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 such as combination covers which are included here. 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 QO Load Center contains a main breaker and is rated at 200 A and 1 phase. This system provides 60 spaces in a NEMA 1 enclosure and is plug on neutral ready. A combination cover is supplied with this load center. This 1 phase load center has 60 spaces and 72 circuits. This system provides a 200A convertible main breaker in a NEMA 1 enclosure. It also includes plug on neutral, combination cover, and is UL rated.