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Nov 14, 2016 5:55:00 AM

What is the difference between NEMA and IP Rating Systems?

NEMA and IP Ratings both define degrees of protection against substances such as water and dust in electrical enclosures. There are differences however as each rating system is based on different standards (NEMA 250 and IEC standard 60529) and test parameters.

NEMA is geared towards industrial applications and primarily used in North America, whereas IP Ratings cover a broad set of applications worldwide. IP Ratings cover protection only against the ingress of water and solid objects while NEMA includes supplementary protection standards against corrosion resistance and atmospheric gasses (such as acetylene or gasoline). NEMA ratings also include distinctions between hazardous and non-hazardous environments.

There is no direct conversion between NEMA and IP ratings. NEMA standards meet or exceed the IP Ratings listed. However, IP Ratings do not necessarily meet NEMA standards, since NEMA includes additional product features and tests, not addressed by the IP Rating system. For example, NEMA requires functionality under icing conditions and testing for environmental hazards such as corrosion and oil, whereas IP standards do not.  Although the ratings are not directly equivalent, they can be compared as shown in the table below.

Note the table below is listed for general reference only. Additional product features and tests may be required depending on the application.

 nema_vs_ip_7.jpg

 

Source:
https://www.nema.org/Products/Documents/nema-enclosure-types.pdf

 

CLICK HERE to learn how to interpret an IP Rating Chart.

Topics: General Industrial, HVAC/R

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