Raintight, feed-through load center with cover. 200 amp main breaker included. 8 spaces for adding additional outside circuits such as a water pump circuit or a circuit feeding a storage shed. Can be expanded to 16 maximum circuits using QO Tandem breakers. UL (Underwriter's Laboratories) listed for residential, commercial, and industrial power distribution. Built with a shielded, copper bus bar that is plated for reliability. Tested and listed only for QO circuit breakers. Engineered for fast installation and wire savings.