MIL-DTL-55021 Cable, Electrical, Shielded Singles, Shielded And Jacketed Singles, Twisted Pairs And Triples, Internal Hookup, General Specification ForThis specification covers electrical cables consisting of unshielded and unjacketed, shielded, jacketed, or shielded and jacketed twisted pairs and triples, and shielded or shielded and jacketed singles. The cable is intended for internal wiring of electrical equipment for application temperatures of -40 to 105 degrees Centigrade \(??C\), or -65 to 200 ??C. Cables constructed with polyvinyl chloride \(PVC\) - insulated wires or jackets are not to be used for aerospace applications.