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splices #95651
09/25/05 10:26 PM
09/25/05 10:26 PM
T
Tripp  Offline OP
Member
Joined: Sep 2005
Posts: 99
Last week at work we had a problem where the carpenter installing medicine cabinets sent a screw through one of our NM cables and caused a short. My apprentice suggested that in lieu of tearing into a lot of sheetrock to re-run the swichtleg to the vanity light, we could just cut into the rock in the one spot where the screw hit, splice the romex there and be done. He said that there was a "UL-approved" splicing device, approved for in-the-wall splices, and that he had personally used one of these devices in the past.

My reading of NEC 300.15 would expressly forbid such a practice and I have never before heard of such an "approved" device. Anyone else?

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Re: splices #95652
09/25/05 10:54 PM
09/25/05 10:54 PM
R
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
You are correct. He is not.


Ron
Re: splices #95653
09/25/05 10:54 PM
09/25/05 10:54 PM
M
macmikeman  Offline
Member
Joined: Jul 2002
Posts: 717
Honolulu, Hawaii
There has been talk of this on other posts (possibly I saw it at a different forum, I don't remember), I think the consensus was there is some device but it is not for conceiled work behind walls.

Re: splices #95654
09/25/05 10:55 PM
09/25/05 10:55 PM
D
DSpanoudakis  Offline
Member
Joined: Aug 2005
Posts: 89
Astoria, Queens, N.Y.C.
He is the apprentice, you are not.

Re: splices #95655
09/25/05 10:58 PM
09/25/05 10:58 PM
J
jw electric  Offline
Member
Joined: Sep 2005
Posts: 106
Asheboro, NC
Tyco Electronics makes a NM cable interconnection device that is designed to be concealed in the wall. Care needs to taken that there is no violation of the NEC.

For more information on these devices see the following sections of the 2005 NEC.
545.13, 550.15(K), 551.47(O), 552.48(N) and 690.32. These are the only places in the 2005 NEC that permits the interconnection device. For more information see UL file number E57250.
[Linked Image]


Mike
Re: splices #95656
09/26/05 01:55 AM
09/26/05 01:55 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
I agree with Mike (JW) here, a few companies now make a listed in the wall splice for NM.

I suggest a look at 334.40(B) [Linked Image]

You may not have been able to use these for the repair though.

Bob

[This message has been edited by iwire (edited 09-26-2005).]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: splices #95657
09/26/05 08:34 AM
09/26/05 08:34 AM
D
dlhoule  Offline
Member
Joined: Apr 2005
Posts: 73
Saline, MI 48197
Iwire Just curious. Why would you want to fish a splice into a wall? 334.40B state you can do this during rewiring in existing buildings where the cable is concealed and fished.

Re: splices #95658
09/26/05 11:11 AM
09/26/05 11:11 AM
J
jw electric  Offline
Member
Joined: Sep 2005
Posts: 106
Asheboro, NC
Quote
I suggest a look at 334.40(B) [Linked Image]


Thank you Bob I missed the most important one

[Linked Image]


Mike

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