QO Generator Panels help with your backup power applications. These sub-panels connect directly to the main load center. They provide four single pole spaces that will accommodate up to eight circuits. The Generator Panels use two factory installed, two pole QO circuit breakers. One breaker is fed by the utility, while the second breaker is back-fed for the back-up power source. A factory installed mechanical interlock prevents both main breakers being in the ON position at the same time. Generator Panels are available in 30 A and 60 A versions. QO Generator Panels enable the use of a full complement of accessories. This 1 phase generator panel has 4 spaces and 8 circuits. This system provides 50A main breaker with interlock in a NEMA 3R enclosure. It also includes a ground bar, and is UL rated.