Commonly Used Electrical Symbols & Terms
+
-
Battery
Fuse
Normally Closed
Push-Button Switch
Normally Open
Switch
M1
Relay Coil
(Part 1 of Relay)
Circuit Breaker
Motor
Solenoid (Valve
or Actuator)
Horn or Alarm
Lamp
(Light Bulb)
Wires Connected
Together
Normally Open
Push-Button Switch
Wiring Color Codes
(Unless otherwise marked)
0
1
2
3
4
5
6
7
8
9
Tan
Pink
Brown
Orange
Yellow
Green
Blue
Purple
Gray
White
Right Most Digit
of Wire Number
Color of Wire
Example of Wiring Numbers & Colors:
1 RED
25
7
13 BLK
Relay Contacts (Part 2 of Relay)
Normally Open
Normally Closed
Normally Open
Limit Switch
Normally Closed
Limit Switch
Indicates Component
is Energized
Plug-in
Connection
NOTE: The term “NORMALLY” refers to the components’ “at rest” or “de-energized” position
Diode
Wires Not
Connected Together
Terms & Abbreviations
BDI – Battery Discharge Indicator
Dynamic Braking – A method of using the generating nature of an electric motor to slow the machine
Hall Effect – A voltage developed as a result of current flow in the presence of a magnetic field
LED – Light Emitting Diode
PM – Permanent Magnet
PWM (Pulse Width Modulation) – A method of using controlled on/off times to regulate the voltage and current supplied to an
electrical device
Indicates Movement
from Normal Position
Indicates Component in
Position Other than Normal
Wiring Standoff
(Connection Point)
28
R14 1032129 REV.01 (12-06)
