Electrical Components and Diagrams

Front

Contactors

Back

A device that opens and closes a set of electric contacts by the action of a solenoid coil; composed of a solenoid and the contacts.

Front

De-energized

Back

To stop the electron flow to an electric device.

Front

Disconnect switch

Back

A switch that is used to disconnect the power supply to a piece of equipment; it is sometimes referred to as a safety switch.

Front

Energized

Back

To apply voltage to an electric device.

Front

Factual diagram

Back

A wiring diagram that is a combination of the pictorial and schematic diagrams.

Front

Heaters

Back

An electric load that converts electric energy to heat.

Front

Installation diagram

Back

A diagram that shows little internal wiring but gives specific information as to terminals, wire sizes, color coding, and breaker or fuse sizes.

Front

Loads

Back

Electric devices that consume electricity to do useful work, such as motors, solenoids, heaters, and lights.

Front

Magnetic overload

Back

An overload device that senses the current draw of a load by the magnetic field produced, which is proportional to the current draw. The device will open a set of contacts on high current draws and allow them to close when the ampere draw returns to normal.

Front

Magnetic starter

Back

A device that opens and closes its contacts when a solenoid is energized. A means of overload protection is provided. It is the same as a contactor except for the overload protection.