Switches are designed to break or complete an electrical circuit. They should be fitted to the live wire of the appliance according to your Mooresville NC electrician.
For example, if an electrical fault causes the metal casing of an appliance to be at high voltage, a switch on the live wire is able to disconnect the voltage supplied to the metal casing. A switch fitted to the neutral wire does not prevent electric shocks, while a switch fitted to the live wire does.
Switches enable to either manually disconnect the circuit for saving energy or other purposes, as well as are automatically switched off if there’s an electrical fault. The outer part is insulated with plastic, as to prevent the flow of electricity towards a person.