Luminaire Requirements in Class II, Division 2 Locations

Luminaires for fixed lighting in Class II, Division 2 locations shall be equipped with enclosures that are _____ or otherwise identified for the location.

a) dust-ignitionproof
b) dusttight
c) dustproof
d) explosionproof

See answer and applicable Code reference

The correct answer is: b) dusttight

Article 502 covers the requirements for electrical equipment and wiring installed in Class II, Division 1 and 2 locations. As noted in Sec. 502.130(B)(2), luminaires for fixed lighting installed in Class II, Division 2 locations shall be provided with enclosures that are dusttight or otherwise identified for the location.

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