A power umbilical, a DEH power cable or general umbilical, including a plurality of high power cables for transfer of large amounts of electric energy, filler material in the form of stiff elongate plastic elements located at least partially around and between the high power cables, which together are collectively gathered in a spiraled bundle by means of a laying and closing operation, and a protective sheath that encapsulates the high power cables and the filler material is shown. The high power cables are at intervals in the longitudinal direction of the cables, provided with frictional material which cooperate with the filler material for frictional engagement with and load transfer between each other.