ECN Forum Forums General Topics of the Trade General Discussion Area Romex in commercial (wood frame) buildings.

whare do I find the ampacity of NM?

bucketman: 310-16 60 degree column

We are allowed to use romex in metal studs here as long as you use gromets through penetrations of the studs.

Electric Eagle, thanks.

For 14,12,10 you really need to look at 240.4(D)

so whare does it tell us to us the 60c column
for the ampacity of NM.
I know about the small conductores in 240.4 (D) but what about every thing else.

I was looking at 6/3 NM and theirs no temp rating.

334.80

cool thanks

There should be no code issues (as the assembly space is for less than 100 people).
The owner is really looking for ways to cut cost. They already took out the air conditioning.
I think we will still use metal boxes.

I have no problem whatsoever. NM would be the preferred way here assuming correct building type and no code restrictions.

The cost savings could be significant given the price difference. A spot check of prices is about $120/M for 12/2 NM cable and $240/M for 12/2 MC cable.

Peter


[This message has been edited by CTwireman (edited 02-25-2005).]