NEMA Ratings and IP Equivalency
| NEMA Rating | IP Equiv | NEMA Definition | IP Definition | |
| 1 | IP10 | Enclosures constructed for indoor use to provide a degree of protection to personnel against incidental contact with the enclosed equipment and to provide a degree of protection against falling dirt. | 1 = Protected against solid foreign objects of 50mm in diameter and greater | 0 = Not Protected |
| 2 | IP11 | 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, and to provide a degree of protection against dripping and light splashing of liquids. | 1 = Protected against solid foreign objects of 50mm in diameter and greater | 1 = Protected against vertically falling water drops |
| 3 | IP54 | 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, and windblown dust; and that will undamaged by external formation of ice on the enclosure. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 4 = Protected against water sprayed from all directions - Limited to ingress permitted. |
| 3R | IP14 | 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, and snow; and that will be undamaged by external formation of ice on the enclosure. | 1 = Protected against vertically falling water drops | 4 = Protected against water sprayed from all directions - Limited to ingress permitted. |
| 3S | IP54 | 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, and windblown dust; and in which the external mechanism(s) remain operable when ice laden. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 4 = Protected against water sprayed from all directions - Limited to ingress permitted. |
| 4 | IP 56 | 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, and hose-directed water, and corrosion; and that will be undamaged by the external formation of ice on the enclosure. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 6 = Protected against strong jets of water from all directions - Limited to ingress permitted. |
| 4X | IP56 | 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, and corrosion; and that will be undamaged by the external formation of ice on the enclosure. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 6 = Protected against strong jets of water from all directions - Limited to ingress permitted. |
| 5 | IP52 | 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, and flyings; and to provide a degree of protection against dripping and light splashing of liquids. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 2 = Protected against direct sprays of water up to 15° from the vertical. |
| 6 | IP67 | 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 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. | 6 = Totally protected against dust | 7 = Protected against the effects of temporary immersion between 15cm and 1m. Duration of test 30 minutes. |
| 6P | IP67 | 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 and the entry of water during prolonged submersion at a limited depth; and that will be undamaged by the external formation of ice on the enclosure. | 6 = Totally protected against dust | 7 = Protected against the effects of temporary immersion between 15cm and 1m. Duration of test 30 minutes. |
| 12 and 12K | IP52 | 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, and flying; and against dripping and light splashing of liquids. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 2 = Protected against direct sprays of water up to 15° from the vertical. |
| 13 | IP54 | 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 circulating dust, lint, fibers, and flyings; and against the spraying, splashing, and seepage of water, oil, and noncorrosive coolants. | 5 = Protected against dust - Limited to ingress (no harmful deposit) | 4 = Protected against water sprayed from all directions - Limited to ingress permitted. |