Need good reference for Nema 4,4x,12 wiring practices

[OEMsparky]

Anyone have a good reference (electronic or book) that details the specific requirements for an electrical installation to be classified Nema 12, Nema 4, and Nema 4x. I work for a company that is an OEM of pkg equipment and could use a good reference for these situations. Including allowable enclosure penetrations, enclosure and cable types, etc.

Thanks.

 

[buzzp]

You need to purchase some standards for a thorough explanation. You may find something for free on the web but I think the standard is less than $100 US dollard (think more like $50). UL has similar ratings (although not exact) and I believe this is UL50. Not sure what NEMA standard is but ULs site will cross it to a NEMA standard (most likely NEMAs standard has a 50 in it somewhere too- can not recall).

 

[DRWeig]

Hiya, Shaun!

BuzzP is right. The standards aren't that expensive, and if you're in a reasonably big city they'll be available at a public library (Memphis has 'em). My company uses them all, so we have a set. They're fairly detailed about testing, so a summary won't really do. Wiring practices aren't covered, just enclosures. Wiring methods are in the NEC.

Good luck!

Old Dave