Patent ID: 8669474

Claim:
A power cable comprising at least two power conductors, at least one earth conductor and a tubular outer jacket surrounding the power conductors and earth conductor, a semiconductive tape helically wound around the power conductors and earth conductor, each power conductor comprising a conductive core and an insulating layer surrounding said conductive core, the power conductors being twisted and contacting each other, the earth conductor having a diameter smaller than the power conductors and being positioned in an interstitial area defined between two adjacent power conductors and the outer jacket, the earth conductor contacting the two power conductors along two respective contact lines, the outer jacket having substantially constant thickness and contacting the earth conductor along an extrados portion facing outward with respect to the cable, wherein the interstitial areas between the power conductors, the earth conductor, and the outer jacket are free from other structural or filling elements and the lateral surfaces of the earth conductor are free from constraints between said contact lines with the power conductors and said extrados contacted by the outer jacket, and wherein the outer jacket is obtained by extrusion in the form of a tube and the outer jacket has a substantially rectilinear profile between a power conductor and the extrados of an adjacent earth conductor.