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-   -   bundling romex, code? (http://www.diychatroom.com/f18/bundling-romex-code-12218/)

johnnyboy 10-08-2007 06:01 PM

bundling romex, code?
 
I don't like the idea of drilling my basement joists like swiss cheese, and I have all my runs going along the perimeter of my basement and upto the walls above (nothing really through the stud/walls themselves).

Can I bundle them all together, maybe like five 12/2's together with zip ties and secure them to the rafter? Or will my inspector have a fit? Otherwise do I have to nail every wire below the joist spaced apart? I don't like this because I want to finish the ceiling someday, and thought I could just bring the walls out 3" to hide the bundles along the perimiter.

seems like a good idea to me, unless any wires ever heated up... which is why they're on a correctly rated breaker, right?

chris75 10-08-2007 06:16 PM

Article 334.15 (C) would prevent you from stapling to the bottom of the joist, and 300.15 (B)(2) would limit your bundled cables to 9 current carrying conductors before you would have to start derating your cables...


Personally, just drill out your basement...or install running boards...

johnnyboy 10-08-2007 06:21 PM

noted. thanks.

chris75 10-08-2007 06:23 PM

Quote:

Originally Posted by johnnyboy (Post 67044)
noted. thanks.

I don't agree with bored holes as bundling, some inspectors may, so to be safe you may just want to keep the holes at 3-4 cables each, and I generally use a 1" bit, just make a jig up to mark all your holes you will appreciate the end result...

Stubbie 10-08-2007 08:11 PM

Make sure your holes are no closer than 2 inches to the face of the joist and don't make holes bigger than D/3. Other than that I am with the advice given by Chris75.

michaelpwalton1 10-08-2007 11:23 PM

If you decide to drill out the joist, here is a tip....drill out every other joist going in one direction and then come back drilling the other joist from the opposite direction. The result is something like a wave as opposed to a saw tooth pattern. It will make a big difference on the effort needed during the wire pull.

chris75 10-09-2007 06:57 AM

Quote:

Originally Posted by michaelpwalton1 (Post 67115)
If you decide to drill out the joist, here is a tip....drill out every other joist going in one direction and then come back drilling the other joist from the opposite direction. The result is something like a wave as opposed to a saw tooth pattern. It will make a big difference on the effort needed during the wire pull.


Thats why I said make a jig for marking your holes...


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