ECN Forum Forums Code Related Discussion NEC & other Code issues Assembly in a Raceway

Can someone cite for me the article for the rule that an assembly cannot be installed in a raceway.

I know it's in there but cannot remember where to find it.

Pete are you talking about cables?

Right now in the 2002 code cycle only type MC is specifically allowed in a raceway. 330.10(7)

For 2002 part of section .22 of the raceway articles was changed to this wording.


Right now type MC is the only one I know that says it is permitted in raceways.

Previously NM, UF, SE and MC could all be in raceways.

I have heard in the 2005 code you will again be able to put these cables in raceway.

I have been told it was a case of one hand not knowing what the other was doing.

All this does not change the fact that you can and are sometimes required to put any of these cables in a "short section" of raceway for physical protection.

Another forum member asked the NFPA for an official interpretation of "short section" and the reply was less than a full length of raceway.

Bob

I looked and looked and I did previously find the XXX.22 you refrenced. Yet I could not find any refrence to conduit fill, etc. which allows it.
I may have misstated my question. I was basically referring to conduits. I know about the physical damage rule for short sections.
I was always under the impression that NM, etc. could not be used in a raceway or conduit. In fact I had been told by an inspector more than once. Once we had to temporarily run a piece of romex in a short conduit and was told make sure we change it, which of course we did.
There is something about the temp rating of the conductors and an assembly in a conduit would create an unintended rise in temperature due to the added insulation.

I see this is more of a contentious issue than I thought.

Try this link for some more info.

http://www.electricalmatters.com/forum/viewtopic.php?t=138

The raceway will create no more heat build up for a cable then for the same number of single carrying conductors.

Bob