NEMA Enclosure Types

Type 4X Enclosures constructed for either indoor or outdoor use to provide a degree

of protection to personnel against access to hazardous parts; to provide a degree of

protection of the equipment inside the enclosure against ingress of solid foreign objects

(windblown dust); to provide a degree of protection with respect to harmful effects on

the equipment due to the ingress of water (rain, sleet, snow, splashing water, and hose

directed water); that provides an additional level of protection against corrosion; and

that will be undamaged by the external formation of ice on the enclosure.

Type 5 Enclosures constructed for indoor use to provide a degree of protection to

personnel against access to hazardous parts; to provide a degree of protection of the

equipment inside the enclosure against ingress of solid foreign objects (falling dirt and

settling airborne dust, lint, fibers, and flyings); and to provide a degree of protection with

respect to harmful effects on the equipment due to the ingress of water (dripping and

light splashing).

Type 6 Enclosures constructed for either indoor or outdoor use to provide a degree

of protection to personnel against access to hazardous parts; to provide a degree of

protection of the equipment inside the enclosure against ingress of solid foreign objects

(falling dirt); to provide a degree of protection with respect to harmful effects on the

equipment due to the ingress of water (hose directed water and the entry of water

during occasional temporary submersion at a limited depth); and that will be

undamaged by the external formation of ice on the enclosure.

Type 6P Enclosures constructed for either indoor or outdoor use to provide a degree

of protection to personnel against access to hazardous parts; to provide a degree of

protection of the equipment inside the enclosure against ingress of solid foreign objects

(falling dirt); to provide a degree of protection with respect to harmful effects on the

equipment due to the ingress of water (hose directed water and the entry of water

during prolonged submersion at a limited depth); that provides an additional level of

protection against corrosion and that will be undamaged by the external formation of ice

on the enclosure.

Type 12 Enclosures constructed (without knockouts) for indoor use to provide a

degree of protection to personnel against access to hazardous parts; to provide a

degree of protection of the equipment inside the enclosure against ingress of solid

foreign objects (falling dirt and circulating dust, lint, fibers, and flyings); and to provide a

degree of protection with respect to harmful effects on the equipment due to the ingress

of water (dripping and light splashing).

Type 12K Enclosures constructed (with knockouts) for indoor use to provide a degree

of protection to personnel against access to hazardous parts; to provide a degree of

protection of the equipment inside the enclosure against ingress of solid foreign objects

(falling dirt and circulating dust, lint, fibers, and flyings); and to provide a degree of

protection with respect to harmful effects on the equipment due to the ingress of water

(dripping and light splashing).

National Electrical Manufacturers Association Approved by NEMA Enclosures Section

1300 N. 17

Street, Suite 1752 November 2005

Rosslyn, VA 22209