Repair Romex wire


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Old 11-30-23, 06:44 AM
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Repair Romex wire

I had to remove a section of drywall from the garage ceiling and unfortunately nicked some romex with the drywall saw damaging the insulation. Before putting the drywall back in, I want to repair this section of wire but am not sure the best way to do so.

There is not a lot of slack in the wiring to be able to easily use a junction box and I would prefer not to have to cut the wire, add an additional length and then use 2 boxes to join everything together. Would something like this be acceptable to use: https://www.amazon.com/221-2401-Comp...0BT8DHLJJ&th=1

Failing that, what other options are there? I have not yet tried pulling the wire to see how much slack is available but am pretty certain it is not enough and pulling an entire new run of wiring is not a realistic option.

Thanks.
 

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11-30-23, 03:44 PM
pattenp
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WWirepuller38 , Today 10:46 AM
All wire connections must be accessable.
This is not a totally correct statement. Tyco splice connectors in certain cases can be enclosed in a wall without having access. NEC 334.40b.
 
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Old 11-30-23, 08:46 AM
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All wire connections must be accessable.
 
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Old 11-30-23, 11:13 AM
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All wire connections must be accessable.
in other words, in a box that is accessible without removing other than the box cover.

Two junction boxes with covers is really the way to do it. You can separate the boxes and run new wire between them to make them less noticeable.
 
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Old 11-30-23, 11:54 AM
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The accessible piece certainly makes this a bigger job than I hoped, but rather do it properly. I'll get up there with a ladder to see if I can at least get enough slack to use a box (guessing I will not be anywhere near that lucky) so may end up simply needing to use 2 boxes and add a section of wire between.

Luckily, it being in the garage, means not so much of a worry about it looking less than ideal.
 
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Old 11-30-23, 03:44 PM
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WWirepuller38 , Today 10:46 AM
All wire connections must be accessable.
This is not a totally correct statement. Tyco splice connectors in certain cases can be enclosed in a wall without having access. NEC 334.40b.
 
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Old 11-30-23, 04:39 PM
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Is that restricted to new manufactured homes only?
 
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Old 11-30-23, 04:43 PM
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Ccwbuff , Today 06:39 PM
Is that restricted to new manufactured homes only?
No. Look up the NEC section I posted.. Actually I see the 2023 NEC removed the restriction to repairs only and now allows the use to extend circuits.
 

Last edited by pattenp; 11-30-23 at 05:04 PM.
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Old 11-30-23, 04:48 PM
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Tyco splice connectors in certain cases can be enclosed in a wall without having access. NEC 334.40b.
That is correct although I don't agree with the code on this.
 
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Old 11-30-23, 05:15 PM
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naiku, if you nicked just the outer jacket you can tape it up if the conductor's insulation is not damaged exposing bare copper.
 
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Old 11-30-23, 05:18 PM
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If there is an attic with access, then the box can be in the attic and is considered accessible.
 
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Old 12-01-23, 08:12 AM
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Originally Posted by pattenp
naiku, if you nicked just the outer jacket you can tape it up if the conductor's insulation is not damaged exposing bare copper.


I'll take a look later, I wrapped it in tape for now but suspect that copper is at least visible on one conductor.

Originally Posted by joed
If there is an attic with access, then the box can be in the attic and is considered accessible.
Unfortunately it is between first floor and second floor, so no attic access.

I checked the wire slack earlier and no chance of being enough, so looks like the 2 box route.
 
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Old 12-01-23, 10:42 AM
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There is a ton of conflicting information (surprise, surprise) about in wall splices w/o the use of a junction box. Apparently the latest version of the NEC (NEC 334.40b.) allows it. Unfortunately, most of us don't have access to that. Can you post the relevant section of NEC 334.40b?
 
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Old 12-01-23, 04:26 PM
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The NEC at least since 2014 has allowed the use of Tyco splice connectors to be used to repair NM-b wiring without the use of junction boxes.
 

Last edited by pattenp; 12-01-23 at 07:25 PM.
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Old 12-01-23, 04:29 PM
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naiku, the Tyco splice connector should work in your situation without the need for junction boxes.
 
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Old 12-01-23, 06:52 PM
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Old 12-01-23, 06:55 PM
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Can you post the relevant section of NEC 334.40b
Form 2020 NEC:

334.40(B) Devices if insulating material. Self-contained switches, sefl-contained receptacles, and nonmetallic sheathed cable interconnector devices of insulating material that are listed shall be permitted to be used without boxes in exposed cable wiring and for repair wiring in existing buildings where the cable is concealed.
 
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Old 12-01-23, 06:56 PM
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