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 QO Load Center contains a main breaker and is rated at 150 A and 1 phase. This system provides 30 spaces in a NEMA 3R enclosure and is hub ready. Load center is plug on neutral ready. This 1 phase load center has 30 spaces and 30 circuits. This system provides a 150A convertible main breaker in a NEMA 3R enclosure. It also includes plug on neutral and is UL rated.