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Table of Contents

Cover

Table of Contents

Foreword

1. Introduction
   1.1 Background
   1.2 Scope
   1.3 Definitions
   1.4 The dangers associated with damage to U/G cables and O/H lines
   1.5 Electricity supply in Hong Kong
   
2. Safe System of Work
   2.1 The working party's safe system of work
   2.2 Electricity supplier's responsibility
   2.3 Competent person's responsibility
   2.4 Emergency situation
   
3. Reasonable Steps for Working near Underground Electricity Cables
   3.1 Plans from electricity supplier
   3.2 Locating U/G cable alignment (passive detection)
   3.3 Trial holes (exposing cable and active detection)
   3.4 Competent person written report
   
4. Reasonable Measures for Working near Underground Electricity Cables
   4.1 Safe working practices for different types of excavation
   4.2 Safe working practices for exposing U/G cables
   4.3 Safe backfilling practices
   4.4 Safe working practices for trenchless methods/horizontal drilling
   4.5 Safe working practices for vertical penetration
   4.6 Safe working practices for other works
   
5. Special Safety Precautions against Damage to Underground Electricity Cables
   5.1 Large construction works
   5.2 U/G cable found damaged
   5.3 Doubt about identification of cables amongst different utilities
   5.4 U/G cable found in shallow cover
   5.5 Installation of plant or other utilities close to U/G cables
   
6. Reasonable Steps for Working near Overhead Electricity Lines
   6.1 Planning
   6.2 Consultation
   
7. Reasonable Measures for Working near Overhead Electricity Lines
   7.1 General safety practices
   7.2 Where no works are carried out underneath the O/H lines
   7.3 Where there will be plant or equipment passing underneath the O/H lines in the course of works
   7.4 Where works are carried out underneath the O/H lines
   7.5 Safe working practices for blasting works
   
8. Other Aspects relating to Works near Overhead Electricity Lines

Appendices

Appendix 1 - Legislation
Appendix 2 - Approval of competent person
Appendix 3 - Information on electricity suppliers

Tables

Table 1 - Works below ground level in the vicinity of U/G cables
Table 2 - Typical colours/sizes/buried depths of CLP and HEC U/G cables

Figures

Figure 1 - Works in the vicinity of overhead lines (except blasting works)
Figure 2 - Typical CLP U/G cable plan
Figure 3 - Typical HEC U/G cable plan
Figure 4 - Typical CLP O/H line alignment drawing
Figure 5 - Typical HEC O/H line alignment drawing

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