GB 50217—2007电力工程电缆设计规范

Foreword

1 Genera

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 Extemal 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. I General Provisions

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

5 Cable Laying

5. I 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 10 kV and below

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

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

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

Appendix H Calculation Methods for Maximum Allowable Length of Conduits in case of Putting Cables through Conduits Explanation of Wording in This Code

Articles in bold in this code are compulsory and must be observed strictly.
　　This code is administered and explained by the Ministry of Construction of the People's Republic of China in respect of compulsory articles. The daily management of it is the responsibility of the Standardization Center of China Electricity Council. And Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation is responsible for the interpretation of the specific technical issues therein. During the implementation of the code， the interests concemed are expected to seriously summarize the experiences and collect the relevant information based on the project practices and at any time refer any comments and suggestions to Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation at the address: No.18 Dongfeng Road， Chengdu City， Sichuan Province， Postcode: 610021， for reference in the future revision of the code.
　　This code is drafted by Southwest Electric Power Design Institute， China Power Engineering Consulting Group. The participants in the development of this regulation also include Northeast Electric Power Design Institute， and HILTI (China) Ltd.