NEMA 250
NEMA Enclosure Ratings Explained: 1, 3R, 3, 3X, 4, 4X, 6, 12 and 13, IP Equivalents, and Which Rating Each Location Needs
What each NEMA 250 enclosure type protects against, the nearest IP equivalent, why IP and NEMA do not convert exactly, and a location table for disconnects, junction boxes, combiners and controls indoors, outdoors, in washdown and in corrosive sites.
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