How to Install a Wall Switch

Most rooms in your home have at least one wall switch that controls the flow of electricity to a light fixture or plugged-in appliance.wall switch When you "open" the circuit by flipping the switch, current flows through the wires to the fixture or outlet; when you "close" the switch, the current is interrupted and the fixture or appliance shuts off. In order to ensure the safety of your electrical system, it is important that you understand how a wall switch works and the different types available for your home.

A wall switch consists of two parts: the switch mechanism and the faceplate.wall switch The switch mechanism is the part that enables you to turn on and off a device; it can be either a traditional toggle lever or a more modern rocker arm. The faceplate covers the switch mechanism and is secured to the wall. The type of switch you choose depends on the desired function.

There are several considerations when selecting the proper switch, including: compatibility with light bulbs, level of automation, and aesthetics.wall switch Choosing a switch that is compatible with your current system can help to reduce costs and avoid unnecessary upgrades or repairs down the road. Additionally, it is important to adhere to electrical guidelines when installing new switches or replacing existing ones.

Before attempting to replace your switch, make sure that all power to the fixture or appliance is turned off at the electrical service panel. This will prevent the possibility of a fatal shock when removing or connecting wires to the old or new switch. Next, use a screwdriver to loosen the retaining screws on the top and bottom of the switch box and pull it straight out (Image 1). Note the positions of the three wires attached to the switch: a black hot wire attached to a brass screw, a white neutral wire attached to a silver screw, and a green or bare copper grounding wire attached to a green terminal screw or a strap mounted to the electrical box.

Once you've removed the old switch, use a pair of electrician's pliers to grip the ends of each wire and bend them inward into a U shape. This will allow the wires to wrap more easily around the screw terminals of your new switch. Repeat this process for the white and black wires.

If you're unable to get your switch to work properly, first check the simple things like burned out light bulbs or an overloaded extension cord that may be preventing the flow of electricity. If these are not the case, it is likely that the breaker or fuse that powers your switch circuit has tripped or blown. To determine if this is the case, head to the electrical service panel and reset the breaker or locate the fuse. Then, replace the fuse with an identical one or a new, working one. Then, test your switch by holding a battery-operated continuity tester against the screw terminals and observing whether or not a diode bulb lights up when the switch is flipped to each position.