PDF Standards IEC 60502-4 Ed. 3.0 b:2010
Power cables with extruded insulation and their accessories for rated voltages from 1 kV (U<sub>m</sub> = 1,2 kV) up to 30 kV (U<sub>m</sub> = 36 kV) – Part 4: Test requirements on accessories for cables with rated voltages from 6 kV (U<sub>m</sub> = 7,2 kV) up to 30 kV (U<sub>m</sub> = 36 kV)
standard by International Electrotechnical Commission, 12/15/2010