Cable in three-core structure

The utility model discloses a cable in a three-core structure, which comprises an inner core, wherein a wrapping covering inner lining layer, an extruding covering insulation sleeve and a polrvinyl chloride extruding covering outer protective layer are sequentially sheathed outside the inner core, wherein the inner core consists of three conductors in delta arrangement, an extruding covering shielding layer, a cross linking polrvinyl chloride insulation layer, an extruding covering insulation protective layer and a steel belt wrapping covering shielding layer are respectively and tightly covered outside each conductor, and a steel belt layer formed by winding double-layer steel belts is also arranged between the extruding covering insulation sleeve and the polrvinyl chloride extruding cover outer protective layer arranged outside the inner core. The utility model has simple structure, can be easily realized, and can effectively reduce the resistance of the cable through the three conductors in delta arrangeme