Cable in four-core symmetric structure

The utility model discloses a cable in a four-core symmetric structure. The cable comprises an inner core, a lining layer, a steel band layer and a PVC (polyvinyl chloride) sheath are orderly sheathed outside the inner core, the inner core consists of four conductors, and cross-linked polyethylene insulation layers are tightly wrapped outside the conductors. The utility model has the advantages of simple structure and easy realization. The inner core consists of four conductors of same shape and fan-shaped cross sections. The whole cable resistance is effectively reduced, the cost is low, power waste in power transmission process is largely reduced, and power transmission efficiency is improved.