[Superseding IS 2165 (Part 1) : 1977]

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) (Second Revision) which is identical with IEC 60664-1 : 2020 ‘Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests’ was adopted by the Bureau of Indian Standards on recommendation of the High Voltage Engineering Sectional Committee and approval of the Electrotechnical Division Council.

After the publication of this standard, IS 2165 (Part 1) : 1977 shall be treated as withdrawn since the requirements given in IS 2165 (Part 1) : 1977 has been covered in this standard.