stickboy1375
Senior Member
- Location
- Litchfield, CT
nakulak said:why use nm when you can use thhn, a much better grade of conductor ?
ANy proof of this or just your opinion?
nakulak said:why use nm when you can use thhn, a much better grade of conductor ?
wbalsam1 said:If the conduit length was over 24", of which these types of installations usually are, then why wouldn't 300.17 and 358.22 come into play? :smile:
c2500 said:That may be, but around here you would be out of business because you would not be able to compete with those running that crappy sleeved NM.
c2500
Dennis Alwon said:300.17 talks about a raceway. A piece of conduit is not a raceway but a sleeve.
Suppose I ran an nm cable up a stud space for 8' and the insulators blow foam insulation and encapsulate my wire. Do I need to consider fill? I think not -- I know my example is not the same but in effect it is.
Perhaps this is more appropriate. I want to protect my wire coming down a wall so I install 2 runs of 3/8" plywood strips down the wall and use a piece of metal across the face of it. This is not a raceway but it is effectively the same. Is this a code violation?
Also Table 9 note 4 talks of 24" nipples between boxes, enclosure, and similar installations. This seems to verify my stance a bit more that fill is not counted in sleeves.
I realize this is an arguable code section but I do believe the use of Table 9 is meant for raceways.
You're welcome. I am not saying I like it either. Theoretically I could run 100' feet of conduit to sleeve a NM cable and just connect it with a rx conn. to the box and it's a sleeve not a raceway. Seems odd but there it is.wbalsam1 said:I can not find a single thing in the code to prove your interpretation wrong. No matter how much sense my argument may make to me, it is not supported by the code. Thanks for taking the time to clarify this for me. If I don't care for it, I always have the option of submitting a code change proposal. :smile:
Is this whats called a bond beam or is it a larger sized concrete beam poured around the top of the wall.??CHWflorida said:Down here we sleeve the romex until it enters the hollow cell in the cinder block below the top course, which is poured solid. We sleeve it with carflex and it runs through the void in the block. We use cut in boxes for the devices.
I used to do that too but Ive failed twice for it. the inspectors said that the cable is not supported properly. So now I just use a from too.electricalperson said:the way i do it is i run a piece of emt up and use an emt connector with a plastic bushing on the top and sleeve the romex down the pipe without stripping and strip it in the box like normal
tonyou812 said:I used to do that too but Ive failed twice for it. the inspectors said that the cable is not supported properly. So now I just use a from too.
iaov said:I believe you have to have a fitting where it comes up into the rafters/ cieling joists. Not a bushing.
iaov said:I use EMT. Its easy and it looks good. I don't know the article off hand but I believe you have to have a fitting where it comes up into the rafters/ cieling joists. Not a bushing.
blue spark said:Up here alot of builders fir out their concrete walls with 2x2s and insulate between. IMO, if your running NM which is all we do in resi, I'll sleeve it in EMT.
Thanks that is what I was asking about yet also the fill has been changed to the wide dimention of the flat nm I think which could be counter productive unless it was 3/4 pipe.augie47 said:As far as the 2008 Code is concerned, the following:
"(C) In Unfinished Basements and Crawl Spaces.............................
NM cable installed on the wall of an unfinished basement shall be permitted to be installed in a listed conduit or tubing or shall be protected in accordance with 300.4. Conduit or tubing shall be provided with a suitable insulating bushing or adapter at the point the cable enters the raceway. The NM cable sheath shall extend through the conduit or tubing and into the outlet or device box not less than 6 mm (? in.). The cable shall be secured within 300 mm (12 in.) of the point where the cable enters the conduit or tubing. Metal conduit, tubing, and metal outlet boxes shall be connected to an equipment grounding conductor. "
most of which is marked as a "change"