| Enclosure Rating |
NEMA
National Electrical Manufacturers Association (NEMA 250) |
UL
Underwriters Laboratories, Inc. (UL 50 and 508) |
CSA
Canadian Standards Association
(C22.2 No. 94-M91) |
| Type 1 |
Enclosures are intended for indoor use primarily to provide a degree of protection against the contact with the enclosed equipment. |
Indoor use primarily to provide protection against contact with the enclosed equipment and against a limited abount of falling dirt. |
General purpose enclosure. Protects against accidental contact with live parts. |
| Type 2 |
Enclosures are intended for indoor use primarily to provide a degree of protection against limited amounts of falling water and dirt. |
Indoor use to provide a degree of protection against contact with the enclosed equipment and against a limited amount of falling dirt. |
Indoor use to provide a degree of protection against dripping and light splashing of noncorrosive liquids, and falling dirt. |
| Type 3 |
Enclosures are intended for outdoor use primarily to provide a degree of protection against rain, sleet, windblown dust, and damage from external ice formation. |
Outdoor use to provide a degree of |
Indoor or outdoor use to provide a degree of protection against rain, snow, and windblown dust; undamaged by the external formation of ice on the enclosure. |
| Type 3R |
Enclosures are intended for outdoor use primarily to provide a degree of protection against rain, sleet, and damage from external ice formation. |
Outdoor use to provide a degree of |
Indoor or outdoor use to provide a degree of protection against rain, snow; undamaged by the external formation of ice on the enclosure. |
| Type 4 |
Enclosures are intended for indoor and 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. |
Indoor or outdoor use to provide a degree of |
Indoor or outdoor use to provide a degree of protection against rain, snow, and windblown dust; splashing and hose-directed water; undamaged by the external formation of ice on the enclosure. |
| Type 4X |
Enclosures are intended for indoor and 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. |
Indoor or outdoor use to provide a degree of |
Indoor or outdoor use to provide a degree of protection against rain, snow, and windblown dust; splashing and hose-directed water; undamaged by the external formation of ice on the enclosure; resists corrosion. |
| Type 6 |
Enclosures are intended for indoor and outdoor use primarily to provide a degree of protection againsthose-directed water, the entry of water during occasional temporary submersion at a limited depth, and damage from external ice formation. |
Indoor or outdoor use to provide a degree of |
Indoor or outdoor use to provide a degree of protection against entry of water during temporary submersion at a limited depth; undamaged by the formation of ice on the enclosure. |
| Type 12 |
Enclosures are intended for indoor use primarily to provide a degree of protection against circulating dust, falling dirt, and dripping non-corrosive liquids. |
Indoor use to provide a degree of |
Indoor use primarily to provide a degree of protection against circulating dust, lint, fibers, and flyings; dripping and light splashing of noncorrosive liquids; not provided with knockouts. |
| Type 13 |
Enclosures are intended for indoor use primarily to provide a degree of protection against dust, spraying water, oil and non-corrosive liquids. |
Indoor use to provide a degree of |
Indoor use primarily to provide a degree of protection against circulating dust, lint, fibers, and flyings; seepage and spraying of noncorrosive liquids including oils and coolants. |
