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Video:How to Add an Outlet to an Existing Wall

with Steve Fraasa

Add an outlet to an existing wall so that you can create electrical access in a different room. Here is a step-by-step demonstration on how to add an outlet to an existing wall.See Transcript

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Transcript:How to Add an Outlet to an Existing Wall

This is Steve Fraasa for About.com. Today we are going to learn how to add an outlet to an existing wall.

Turn Power Off to Add an Outlet to an Existing Wall

These are the tools that you'll need. We want to add an outlet to the ground floor. We have no attic access and we have no access below the house because we have a concrete floor. We want to add an outlet to the pantry behind this wall so we are going to tap into an existing outlet.

We need to turn power off so I'm going to use a device that allows me to check the circuit. Switch off the power and then plug in your volt meter to insure there is no power.

Measure the Box to Add an Outlet to an Existing Wall

Next you want to measure the distance from the inside of the box to the wall so you can match this on the other side of the wall. There is not enough depth in this wall to put the two boxes back to back so we will have to make an adjustment.

You also want to measure the height of the box so that you can match that.Once inside the pantry we will measure to ensure that we are matching the distance. In this case we are going to subtract four inches to prevent us from placing the box back to back. You want to level your box.

Cut Out the Box to Add an Outlet to an Existing Wall

Next you want to draw an outline so that you can cut around the box. Do not cut around the tab because that will sit flat against the wall as you will see later. Drill a hole for access into the wall. Using a wooden stick I can probe inside the wall just to make sure there is nothing back there.

Drill holes in the corners to make cutting easier and then we will take a dry wall saw and cut out the opening. Ensure that your box will fit properly, in this case it does. As you can see those tabs as I mentioned earlier, are sitting flush against the wall.

Attach the Box to Add an Outlet to an Existing Wall

This is a box designed for Romax. So, you can slide your Romax through this access here and then you will be able to retrieve it on the other wall by pulling it through the hole you made. You can feed the Romax into this box also designed for Romax wire. Slide the wire inside the box. This particular type of box has tabs that will tighten against the back side of the dry wall so the box does not fall out.

Once you have inserted it you tighten the screws that will spin those tabs into place and tighten them against the back of the wall. Next you want to remove the Romax sheathing. This is a tool designed for stripping Romax.

Attach the Wiring to Add an Outlet to an Existing Wall

Here you want to attach the ground wire making a clockwise loop so when you tighten the screw it tightens the wire rather than loosing it. The neutral, the same case, will go onto the silver terminals. And the last wire, the hot wire, will attach to the brass color screw. Putting the receptacle back into the box, tightening it and then we will make our connections on the other side of the wall.

Here we connect the neutral wire to the other neutral wires in the box, add your black wire to the black wire bundle and secure it with wire nuts. On the ground wire you can connect it to the existing ground wire.

Now put the receptacles back into the wall, turn on your power. Test to ensure you have the proper voltage. You also want to test not only from the hot wire to the neutral but also to the ground. For more information on this, go to About.com.
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