6.11 Electrical Cables & Connectors

Question 1

What are sources of electrical power?

Answer 1

Engine Generators, Batteries, GPU, APU, RAT

Question 2

What Aircraft wires are plated with?

Answer 2

Nickel, to help prevent corrosion

Question 3

Who gives aircraft wires specifications

Answer 3

Boeing,
ARINC ( Aeronautical Radio INC ),
FAR ( Federal Aviation Regs ),
CAA ( British Civil Aviation Regs )
MIL-W ( Military Wiring Spec )
ISO ( international Standards Org. )
EASA

Question 4

What EASA cert is giving for large aircraft wires

Answer 4

CS-25

Question 5

Cables must be capable of…

Answer 5

Carrying its rated current
Withstand voltage
Be flexible when required
withstand high heat and low temps

Question 6

What is Wet Arc Tracking

Answer 6

Current leakage on a wet insulation surface. Temperature can get up to 1000 degrees

Question 7

What is abrasion

Answer 7

Cable wear from friction with a surface

Question 8

How do you protect cables from abrasion

Answer 8

P-Clamps
Cable ties
Tie cords
Tape

Question 9

What is knuckling through ?

Answer 9

Small broken strands of wire pokes through the insulation eventually causing a short circuit

Question 10

What is Red plague

Answer 10

When a silver plated conductor is exposed to moisture it will form a red powder

Question 11

What effect does Glycol ( de-ice fluid ) have on silver plated conductors

Answer 11

it will contaminate the wire and can cause a fire

Question 12

What 2 materials are aircraft wire made of

Answer 12

Copper or Aluminium

Question 13

What are Conductor Plating advantages

Answer 13

Improved corrosion & termination techniques

Question 14

Aircraft wire sizes are standardised according to:

Answer 14

American Wire Gauge ( AWG )

Question 15

What is an Airframe cable

Answer 15

Open air cables exposed to elements

Question 16

What is another term for cable interconnection

Answer 16

Hook-up list

Question 17

What is Equipment cables

Answer 17

Used within the equipment

Question 18

Data Cables are?

Answer 18

A twisted shielded pair of cables

Question 19

What type of cable reduces data corruption

Answer 19

Fiber Optic

Question 20

What are the two principles of current voltage rating

Answer 20

1- Carry current without overheat & burning
2- Carry current without major current drop

Question 21

What type of wire shouldn’t be stamped

Answer 21

• Shielded wire
  -Thermocouples
  -Mulitconductor Wire
  -High temperature wire

Question 22

what does the Letter ‘N’ Mean in cable identification

Answer 22

Wire is ground

Question 23

What does letter ‘V’ mean in cable identification

Answer 23

Wire is on a high voltage side of single phase circuit

Question 24

Poor cable stripping results in?

Answer 24

Reduction in current capacity
Reduction in cable rating
Reduction in protection from insulation

Question 25

What are the 4 types of cable strippers

Answer 25

• Single blade
• double blade
• thermal
• abrasive

Question 26

After stripping a wire what must you look for

Answer 26

• Severed / Nicked strands
• Kinks
• Correct strip length
• Damage to insulation