Posted on 4/23/18 1:30 PM
A switch is an electrical component on a piece of equipment that may be used when incoming power needs to be controlled. From being used on a vacuum cleaner to a life-support machine, the purpose of a switch is to open and close a circuit. Opening a circuit (turns a device OFF) is achieved by breaking a connection in the circuit. This stops current flow. Closing the circuit (turns a device ON) allows the current to flow again.