How To Extend Electrical Wire Inside Wall

Next run wire from the existing junction box to each box base.

How to extend electrical wire inside wall. Published on dec 30 2015 a quick demonstration on how to join up the electrical wire when cutting it and adding an extension. Wire that short can t be spliced or extended. If you don t want to re run longer cables you ll need to splice in some additional cable. The method is called a western union splice where you join two ends.

With the exception of switch boxes that do not have a neutral wire and switch controlled fixtures at the end of a circuit to extend a circuit you can simply tap into that circuit at any easily accessible receptacle switch fixture or junction box. You will need to reroute these cables to a different junction box somewhere the wiring is able reach with the needed spare length inside the box. From there you can run a 2 w ground cable to this location e g. When working with electrical you will run into a situation where someone didn t leave enough slack inside the electrical box.

Insert a clamp with wires attached into the junction box hole and from inside the box push the included nut over the wires and onto the clamp threads. The size of the wire you add must match the size of the existing wire. Avoid nicking or scratching the copper wire while removing the insulation. Cut the sheathing to remove it and strip off about 3 4 inch of the plastic insulation from the end of each wire.

You ve pretty well identified your two choices. The family handyman editor rick muscoplat shows you how to splice in jumper wires to give you the slack you need. Use the labeled notches on a wire stripper to check the gauge of the existing wire 14 gauge is most common but you may have 12 gauge wire. Splices need to be done inside a junction box and those junction box must remain accessible once the wall is closed up.