NEMA Ratings and IP Equivalency Chart
| NEMA Rating | IP Equivalent | NEMA Definition | Protection Against Solids | Protection Against Liquids |
|---|---|---|---|---|
| 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 solid foreign objects of 50mm in diameter and greater | 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 | IP66 | 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 that will be undamaged by the external formation of ice on the enclosure | 6 = Totally protected against dust | 6 = Protected against strong jets of water from all directions - Limited to ingress permitted. |
| 4X | IP66 | 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 thee external formation of ice on the enclosure | 6 = Totally protected against dust | 6 = Protected against strong jets of water from all directions - Limited 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 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. |
Note: The purpose of this table is to provide general information on the definitions of NEMA Enclosure Types and the equivalent definitions of IEC 60529 Enclosure Classification Designations. NEMA ratings and testing can be used as compliance for IP Rating but not vice versa.
[For more detailed and complete information, ANSI/NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum) and IEC 60529 Degrees of protection provided by enclosures (IP Code) should be consulted.]