Re: JJJohnson's query on the subject.

FWIW, use MIL-W-22759/16 Tefzel insulated wire throughout and if you have
the wiring done, insist that the shop use it. Some of the older wire
specifications used PVC insulation (such as MIL-W-5086A) which is now
prohibited in Air Force (at least) aircraft due to it's propensity to
generate toxic fumes in the event of overheating or burning.

Tefzel insulation is far tougher at elevated temperatures than PVC and
doesn't cold-flow under pressure like Teflon (mainly important if a wire is
inadvertantly pulled tight across a sharp metal edge).

One source of Tefzel insulated wire is ACS there are many others.

Dan Schaefer
LNC2 (99% wired with MIL-W-22759/16)