Electrical – way to simply splice in an additional length of 12/2 NM-B cable

electricaljunction

Is there a way without using junction boxes to simply splice in additional length of 12/2 NM-B cable? Can I use twist caps?

I'm putting in a dog door and as it so happens, there is some 12/2 right in the way of the location I've chosen. There's no additional slack in the cable, and I don't want to rip up more drywall than I have to. I'm tempted to just cut it and splice in an additional foot or two with twist caps to get it out of the way. I don't know if this is safe or legal. Do I need to get junction boxes? Attached some pictures for fun.

Also, there is a 1-gang electrical outlet box that is going to the outside. I'm moving that up a bit.

View of the hole with the NM-B in the upper left
Close up of the cable

Best Answer

Tyco makes NM splices which are concealable and acceptable under NEC for use for rewiring in an existing building.

NM Cable Splices

enter image description here

NEC 2008

334.40 Boxes and Fittings.

(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.

Related Topic