Explosion Proof enclosures are capable of withstanding an internal explosion without letting the flames, fumes, or gases from exiting the enclosure.

The "explosion-proof" term is assigned to products certified by national rating agencies such as Underwriters Laboratories and Factory Mutual Research after meeting their specifications and passing their tests.  Unless certified by one of these agencies, the product does not meet the "explosion-proof" requirements of the National Electrical Code.

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