I nicked the sheathing on some NM pulling it through a run. The wires are
fine, its just the sheathing that's damaged. Do I really have to go back
and re-run the wire, or could I possibly junction box it and salvage the
current run? Could I <GASP!> use electrical tape to repair it (or its
equivalent)? Its basic 12 guage NM. Only reason why I'm asking is because
the bulk of the run is behind finished walls that were put into place a long
Electrical tape is perfectly acceptable for repairing a nicked jacket.
It's even acceptable for repairing nicked insulation on the actual wire.
What is not acceptable is repairing a physical break in the wires within
the wall cavity. Repair of a physical break in the wire requires a
junction box just like any other splice or junction does.
I'm not sure if the electrical tape repair is a good or a bad thing. I was
actually being (badly) funny in suggesting it. I didn't actually thing it
was used in practice. Well, given the options I'll take tape then, the
nicks aren't huge or anything.
I had two options on the table, I didn't mention the other one because I was
more interested in the ruling of repair. Since you broached the subject why
I have to junction box the wire at some point regardless as I need to tie
outlets and a switched light to a single circuit. Spur the outlets and
light switch from a junction box - say at the break in the sheathing, then
run a short wire to the light switch from the junction box - problem solved.
The break in the sheathing just happens to be about 9 inches from where the
light switch is. So I was looking at it wondering if it was worth the risk
to repair the sheathing and go straight in to the switch box, and tie the
outlets in from another circuit nearby.
Basically I've got 4 existing outlets daisy chained on a single 15A breaker,
and 4 wall lights on another 15A breaker. I was going to wire the next set
of outlets and lights from the circuit powering the lights as it has a very
low load on it. But I can just as easily tie in with the existing outlets
for the new 2 outlets and power the lights with this circuit. It would
eliminate the need for the junction box, but require me to repair the
sheathing. 50/50 toss up so far as I'm concerned - although keeping the
outlets and lights on their respective circuits makes much more sense to me.
If you can slide it over the end and all the way to where the
nick is located.
My electricians use electrical tape on nicks all the time and
they have passed inspection. Of course, the inspectors know
my electrician and know that he would not allow electrical
tape if there were an actual break in the wire itself.
The Cold Shrink Tape (Scooter Products) someone mentioned looks a lot
like the roll I liked, black on white plastic, but I thought mine is
meant to be stretched as it is put on. It works well that way. The
blurb for the scooter stuff refers to stretching it over unuusallly
As usual the home depot page stinks, failing to find anything for
shrink tape. And for tape, finding only one regular vinyl electrical
tape and all the rest are measuing tapes, plus drywall corners (which
I guess get taped later.)
Searching on shrink, I get not a single hit. I hate hd's webpage.
Maybe they don't sell it anymore.
It was a lot cheaper than the scooter stuff, but I never actually saw
it. I go to a lot of hamfests where this stuff is not for sale, so
looking for it there is only good if you want to go to the hamfest
anyhow. They're fun. Lots of used stuff.
On Sat, 25 Aug 2007 21:08:56 -0700, "Eigenvector"
Heat shrink is great. Great for splices too of course.
If it were in place already, silicon tape, or maybe it is also called
shrink tape, is great too. See my post above.
I understand that commercial electricians make mistakes and cut corners, and
use electrical tape to cover nicks.
And I understand that in a protected location it isn't dangerous. (of
course, just doing nothing wouldn't be dangerous in a protected location
either; but no one gave that as an alternative).
But it is either allowed or forbidden by code?
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