Step 1: Remove the Existing Switch Box
Shut off the power at the main circuit panel (Image 1).
Use an electrical tester to be sure that the power is off at the fixture.
Disconnect the wires to the old single-pole switch (Image 2).
Disconnect the wiring cables from the box.
If the old box is attached to a wall stud with nails or screws, use a pry bar or screwdriver to remove it.
Step 2: Install a Double Switch Box
Secure the new double box to the wall stud.
Step 3: Connect the Old and New Switches
Pull the existing switch wiring cables, and the wiring cable (or cables) for the fixture controlled by the new switch, into the box through separate rear access holes (Image 1). Secure the cables to the box with clamps.
Use a barrel clamp to connect the bare or green ground wires from both incoming cables.
Replace the wires to the old switch just as they were attached before.
Attach the incoming fixture wires to the new switch. This connection will depend on how the power is routed to the fixture controlled by the switch.
Install the double switch box cover (Image 2).
Restore power to both circuits and test the operation of both switches.
Was this project helpful?
Advertisement
Find inspiration or just steal ideas from the best renovations and remodels done by the DIY Network pros.
COMMENT ON THIS PROJECT
Sign in
All fields are required.
Signing in
Please enter your email address and we will send your password
E-mail Address
Your password has been sent and should arrive in your mailbox very soon.
Not a member?
Sign up with DIY Network to share tips with other do-it-yourselfers and comment and ask questions on projects.
It's free and easy.
