Magnetic shielding sheath for an electrical cable

A magnetic shielding sheath for an electric cable, the sheath forming, in the mounted state, a flexible tubular casing configured to receive the cable, the sheath comprising elongated elements, such as wires or strips, which include:

• elongated elements of a first type, made of at least one electrically conductive material, wherein the sheath forms a return conductor for the current carried out by the cable housed in the sheath, such that the current flowing back in the sheath creates a magnetic field opposite to a disturbing magnetic field created by the current flowing in the cable and allows it to be partially attenuated;
• elongated elements of a second type, different from the first type, made of at least one material having sufficient magnetic properties to produce the shielding effect against the magnetic field resulting from a sum of the disturbing magnetic field and the field created by the return current in the sheath, said elongated elements being assembled in a crisscross manner and/or forming an encircling, wherein the sheath is produced in the form of an initially substantially flat sheet, capable of being wound around the cable.