EN wire and cable specifications are known as Airbus and Eurocopter wire and cables. Offered in various constructions, these parts are quickly recognizable as they all begin with the prefix EN. The EN spec can also fall under multiple categories such as hookup and airframe wires, coaxial cables, Twinax bus cables, quad Ethernet cables, optical cables, flight test cables, fire-resistant cables, power feeder cables, and some are also classified as specialty cables. European Specification Wire and Cable (EN & ASN-E) | WireMasters