29 CFR 1926.432 - Environmental deterioration of equipment.
(i) In damp or wet locations;
(iii) Where exposed to excessive temperatures.
(b)Protection against corrosion. Metal raceways, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, fittings, supports, and support hardware shall be of materials appropriate for the environment in which they are to be installed.