Water resistant cable construction

The method of manufacturing a high voltage, high power water resistant cable, comprising:

• a) providing at least one electrical cable core conductor;
• b) extruding at least one layer of insulation around said at least one core conductor;
• c) forming a metal shield layer overlying said extruded insulation layer;
• d) extruding a semiconducting layer so as to encapsulate said shield layer;
• e) forming an elongated metal foil moisture barrier around said semiconducting layer;
• f) overlapping said moisture barrier along the edges thereof;
• g) extruding an outer covering of protective, insulating plastic over said moisture barrier;
• and,
• h) permanently sealing the overlapping edges of the moisture barrier by the latent heat of one of said extrusion steps.

A water resistant cable which includes an insulation layer;

• an electrically conducting shielding overlying said insulation layer;
• a semiconducting layer encapsulating said shielding;
• an elongated moisture barrier comprising a metal foil face and a plastic layer face, said moisture barrier having overlapping edges;
• and an outer layer of insulation extruded overall, wherein said moisture barrier encircles said semiconducting layer such that the metal foil face is in electrical contact therewith and the overlapping edges are not sealed to one another.