Cut the old box loose. To remove the old small gang box, pry it away from the stud slightly to expose the nail shafts and cut them with a hacksaw. Then work the wires through the box as you pull it free of the hole.

Step 2

Install the new box

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Enlarge the hole to accept a new double electrical box. Fit the wires through the box as you work it into place. Then tighten the lock wings and do the final wiring.

As a general rule, a standard 18-cu.-in. box maxes out at three 14-2 cables. (The box size in cubic inches is marked on the inside of the box.) The easiest way to accommodate the fourth cable is to install a larger box. However, you should check with your electrical inspector for a permit and approval.

Stop at a home center and buy a double-gang “old work” box (also called a “remodel box”). You can install a second receptacle in the larger box and cover it with a two-receptacle cover plate. Or you can stick with a single receptacle and use a two-piece “snap together” cover plate (with one receptacle and one blank).

Don’t Believe This Electrical Panel Myth