ANSI UL 458 - Enclosures Used for Protected Environments; Atomized Water Test

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7 Enclosures Used For Protected Environments
7.1 A protected environment enclosure provided for compliance with 28.1.1 shall be constructed so as to
protect the internal parts of the appliance against conductive contaminants and shall comply with the
Atomized Water Test, Section 51.
Exception: A part that is uniformly coated or completely encapsulated need not be subjected to the
Atomized Water Test.
7.1 effective April 13, 1993
7.2 A protected environment enclosure may be provided by means of an enclosure that is:
a) Hermetically sealed;
b) Provided with gasketed, tight fitting joints and doors or covers;
OCTOBER 15, 2004UL 45816