A cable for conveying both electrical power and optical signals, the cable having an electric conductor with insulation therearound, a sheath around the insulation, a one or two part protective layer around the insulation, a tube within the protective layer and at least one optical fiber loosely received in the tube. The protective layer can have armoring therearound and in this case, the radial thickness of the protective layer is from two to four times the diameter of the tube.