6.11 Electrical Cables & Connectors Flashcards
What are sources of electrical power?
Engine Generators, Batteries, GPU, APU, RAT
What Aircraft wires are plated with?
Nickel, to help prevent corrosion
Who gives aircraft wires specifications
Boeing,
ARINC ( Aeronautical Radio INC ),
FAR ( Federal Aviation Regs ),
CAA ( British Civil Aviation Regs )
MIL-W ( Military Wiring Spec )
ISO ( international Standards Org. )
EASA
What EASA cert is giving for large aircraft wires
CS-25
Cables must be capable of…
Carrying its rated current
Withstand voltage
Be flexible when required
withstand high heat and low temps
What is Wet Arc Tracking
Current leakage on a wet insulation surface. Temperature can get up to 1000 degrees
What is abrasion
Cable wear from friction with a surface
How do you protect cables from abrasion
P-Clamps
Cable ties
Tie cords
Tape
What is knuckling through ?
Small broken strands of wire pokes through the insulation eventually causing a short circuit
What is Red plague
When a silver plated conductor is exposed to moisture it will form a red powder
What effect does Glycol ( de-ice fluid ) have on silver plated conductors
it will contaminate the wire and can cause a fire
What 2 materials are aircraft wire made of
Copper or Aluminium
What are Conductor Plating advantages
Improved corrosion & termination techniques
Aircraft wire sizes are standardised according to:
American Wire Gauge ( AWG )
What is an Airframe cable
Open air cables exposed to elements
What is another term for cable interconnection
Hook-up list
What is Equipment cables
Used within the equipment
Data Cables are?
A twisted shielded pair of cables
What type of cable reduces data corruption
Fiber Optic
What are the two principles of current voltage rating
1- Carry current without overheat & burning
2- Carry current without major current drop
What type of wire shouldn’t be stamped
- Shielded wire
-Thermocouples
-Mulitconductor Wire
-High temperature wire
what does the Letter ‘N’ Mean in cable identification
Wire is ground
What does letter ‘V’ mean in cable identification
Wire is on a high voltage side of single phase circuit
Poor cable stripping results in?
Reduction in current capacity
Reduction in cable rating
Reduction in protection from insulation
