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IEC TC 31 Equipment for explosive atmospheres
IECEx Origins stem from discussions at the 1992 Brisbane meeting of IEC TC 31, where it was identified that have a suite of International standards covering technical requirements for Electrical Equipment suitable for use in areas where flammable and combustible materials may be present (Ex areas) was not sufficient, rather a harmonised way of conducting testing and certification to these standards was also desperately needed to avoid the wasteful costs and time of duplication of testing. Since that time, IEC TC 31 and IECEx have continued to work closely in providing the international community with mature and sound International Standards supported by verification services, termed IECEx Certification Schemes to provide confidence that these International standards have met.
IEC TC 105 Fuel cell technologies
Following on from the successful cooperation between IEC TC 31 and IECEx, this same model of demonstrating compliance via IECEx Conformity Assessment Services is being adopted by the Fuel Cell community, noting that similar explosion hazards exists when dealing with Fuel cells, hence the recent decision by IEC TC105 to also establish a formal liaison between IEC TC 105 and IECEx similar to that exists between IECEx and TC 31.
ISO TC 197/SC1 Formal Liaison "Hydrogen Technologies"
The cooperation between IECEx and ISO/TC 197/SC1 is set to continue noting ISO TC 197's continued work on international standards and the IECEx decision to introduce these standards into the IECEx portfolio. A formal Liaison, as a means of formalizing the ongoing cooperation between ISO 197 and IECEx, has now been established relating to testing and certification in the area of "Hydrogen Technologies". The appointment of Dr. Thorsten Arnhold, DE (Member of the IECEx Executive + WG19 Convener) as the IECEx Liaison Officer to ISO/TC 197/SC1 has been agreed upon by the IECEx ExMC Members on 2023-01-31.
ISO/TC 197/SC1 - Hydrogen at scale and horizontal energy systems. Details of the Scope and country membership of ISO/TC 197/SC1 can be found via the ISO website at