Easier Installation Does Not Mean Smaller Responsibility

Newer Ex solutions can simplify installation without simplifying the operator's responsibility. Modular Ex de distribution platforms shift the emphasis onto configuration, since the certificate may cover a platform while the installed assembly stays project-specific. High ambient temperature deserves the same scrutiny, because the familiar marking check skips past the standard temperature basis of −20°C to +60°C. IECEx technical discussions and the national differences bulletin round out the picture. The closing question: when Ex equipment returns to service, what exactly is being authorized? A specific configuration, under specific environmental conditions, on a defined certification basis.

An IECEx conference badge and lanyard on a table, with attendees entering the venue for the IECEx Annual Meetings Beijing against a Beijing skyline.

Today’s useful theme is engineering change versus operational control: newer Ex solutions may simplify installation, but they do not simplify the operator’s responsibility for configuration, competence and continued safe condition.

1. Modular Ex power distribution is moving away from “everything in Ex d”

Further Ex de modular energy-distribution platforms launched in September for Zone 1/21 and Zone 2/22 applications. The concept combines different protection techniques in a configurable platform, with the aim of reducing engineering, installation and maintenance effort compared with conventional Ex d arrangements.

Why this matters: Modern modular systems can make modifications and maintenance easier - but configuration becomes increasingly important. The certificate may cover a platform, while the actual installed assembly remains project-specific.

Operational Ex comment: Treat configuration as part of the Ex-safe condition: certificate → approved configuration → installed modules → drawings → inspection → Ex Register

A later module addition or circuit modification should not become “normal electrical work.” It should trigger MoC + suitability verification + inspection + documented authorization before return to service.

2. High ambient temperature deserves more attention in equipment selection

A hazardous-area technical session held on 8 September specifically focused on Ex equipment operating at ambient temperatures up to +70°C, highlighting the effect of high ambient temperature on equipment performance, lifetime and temperature classification.

This is operationally important because the familiar marking assumption is often overlooked: the standard atmospheric temperature basis for IEC 60079 equipment is generally −20°C to +60°C, unless otherwise specified. IEC 60079-0:2026 explicitly retains this basis.

Operational Ex comment: Don’t verify only: Zone ✓ / Gas group ✓ / T-class ✓

Also verify: actual Tamb → certificate/marking → installation location → solar/process heat → operating condition

A plant modification that moves equipment closer to a hot process - or adds an enclosure or sun shield that changes heat dissipation - can become an MoC issue even though the equipment itself has not changed.

3. IECEx global technical discussions start next week in Beijing

The 2026 IECEx Annual Meetings begin in Beijing on 14 September, with ExTAG on 15 September, the Personnel Certification Committee and Industrial Symposium on 16 September, followed by ExMC meetings on 17–18 September.

For Ex professionals, ExTAG is particularly worth watching because technical interpretations and certification practice emerging through IECEx can influence how standards are applied globally.

Operational Ex comment: Standards management should not stop at purchasing IEC 60079.

A mature Ex-management system should monitor: standard editions + corrigenda + interpretation sheets + IECEx decisions/guidance + national differences

Then determine whether each development affects: EPD/HAC → equipment selection → inspection → repair → competence → procedures

4. National differences remain relevant even with an IECEx certificate

IECEx maintains an Online Bulletin of National Differences, allowing users to check whether countries fully accept particular IEC standards or apply national differences. IECEx states that the system is intended to provide an up-to-date country-by-country view.

Why this matters: “IECEx certified” does not automatically answer every local-compliance question.

Equipment can be technically suitable under IECEx while additional national requirements still affect installation, approval or use.

Operational Ex comment: For internationally sourced Ex equipment, procurement should include: IECEx certificate → destination country → national differences → local ATEX/regulatory requirements → installation requirements → acceptance

This belongs upstream in purchasing - not after the equipment arrives on site.

Today’s Operational Ex takeaway

A useful question for the Head of Operations is: “What exactly are we authorizing when we return Ex equipment to service?”

We are authorizing a specific configuration, under specific environmental conditions, installed according to specific requirements, with a defined certification and regulatory basis.

So the practical lifecycle remains: Select → configure → install → inspect → document → authorize → operate → control change.

Operational control keeps it valid in the real plant.