NM cable in conduit

[George Stolz]

Re: NM cable in conduit

Larry,

I could be reading sideways again, but your sheath appears to end several feet before it could be seen in the box--in a finished installation (after drywall), where is the marking?

There is no limit on length on conductors in a box.

In 2005, the code has changed a little (to my quiet dismay, over-wirer that I am) to require us to count conductors that are twice as long as required to be counted twice in box fill calculations. But this wouldn't apply in a panel, IMO. (Cabinet.)

 

[automaton]

Re: NM cable in conduit

I believe it is better to be safe then sorry I am running NM cable to a junction box then from there I am running conduit to the outside wall and to the light. I will be using THHN THWN that was my error earlier, simply left that out of my message. But I am glad that the issue of using THHN is not within code. I actually have never used just THHN except for some #6 ground wire maybe. Living in Michigan, I probably could get away with running the NM into the conduit, but I wouldnt want to risk any sort of sudden climate changes deteriorating the NM within the conduit. I am using all sealtight connections to reduce any water issues as well.

Thanks again for being so much help.

 

[LarryFine]

Re: NM cable in conduit

Originally posted by georgestolz:
Larry,

I could be reading sideways again, but your sheath appears to end several feet before it could be seen in the box--in a finished installation (after drywall), where is the marking?

George, yes, the sheath ends feet before the conductors emerge from the conduit, just as single conductors would emerge from a conduit.

As for the markings, you're right: they wouldn't be there. How about a code proposal that even cabled conductors be individually marked?

There is no limit on length on conductors in a box.

No, and I'n sure that I've brought single conductors into a disconnect or other box short enough to make the markings unreadable.