Rittal s atex and iec rated enclosures are available in several key sizes for zones 1 and 2 or 21 and 22 to 94 9 ec standards. The national electrical manufacturers association nema is a standards organisation in washington usa which publishes a number of technical standards but does not test or certify products itself. Enclosures feature certified protection durable components nema protection ratings are ensured through a secure locking system foamed in place gasket and knife edge perimeter.
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