Electrical Symbol Reference
Comprehensive JIS and IEC electrical symbols for wiring and system diagrams — free electrical engineering reference
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AC Source
JIS C 0617
Represents AC power source
⎓
DC Source
JIS C 0617
Represents DC power source
─│─
Battery
JIS C 0617
Battery/accumulator
⏚
Ground/Earth
JIS C 0617
Earth/ground connection
○─/─
Single-pole Switch
JIS C 0303
Single-pole single-throw switch
○─/─○
3-way Switch
JIS C 0303
3-way switch for stairways
○─X─○
4-way Switch
JIS C 0303
4-way intermediate switch
T○─/─
Timer Switch
JIS C 0303
Timer-operated switch
◎
Duplex Outlet
JIS C 0303
Standard duplex receptacle
◎ E
Grounded Outlet
JIS C 0303
Outlet with ground terminal
◎ WP
Waterproof Outlet
JIS C 0303
Weatherproof outlet
◎ 200
200V Outlet
JIS C 0303
200V power outlet
⊙
Incandescent Light
JIS C 0303
Incandescent lamp
⊘
Fluorescent Light
JIS C 0303
Fluorescent luminaire
◇
LED Light
JIS C 0303
LED luminaire
◆
Emergency Light
JIS C 0303
Emergency lighting
○ DL
Downlight
JIS C 0303
Recessed downlight
□ L
Distribution Board
JIS C 0303
Distribution/panel board
□ C
Control Panel
JIS C 0303
Control panel
□ T
Terminal Board
JIS C 0303
Terminal board
⊂⊃
Single-phase Transformer
JIS C 0617
Single-phase transformer
⊂∨3
Three-phase Transformer
JIS C 0617
Three-phase transformer
M⃝
Motor
JIS C 0617
Electric motor
G⃝
Generator
JIS C 0617
Electric generator
□ B
MCCB
JIS C 0617
Molded case circuit breaker
□ BE
ELCB
JIS C 0617
Earth leakage circuit breaker
─◇─
Fuse
JIS C 0617
Fuse element
⚡ LA
Lightning Arrester
JIS C 0617
Lightning/surge arrester
OC⃝
Overcurrent Relay
JIS C 0617
Overcurrent relay
───
Concealed Ceiling
JIS C 0303
Concealed wiring in ceiling (solid line)
┄┄┄
Exposed Wiring
JIS C 0303
Exposed wiring (dashed line)
─·─·─
Concealed Floor
JIS C 0303
Concealed wiring under floor (dash-dot)
─··─
Underground
JIS C 0303
Underground wiring (dash-dot-dot)