NEMA ELECTRICAL CODES

Ratings, Codes & Definitions

NEMA 1

Intended for indoor use primarily to provide a degree of protection against (hand) contact with enclosed equipment. Usually, a low cost enclosure but suitable for clean and dry environments.

NEMA 2

Intended for indoor use primarily to provide a degree of protection against limited amounts of falling dirt and water.

NEMA 3

Intended for outdoor use primarily to provide a degree of protection against windblown dust, rain, and sleet; undamaged by ice which forms on the enclosure.

NEMA 3R

Intended for outdoor use primarily to provide a degree of protection against falling rain and sleet; undamaged by ice which forms on the enclosure.

NEMA 4

Intended for outdoor use primarily to provide a degree of protection against windblown dust and rain, splashing water, and hose directed water; undamage by ice which forms on the enclosure.

NEMA 4X

Intended for indoor or outdoor use primarily to provide a degree of protection against corrosion, windblown dust and rain, splashing water, and hose directed water; undamaged by ice which forms on the enclosure.

NEMA 6

Intended for indoor or outdoors which occasional temporary submersion is encountered.

NEMA 6P

Intended for indoor or outdoors which occasional prolonged submersion is encountered. Corrosion protection.

NEMA 12

Intended for indoor use to provide a degree of protection against dust, falling dirt, and dripping noncorrosive liquids.

NEMA 13

Intended for indoor use primarily to provide a degree of protection dust, spraying of water, oil, and noncorrosive coolant.