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Shutting Off the Main Breaker



Electrical
...continued

Terms In Alphabetical Listings:

Amp
AFCI
Armored Cable
Ballast
Box
Branch Circuit
Bus
BX
Cable
Circuit
Circuit Breaker
Conductor
Current
Daisy Chain
Device
Feeder
Fish Tape
Fitting
Four-way Switch
Fuse
Gauge
Goof Plate
Ground
Ground Fault
GFCI
Home Run
Hot
Insulation
Junction Box
Knob and Tub

Knockout (K.O.)
Live
Lug
NEC
Neutral
Ohm
Open Circuit
Outlet
Overload
Pigtail
Polarized
Raceway
Romex®
Service Entrance
Service Panel
Short Circuit
Single-pole Switch
Split Receptacle
Three-way Switch
UL
Volt
Watt
Wire Nut®


Open Circuit
A circuit in which the flow of current is interrupted due to an open breaker or fuse. May be intentional or unintentional (as caused by a short). Back to alphabetical list


Outlet
Receptacle. Back to alphabetical list


Overload
To run equipment or wire in excess of its normal full-load rating. Back to alphabetical list


Pigtail
A short length of wire attached to an existing wire or wires. Back to alphabetical list


Polarized
A system in which the slots/blades for the hot leads are narrower than those for the neutral leads. Back to alphabetical list


Raceway
A plastic or metal channel used to conduct wires or cables from one point to another. Back to alphabetical list


Romex®
A brand of nonmetallic-sheathed cable. Back to alphabetical list


Service Entrance
The point where the electrical service enters the house, becoming your responsibility instead of the electric company's. Back to alphabetical list


Service Panel
Usually installed near the service entrance, this panel contains the main switch or breaker to disconnect the house system from the power source as well as circuit breakers. Back to alphabetical list


Short Circuit
An accidental connection between two conductors or between a conductor and ground or some other unintended surface. Back to alphabetical list


Single-pole Switch
A standard light switch with off and on positions for controlling flow of current to one or more devices. Back to alphabetical list


Split Receptacle
A receptacle in which each of the two outlets is wired on a different circuit or in which one outlet is always live and the other is switched. Also called split-wired. Back to alphabetical list


Three-way Switch
A pair of switches wired to control the same fixture or group of fixtures. Back to alphabetical list


UL
Underwriters' Laboratories is a nonprofit organization that tests electrical devices to assure their compliance with the NEC. Back to alphabetical list


Volt
The measure of electrical pressure. Back to alphabetical list


Watt
The basic measure of electricity. Amps x volts = watts. Back to alphabetical list


Wire Nut®
A brand of twist-on wire connector. Back to alphabetical list



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