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Inst Tools > Blog > Standards > IP Ratings and Equivalent NEMA Ratings

IP Ratings and Equivalent NEMA Ratings

Last updated: February 18, 2017 9:50 am
Editorial Staff
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IP Ratings (Ingress Protection) and Equivalent NEMA Ratings Explained

IP Ratings

An IP rating contains two numbers (i.e. IP65) in most instances which relate to the level of protection provided by an enclosure or housing.

The first number relates to protection from solids as follows:

0:  No Special Protection1:  Protected against solid objects up to 50 mm in diameter2:  Protected against solid objects up to 12 mm in diameter3:  Protected against solid objects up to 2.5 mm in diameter4:  Protected against solid objects up to 1 mm in diameter

5:  Dust protected

6:  Dust tight

The second number relates to protection from liquids as follows:

0:  No special protection1:  Protected against dripping water2:  Protected against dripping water when tilted up to 15º from normal position3:  Protected against spraying water4:  Protected against splashing water

5:  Protected against water jet spray

6:  Protected against heavy water jet spray

7:  Protected against the effects of immersion

8:  Protected against submersion

Example:  IP66 = Dust tight and protected against heavy water jet spray.

Equivalent NEMA Ratings

NEMA (National Electrical Manufacturers Association) ratings can be approximately compared to those of the IP system as shown below.  Other factors such as corrosion protection are also involved in the NEMA system, please refer to official documentation for detailed information. Below find the equivalent codes.

NEMA 1:    IP10

NEMA 2:    IP11

NEMA 3:    IP54

NEMA 4:    IP56

NEMA 4X:  IP66

NEMA 6:    IP67

NEMA 12:  IP52

NEMA 13:  IP54

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