Gary,
Anything outside (which includes the interior of the conduit)
must be rated for wet locations. It therefore must have a 'W' in the name
THW, THWN etc. Most 'THHN' is dual rated as THWN too.
See ('99 NEC) Art 310-8(c)
Look in Table 310-13 to see the Applications for the different wiring types.
Bill
At 10:30 AM 8/23/01 -0700, Gary McInturff wrote:
Does anybody have a clue what type of wire I can run in conduit for
outside environments. Internally, I have to worry about riser cables and
cables in air plenums etc, but how about if I am running through conduit
from the base of a power pole to ITE equipment located at the top of the
pole (or hung from the wire strands themselves)?
I have run through what I thought would be the obvious places in the
NEC, but either didn't see it or misinterpreted the section that would
apply.
Thanks
Gary
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