IEC 60079 Updates You Should Act On in 2026: What HazLoc Manufacturers Need to Know

Standards for equipment used in hazardous locations continue to evolve, and the coming 2026–2027 window represents one of the most active update cycles in recent years. Several parts of the IEC 60079 series are being revised, newly published, or prepared for harmonisation with the ATEX Directive. These developments have direct consequences for manufacturers, design engineers, and compliance managers seeking to maintain uninterrupted global market access.

Getting ahead of these changes is not only good practice — it prevents redesign delays, certification bottlenecks, and documentation gaps.

Why the IEC 60079 Series Matters More Than Ever

The IEC 60079 standards are foundational to electrical equipment intended for explosive atmospheres. They define how equipment is designed, constructed, tested, documented, and maintained so that ignition hazards are controlled throughout its life cycle. Any update to these standards can influence:

• Component selection
• Separation distances
• Test methods
• Fault considerations
• Marking and documentation
• Quality assurance and factory controls

Manufacturers who monitor and act on these updates early will maintain smoother certification efforts under ATEX, IECEx and North American HazLoc schemes.

Key IEC 60079 Developments Impacting 2026 Projects

Intrinsic Safety — IEC 60079‑11 Edition 7

The latest edition brings several important refinements to the “Ex i” protection concept. Some of the most impactful changes include:

• Updated requirements for separation distances and fault assessment, especially for Ex ic.
• Clarified conditions when reduced separations rely on enclosure IP ratings.
• Strengthened rules for PCB track spacing and copper thickness when claiming infallible connections.
• Updated test requirements for batteries, cells, and related components, including defined temperatures and additional samples.
• Restrictions on catalytic sensors for specific gas groups due to demonstrated ignition risks.

For ATEX, the European adoption (EN IEC 60079‑11:2024) is published, but harmonisation in the Official Journal is pending. Until cited, the older EN 60079‑11:2012 remains the presumption‑of‑conformity reference. A transition period is expected once citation occurs.

Bottom line:
If you produce intrinsically safe equipment, you should already be reviewing your designs and documentation for Edition 7 alignment.

Type “n” Protection — IEC 60079‑15 Amendment

An updated amendment aligns the European annexes with ATEX requirements to support OJEU citation. This helps ensure clarity for Zone 2 equipment strategies and supports manufacturers relying on Ex n for cost‑efficient designs.

General Requirements — IEC 60079‑0 Edition 8 (Upcoming)

Edition 8 is one of the most influential updates because it applies across many protection types. Expected changes affect:

• Marking conventions
• Material requirements
• Construction details
• Operating conditions and extended temperature ranges
• Verification and testing obligations

Early preparation is essential — once published, Edition 8 will become the baseline for future conformity assessments.

Encapsulation — IEC 60079‑18:2025 (Edition 5)

Updated requirements for encapsulation “m” reinforce:

• Curing conditions and material specifications
• Fault considerations for Ex mc
• Clearer criteria that component ratings must not be exceeded
• Additional documentation and verification expectations

If you use epoxy or potting compounds, this edition significantly impacts your material control and production routines.

Repair & Overhaul — IEC 60079‑19

Although often overlooked, this standard is critical for lifecycle compliance. It helps ensure that repaired or refurbished Ex equipment maintains its certified safety integrity. Service providers and operators should verify that maintenance procedures are aligned to the newest edition.

Equipment Assemblies — IEC 60079‑46

Assemblies — such as skids, systems, and integrated packages — must be assessed not only component‑by‑component but also as complete units. The standard formalises:

• Ignition hazard assessments at assembly level
• Clear documentation of risks mitigated by the manufacturer vs. those requiring mitigation at installation
• Marking rules, including “X” conditions where relevant

This is particularly important for OEMs producing integrated systems or panel assemblies.

 

Additional IEC 60079 Standards Advancing Through IECEx Committees 

• IEC 60079‑0 Edition 8 – Explosive atmospheres — Part 0: General Requirements

• IEC 60079‑1 Edition 8 – Explosive atmospheres — Part 1: Equipment Protection by Flameproof Enclosures “d”

• IEC 60079‑2 Edition 7 – Explosive atmospheres — Part 2: Equipment Protection by Pressurized Enclosure “p”

• IEC 60079‑26 Edition 5 – Equipment with Separation Elements / Combined Levels of Protection

• IEC 60079‑28 Edition 3 – Protection of Equipment and Transmission Systems Using Optical Radiation

• IEC 60079‑29‑0 Edition 1 – Gas Detection Equipment — General Requirements & Test Methods

• IEC 60079‑42 Edition 1 – Electrical Safety Devices for Potential Ignition Sources for Ex Equipment

• IEC 60079‑46 Edition 1 – Equipment Assemblies

Practical Steps for Manufacturers in 2026

1. Map Your Certificates and Referenced Editions

Create an overview of every product and the exact IEC/EN editions referenced in its documentation. This makes it easy to understand which updates will trigger redesign or retesting.

2. Conduct a Gap Analysis

Assess your designs against the updated clauses. Prioritise areas known to change technically: intrinsic safety, encapsulation, flameproof joints, and assemblies.

3. Monitor EU Harmonisation

For ATEX, the harmonised standard is the legal anchor. Track OJEU updates to anticipate when older editions lose presumption of conformity.

4. Update Documentation Early

Technical files, EU Declarations of Conformity, marking plates, installation instructions, and QA procedures should reflect the upcoming editions well before the transition deadlines.

5. Design New Products to the Latest IEC Editions

Even if ATEX harmonisation lags behind, designing to the latest IEC editions reduces long‑term certification costs and avoids future redesign cycles.

Forward‑Planning Minimises Risk

Standard evolution is essential for improving safety in hazardous environments, but it also introduces complexities for manufacturers. The organisations that succeed are those that act early:

• They understand upcoming changes.
• They adjust designs proactively.
• They update documentation before it becomes urgent.
• They work closely with certification partners to stay ahead.

How Nemko Supports Your Transition

Nemko provides complete global support across ATEX, IECEx, and North American HazLoc, including:

• Design reviews for upcoming standard changes
• Technical gap analyses and advisory
• Testing and evaluation to the latest IEC 60079 series
• ATEX Notified Body services (NB 0470)
• IECEx certification and QAR/QAN services
• NRTL and SCC certification for US/Canada
• Factory inspections and lifecycle compliance services

Whether you are updating a single product or planning a portfolio‑wide revision, Nemko helps you navigate changes efficiently and confidently.