Foreword

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（3-110kV），in response to the Notice on Printing and Distributing the Preparation and Revision Plan of National Standards for Engineering Construction 2004（Jianbiao［2004］No.67）issued by the former Ministry of Construction.

During the revision process，the drafting 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 concerned and learned advanced design ideas all over the world.This revision not only retains the applicable articles in the original code but supplements some new articles.

This code is organized into seven chapters and two appendixes.The main contents include General，General Provisions，Environmental Conditions，Selection of Conductors and Electrical Equipment，Switchgear，Gas Insulated Metal Enclosed Switchgear（GIS），Requirements of Switchgear on Buildings and Structures.

Articles in bold in this code are compulsory and must be observed strictly.

The Ministry of Housing and Urban-Rural Development of the People's Republic of China is responsible for administering this code and interpreting the compulsory articles.The Northwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation is responsible for interpreting the specific technical contents herein.During the implementation of this code，the interests concerned are expected to seriously summarize the experiences and refer any comments and suggestions on modification or supplementation hereof to the Northwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation at the address:South Tuanjie Street No.22，High and New Technology Industrial Development Zone，Xi'an City，Shaanxi Province，Postcode 710075，for reference in the future revision.

The leading drafting organization and authors of this code:

Leading drafting organization:Northwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation.

Leading authors:Zhang Fengmi，Cao Yongzhen，Zhang Xiaojiang，Yang Yuehong，Shi Dong，Sun Jin and Ouyang Cefei.

This code is translated by SUNTHER Translation & Solutions under the authority of China Electric Power Planning & Engineering Association.