UL Type Ratings
Type Rating Underwriters Laboratory Inc.
Type 1 Indoor use primarily to provide a degree of protection against limited amounts of falling dirt.
Type 3 Outdoor use primarily to provide a degree of protection against rain, sleet, windblown dust, and damage from external ice formation.
Type 3R Outdoor use primarily to provide a degree of protection against rain, sleet, and damage from external ice formation.
Type 4 Indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, hose-directed water, and damage from external ice formation.
Type 4X Indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, hose-directed water, and damage from external ice formation.
Type 12 Indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping noncorrosive liquids.
Type 13 Indoor use primarily to provide a degree of protection against lint, dust, seepage, external condensation, and spraying of water, oil, and noncorrosive liquids.

 

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