QO load centers offer premium features by allowing QO breakers, ground arc fault interrupters arc fault interrupters and surge arresters to be installed inside QO load centers enable the use of a full complement of accessories. Systems can be single or three phase and have indoor and outdoor versions. Indoor enclosures are designed to rotate 180 degrees to accommodate top or bottom service entrance feed which saves expensive service cable. QO load centers feature plated copper bus, providing superior performance and durability. This value pack QO load center contains a main breaker and is rated at 100 A single phase. This system provides 32 spaces in a NEMA 1 enclosure. Five QU120 circuit breakers come with this value pack load center. A combination cover is supplied with this load center. This load center is UL Listed.