Installing a Light Switch

Most people get cold feet at the thought of working on electrical circuits, but knowing ho to install a light switch is fairly easy and safe, with a little basic knowledge of wires. In the typical home, nearly all switches are of the single-pole variety, a control that turns the light on and off. This article will guide you on how to install a single-pole switch.

Step 1 - Turn off Power Supply

Don't ever work on a circuit that has power running to it. Turn off the supply of power that runs into the circuit on which you intend to work.

Step 2 - Remove Old Faceplate

If you are replacing a light switch, first remove the faceplate of the switch. Now, use the voltage tester to test the electrical wires that run to the current toggle, so you can be certain that they aren't powered. Place the device from the voltage tester on the grounded wire within the box, then touch the other device to the terminal screws of the switch or to the black wire which carries the electricity.  There shouldn't be a voltage registration.

Step 3 - Remove Old Switch

Remove the two screws that hold the switch firmly to the box. Gently, pull the switch out and disconnect all the wires. Now using wire strippers, remove a 1/2-inch of the insulation at the end of the wires; be certain to straighten out the end of the wires before stripping and connecting them.

Step 4 - Wiring 

You will have to connect the wires, the black ones (often referred to as "hot") to the terminal screw, it is of little matter which terminal each wire is attached to. Now connect the white wire in the outlet to the white wire from the service panel. The green wires are ground wires. Secure the grounding wire, which is green, onto the grounding switch screw. If a grounding wire is already attached to the switch, then wind the end jointly with the circuits green wire, using the pliers, and attach it with a nut or compression sleeve.

Step 5 - Mounting the New Switch

First, you must crease the wires at the back of the switch; the green wire first, followed by the white wires and lastly, the black wires. Press the switch in carefully; you may damage the wire insulation by forcing the switch into the box. If the switch isn't fitting, try to rearrange the wires as flat as possible. Next, line up the switch by readjusting the screws that are in the slots, making certain that the switch is flat to the wall. Attach and tighten the switch.

Step 6 - Finishing Up

Attach the faceplate, there should be screws provided. Last thing to do is to test your work. Turn the power supply to the circuit on and switch on the light.