A wall switch isa device mounted on a wall that opens or closes an electrical circuit to control an electric light or appliance. Common types include single-pole switches, which control a light from one location, and three-way switches, which allow for control from two locations. Modern smart switches can also offer additional features like surge protection, energy monitoring, and remote control through an app.

• Function: A wall switch makes or breaks an electrical connection to turn a light or appliance on or off.
• Single-pole switch: The most common type, controlling a single fixture from one location.
• Three-way switch: Allows for control of one light from two different locations, such as at the top and bottom of a staircase.
• Dimmer switch: A type of switch that controls the brightness of a light, rather than just turning it on or off.
• Pushbutton switch: A switch with a button that is pressed to operate, often used for doorbells or buzzers.
• Smart switch: An advanced switch that can be controlled remotely via a smartphone app and may include features like surge protection and energy monitoring.

• Installation: A wall switch is a permanent fixture, usually installed in a wall box at face level. Installation involves connecting the wires to the switch and securing it in place.
• Maintenance: Wall switches can wear out over time, and a faulty switch can cause problems like a temperamental light fixture, sparking, or a warm or hot switch.