IEC 60664-1 Revised
IEC 60664-1:1992+AMD1:2000+AMD2:2002 CSV/COR1:2002
Corrigendum 1 - Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests
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A more recent version of this publication exists:
IEC 60664-1:2020/AMD1:2025