This code is revised by the Northwest Electric Power Design Institute of the China Power Engineering Consulting Group Corporation from the original national standard， GB 50060-1992 Design Code for High Voltage Electrical Installation （3-110 kV）， in response to the Notice on Printing and Distributing the Preparation and Rewsion Plan of National Standards for Engineering Construction 2004 （JB） [2004] No. 67） issued by the former Ministry of Construction.During the revision process， the panel has made extensive investigation and research， seriously summarized the experiences gained from implementation of the original code， incorporated the comments from the domestic interests concemed and learned advanced design ideas all over the world. Tlus revision not only retains the applicable articles in the original code but supplements some new articles.
Foreword 1 Genera 2 General Provisions 3 Environmental Conditions 4 Selection of Conductors and Electrical Equipment 4．1 GeneraI Provisions 4．2 Selection of Conductors 4．3 Selection of ElectricaI Equipment 5 Switchgear 5．1 Safety Clearance of Switchgear 5．2 Type Selection of Switchgear 5．3 Arrangement of Switchgear 5．4 Accesses and Fences within Switchge 5．5 Fire Protection and OiI Storage Facilities 6 Gas Insulated Metal Enclosed Switchgear (GIS) 7 Requirements of Switchgear on Buildings and Structures 7．1 Requirements Imposed by Indoor Switchgear on Buildings 7．2 Requirements Imposed by Outdoor Switchgear on Structures 7．3 Requirements Imposed by Indoor GIS on Buildings Appendix A Long-Term Allowable Ampacity of Rectangular Aluminum Conductors Appendix B Pollution Classification Standard for Lines， Power Plants and Substations Explanation of Wording in This Code
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