Type 1
Indoor use to provide a degree of protection against contact with the enclosed equipment; in locations where unusual service conditions do not exist.
Type 2
Indoor use to provide a degree of protection against contact with the enclosed equipment and against limited amounts of falling water and dirt.
Type 3
Indoor or outdoor use to provide a degree of protection against windblown dust, rain and sleet; undamaged by the formation of ice on the enclosure (not sleet proof).
Type 3R
Indoor or outdoor use to provide a degree of protection against falling rain and sleet; undamaged by the formation of ice on the enclosure.
Type 3S
Indoor or outdoor use to provide a degree of protection against windblown dust, rain and sleet; provides for operation of external mechanisms when ice laden.
Type 4
Indoor or outdoor use to protect the enclosed equipment against splashing water, seepage of water, falling or hose-directed water, and severe external condensation; these enclosures are sleet resistant but not sleet proof.
Type 4X
Indoor or outdoor use to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose-directed water; undamaged by the formation of ice on the enclosure.
Type 5
Indoor use to provide a degree of protection against dust, falling dirt, and dripping non-corrosive liquids.
Type 6
Indoor or outdoor use to provide a degree of protection against the entry of water during occasional temporary submersion at a limited depth.
Type 6P
Indoor or outdoor use to provide a degree of protection against the entry of water during prolonged submersion at a limited depth.
Type 7
For use in indoor locations classified as Class I, Groups A, B, C and D, as defined in the National Electrical Code.
Type 8
For use in indoor or outdoor locations classified as Class I, Groups A, B, C and D, as defined in the National Electrical Code – oil immersed.
Type 9
For use in indoor locations classified as Class II, Groups E, F and G, as defined in the National Electrical Code.
Type 10
Mining enforcement safety administration approved.
Type 11
Indoor use to provide, by oil immersion, a degree of protection to enclosed equipment against corrosive effects of liquids and gases.
Type 12
Indoor use to provide a degree of protection against dust, falling dirt and dripping non-corrosive liquids No knockouts.
Type 12K
Indoor enclosure with knockouts to provide a degree of protection against dust, falling dirt and dripping
non-corrosive liquids other than at knockouts.
Type 13
Indoor use to provide a degree of protection against lint, dust, seepage, external condensation and spraying of water, oil and noncorrosive coolant.
