GB 50217-2007 电力工程电缆设计规范

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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

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