(Superseding IS 5571 : 2009 and IS/IEC 61241-14 : 2004)

Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard which is a modified adoption of IEC 60079-14 : 2013 ‘Explosive atmospheres - Part 14: Electrical installations design, selection and erection’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Electrical Apparatus for Explosive Atmospheres Sectional Committee and approval of the Electrotechnical Division Council.

As most of IEC standards concerned with explosive atmospheres were adopted by the Electrical Apparatus for Explosive Atmospheres Sectional Committee under identical adoption considering the improvement of manufacturing, operation, inspection and maintenance practices of Indian stakeholders, a need was felt to replace IS 5571 by modified adoption of IEC 60079-14 : 2013.

This standard shall supersede existing IS 5571 : 2009 ‘Guide for selection and installation of electrical equipment in hazardous areas (other than mines) (third revision)’ and IS/IEC 61241-14 : 2004 ‘Electrical apparatus for use in the presence of combustible dust : Part 14 Selection and installation’. With the publication of this standard IS 5571 : 2009 and IS/IEC 61241-14 : 2004 shall be treated as withdrawn.

IS 5571 was first published in 1970 and then revised in 2000 and 2009 to take care of latest development taking place of corresponding IEC. However, certain requirements of IS 5571 were more conservative with respect to IEC considering the maintenance practices being followed by Indian industries. Also, the base IEC standard to IS/IEC 61241-14 : 2004 has been replaced by IEC 60079-14 : 2013.

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.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain 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.