Electrical Cables And Connectors

Question 1

Single wire

Answer 1

Used in aircraft
Wire is only used to support the electrical current to the load and then back through the aluminium structure to the generator or battery

Question 2

Wire

Answer 2

An insulated single copper conductor surrounded by insulation.

Question 3

Copper conductor wire

Answer 3

gives Maximum wire flexibility

Are tinned which protects the wire from corrosion

Question 4

Aluminium conductors wire

Answer 4

takes a Large load

saves weight

Question 5

Electrical cables lnsulation properties

Answer 5

can with stand Voltage resistance up to 600
Resistance against aircraft fluids 
Flexible 
Strong 
Light weight

Question 6

Temature range insulation

Answer 6

Up to 100/150 degrees normal
Up to 250 degrees high temp
Up to 400 degrees fire resistance
At 1093 the degrees the insulation starts to break down after 5 minutes

Question 7

Stranded copper wire

Answer 7

Conductor most common type of wire used

Question 8

Aluminium cable conductors

Answer 8

Are Used for large loads like galleys and have some limitations of use

Question 9

wires with larger an size 8 AWG are

Answer 9

Not for use in engines
Not for use on engines
Not for used in high vibrations

Question 10

Shielded wire

Answer 10

Are used in systems to protect from any outside erratic or magnetic interference

Shielded at one side , creates a loop
Operating below 50 khz needs to be grounded at one end to prevent current back flow

Question 11

Coaxial cable

Answer 11

Used to transport high frequency
Temp range -40 to 84

Best achieved when bolt sides are grounded

Question 12

Identification code

Answer 12

Part number and system wire ID code are different
Part number from manfautre does not reflect circuit functionality
Only authorised cables
System wire ID printed on cable my company

Question 13

Part number have on

Answer 13

Wire type 
Manufacturers 
County 
Year 
Wire size

Question 14

Breaking down part number

Answer 14

Class begins with C C3
Wire size at the end
Type T4

Question 15

Wire identification

Answer 15

The circuit belongs to 
Size 
Any other information relating to the wiring diagram
Shielded or not 
Company puts on after manufacture

Question 16

Wire marking machine

Answer 16

Mechanical printing with heat ans colour foil
Ink jet - printer
C02 laser
Uv laser

Question 17

Cable

Answer 17

2 or more wires

Question 18

Wired ID

Answer 18

Wire bundle number 
System code 
Wire number 
Size 
Colour code 
In that order

Question 19

Wire marking

Answer 19

Each end within 3 inches on end

Question 20

System letter

Answer 20

2 letter system
First the system
2nd sub system
Used to identify the system by a wire

Question 21

ATA chapter 100

Answer 21

Uses numbers instead of letters

Question 22

System wire ID special

Answer 22

Sone wires cant be marked without damaging insulation
Insulation tubing will be printed before then installed on the wire

Shield wire
Thermo couple
Multi conductor wire
High temperature wire

Question 23

Current carrying capacity

Answer 23

Current capacity of a wire is dependant on the size and temp
If the temp decreases the maximum possible current in on wire will increase

Question 24

Currebt carrying capacity

Answer 24

If the temp decreases the maximum possible current in on wire will increase

Question 25

Aromatic polyamide AP

Answer 25

``` wire insulation Save weight and space Saves 50 wight and 30 space Smouldering at 815 Prone to Carbon arc tracking wet an dry causes it to blow up ```

Question 26

Dry tracking

Answer 26

Causes by a short circuit Build of of carbon desposet Causes a full power arc destroying the entire bundle

Question 27

Wet tracking

Answer 27

Aircaft fluid only

Question 28

Thermo couples

Answer 28

Egt exhaust gas themp Dissimilar metals To prevent confusion the thermo couple cable should never be red / blue insulation covering Shouts be white/ green and white/red and red/yellow Repaire alumel wires with alumel splices only Use same metal n

Question 29

Fire warning wires

Answer 29

Red or white.

Question 30

Electoral connectors

Answer 30

Used to facilitate maintenance when frequent disconnect is required Contacts are pins Plug houses the pins and receptacle housing sockets The live side has pins to stop people touching it Live side the receptacle

Question 31

Connector categories

Answer 31

Split shell | Assembled connector

Question 32

Split shell

Answer 32

Come disacempled Glass K made from steel Is fire proof Class A-D made of aluminium Identification by AN number

Question 33

Assemble connector

Answer 33

Most Common type Consist of one part Only the backing clamp is separate and has a different part number to the connector So both parts are ordered separate

Question 34

Connector insulation

Answer 34

Master key way , main grove , | The master key way should be at the top

Question 35

Contact arrangement / configuration

Answer 35

Goes anti clock wise | Every 10th contact is bracketed or dotted or circled

Question 36

Environmental sealing

Answer 36

Contact is inserted and locked Sealing across the mating faces or the plug and receptacle Sealed when a wire or seal plug installed Optimum environment seal is achieved when all 3 positions are sealed

Question 37

Seal plunged

Answer 37

Unused holes filled with nylon or Teflon in an unpresired ares In conjunction with seal plugs

Question 38

Polarisation key

Answer 38

Prevent the wrong computer being installed into a shelf. Three posts , different shapes , must match so computer can be installed Can be rotated in 6 positions

Question 39

Coaxial connectors types

Answer 39

Soldered coaxial connectors | Crimped connectors

Question 40

Connector locking

Answer 40

Connector is wire locked to keep in place in high vibrations Wire lock plug to scocked Can only wire locking stuff less than 15 cm away If receptacle has no holes for wire locking the connector can be wire locked to structure