QO Load Centers offer premium features like QO breakers, ground arc fault interrupters and surge arresters. QO load centers are designed for residential and industrial use to protect electrical systems, equipment and people. Systems are single or three phase and have indoor and outdoor versions. QO Load Centers enable the use of a full complement of accessories. Indoor enclosures are designed to be rotated 180 degrees to accommodate top or bottom service entrance feed. This QO load center NEMA 1 indoor gray surface cover is for a load center with 40 spaces. The grey load center cover has a height of 33.78 inches, a width of 14.25 inches and a depth of 0.70 inches.