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Shannon Pelky 11 Comments

NEMA and UL Ratings Equivalency Chart

In the US, the two main organizations who set electrical safety standards for electrical enclosures are NEMA (National Electrical Manufacturers Association) and UL (Underwriters Laboratories). Although the standards for each enclosure type are independent from each other, the protection expectations are mostly the same. UL ratings are often described in more technical language, but after reviewing the summarized protections in the "NEMA and UL Ratings Equivalency Chart" below, you’ll quickly see that the enclosure protection expectations are almost identical.

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