IS/IEC/TS 60079 : Part 42 : 2019 Explosive Atmospheres - Part 42 Electrical Safety Devices for the Control of Potential Ignition Sources from Ex-equipment
NATIONAL FOREWORD
This Indian Standard (Part 42) which is identical to IEC TS 60079-42 'Explosive atmospheres - Part 42: Electrical safety devices for the control of potential ignition sources from ex-equipment' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Electrical Apparatus for Explosive Atmosphere Sectional Committee and approval of the Electrotechnical Division Council.
This standard provides guidance for equipment manufacturers where electrical safety devices are used to reduce the likelihood of potential ignition sources becoming effective in ex equipment located in explosive atmospheres. Electrical safety devices perform a safety function to control potential ignition sources from both, electrical or non-electrical ex-equipment in explosive atmospheres.
The text of IEC standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies 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’; and
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.