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Old 01-25-2009, 12:30 PM   #1
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Running wires across bottom of joists


OK, I'm beginning to be sorry I started reading up on the code, I never knew how bad my house was! Since it's existing work I assume I don't have to pull it out, but I've got probably a dozen different wires running like shown below. As I'm reading it, I cannot run wires smaller than 8AWG across the bottom of joists. I assume "smaller than" refers to physical size, not a lower AWG number. So, I cannot run 14AWG across the bottom of joists. Right?

Other than drilling (a lot) of holes in the joists what are my options here? I'm less worried about what's there already, it's there already, but if I run more, I assume I can't do the same since it's not up to code, but drilling all those holes seems silly too.

Running wires across bottom of joists-joistwires.jpg

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Old 01-25-2009, 12:35 PM   #2
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Running wires across bottom of joists


I may stand corrected but I thought that was just in unfinished basements.

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Old 01-25-2009, 12:53 PM   #3
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Running wires across bottom of joists


This is in an unfinished basement. The joists in the pic are the bottom of the first floor. The pipe down the middle is a gas pipe, and the insulated pipe at the top of the pic is part of the heating system.
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Old 01-25-2009, 12:57 PM   #4
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Running wires across bottom of joists


It is lower AWG than 8 guage. Your option is to place a running board beside the wires to protect them. I think the problem is preventing people using the wires as a clothes line.
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Old 01-25-2009, 12:59 PM   #5
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Running wires across bottom of joists


Oh, I thought it was crawl space. In that case, if you're trying to "finish" the basement, I'm thinking acoustic ceiling.
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Old 01-25-2009, 01:16 PM   #6
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Running wires across bottom of joists


OK, not to be silly, "It is lower AWG than 8 guage." means a lower number (6) or a smaller size (14). IOW, it's ok to run 6AWG across the joists, but it's not ok to run 14AWG, right?
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Old 01-25-2009, 01:36 PM   #7
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Running wires across bottom of joists


You are allowed to run a 1x board perpendicular to the joists and run them on the face of that.

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Old 01-25-2009, 03:28 PM   #8
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Running wires across bottom of joists


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Originally Posted by WaldenL View Post
OK, not to be silly, "It is lower AWG than 8 guage." means a lower number (6) or a smaller size (14). IOW, it's ok to run 6AWG across the joists, but it's not ok to run 14AWG, right?
Yes, lower gauge (14) not lower number
I used some old trim to run across the 2x joists, the nailed my wire to that as suggested
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Old 01-25-2009, 04:00 PM   #9
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Running wires across bottom of joists


Just run them along the sill plate, and fasten to that. No running boards required.


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