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NEMA ratings for enclosuresNEMA ratings for enclosuresThe National Electrical Manufacturers’ Association (NEMA) issues guidelines and ratings for an enclosure’s level of protection against contaminants that might come in contact with its enclosed equipment. NEMA 3, NEMA 3R, NEMA 4, NEMA 4X and NEMA 12 There are many numerical NEMA designations, including: NEMA 3, NEMA 3R, NEMA 4, NEMA 4X and NEMA 12.
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