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NEMA 250 Ratings and IEC IP Comparison Chart

Date:2010-7-9 15:13

The IEC and NEMA degrees of protection can not be fully compared as equivalent ratings - see below. The NEMA Standard includes tests for environmental conditions such as mechanical damage, corrosion, rusting, ice formation, etc.
Further information can be found about the North American classification scheme in NEMA Standard Publication 250 and UL 40 Standard Publication.

NEMA Rating

Approximate
IP code

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 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 thee 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.

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