Announcement　of　Ministry　of　Construction　of　the　People　s　Republic　of　China

Foreword

1　General

2　Terms　and　Definitions

3　Selection　of　Cable　Type　and　Cross-section

• 3.1　Material　of　Cable　Conductor

• 3.2　Number　of　Power　Cable　Cores

• 3.3　Cable　Insulation　Level

• 3.4　Type　of　Cable　Insulation

• 3.5　Type　of　External　Sheath　of　Cable

• 3.6　Control　Cable　and　Metal　Shielding

• 3.7　Cross-section　of　Power　Cables

4　Selection　and　Configuration　of　Cable　Accessories

• 4.1　General　Provisions

• 4.2　Oil　Supply　Systems　of　Self-contained　Oil-filled　Cables

5　Cable　Laying

• 5.1　General　Provisions

• 5.2　Selection　of　Laying　Mode

• 5.3　Underground　Direct　Burying

• 5.4　Laying　of　Protection　Conduits

• 5.5　Cable　Structures　Laying

• 5.6　Cable　Laying　in　Other　Utilities

• 5.7　Underwater　Cable　Laying

6　Cable　Supports　and　Fixings

• 6.1　General　Provisions

• 6.2　Cable　Supports　and　Trays

7　Fire　Protection　and　Retardation　of　Cables

Appendix　A　Maximum　Allowable　Temperature　of　Common　Power　Cable　Conductor

Appendix　B　Section　Selection　Methods　for　Economic　Current　of　Power　Cable　Rated　10kV　and　below

Appendix　C　Allowable　100%　Continuous　Ampacity　of　Common　Power　Cables　Rated　10kV　and　below

Appendix　D　Correction　Factors　of　Allowable　Continuous　Ampacity　of　Cables　Under　Different　Laying　Conditions

Appendix　E　Methods　for　Calculation　of　Allowable　Minimum　Cross-section　of　Cable　Conductor　Based　on　the　Short-circuit　Thermal　Stability　Conditions

• E.1　Allowable　Minimum　Cross-section　of　Conductors　of　Solid　Insulated　Cables

• E.2　Allowable　Minimum　Cross-section　of　Conductors　for　Self-contained　Oil-filled　Cables

Appendix　F　Calculation　Formula　of　Normal　Induced　Potential　of　Metallic　Layer　of　Single-core　Cables　of　AC　System

Appendix　G　Additional　Length　of　Cables　Rated　5kV　and　Below　During　Laying　Measurement

Appendix　H　Calculation　Methods　for　Maximum　Allowable　Length　of　Conduits　in　case　of　Penetrating　Cables　through　Conduits

Explanation　of　Wording　in　This　Code