NSN 5925-00-728-2020

An enclosure which includes, mounts, and protects one or more circuit breakers. It is designed for and may include a cover and such accessories as mounting hardware, brackets, and conduit fittings. May include terminal boards and/or bus conductors used as a convenience for terminating the circuit breakers. May include handle tie bars. It is usually used as a load center for the protection of certain electrical devices such as water heaters, motors, etc., or as a service center for homes or offices. For boxes which include only switches, jacks, fuseholders, terminals and/or terminal boards or fuseholders, or any combination of these devices, see switch box; jack box; terminal box; and distribution box. For boxes designed to mount and protect but do not include circuit breakers, see circuit breaker box subassembly. See also interconnecting cabinet; panel, power distribution; junction box; and cabinet, electrical equipment.