This is a nice article that touches on the complexity of specifications for wiring harnesses used in aerospace. https://www.assemblymag.com/articles/94857-desig

This is a nice article that touches on the complexity of specifications for wiring harnesses used in aerospace. https://www.assemblymag.com/articles/94857-designing-aircraft-wire-harnesses-101 https://www.assemblymag.com/articles/94857-designing-aircraf... > In the 1970s, the most common wire for aircraft was Kapton-insulated wire. Kapton is a DuPont trade name. Today, aircraft wiring is typically insulated with Teflon, Tefzel, Cross Link Tefzel or TKT (Teflon-Kapton-Teflon). Typically, the AVS for an aircraft lists the type of wire insulation that will be used throughout the aircraft. For example, the OEM might decide that TKT will be used, with some exceptions such as radio cables and Teflon-insulated wire in boxed assemblies. I've worked with kapton tape (but never kapton insulted wire) and I can't imagine it being much good as insulation for wires. I've also worked with lots of PTFE insulated wire and it was nice to work with, but only once you'd got used to its low friction.