This 20 gauge black wire features standard tin-plated copper conductor with tefzel insulation.
Our 20awg black Tefzel wire is rated for 7.5 amps, 600 volts rms and 150 degrees C.
Furthermore, the FAA AC43.13-1B recommends 7.5 amp CB protection for 20 awg wire.
See FAA AC 43.13-1B Tables 11-3 & 11-9 for protection & rating details.
In addition, see Military Specification Sheet MIL-W-22759-16a for wire construction details.