a safety device consisting of a strip of wire that melts and breaks an electric circuit if the current exceeds a safe level, used to prevent electrical fires

gives the circuit a source of energy

control one electrical circuit by opening and closing contacts in another circuit

instrument used for measuring electric current in units of amperes

control the flow of current to other components

common return path for electric current, or a direct physical connection to the earth

switch that controls just one circuit

switch that controls two separate circuits

an electric switchhaving three terminals used to control a circuit from two different points