PDF Standards IEC 60502-2 Ed. 3.0 b:2014
Power cables with extruded insulation and their accessories for rated voltages from 1 kV (<i>U</i><sub>m</sub> = 1,2 kV) up to 30 kV (<i>U</i><sub>m</sub> = 36 kV) – Part 2: Cables for rated voltages from 6 kV (<i>U</i><sub>m</sub> = 7,2 kV) up to 30 kV (<i>U</i><sub>m</sub> = 36 kV)
standard by International Electrotechnical Commission, 02/20/2014