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everyman 07-07-2009 12:19 AM

Attic wiring question
Hi again,

Earlier I was asking about wiring some new recessed lighting cans. I have the wiring all worked out and tested and it works great. I have one question though before I move on the next job. In an attic is there any sort of standard for how you route romex?

90% of the original wiring in this 80's duplex is just laid over the top of the joists and pulled tight enough so that you'd probably get a note out of it if you strummed it. It's kind of a pita to work in the attic when all of the wiring is on top of where you need to walk and stand and strewn helter skelter. I always thought you were meant to drill small holes in the joists and route the wire between them rather than on top. Is this not the case?


bobelectric 07-07-2009 02:52 AM

We weren't allowed to drrill anything less than2x8 rafters.

dSilanskas 07-07-2009 05:01 AM

If there is no strapping than drill holes in the joists. Don't leave it laying on top to get damaged

Scuba_Dave 07-07-2009 07:09 AM

I never drill the joists unless I know they are over-sized
In many cases they are barely sized big enough to carry the load
You could put strapping on the joists & then put plywood over the wire to make a floor

J. V. 07-07-2009 09:47 AM

I use notches or holes. Unless I can run it along the side of the beam or rafter. If it's on top it's considered "subject to physical damage". This actually is a code violation depending on who interprets it. You do not have to correct the existing wiring, but now is a good time to start installing it correctly. (not laid or strapped to the top of the rafters).

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