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everyman 07-07-2009 01:19 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?


Thanks
Eric

bobelectric 07-07-2009 03:52 AM

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

dSilanskas 07-07-2009 06:01 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 08:09 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 10:47 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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