Ratings Classifications

When evaluating products for use in industrial environments, it is important to determine whether the manufacturer is “self-certifying” or whether the products have undergone outside testing and certification. The National Electrical Manufacturers Association (NEMA) provides a rating system to classify industrial enclosures based on their ability to protect users from internal electronics and internal electronics from the external environment. Rating classifications and their definitions are listed below for both UL and NEMA.

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