Shielded and jacketed cables with a jacket of FEP/polyimide tape, incorporating MIL-DTL-81381/11 or /12 wires. These component wires have a medium-weight insulation of three layers: polyimide/FEP tape, FEP/polyimide/FEP tape and an outer coating of modified aromatic polyimide. The component wires have silver- or nickel-plated copper conductors.