Distribution cables with extruded insulation for rated voltages from 3,6/6 (7,2) kV up to and including 20,8/36 (42) kV. Part 10: XLPE insulated single core, and single core pre-assembled cables. Section E1: Cables with polyolefin compound sheath (types 10E-1, 10E-3, 10E-4 and 10E-5).