How To Install A Light Switch In An Existing Wall

From the switch new 2 wire cable is run to the new light location.

How to install a light switch in an existing wall. Strip the last one inch of your new black wire and place all three black wires together. Start the light fixture installation project by turning the power off at the main electrical panel unscrewing the switch and pull it out the switch. Pull the switch out turn it on and test the terminals with a voltage tester. Pull the switch from the box and loosen the terminal screws slipping the circuit.

See the video above for more specific instructions. And you don t have to remove any drywall except for the box s cutout itself. The switch comes first in the new part of the circuit and new 2 wire cable is run to it from the outlet. Unscrew the wire nut holding the two black wires together on your existing light.

Remove the two 6 32 screws securing the switch in the box. This project guide will walk you through the process of installing the switch including wiring both the switch and the fan. Unscrew the wire nut holding the two white wires together. Shop all lighting now.

If the wall is heavily insulated push conduit through the insulation and then feed wires or cable through the conduit. Adding an electrical box to your existing wall for a switch or outlet is easy when you have the right materials and know a few tricks. Turn the power back on and use a noncontact voltage tester to locate the hot wire. Remove the cover plate from the existing light switch.

When you need to add an outlet or switch in an existing wall you need to use a special electrical box called an old work box an old work electrical box may be metal or plastic and is specially designed to be installed in an existing wall where it has no support other than the wall itself.