IEC 60621-5:1987

FOREWORD
PREFACE
INTRODUCTION
Clause
1 Restrictions on access by personnel
   1.1 Access to normal operating areas
   1.2 Access to electrical operating areas and closed
        electrical operating areas
2 Operations involving personnel working in the vicinity
   of exposed live parts
   2.1 General
   2.2 Minimum approach distances
   2.3 Isolation of exposed live parts
   2.4 Work on or in close proximity to exposed live parts
3 Movement of vehicles and machinery in the vicinity of
   overhead lines
   3.1 General
   3.2 Vertical clearances
   3.3 Horizontal clearances
   3.4 Permissible reduction of clearances
4 Operations in the vicinity of collector/trolley wires
5 Alterations in the operation
   5.1 Preservation of protection
   5.2 Reduction of clearances
   5.3 Excavation near electrical installations
   5.4 Integrity of safety circuits and safety devices
6 Moving of cables
   6.1 Movable distribution cables
   6.2 Trailing cables and drum cables
7 Protection of cables
8 Moving of overhead lines
9 Electric shot-firing operations
10 Fire prevention
11 Additional requirements and precautions
   11.1 Precautions during lightning storms
   11.2 Warning notices
   11.3 Removal of guards
   11.4 Operations involving long metallic structures
12 Temporary operation of equipment
APPENDIX A - Recommended measures to minimize the possibility
             of inadvertent initiation of electrically
             initiated explosive devices