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 flush mounting load center cover with a wide gutter is painted white. This cover is for an indoor load center rated NEMA 1 with 20 spaces. The load center cover is 22.13 in H x 15.44 in W x 0.7 in D. This cover must be purchased in multiples of 100.