IEC 60502-2 Revised
IEC 60502-2:1997/COR1:1999
Corrigendum 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 2: Cables for rated voltages from 6 kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV)
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A more recent version of this publication exists:
IEC 60502-2:2014+AMD1:2024 CSV