QO generator panels are for the manual transfer from utility to generator power. QO generator panels are for back-up power applications. This sub-panel connects directly to the main load center and provides four single pole spaces that will accommodate up to eight circuits dedicated for back-up power. This QO generator panel uses two factory installed, two pole QO circuit breakers. One is fed by the utility, while the second circuit breaker is back-fed to the back-up power source, such as a generator. Power source switching is easy. Simply turn the main power breaker to the "OFF" position and then turn the generator fed breaker to the "ON" position. A factory installed mechanical interlock prevents both main breakers being in the "ON" position at the same time. This NEMA 1 enclosure with a surface cover with a door is for indoor applications. This panel has a 30A rating and a 10 kA short circuit current rating. The lugs will accept 14 AWG to 8 AWG copper or aluminum wire. This QO generator panel has a height of 12.57 inches, a width of 8.88 inches and a depth of 3.80 inches. This generator panel is UL Listed.