Chapter 11, Section 4-7 Flashcards
What is the impact of shock and vibration on electromechanical switches?
They may cause excessive electrical degradation of the contacts
What is the purpose of proximity switches in aircraft?
To detect the presence of a predetermined target without physical contact
What is the recommended practice for using automatic reset circuit breakers in aircraft?
Do not use them as circuit protection devices for aircraft
What is the purpose of derating switches for low-energy loads?
To increase the life of the switch
What is the purpose of circuit protection in electrical systems?
To prevent wires from overheating
What is the maximum current that a #12 gauge wire can carry at 20,000 feet altitude and 60 °C ambient?
36.4 Amps
What are the potential risks of Electromagnetic Interference (EMI) in aircraft?
System inaccuracies or failure
What are the annual inspection requirements for aircraft wire?
Inspect for abrasions, defective insulation, condition of terminations, and potential corrosion
What is the maximum current that a #10 gauge wire can carry at 60 °C ambient?
50 Amps
What is the role of MIL-DTL-27500 in aircraft wiring?
To provide general specifications for electrical and power cables
What is the maximum acceptable voltage drop in the load circuits between the bus and the utilization equipment ground?
2%
Why must only wire specifically designed for airborne use be installed in aircraft?
In areas that require repeated bending and flexing of the wire
What is the maximum current that a #14 gauge wire can carry at 50 °C ambient?
26 Amps
What are the flammability requirements for the wires listed in the Aircraft Wire Table?
They must meet the flammability requirements of Title 14 of the Code of Federal Regulation
What potential problems can arise from using non-approved wire in aircraft?
Inferior quality and little process control testing
