Common Electrical Common Electrical DevicesDevices

John JonesJohn Jones

Single Pole SwitchSingle Pole Switch

Used to control a light from one locationUsed to control a light from one location

3 way Switch3 way Switch

Used to control a light from 2 locations – has 3 Used to control a light from 2 locations – has 3 terminalsterminals

Example: Light switch at each end of hallExample: Light switch at each end of hall

Use 2 3-way switches togetherUse 2 3-way switches together

Dark color terminal is “common”Dark color terminal is “common”The 2 brass screws are called “travelers”The 2 brass screws are called “travelers”

4 Way Switch4 Way Switch

Has 4 terminalsHas 4 terminals

Used with 2 3-way switches in order to Used with 2 3-way switches in order to operate the same lights from 3 separate operate the same lights from 3 separate locationslocations

ReceptacleReceptacle

Correct terminology for “plug in”Correct terminology for “plug in”

Service Entrance PanelService Entrance Panel

The origin of the electrical service for a The origin of the electrical service for a location. Sometimes referred to as the location. Sometimes referred to as the “breaker box”“breaker box”

Main DisconnectMain Disconnect

A switch that allows for the entire service to A switch that allows for the entire service to be turned off at one time.be turned off at one time.

For example, if a house caught fire, you For example, if a house caught fire, you could turn off one switch and the whole could turn off one switch and the whole house would go offhouse would go off

Emergency shop disconnects like oursEmergency shop disconnects like ours

Electrical MotorsElectrical Motors

Device that turn electrical power into rotating Device that turn electrical power into rotating mechanical energymechanical energy