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NEMA Classifications for Nonhazardous Locations:

NEMA 1:  General Purpose - Indoor

Enclosures for indoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt.

NEMA 2:  Drip-Proof - Indoor

Enclosure for indoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt.

Provide protection against dripping and light splashing of liquids.

NEMA 3:  Dust Tight, Rain Tight, Sleet Tight-Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, rain, sleet, snow and wind blown dust.

Will withstand external formation of ice on the enclosure.

NEMA 3R:  Rain Tight, Sleet Resistant - Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, rain, sleet, snow.

Will withstand external formation of ice on the enclosure.

 

NEMA 3S:  Dust Tight, Rain Tight, Sleet Tight - Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, rain, sleet, snow and wind blown dust.

Allow external mechanism(s) to remain operable when ice is formed.

NEMA 4:  Water Tight, Dust Tight, Sleet Resistant - Indoor & Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, rain, sleet, snow and wind blown dust, splashing water and hose - directed water

Will withstand external formation of ice on the enclosure.

NEMA 4X:  Water Tight, Dust Tight, Corrosion - Resistant - Indoor & Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, rain, sleet, snow and wind blown dust, splashing water and hose - directed water and corrosion

Will withstand external formation of ice on the enclosure.

NEMA 5:  Dust Tight, Drip-Proof-Indoor

Constructed for indoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, settling airborne dust, lint, fibers,  flying objects, and dripping and light splashing of liquids.

NEMA 6:  Occasionally Submersible, Watertight, Sleet Resistant - Indoor & Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, hose directed water and the entry of water during occasional temporary submission at a limited depth and the formation of ice on the outside of the enclosure.

NEMA 6P:  Watertight, Steel Resistant Prolonged Submersion - Indoor and Outdoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, hose directed water and the entry of water during occasional prolonged submission at a limited depth and the formation of ice on the outside of the enclosure.

NEMA 12:  Dust Tight and Drip Tight

Constructed without knockouts for indoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, circulating dust, lint, fibers, flying objects and against dripping and light splashing liquids.

NEMA 12 K:  Dust Tight and Drip Tight, with Knockouts - Indoor

Enclosure constructed with knockouts for indoor use only.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, circulating dust, lint, fibers, flying objects and against dripping and light splashing liquids

NEMA 13:  Oil Tight and Dust Tight - Indoor

Constructed for either indoor or outdoor use.

Provide protection to personnel against incidental contact with live components.

Provide protection against falling dirt, circulating dust, lint, fibers, flying objects and against the spraying, splashing and seepage of water, oil and noncorrosive coolants.

 

NEMA Classifications for Hazardous Locations:

NEMA 7 : Class I, Group A, B, C or D Hazardous Locations - Indoor

Enclosures constructed for indoor use in hazardous locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70.

NEMA 8 : Class I, Group A, B, C or D Hazardous Location - Indoor & Outdoor

Enclosures constructed for indoor use in hazardous locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70.

NEMA 9:  Class II, Group E,F or G Hazardous Locations - Indoor

Constructed for indoor use in hazardous locations classified as Class II, Division 1, Groups E, F or G as defined in NFPA 70.

NEMA 10:  Requirements of Mine Safety and Health Administration

Constructed to meet the requirements of the Mine Safety and Health Administration, 30 CFR, Part 18.