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 18 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 2 A and 1 phase. This system provides 4 spaces in a NEMA 1 enclosure and it is Plug-on neutral load center. CQO load centers are CSA certified.