I have a project which wil require a very flexible conductor (type "G") because it is being routed in a flexible Cat-trac to a machine which moves. The cable will also run about 20 feet in an embedded conduit in a floor slab. I don't find any information in NEC article 400 that discusses derating this type cable for embedded conduit, in fact I'm not sure this is an acceptable application. This is a 480 volt, 3 phase, 200 amp circuit. I am assuming 75 degree C cable ampacity because of the UL rating for the terminations on each end. Any thoughts?
Flexible cord ampacity
- Thread starter bsh
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As I read it:bsh said:
400.8(1)
400.8(5)
do NOT allow it....although a stretch might be 400.(6).
Would it be an option to run from panel, underfloor RMC then attach a JB to that end (using THWN as the conductors))?
From the JB you could attach your Type G w/o much fanfare [400.7(9)]
The THWN's would make for a much easier pull, also.
petersonra
Senior Member
- Location
- Northern illinois
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- Semi-retired engineer
I like the idea of a jbox after the underfloor run.
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