Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) (First Revision) which is identical with IEC 60079-1 : 2014 ‘Explosive atmospheres — Part 1: Equipment protection by flameproof enclosures “d” ’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on recommendation of the Electrical Apparatus for Explosive Atmospheres Sectional Committee, and approval of the Electrotechnical Division Council.

IS 2148 ‘Electrical apparatus for explosive gas atmospheres — Flameproof enclosures “d”’ was first published in 1962 and subsequently revised in 1968, 1981 and 2004. Third revision of this standard was identical with IEC 60079-1 : 2001 and published as a dual numbered standard IS 2148 : 2004 / IEC 60079-1 : 2001. Subsequently IEC 60079-1 : 2001 was revised in 2003 and in 2007. IEC 60079-1 : 2007 was adopted as IS/IEC 60079-1 : 2007 and superseded IS 2148 : 2004. The first revision of this standard has been undertaken to align it with the latest version of IEC 60079-1 : 2014.

Attention is invited to the fact that the manufacture and use of flameproof equipment in the country is controlled by the concerned statutory authorities for the area of their jurisdiction. This standard is not intended to take the place of the various statutes and regulations in force in the country applicable to the installation and use of electrical apparatus in places where there is an explosion hazard; it has been drawn up to assist the concerned authorities to have a common basis for construction and testing of apparatus required to have a flameproof enclosure.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards, the current practice is to use a point (.) as the decimal marker.