Per Note 7 to Chapter 9 Table 1, for a single cable you can go up to 53%/0.8 = 66%.
I think that you want to read that again.
Good point, the allowance in the second sentence is only for a single conductor, not for a single cable.I think that you want to read that again.
If one end terminates in an outlet box, that will be taken care of.
Will the bottom end land in a junction box or disconnect enclosure?
I can see where you could interpret "walls only" as it mentions it in the section. But if you read the last sentence, it says, "Metal conduit, tubing, and metal outlet boxes shall be connected an EGC complying with the provisions of 250.86 250.148." It doesn't say whether these conduits are on the wall or the ceiling.
Then I would use PVC to avoid the bonding issue if you intend to route the NM directly into the unit.
Around here, we don't even sleeve #6 nm drops because nobody sees that as subject to physical damage.
I was wondering the same thing, 6-3 is what the engineer specified. I saw the equipment last night, and there is no neutral
If the equipment has any form of vibration, I think you need to have a flexible connection instead of a rigid conduit like EMT or PVC.
Nice catch Gus. Thinking along the lines of best practices vs. NEC (minimum standards), Is there a chance that the metal sleeve could become energized by a nicked conductor? I think I would connect the sleeve to an EGC because I would rather have that breaker trip rather than have the sleeve become energized.
