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Light Emitting Decoration
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1,323 Posts
Discussion Starter #1
Usually major manufacturers make them in three or more grades consisting of residential/cheapo, "spec grade", industrial grade, then hospital, isolated ground and other special purpose outlets.

Does NEMA or ANSI maintain standards for "specification grade" or is it just a name with no solid meaning used by component manufacturers?
 

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Light Emitting Decoration
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1,323 Posts
Discussion Starter #4 (Edited)
This article is pretty good about talking about the definitions.
http://www.iaei.org/magazine/?p=2225
hmm this Leviton outlet says "spec grade" in the metal mounting flange, but doesn't have the F(UL)S logo.

The W-C-596 is a specification standards that defines quality and performance. I'm not able to find the full datasheet, however usually government project will specify "outlets shall be rated W-C-596 federal spec".

Turns out, the Leviton commercial SPEC GRADE isn't really even Federal spec grade, so I don't even know what they mean. It's only the industrial line that is actually listed W-C-596 and can really be called federal spec.

So, "spec grade" "commercial grade" are just marketing phrases. If it is not W-C-596 rated, it isn't a "federal specification grade".
 
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