how to wire a light switch into an existing circuit

Changing a light switch can be a daunting task for some, but it does not have to be. Wiring a light switch into an existing circuit is not difficult and, if done properly, can save you time, money, and effort.

Installing a light switch into an existing circuit requires a few tools and supplies. You will need a knife or scissors, a voltage tester, an approved two-to-three wire terminal cable, a flathead screwdriver, and a new light switch. To start, you must shut off the power to the existing circuit. Then, mark the wires on the existing switch with electrical tape before disconnecting them. Test each wire with your voltage tester to make sure that they are dead.

Once the existing circuit is disconnected, then you can start wiring the new switch. If you’re using a two-wire terminal cable, attach the black wire to one of the screws on the side of the switch. Then attach the white wire to the other screw. If you’re using three-wire terminal cable, the procedure is similar, but the third wire should be attached to the ground screw on the back of the switch. Finally, attach the bare copper grounding wire to the ground screw. Once the switch is wired in, make sure to turn the power back on and test the switch to make sure it works.

Wiring a light switch into an existing circuit can seem like a daunting task, but it doesn’t need to be. With a few basic tools and supplies, anyone can easily install a light switch into an existing circuit. Make sure to always follow safety procedures by turning off the power before beginning any work.