating of 15-250A and is NEMA 1 enclosure. This enclosure is for powerpact H and J frame breakers. This product comes with an 18 month warranty.