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Underwriters Laboratory(UL) Definitions - Dry | Damp | Wet Locations

Definitions
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Underwriters Laboratory Definitions
The Difference Between Dry, Damp, and Wet Locations
(from UL Standard Publication 1598)
Dry Locations: A location not normally subject to dampness, but may include a location subject to temporary dampness, as in the case of a building under construction, provided ventilation is adequate to prevent an accumulation of moisture.
Damp Locations: An exterior or interior location that is normally or periodically subject to condensation of moisture in, on, or adjacent to, electrical equipment, and includes partially protected locations.
Wet Locations: A location in which water or other liquid can drip, splash, or flow on or against electrical equipment.

A wet location luminaire shall be constructed to prevent the accumulation of water on live parts, electrical components, or conductors not identified for use in contact with water.

A luminaire that permits water to enter the luminaire (during the rain test of Clause 13.5.2 or the sprinkler test of Clause 13.5.3) shall be provided with a drain hole.


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