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Wire splice in concealed location

30K views 26 replies 17 participants last post by  MotoGP1199  
#1 ·
Do you guys know of any kits that allow a splice to be made and concealed? I want to know incase it's ever needed.
 
#6 ·
I would feel much better with a handybox and wirenuts than that gadget that says it's made for concealed locations.

If you do it right, you can make absolutely solid connections in a handybox without any fear of them coming apart or shorting out.

In this situation, I fold the romex sheath back over itself to double it up for the 1/2" that it sits inside of the romex connector, just for added cushion and protection. I also pay very close attention to the wires when stripping them to make sure that I don't nick the conductor. I then pre-twist the wires but I do it lightly, then screw on the wirenut.

That connection will last forever.
 
#8 ·
Do yourself a favor and don't Goddamn do it.

Ever. Just run a new wire or splice it from an accessible spot.

Are the kits legal? Yes.

Will they make you the hero in the short term? Yes.

Can they go bad just like any other electrical connection? Yup.

The splices will never be just behind drywall. They will be behind cabinetry, in a sub floor, or behind a mirror. It will be because some homeowner or GC is too cheap to pay for a proper repair or renovation.

Early on, I was lucky enough to experience these NM splice kits first hand, in an accessible (sort of) situation, and be witness to their failure.

The company I started working for was contracted to do the final hookup (service, etc) for prefab houses. The house would arrive in 2+ pieces, and we would build the service and make all the final connections. This included connecting these splice kits in the crawl space. The kits were already installed, and we would go under the house and connect them together.

I remember going back to one of these houses in the dead of summer because some of the kitchen receptacles weren't working. Those kits were to blame. They went bad at the connection point (not where the NM connected). I had to make and extend several extra junction boxes because the original NM was only long enough to use the kit. Not fun to do in the middle of July. I don't want to think about if one of those splices was inside some random wall.
 
#11 ·
No, as long as the rules are followed.

110.14 Electrical Connections. Because of different characteristics
of dissimilar metals, devices such as pressure
terminal or pressure splicing connectors and soldering lugs
shall be identified for the material of the conductor and
shall be properly installed and used. Conductors of dissimilar
metals shall not be intermixed in a terminal or splicing
connector where physical contact occurs between dissimilar
conductors (such as copper and aluminum, copper and
copper-clad aluminum, or aluminum and copper-clad aluminum),
unless the device is identified for the purpose and
conditions of use. Materials such as solder, fluxes, inhibitors,
and compounds, where employed, shall be suitable for
the use and shall be of a type that will not adversely affect
the conductors, installation, or equipment.
(A) Terminals. Connection of conductors to terminal
parts shall ensure a thoroughly good connection without
damaging the conductors and shall be made by means of
pressure connectors (including set-screw type), solder
lugs, or splices to flexible leads. Connection by means of
wire-binding screws or studs and nuts that have upturned
lugs or the equivalent shall be permitted for 10 AWG or
smaller conductors.
Terminals for more than one conductor and terminals
used to connect aluminum shall be so identified.
(B) Splices. Conductors shall be spliced or joined with
splicing devices identified for the use or by brazing, welding,
or soldering with a fusible metal or alloy. Soldered
splices shall first be spliced or joined so as to be mechanically
and electrically secure without solder and then be
soldered. All splices and joints and the free ends of conductors
shall be covered with an insulation equivalent to that of
the conductors or with an insulating device identified for
the purpose.
Wire connectors or splicing means installed on conductors
for direct burial shall be listed for such use.
 
#19 ·
FWIW it says "rewire", not repair.

(B) Devices of Insulating Material. Switch, outlet, and tap devices of insulating material shall be permitted to be used without boxes in exposed cable wiring and for rewiring in existing buildings where the cable is concealed and fished. Openings in such devices shall form a close fit around the outer covering of the cable, and the device shall fully enclose the part of the cable from which any part of the covering has been removed. Where connections to conductors are by binding-screw terminals, there shall be available as many terminals as conductors.
 
#17 ·
#25 ·
Hey guys, I work in hospitals, trying to learn DYI home improvement. So in my mother's home , the Romex is standard , it's rI'm done the Joost looks real good. Labeled 2017. Then at some point she had someone in who spliced 10 gauge romex and ran to light fixtures in certain areas of the house (by the front and rear doors, and every ceiling fan. I understand you can mix guages but should the splice go thru a box or at be taped ?
Thx
 
#26 ·
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