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Provided on this page is a brief generalization of the National Electrical
Manufacturers Association (NEMA) designations and Joint Industrial Council (JIC) designations which may apply to the Enclosures manufactured by EPI. These general descriptions are meant to provide a working
knowledge of each category.
NEMA DESIGNATION
NEMA TYPE 1 - General Purpose Indoor
Type 1 Enclosures are intended for
use INDOORS, primarily to prevent accidental contact of personnel with the enclosed equipment in areas where unusual service conditions do not exist.
NEMA TYPE 2 - Drip Proof Indoor
Type 2 Enclosures are intended for INDOORS to protect the enclosed equipment against falling non-corosive liquids and falling dirt.
NEMA TYPE 3 -Dustlight, Rainlight and Sleet-Ice Resistant Outdoor
Type 3
Enclosures are intended for use OUTDOORS to protect the enclosed equipment against windblown dust and water.
NEMA TYPE 3r - Raintight and Sleet-Ice Resistant Outdoor
Type 3r Enclosures are
intended for use OUTDOORS to protect the enclosed equipment against falling rain, snow, and wind.
NEMA TYPE 4 - Watertight and Dusttight Indoor and Outdoor
Type 4 Enclosures are
intended for use INDOORS and OUTDOORS to protect the enclosed equipment against splashing water, seepage of water, falling or hose directed water, and severe external condensation.
NEMA TYPE 4x
- Watertight and Dusttight, and Corrosion Resistant Indoor and Outdoor Type 4x Enclosures have the same protection and provisions as Type 4 enclosures and in addition, are corrosion resistant.
NEMA TYPE 12 - General Purpose Indoor
Type 12 Enclosures are intended for user
INDOORS to protect the enclosed equipment against fibers, flyings, lint, dust and dirt, and light splashings, seepage, dripping and external condensation of non-corrosive liquids.
NEMA TYPE 13 - Oiltight and Dusttight - Indoor
Type 13 Enclosures are intended
for use INDOORS primarily to house pilot devices such as limit switches, pushbuttons, selector switches, pilot lights, etc., and to protect these devices against lint and dust seepage, external condensation,
and spraying of water, oil, or coolant.
JIC designation
JIC standards referred to in this website are: Mass Production Equipment
- EMP-67 General Purpose Machine Tools-EGP-1-67
References:
National Electrical Manufacturers Association
155 E. 44th Street
New York City, New York 10017
Joint Industrial Council
7901 Westpark Drive
McClean, Virginia 22101
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