NEMA Types

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor use to provide a degree of protection against contact with the enclosed equipment and against a limited amount of falling dirt

Canadian Standards Association CSA Standard C22.2 No 94

General purpose enclosure; protects against accidental contact with live parts

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor use to provide a degree of protection against limited amounts of falling water and dirt

Canadian Standards Association CSA Standard C22.2 No 94

Drip proof enclosure same as Type 1; indoor use to provide a degree of protection against dripping and light splashing of non-corrosive liquids and falling dirt

NEMA 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)

Underwriters Laboratories Inc. UL 50 and UL 508

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

Canadian Standards Association CSA Standard C22.2 No 94

Weatherproof enclosure; indoor or outdoor use to provide a degree of protection against rain, snow and blown dust; undamaged by the external formation of ice on the enclosure

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against falling rain and sleet; undamaged by the formation of ice on the enclosure

Canadian Standards Association CSA Standard C22.2 No 94

Weather proof enclosure; indoor or outdoor use to provide a degree of protection against rain or snow; undamaged by the external formation of ice on the enclosure (CSA does not specify sleet resist)

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against windblown dust, rain and sleet; external mechanisms remain operable while ice laden

Canadian Standards Association CSA Standard C22.2 No 94

Weather proof enclosure; indoor or outdoor use to provide a degree of protection against rain or snow; undamaged by the external formation of ice on the enclosure surface (CSA does not specify sleet proof)

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against splashing water, windblown dust and rain, and hose directed water; undamaged by the formation of ice on the enclosure

Canadian Standards Association CSA Standard C22.2 No 94

Watertight enclosure; indoor or outdoor use to provide a degree of protection against rain, snow, blown dust, splashing and hose directed water; undamaged by the external formation of ice on the enclosure

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against splashing water, windblown dust and rain, and hose directed water; undamaged by the formation of ice on the enclosure; resists corrosion

Canadian Standards Association CSA Standard C22.2 No 94

Watertight enclosure; indoor or outdoor use to provide a degree of protection against rain, snow, blown
dust, splashing and hose directed water; undamaged by the external formation of ice on the enclosure; resists corrosion

NEMA 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

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against the entry of water during temporary submersion at a limited depth; undamaged by the formation of ice on the enclosure

Canadian Standards Association CSA Standard C22.2 No 94

No CSA equivalent

NEMA Type 6P

Indoor or outdoor use to provide a degree of protection against the entry of water during prolonged submersion at a limited depth

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor or outdoor use to provide a degree of protection against the entry of water during prolonged submersion at a limited depth

Canadian Standards Association CSA Standard C22.2 No 94

No CSA equivalent

NEMA Type 12

Indoor use to provide a degree of protection against dust, falling dirt and dripping non-corrosive liquids No knockouts

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor use to provide a degree of protection against dust, falling dirt and dripping non-corrosive liquids No knockouts

Canadian Standards Association CSA Standard C22.2 No 94

Indoor use to provide a degree of protection against circulating dust, lint, fibers, dripping and light splashes of non-corrosive liquids

NEMA Type 13

Indoor use to provide a degree of protection against lint, dust, seepage, external condensation and spraying of water, oil and noncorrosive coolant

Underwriters Laboratories Inc. UL 50 and UL 508

Indoor use to provide a degree of protection against dust and spraying of water, oil and non-corrosive coolants

Canadian Standards Association CSA Standard C22.2 No 94

Indoor use to provide a degree of protection against circulating dust, lint, fibers, seepage and spraying of non-corrosive liquids including oils and coolants