6.11 electrical cables and connectors Flashcards
what must be payed attention to when manufacturing cables?
grate care must be taken
stringent tests
why is weight and dimensions a requirement of cables?
because aircraft has miles of cables so small reductions = big savings
what do cables have to be resistant to?
fluids
wiring is needed in high fire risk areas so what is done?
protective covering should be self extinguishing material
during changes in temperature changes the cables must remain what?
flexible
what must cables have high resistance to?
abrasion
cables should be what?
physically strong and easily workable
what is wet arc tracking?
requirement formulated to assess resistance to failure or insulation damage and fluid contamination
what are the electrical requirements of cables?
attention to providing a conductor with low volts and insulator with high insulation resistance
what is the normal current rating of a cable?
amount of current it will carry without temps enough to cause insulation resistance
how were earlier cables identified?
stamped on there outer sheath or color identification for current rating
what is cable classification based on?
American wire gauge
how are modern cables identified?
stamped on the outside
what is taken in to account when choosing the size of the cable?
electrical loading
heat generated by neighboring cables
number of cables in looms
if cable is enclosed in free air
thermal conductivity
what is a wire?
a isolate single solid conductor or standard conductor surrounded by insulation
what can a wire be made out of?
copper or aluminum and usually has a protective layer on the outside
why is aluminum and copper the chaise for wire?
low resistance and expellant conductivity
are aluminum wires used a lot?
limited and whenever replacement is nessasey
is their any speciation’s detailing aluminum is suitable for aviation use?
no
what are the disadvantages of aluminum cables?
can only carry 2/3 of the weight of the same size of copper wire
can crystalize and break under vibration
can not be smaller than 8 gauge
what is a cable?
two or more wires that are insulated separately within the same outer insulation
