NSAI wishes to advise that ET 105:2011 “National Rules for Electrical Installations in Potentially Explosive Atmospheres – Third edition” has now officially been withdrawn (but is still available for sale for consultation) due to its outdated content and references. We would advise anyone with an interest in this area to refer instead to the current series of Irish Standards I.S. EN 60079. The following parts are of particular importance:
Part 14: Electrical installations design, selection and erection
Part 17: Electrical installations inspection and maintenance
Part 19: Equipment repair, overhaul and reclamation
More Information About I.S EN 60079
This stadard gives guidance for the application of electrical resistance trace heating systems in areas where explosive atmospheres may be present, with the exclusion of those classified as requiring EPL Ga/Da (traditional relationship to Zone 0 and Zone 20 respectively).