NEMA REFERENCE
NON-HAZARDOUS LOCATIONS |
TESTS CONDUCTED
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TYPE 1 enclosures are intended for indoor use
primarily to provide a degree of protection against contact with the enclosed equipment. |
Rust entry
Rust resistance
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| TYPE 2 enclosures are intended for indoor use primarily to provide a degree of protection against limited amounts of falling water and dirt. |
Rod entry
Drip
Rust resistance
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| TYPE 3 enclosures are intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; and to be undamaged by the formation of ice on the enclosure. |
Rain
Dust
External icing
Rust resistance
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| TYPE 3R enclosures are intended for outdoor use primarily to provide a degree of protection against falling rain; and to be undamaged by the formation of ice on the enclosure. |
Rod entry
Rain
External icing
Rust resistance
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| TYPE 3S enclosures are intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet, and to provide for operation of external mechanisms when ice laden. |
Rain
Dust
External icing
Rust resistance
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| TYPE 4 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water. |
Hosedown
External icing
Rust resistance
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| TYPE 4X enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose -directed water. |
Hosedown
External icing
Corrosion resistance
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| TYPE 6 enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against the entry of water during temporary submersion at a limited depth. |
Submersion
External icing
Rust resistance
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| TYPE 6P enclosures are intended for indoor or outdoor use primarily to provide a degree of protection against the entry of water during prolonged submersion at a limited depth. |
Air pressure
External icing
Corrosion resistance
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| TYPE 12 enclosures are intended for indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping non-corrosive liquids. Rust resistance |
Drip
Dust
|
TYPE 13 enclosures are intended for indoor use
primarily to provide a degree of protection against dust, spraying water, oil, and non-corrosive coolant. |
Oil exclusion
Rust resistance
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| HAZARDOUS LOCATIONS |
TESTS CONDUCTED
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| TYPE 7 enclosures are intended for indoor use in locations classified as Class I, Groups A, B, C, or D,as defined in the National Electrical Code. |
Explosion
Hydrostatic
Temperature
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| TYPE 9 enclosures are intended for indoor use in locations classified as Class II, Groups E, F or G, as defined in the National Electrical Code. |
Dust Penetration
Temperature
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