Historical
IEC 60502-1 Amd.1 Ed. 2.0 b:2009
"Amendment 1 - Power cables with extruded insulation and their accessories for rated voltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) - Part 1: Cables for rated voltages of 1 kV (Um = 1,2 kV) and 3 kV (Um = 3,6 kV)"
Content Provider
International Electrotechnical Commission [iec]