shielded cable for transporting alternating current with reduced loss of shielding

Cable (10) power for transporting a I AC at a maximum allowable working conductor T comprising: - at least two cores (12) twisted together in accordance with an arrangement of braided core and a step A braiding core, each core (12) comprising a conductor (12a) having an electrical cross-sectional area S and conductor losses when the current I is conveyed; - a shield (16) surrounding the at least two cores (12), said shield (16) comprising a layer of a plurality of wires (16a) metal wound around cores (12) according to an arrangement of winding and shield coil winding step B shielding, said shield (16) shielding losses when the current I is conveyed; said conductor losses and losses shielding contributing to total cable losses determining the maximum allowable working temperature T of the driver; wherein the arrangement of the winding of the coil shield has the same direction as the arrangement twisted core, and S cross-sectional area is such that makes the cable operating at the maximum temperature allowable working conductor T while carrying the AC with losses equal to or less shielding than 30% of the total cable losses, characterized I that step B winding shield and step a twisted core are such that a cross-C step is greater than or equal 3A being stepB shield winding different from step a braiding core in at least 10% and defining the transverse step C by the following relationship: ** ** Formula