The Ringless Underground Metered Temporary Power Outlet Box is factory-assembled and factory-tested. It comes to the construction job site ready to use with no need to assemble individual parts, saving installation time. The single, heavy-gauge NEMA 3R rainproof enclosure protects against weather, vandalism and nuisance tripping. It is lockable and is engineered for maximum protection of receptacles, cords, plugs, breakers. The unit complies with National Electrical Code and OSHA requirements.