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Nema Control Enclosure Ratings
ENCLOSURE TYPEDESCRIPTION
NEMA TYPE 1
GENERAL PURPOSE
Enclosures are intended for indoor use primarily to provide a degree of protection against accidental contact with the enclosed equipment or locations where unusual service conditions do not exist.
NEMA TYPE 2
DRIPTIGHT
Enclosure are intended for indoor use primarily to provide a degree of protection against limited amounts of falling water and dirt.
NEMA TYPE 3
WEATHER RESISTANT
Enclosures are intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; undamaged by the formation of ice on the enclosure.
NEMA TYPE 3R
RAINTIGHT
Enclosures are intended for outdoor use primarily to provide a degree of protection against falling rain and sleet; undamaged by the formation of ice on the enclosure.
NEMA TYPE 4
WATERTIGHT
Enclosures are intended for outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; undamaged by the formation of ice on the enclosure.
NEMA TYPE 4X
CORROSION RESISTANT
Enclosures are intended for outdoor use primarily to provide a degree of protection against corrosion, wind blown dust and rain, splashing water and hose directed water; undamaged by the formation of ice on the enclosure.
NEMA TYPE 5
DUST TIGHT
Enclosure are intended for indoor use primarily to provide a degree of protection against falling dust.
NEMA TYPE 6
SUBEMERSIBLE
Enclosures are intended for outdoor use primarily to provide a degree of protection against submersion in water at a specified pressure and time.
NEMA TYPE 7
HAZARDOUS LOCATIONS
CLASS I AIR BREAK
Enclosures are intended for hazardous use, designed to meet application requirements of the National Electrical Code for Class I, hazardous locations (explosive atmosphere). Circuit interruption occurs in air.
NEMA TYPE 8
HAZARDOUS LOCATIONS
CLASS II-OIL-IMMERSED
GROUP A,B,C, AND D
Enclosures are intended for hazardous use, designed to meet application requirements of the National Electrical Code for Class II hazardous locations (explosive atmosphere). Circuit interruption occurs in oil.
NEMA TYPE 9
HAZARDOUS LOCATIONS
CLASS II, GROUP E,F,OR G
Enclosures are intended for hazardous use, designed to meet application requirements of National Electrical code for Class II Hazardous Locations (combustible dusts, grains, etc.).
NEMA TYPE 10
BUREAU OF MINES
Enclosures are intended for hazardous use, designed to meet requirements of U.S. Bureau of Mines. Suitable for use in coal mines.
NEMA TYPE 11
ACID & FUME RESISTANT
OIL IMMERSED
Enclosures are intended for use in corrosive atmospheres, provide oil immersion of apparatus such that it is suitable for applications where equipment is subject to acid or their corrosive fumes.
NEMA TYPE 12
INDUSTRIAL USE
Enclosures are intended for heavy duty indoor use primarily to provide a degree of protection against dust, falling dirt, and dripping noncorrosive liquids.

AMERICAN MANUFACTURING COMPANY, INC.
Last revised: Jan-9-2006
Comments to: info@americanonsite.com
Copyright © American Manufacturing Company, Inc., 2000

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