Dr. Martin Thedens, Chair of IEC TC 31 and Head of PTB-Department 3.6, will be guiding Hazardex Live 2025 delegates through the requirements for the marking code and discuss if it is needed to reduce the marking code.

The Ex standards issued by IEC TC 31 “Equipment for explosive atmospheres” include requirements for the marking and for the nameplate of Ex Equipment and Ex Components. In theory, it is easy to define Ex Components; but in reality, the use of such components is a little bit more complex and creates a lot of confusion on the market. And even the practical use of Ex Equipment, such as junction boxes, can cause unsafe solutions. Finally, the presentation will discuss good and/or bad examples and talk about the latest developments in Europe. Maybe we can solve the question: “What is a legible and indelible marking?”.

About the author:

Dr. Martin Thedens is the Chair of IEC TC 31 "Equipment for explosive atmospheres", as well as Head of PTB-Department 3.6 "Explosion Protection in Sensor Technology and Instrumentation", Head of Sector 1 "Explosion Protection and Shooting Devices" of PTB’s Conformity Assessment Body, Chair of DKE K241 "Explosion Protected Electrical Equipment" (DE mirror to IEC TC 31), and the Immediate Past Chair of ExNBG (official group of the European Commission for the ATEX Notified Bodies).