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9/8/98 AC 43.13-1B
Par 11-271 Page 11-105
SECTION 20. ELECTRICAL AND ELECTRONIC SYMBOLS 11-271. GENERAL. The electrical and elec-tronic symbols shown here are those that are likely to be encountered by the aviation mainte-nance technician. They are in accordance with ANSI-Y32.2-1975.
11-272. SYMBOLS. Only those symbols as-sociated with aircraft electrical and electronic wiring have been listed in general. Refer to ANSI-Y32.2-1975 for more specific detail on each symbol.
TABLE 11-27. Electronic/Electrical Symbols.
Symbol Meaning
Adjustability Variability
Radiation Indicators
Physical State Recognition
Test-Point Recognition
Polarity Markings
Direction of Flow of Power, Signal, or In-formation
Kind of Current
Envelope Enclosure
Shield Shielding
Special Connector or Cable Indicator
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AC 43.13-1B 9/8/98
Page 11-106 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Resistor
Capacitor
Antenna
Battery
Thermal Element Thermomechanical Transducer
Thermocouple
Spark Gap Ignitor Gap
Continuous Loop Fire Detector (Tempera-ture Sensor)
Ignitor Plug
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-107
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Transmission Patch Conductor Cable Wiring
Distribution Lines Transmission Lines
Alternative or Conditioned Wiring
Associated or Future
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AC 43.13-1B 9/8/98
Page 11-108 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Intentional Isolation of Direct-Current Path in Coaxial or
Waveguide Applications
Waveguide
Strip-Type Transmission Line
Termination
Circuit Return
Pressure-Tight Bulkhead Cable Gland Cable Sealing End
Switching Function
Electrical Contact
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-109
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Basic Contact Assemblies
Magnetic Blowout Coil
Operating Coil Relay Coil
Switch
Pushbutton, Momentary, or Spring-Return
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AC 43.13-1B 9/8/98
Page 11-110 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Two-Circuit, Maintained, or Not Spring-Return
Nonlocking Switching, Momentary, or Spring-Return
Locking Switch
Combination Locking and Nonlocking Switch
Key-Type Switch Lever Switch
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-111
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Selector or Multiposition Switch
Safety Interlock
Limit Switch Sensitive Switch
Switches with Time-Delay Feature
Flow-Actuated Switch
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AC 43.13-1B 9/8/98
Page 11-112 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Liquid-Level Actuated Switch
Pressure- or Vacuum-Actuated Switch
Temperature-Actuated Switch
Thermostat
Flasher Self-Interrupting Switch
Foot-Operated Switch Foot Switch
Switch Operated by Shaft Rotation and
Responsive to Speed or Direction
Switches with Specific Features
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-113
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Governor Speed Regulator
Relay
Inertia Switch
Mercur Switch
Terminals
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AC 43.13-1B 9/8/98
Page 11-114 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Cable Termination
Connector Disconnecting Device
Connectors of the Type Commonly Used for Power-Supply Purposes
Test Blocks
Coaxial Connector
Waveguide Flanges Waveguide Junction
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-115
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Fuse
Lightning Arrester Arrester
Gap
Circuit Breaker
Protective Relay
Audible-Signaling Device
Microphone
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AC 43.13-1B 9/8/98
Page 11-116 Par 11-272
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Handset Operator’s Set
Lamp
Visual-Signaling Device
Mechanical Connection Mechanical Interlock
Mechanical Motion
Clutch Brake
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9/8/98 AC 43.13-1B
Par 11-272 Page 11-117
TABLE 11-27. Electronic/Electrical Symbols (continued).
Symbol Meaning
Manual Control
Gyro Gyroscope
Gyrocompass
Position Indicator
Fire Extinguisher Actuator Head
Position Transmitter
Radio Station
Space Station
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AC 43.13-1B 9/8/98
Page 11-118 Par 11-272
Integrated Circuit
Amplifiers
Logic Gates
Diode
Transistor Symbols
11-273.11-283. [RESERVED.]