How is LV 3C+1C, LV 3C+2C, LV 4C+1C Power cable used? LV power cables are commonly used in power systems with a voltage of 0.6/1kV. The construction generally is PVC insulated and sheathed, XLPE insulated and PVC sheathed with Cu or Aluminum conductor, armor or unarmored.It can be distinguished into LV 1C power cable, LV 2C power cable, LV 3C power cable, LV 4...