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what is
NEMA does not certify products. NEMA is an electrical industry trade association focusing on the development of product standards, government affairs, and market economics. The standards for enclosure NEMA ratings and the types of conditions that must be met are set by the National Electrical Manufacturers Association. The testing in the United States is typically done by UL or another certifying lab and there are specific tests and procedures that UL508 establishes for each rating.
PTM Published on: 2018-10-03