GB3836.1----2000 Electric Apparatus for Explosive Gas Atmosphere Part I General Requirement (hereafter called “the Standard ”issued by the  National Technology Supervision Bureau come into effect in Aug. 1,2000.Due to long and more emendation, there are a number of changes between the Standard and GB3836.1—83 Explosion-proof Apparatus for Explosive Gas Atmosphere (hereafter called “the former Standard”).Thereby the emendation is considered eagerly .The following is the contents of main emendations:

1. Chief principle and process of the emendation
2. General Configuration and method of the emendation
3. Main differentiation between the Standard and IEC 60079—01998(hereafter called “IEC Standard” )
4. Interpreter of GB3836.1—2000 items

1   Chief Principle and Process of the Emendation
Since the promulgation of the GB 3836.1—83 Explosion-proof Apparatus for Explosive Gas Atmosphere in Aug.29 ,1983 and implement in Jan.1,1985, it has past fifteen years .From that time the Standard made great contributions to China’s development and progress of explosive-proof electric apparatus .With along of the reform and opening promotion ,science and technology progress, international exchanges increasing ,especially the development of explosion-proof electric products as well as the diversity of product structure and function, the relative international standard have been modified several times. IEC (central committee)44(1981), EN50014(1978) for example, were emended in 1992.The National Explosion-proof Electric Apparatus Standardization Technology Committee (hereafter called Standard Committee),even  proposed to amend the national standard GB3836.1~4-83 in Aug. of 1989,which wrote into the Machinery and Electronics Industry Dept.’ science & technology department plan, and numbered as 90460810.

2. General Configuration and Method of the Emendation

The general configuration is equal to those of IEC60079-0:1998 and EN50014: 1992 .There are 27 chapters with the same subjects as IEC and EN Standard. According to national present
condition the reserved items in the former standard and some IEC items needed interpret are presented in means of “footnote ”. For example, item 8.3 is explained through footnote. In IEC prescribe the item 8.1 can’t be applicable of I type portable gauge. However, the national standard has the regulation of Sort I portable or supportable electric drill, portable gage and light, which are verified from several years practice. Therefore, the regulation is much more convenient for product design and inspection. Taking item 27.1 for example, IEC Standard only show the text excluding the footnote so that lead to much contradictions in understanding “still endure and clarity under chemical erosion ”.In order to deal with the situation ,footnote is used in accordance with national requirement about scutcheon and giving more explanation of “clarity and endure ”.