Relay Circuits Technical Literacy List
Here is a list of technical terms associated with relay circuits for this online
course. As you read through the list, stop to look up any you do not understand.
A complete literacy list is available for electricians at the Apprentice
Level,
Journeyman Level and Masters Level. Click on the level you need.
circuit
closed
closed circuit
closed contacts
complete circuit
coil
coil voltage
complete circuit
contactor
contacts
continuous load
control relay
control transformer
control voltage
CR
CR contacts
deenergized
dependent operation
dpdt
dpst
electrical interlock
electromechanical
energized
F
forward
F jog mode
F run mode
holding circuit
holding contacts
inch operation
independent operation
indicator lamp/light
jog
jog mode
jog operation
jog switch
L1 L2 L3
ladder diagram
lighting contactor
limit switch
line voltage
low voltage
M magnetic coil
master switch
mechanical interlock
momentary contact
multiple start buttons
multiple stop buttons
n. c. (nc)
n. o. (no)
normally closed
normally closed contacts
normally closed push button
normally closed terminals
normally open
normally open contacts
normally open pushbutton
normally closed terminals
OL's
open circuit
open contacts
open circuit
open relay coil
opposite set of contacts
OR operation
order of operation
overloads
overloads in parallel
overloads in series
photo cell
pilot light
PLC
pushbutton
pushbuttons in parallel
pushbuttons in series
R
relay
relay logic
reverse
R jog mode
R run mode
run
run mode
run operation
run switch
S
selector switch
sequence operation
schematic diagram
short circuit
spdt
spst
start pushbutton
start pushbutton in parallel
start pushbutton in series
stop pushbutton
stop push button in parallel
stop pushbutton in series
T1 T2 T3
three wire control
timer
timer contacts
timer motor
two wire control
VAC
VDC
wiring diagram
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