Mains conduit fill question (N. America)

Per NEC all conductors must be included in the fill calculation.

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Not required to be that large by the NEC but may be required to be so by local code. Personnally i consider it to be proper design.

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Often true, but always part of conduit fill calculations.

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Thank you Ed. Jamie should pay attention to Article 250.

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Guess you've never had to deal with those passing out citations to violations.. They don't care how you, the violator interpret the rules.

I've seen the section that was used to make the citation valid, it was clear and to the point!. You can read all the other side articles you want and hope the one that counts does not get viewed, while your defending yourself. Our lawyers can tell you all about how that one plays out.

I can say with out a doubt, you would never get hired at one of our locations if you claimed to hold an E1 and practice like that.

I'll say no more on the subject, I've said too much already. It's obvious you gamble, and if you do hold a E1, go a head and sign off on those questionable jobs. Just hope no one tells you to start opening up race ways for inspection.

Jamie

Cite it. We can all read it together.

That is what I said in the first sentence of my reply.

-- bud--

In the NEC ground wires are covered by 250.122 [there is a post from gfretwell at alt.engineering.electrical, not crosposted to sci.electronics.design, on this]

Ground wires need to be big enough to produce a fault current that will rapidly open the overcurrent protection. The NEC allows, as circuit amp rating increases, a much smaller ground wire than the circuit amp rating would indicate. For instance for a 400A circuit a #3 copper ground wire can be used - rated around 100A.

If the small ground wire produced dead bodies the code would have been changed.

-- bud--