I'm doing the wiring for an addition to my house, and I was wonderign if
it's considered kosher to run two wires through the same hole in a
framing member. Trying to avoid weakening my framing any more than
necessary with lots of holes!
You don't want to run cable tele or phone wiring with electrical, but
otherwise it is fine.
I am assuming it is wood; some wires shouldn't be run through metal together
(the net flow has to be zero through a metal hole)
Not familiar with your neck of the woods. Here, 2-2 wire romexes are ok,
Only 1-3 wire romex to a hole. Not in the code just what is accepted
I remember that you can drill out center 20% -30% of studs with out
suffering. But that is only a memory
He said "practice". It's probably more a consequence of how many 3wire vs
2wire circuits are being run and what they're used for.
If the only 3wire you see is stoves and dryers, you can be forgiven for thinking
that 2wire is never combined with 3.
As long as the hole is of suitable size for the combination and you're
not compromising the structural strength, there's no particular restriction.
I myself prefer to only run two cables per hole. That's because I only
use one drill size ;-), and 7/8" is perfectly fine for two (2 or 3 wire).
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
It is in the code, sort of. The issue is not the holes, but the fact that
the code requires non-metallic cable run in bundles for over 24 inches to be
derated. If you have a series of holes and run the same wires through each,
they would appear to be bundled. 310.15(B)(2) requires derating to 80% for
4 to 6 current carrying conductors, 70% for 7 to 9, etc.
Only if it's per code. eg inside conduit, armor, etc..
Check your local code enforcement officer for codes.
Never can the wires themselves - no - don't do it - stick
to code so your home insurance will protect you. Whether
you -have- to use conduit or not can only be answered by
knowing your particular code - make the phone call - you'll
be glad you did.
What kind of wiring did you have in mind? Speaker, phone, or cat5 would be
fine because they are all low voltage.
Line voltage, if your running romex, or armored, I would say yes as long as
the wire was protected from nails. Example your using 6" crown in a room.
Position the wire in the center of the crown molding were there will never
be any nails or screws I would think would be ok. I have run romex or
armored behind cabinets, and under cabinets and had it inspected no worries.
Check with the local guys just be sure and safe
- Nehmo -
The romex is fine. The connections need to be in boxes or fixtures that
form boxs. You don't need to check any code either. I don't even know
where you are, but I can assuure you there is no restriction on placing
a piece of moulding over some romex. Those people who recommended
checking the code live at home and haven't lost their virginity yet.
I've read more than a couple of home wiring guides, and *ALL* say
it's OK to hide a piece of Romex behind a baseboard or molding.
Of course you need to use common sense and watch your nailing, but
why should anybody believe you don't understand that part!?
Post of the week!
TP / Network Man __________________________________
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