Electrical Wiring Flashcards
What is the standard aviation grade wire made from?
Plated Copper Wire
What does it mean if a material is dielectric?
it is a non-conductor of electrical current
What do wires in an aircraft contain to provide flexibility and resistance to breakage?
Stranded conductors
What other properties does insulation provide, in addition to being dielectric?
Thermal protection, abrasion resistance, moisture and fluid resistance
What is shielding?
an outer conductive layer that helps eliminate, or reduce, the possibility of stray electrical currents (interference) from entering adjacent conductors.
Shielding can be found in many types of electrical systems but is routinely used in:
Navigation and communication systems
If two insulated conductors are twisted together the arrangement is known as a:
Twisted Pair
Coaxial wire is referred to as:
Coaxial cable
What insulation CANNOT be used with cables?
PVC
*releases poisonous gas when heated
The wire itself is identified by what?
markings showings the mil-spec
Can also be found on the wire spool
1(MS25190) 2(A) 3(20) 4(9) 5(1) 6(3)
What does each section identify?
1( ) 2( ) 3( ) 4( ) 5( ) 6( )
1: Mil-spec
2: Type
3: Size
4: Insulation
5: Wire Markings
6: Wire Markings
What is the preferred method of installing the identification onto the wire?
Have the identification stamped onto the wire
If the wire cannot be stamped, the tech can use sleeves to identify the wire
Which copper wire can have zero nickel or broken strands?
AN #22 - #12
What type of wire is more brittle than copper wire and more susceptible to breakage?
Aluminum wire
What tool works best for removing insulation from shielded wire?
A thermal (hot) stripper
*if this is not available
Hand strippers work for smaller gauge wire
A knife works for larger wire or cable
