When the circuit is complete so that the current can flow. Also termed "made".
When the path of current flow is interrupted. Also termed "broken".
An electric circuit that controls some major load in the system, whether it to be a relay or contactor coil or a major load.
A path for electrons to follow; the circuit may be open or closed, depending on the position of its switches.
An electric circuit that has more than on path through which electricity may flow. Designed to supply more than one load in a system.
An electric circuit that has only one path through which electricity may flow. Designed for devices that are connected in the circuit for safety or control.
An electrical circuit that has a combination of series and parallel circuits.
An electrical circuit that supplies electrical to a load or equipment.
The amount of voltage lost through any type of switching device or conductor.