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GB50254-2014

Chinese Standard: 'GB50254-2014'
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GB 50254-2014
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50254-2014
Code for Construction and Acceptance
of Low-Voltage Apparatus
Electric Equipment Installation
Engineering
电气装置安装工程
低压电器施工及验收规范
ISSUED ON. MARCH 31, 2014
IMPLEMENTED ON. DECEMBER 1, 2014
Issued by. Ministry of Housing and Urban-Rural Development of the
People's Republic of China;
General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China.
National Standard of the People's Republic of China
Code for Construction and Acceptance of
Low-Voltage Apparatus
Electric Equipment Installation Engineering
Chief Development Department.
China Electricity Council
Approval Department.
Ministry of Housing and Urban-Rural Development of the People's
Republic of China
Implementation Date.
December 1, 2014
China Planning Press
2014 Beijing
Announcement of the Ministry of Housing and Urban-Rural
Development of the People's Republic of China
No. 368
MOHURD Announcement on Publishing the National Standard
"Code for Construction and Acceptance of Low-voltage Apparatus -
Electric Equipment Installation Engineering"
"Code for Construction and Acceptance of Low-voltage Apparatus - Electric Equipment
Installation Engineering” has been approved as a national standard with a serial number of
GB 50254-2014 and shall be implemented on December 1, 2014. Articles 3.0.16 and 9.0.2 in
this code are compulsory and must be enforced strictly. The former "Code for Construction
and Acceptance of Low-voltage Apparatus - Electric Equipment Installation Engineering"
(GB 50254-96) shall be abolished simultaneously.
Organized by the Research Institute of Standards and Norms (RISN) of our Ministry, this
code is published by China Planning Press.
Ministry of Housing and Urban-Rural Development of the People's Republic of China
March 31, 2014
Table of Contents
Foreword ... 5 
2 Terms ... 7 
3 Basic Requirement... 9 
4 Low-Voltage Circuit-Breaker ... 13 
5 Switch, Disconnector, Switch-Disconnector and Fuse-combination Unit ... 15 
6 Residual Current Device and Surge Protective Device ... 16 
7 Contactor, Motor Starter and Frequency Converter ... 17 
8 Control Switch ... 19 
9 Low-voltage Fuse ... 20 
10 Resistor, Rheostat and Electromagnet ... 21 
11 Test ... 23 
12 Check and Acceptance of Work ... 24 
Appendix A Tightening Torques of Screw-type Terminals ... 26 
Appendix B Temperature-rise Limits of Terminals ... 27 
Appendix C Temperature-rise Limits of Accessible Parts ... 28 
Appendix D Temperature-rise Limits of Terminals and Accessible Parts for
Low-voltage Circuit-breakers ... 29 
Explanation of Wording in This Code ... 30 
List of Quoted Standards ... 31 
Foreword
According to the requirements of Document "Notice on Printing 'Development and Revision
Plan of National Engineering Construction Standards and Codes (Batch 1) in 2009'" (Jian
Biao [2009] No. 88) issued by the Ministry of Housing and Urban-Rural Development, the
former "Code for Construction and Acceptance of Low-voltage Apparatus - Electric
Equipment Installation Engineering" (GB 50254-96) was revised jointly by China Electricity
Council, Beijing Construction Engineering Group Co., Ltd and organizations concerned.
The drafting group examined and finalized this code by conducting extensive investigation
and study, summarizing practical experiences during the preparation of this code and on the
basis of extensively soliciting for opinions.
This code consists of 12 chapters and 4 appendixes with the main contents as follows.
General Provisions; Terms; Basic Requirement; Low-Voltage Circuit-Breaker; Switch,
Disconnector, Switch-disconnector and Fuse-combination Unit; Residual Current Device and
Surge Protective Device; Contactor, Motor Starter and Frequency Converter; Control Switch;
Low-voltage Fuse; Resistor, Rheostat and Electromagnetic; Test; Check and Acceptance of
Work, etc.
Compared with the former code, this revision mainly includes the following contents.
1. Two chapters -- "Terms" and "Test" were added.
2. Chapter 4 "Low-voltage Switch-disconnector, Knife Switch, Change-over Switch and
Fuse-combination Unit” of the former code was revised into "Switch, Disconnector,
Switch-disconnector and Fuse-combination Unit".
3. Chapter 5 "Household Electric Apparatus, Leakage ......
Related standard:   GB 50255-2014  GB 50256-2014
   
 
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