February 21-23, 2017
AFCEA / WEST 2017
San Diego, California



NEMA and IP Comparisons

NEMA Ratings & IP Equivalent Conversion Chart


NEMA Rating NEMA Definitions IP Equivalent IP Definitions IP Numerical Protection Levels
Type 1 Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment & to provide a degree of protection against falling dirt IP10 1 = Protected against solid foreign objects of 50mm in diameter & greater 0 = Not Protected
Type 2 Enclosures constructed for indoor used to provide a degree of protection to personnel against incidental contact with the enclosed equipment, to provide a degree of protection against falling dirt, & to provide a degree of protection against dripping & light splashing of liquids IP11 1 = Protected against solid foreign objects of 50mm in diameter & greater 1 = Protected against vertically falling water drops
Type 3 Enclosures constructed for either indoor or outdoor used to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to proved a degree of protection against falling dirt, rain, sleet, snow, & windblown dust; & that will undamaged by external formation of ice on the enclosure IP54 5 = Protected against dust - Limited to ingress (no harmful deposit) 4 = Protected against water sprayed from all directions - Limited to ingress permitted.
Type 3R Enclosures constructed for either indoor or outdoor used to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, & snow; & that will be undamaged by external formation of ice on the enclosure IP14 1 = Protected against vertically falling water drops 4 = Protected against water sprayed from all directions - Limited to ingress permitted.
Type 3S Enclosures are constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, & windblown dust; & in which the external mechanism(s) remain operable when ice laden. IP54 5 = Protected against dust - Limited to ingress (no harmful deposit) 4 = Protected against water sprayed from all directions - Limited to ingress permitted.
Type 4 Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water, & hose-directed water; & that will be undamaged by the external formation of ice on the enclosure IP 56 5 = Protected against dust - Limited to ingress (no harmful deposit) 6 = Protected against strong jets of water from all directions - Limited to ingress permitted.
Type 4X Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt, rain, sleet, snow, windblown dust, splashing water, hose-directed water, & corrosion; & that will be undamaged by thee external formation of ice on the enclosure IP56 5 = Protected against dust - Limited to ingress (no harmful deposit) 6 = Protected against strong jets of water from all directions - Limited to ingress permitted.
Type 5 Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against settling airborne dust, lint, fibers, & flyings; & to provide a degree of protection against dripping & light splashing of liquids. IP52 5 = Protected against dust - Limited to ingress (no harmful deposit) 2 = Protected against direct sprays of water up to 15° from the vertical.
Type 6 Enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water & the entry of water during occasional temporary submersion at a limited depth; & that will be undamaged by the external formation of ice on the enclosure. IP67 6 = Totally protected against dust 7 = Protected against the effects of temporary immersion between 15cm & 1m. Duration of test 30 minutes.
Type 6P Enclosures constructed for either indoor or outdoor use to provide a degree of protection to the personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against hose-directed water & the entry of water during prolonged submersion at a limited depth; & that will be undamaged by the external formation of ice on the enclosure IP67 6 = Totally protected against dust 7 = Protected against the effects of temporary immersion between 15cm & 1m. Duration of test 30 minutes.
Type 12 & 12K Enclosures constructed (without knockouts) for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, & flying; & against dripping & light splashing of liquids IP52 5 = Protected against dust - Limited to ingress (no harmful deposit) 2 = Protected against direct sprays of water up to 15° from the vertical.
Type 13 Enclosures cons tructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment; to provide a degree of protection against falling dirt; against circulating dust, lint, fibers, & flyings; & against the spraying, splashing, & seepage of water, oil, & noncorrosive coolants. IP54 5 = Protected against dust - Limited to ingress (no harmful deposit) 4 = Protected against water sprayed from all directions - Limited to ingress permitted.


NEMA Hazardous Enclosure Types

NEMA Rating NEMA Definitions
Type 7 Enclosures constructed for indoor use in hazardous (classified) locations classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA 70.
Type 8 Enclosures constructed for either indoor or outdoor use in hazardous (classified) locations classified as Class I, Division 1, Groups A, B, C, and D as defined in NFPA 70.
Type 9 Enclosures constructed for indoor use in hazardous (classified) locations classified as Class II, Division 1, Groups E, F, or G as defined in NFPA 70.
Type 10 Enclosures constructed to meet the requirements of the Mine Safety and Health Administration, 30 CFR, Part 18.
Type 11 Enclosures are corrosion-resistant and are intended for use indoors to protect the enclosed equipment against dripping, seepage and external condensation of corrosive liquids. In addition, they protect the enclosed equipment against the corrosive effects of fumes and gases by providing for immersion of the equipment in oil. They shall have conduit hubs or equivalent provision for watertight connection at the conduit entrance and mounting means external to the equipment cavity.
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