WAC 296-307-36421. Installing equipment in wet locations

(1) Cabinets, cutout boxes, fittings, boxes, and panelboard enclosures in damp or wet locations must be installed to prevent moisture or water from entering and accumulating within the enclosures. In wet locations the enclosures must be weatherproof. (2) Switches, circuit breakers, and switchboards installed in wet locations must be enclosed in weatherproof enclosures.