A cable line includes a conduit having a tubular body, the wall of which is made of polymeric material, and an electrical cable provided with an outer sheath made of polymeric material and laid inside the conduit's body along its entire length. Herewith, the body wall is made with the provision of its electrically conductive properties, causing the possibility of current flow through the wall in the direction from its inner surface to the outer surface, furthermore the ratio of the diameter of the inner surface of the body wall to the diameter of the outer sheath of the cable is not less than 1.5.