Avionics Electrical Wiring Standards
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Questions and Answers

What is a critical factor in determining the wire size for an electrical circuit?

  • The color of the wire insulation
  • The type of connector used
  • The estimated or measured conductor temperature (correct)
  • The length of the cable in meters

    • What is the primary purpose of crimping in electrical cables?

  • To secure the wire to the connector (correct)
  • To increase the current carrying capacity
  • To reduce the voltage drop
  • To reduce the wire length

    • What is the significance of high tension cables in aircraft electrical systems?

  • They are used for audio signals
  • They are used for power distribution only
  • They are used for low voltage applications
  • They are used for high voltage applications (correct)

    • What is the purpose of wire bundling in electrical circuits?

    <p>To organize and protect the wires</p> Signup and view all the answers

    What is the significance of derating in wire selection?

    <p>It accounts for the reduction in current carrying capacity due to environmental factors</p> Signup and view all the answers

    What is the maximum operating temperature that electrical cables should be designed to withstand?

    <p>Depends on the specific application</p> Signup and view all the answers

    What is the primary purpose of considering wire size in electric power transmission?

    <p>To minimize electrical energy converted into heat</p> Signup and view all the answers

    What happens when current is drawn through an insulated conductor?

    <p>The heat generated is not so readily removed</p> Signup and view all the answers

    Why is wire derating necessary when wires are installed in conduit and/or bundle?

    <p>Because the heat generated in the conductor is not so readily removed</p> Signup and view all the answers

    What is the effect of a wide variation in the IR drop in the line?

    <p>Poor voltage regulation at the load</p> Signup and view all the answers

    What is the purpose of reducing either current or resistance in wire size selection?

    <p>To reduce the power loss in the line</p> Signup and view all the answers

    What is the range of typical wire sizes?

    <p>From number 40 to number 0000</p> Signup and view all the answers

    What is the primary reason to limit the current through a conductor?

    <p>To protect the insulation from excessive heat</p> Signup and view all the answers

    What is a consideration when selecting wire sizes smaller than #20?

    <p>The mechanical strength and installation handling</p> Signup and view all the answers

    Why should wires smaller than size #20 be grouped with at least three other wires?

    <p>To reduce the effects of vibration and flexing</p> Signup and view all the answers

    What is the relationship between the current carrying capacity of a wire and the related connector?

    <p>The wire may be capable of carrying more current than the contacts of the related connector</p> Signup and view all the answers

    What is the maximum operating temperature of a wire determined by?

    <p>The type of conductor insulation being used</p> Signup and view all the answers

    What should not be exceeded when operating a wire?

    <p>The current that causes a temperature steady state condition</p> Signup and view all the answers

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