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Posted by John Grabowski on December 18, 2006, 9:52 pm
> >
> >> An electrician is burying an unprotected UF-B wire on my property. In
> >> places it is approximately 4" (yes inches) below grade. I am quite
> >certain
> >> this does not meet code. Can anyone tell me:
> >> Minimum depth for buried wire w/no conduit
> >> Minimum depth with electrical PVC Conduit
> >> Minimum depth with electrical emt Conduit
> >>
> >> Thanks!!
> >
> >
> >Generally speaking 24" is minimum for UF (18" for one and two family
homes)
> >and 18" for PVC.
>
> I don't find the exception for one and two family homes in the 2005 NEC.
Table 300.5 Column 1, 6th row. Now that I read it again it might be for
only under driveways.
>
> >EMT is not permitted for direct burial
>
> John, do you have a Code cite for that? I'm not disputing you, I'm
curious. I
> didn't think it was permitted, either, but I couldn't find anything that
said
> one way or the other. Article 358.10(B) says it's permitted "in direct
contact
> with the earth" but doesn't mention burial; but 358.12 does not list
burial as
> a use not permitted.
>
>
Doug you are right. It can be construed from 358 that it is permissible to
direct bury EMT. It's something that I have never done nor do I recall ever
seeing EMT put directly in the ground. I'm not sure what fittings one would
use. Raintight?
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