What is the purpose of the terminals on a switch or receptacle?

The purpose of the terminals on a switch or receptacle is to serve as the points of contact or interface with wire. This is crucial in electrical systems as the terminals are where the electrical connections are made. Wires connect to these terminals to either complete a circuit, allowing current to flow through the switch or receptacle, or to provide power to devices.

Each terminal typically has a specific function, such as connecting the power supply or connecting the load. For instance, in a light switch, the terminals allow the switch to open or close the circuit, thereby controlling the flow of electricity to a light fixture. Similarly, in a receptacle, the terminals enable the connection of electrical devices to the power supply safely and securely. Understanding this function is fundamental for anyone working with electrical installations, as improper connections can lead to malfunction, shock hazards, or fire risks.