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Glossary
Key electrical terms and definitions. Use search or browse by letter.
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ac-dc
circuits
components
fundamentals
measurement
safety
A
C
D
E
F
G
H
I
K
L
M
N
O
P
R
S
T
V
W
A
Alternating Current
ac-dc
Amp
measurement
Ampacity
fundamentals
Anode
fundamentals
Arc Flash
safety
C
Capacitance
fundamentals
Capacitor
components
Cathode
fundamentals
Charge
fundamentals
Circuit
fundamentals
Circuit Breaker
components
Conductor
fundamentals
Contactor
components
Continuity
measurement
Current
fundamentals
D
Diode
components
Direct Current
ac-dc
E
Electrical Shock
safety
Electricity
fundamentals
Electromotive Force (EMF)
fundamentals
Electron
fundamentals
Energy
fundamentals
F
Frequency
ac-dc
Fuse
components
G
GFCI
safety
Ground
circuits
H
Hertz
ac-dc
Hot Wire
circuits
I
Impedance
fundamentals
Inductance
fundamentals
Inductor
components
Insulator
fundamentals
K
Kilowatt-Hour
fundamentals
L
LED
components
Load
fundamentals
Lockout/Tagout
safety
M
Motor
components
Multimeter
measurement
N
Neutral
circuits
O
Ohm
measurement
Ohm's Law
fundamentals
Open Circuit
circuits
Overload
safety
P
Parallel Circuit
circuits
Phase (Electrical)
fundamentals
Polarity
fundamentals
Power
fundamentals
PPE (Personal Protective Equipment)
safety
R
Reactance
fundamentals
Relay
components
Resistance
fundamentals
Resistor
components
S
Semiconductor
components
Series Circuit
circuits
Short Circuit
circuits
Sine Wave
ac-dc
Solenoid
components
Switch
components
T
Transformer
components
Transistor
components
V
Volt
measurement
Voltage
fundamentals
W
Watt
measurement
Wire Gauge
fundamentals