List of Electrical Symbols for Schematics and One-Line Diagrams
Ground Symbols
Name
Symbol
Function
Common Ground
Common reference point or digital ground
Earth Ground
True ground reference point
Chassis Ground
Relative ground reference point when Earth ground is not available
Power Source Symbols
Name
Symbol
Function
DC Voltage Source
AC Voltage Source
Alternating current power source
Current Source
Direct current power source
Static current source
Controlled Voltage Source
Controlled Current Source
Controlled voltage source
Controlled current source
Battery
Cell
Battery power source
Single cell power source
Generator
Electric generator
Ground Symbols
Name
Symbol
Function
Wire
Conductor in an electrical circuit
Wire Nodes (Joined)
Wires Unjoined
Two conductors joined in a node
Conductors unjoined in a schematic
Resistor Symbols
Name
Symbol
Function
Resistor (IEEE)
Resistor (IEC)
Potentiometer (IEEE)
Potentiometer (IEC)
Rheostat (IEEE)
Rheostat (IEC)
Thermistor
Photoresistor
Trimmer Resistor
Capacitor Symbols
Name
Symbol
Function
Capacitor (Polarized)
Capacitor (Nonpolarized)
Variable Capacitor
Inductor Symbols
Name
Symbol
Function
Inductor
Iron Core Inductor
Variable Inductor
Diode Symbols
Name
Symbol
Function
Diode
Zener Diode
Tunnel Diode
Varactor Diode
Schottky Diode
Light Emitting Diode (LED)
Photodiode
