Section R. 408.41732 - Electrical equipment used in hazardous locationsRule 1732.
(1) Electrical components and equipment used in a hazardous location shall have an approved label for the specific hazardous location.(2) All screws, gaskets, and threaded connections shall maintain a vapor tight, dust tight, or fiber tight condition as required by the type of hazard class.Mich. Admin. Code R. 408.41732