Once everything is secure and the wires aren’t showing any signs of fraying, replace the outer covering and secure it.ħ. You can use electrical tape or wire nuts to do this.Ħ. Secure the new Romex cable between the two existing wires. Be sure to not cut through any of the copper strands in the cable.ĥ. Cut a gap in the existing Romex cable’s outer covering and remove a few inches of it. Strip about an inch of the protective outer covering off each end of the new cable, being careful to not cut the copper strands themselves.Ĥ. Cut a piece of new Romex wire as needed to be spliced into the existing Romex wire.

Cut the Romex wires with a cable cutter, making sure that you are cutting the right length and that all of the strands of copper wiring within the cable stay intact.ģ. Secondly, use a voltage tester or similar to ensure that there is no power running to the wire before proceeding.Ģ. Start off by making sure that the power is off by flipping the breaker. Here is a step-by-step guide to help you successfully splice Romex wire in the wall:ġ. Splicing Romex wire in the wall is an important safety consideration when completing electrical projects. How do you splice Romex wire in the wall? When splicing ROMEX in a wall, always make sure that the connection box is approved for the specific type of cabling you are using, and check with your local building department or authority having jurisdiction to make sure you are in compliance with local codes. Finally, wrap the connection with electrical tape for a safe, water-resistant seal. Take a suitable size wire connector, insert the wires in one side of the connector, and tighten the screws. To complete a splice, turn off the power at the service panel, then strip back the sheathing and insulation from the cable to expose the two or three insulated wires. This type of cable is designed for indoor use in dry locations, such as the interior walls of a home or commercial building. Yes, ROMEX (now officially known as NM-B cable) can be spliced in a wall.

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Romex splice kit code