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What is the difference between NEMA 4X and Type 4X?

Sometimes those term can be often misunderstood. Usually, automation products are certified by UL and UL gives the certification as Type 4X.
UL is not involved with the verification of NEMA, which is another organism (National Electrical Manufacturers Association).
Technically, these are the same requirements, BUT Automation products are Type 4X indoor but NOT NEMA 4x.

For Automation products the UL certification should be Type 4x. For electrical enclosure it is NEMA 4x.
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