NEMA Standards rate different grades of electrical enclosures based on the level of protection in various environments. Natural elements like wind, dust and water are included in the criteria, along with chemicals, coolants, oil and corrosive elements like gasoline.
There are more than 13 total NEMA ratings for industrial applications in the United States, ranging from general purpose ratings for light dust indoors, like NEMA 1 to Hazardous materials covered in NEMA 7-9. Official NEMA Standards Website
The NEMA 4 rating applies specifically to some of the electrical connectors used by Remke customers. FAQ about NEMA 4 enclosure standards
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.
Same as NEMA 4 including protection against corrosion.
Many of the stainless steel, watertight cord grips from Remke are NEMA 4 and NEMA 4X rated. Type 316 and 304 stainless steel connectors are in stock, or we can custom-fabricate a NEMA 4 connector to your exact specs.
The Future of NEMA 4 Standards
Since NEMA Standards are used only in the United States, they are relied on less frequently as manufacturing is globalized. Manufacturers who compete globally rely on IP Code, or Ingress Protection Rating (aka International Protection Rating). These standards also classify degrees of protection provided for solid objects and water in electrical connectors. We’ll address the different IP ratings in a future blog post.
IP Code is increasingly making NEMA standards irrelevant. With the younger generations rising up to management and decision-making positions, we could see a future where NEMA standards either blend with, or are replaced entirely by IP Code.
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