ADR lighting for EX/II & EX/III vehicles: requirements and suitable lighting

Explosion-proof lighting is indispensable for vehicles transporting explosive substances. EX/II and EX/III vehicles are distinguished within the ADR classification. These vehicles require specific lighting that can operate safely in explosive environments. Standard lighting is often insufficient. Although the ADR does not explicitly refer to the ATEX Directive (2014/34/EU), in practice ATEX is often applied as additional European regulations. It is therefore essential to always check that lighting in EX zones has the correct certification.

You will read in this article:

• What EX/II and EX/III vehicles are, when explosion-proof lighting is mandatory and the role of ATEX certification.
• Information on cables, connectors, mounting, IP protection and EMC.

What are EX/II and EX/III vehicles?

According to ADR chapter 9.1 and 9.2:

• EX/II: vehicles for transporting packaged Class 1 explosive substances such as ammunition, fireworks or explosives in smaller quantities.
• EX/III: vehicles for transporting Class 1 loose or unpackaged explosive substances, often in larger quantities or in bulk.

These vehicles are classified into:

• Zone 1: explosive atmospheres occur regularly.
• Zone 2: explosive atmospheres occur rarely and briefly.

Also see our explanation of ADR lighting and regulations for the full basic rules that also apply to EX vehicles.

ATEX and lighting

In EX zones, only lighting suitable for the respective zone may be used. In practice, this often means using ATEX-certified luminaires. When choosing, pay attention to:

• Official certification in accordance with e.g. EN IEC 60079
• Coding with protection type, gas group and temperature range
• Suitability for Zone 1 or Zone 2

Always have the suitability confirmed by the vehicle inspector or competent authority before installing the lighting.

Want to know more about protection levels? Read our comprehensive guide on IP values and protection against dust and water.

The manual for installing ADR lighting tells you how to carry out mounting and cabling safely.

It is crucial to use the right, certified products for these vehicles. Discover our range of explosion-proof ATEX lighting for EX vehicles.

Cables, connectors and mounting

Additional requirements apply to EX environments:

• Use components suitable for the relevant zone
• Choose approved cable glands, connectors and sheaths
• Housings preferably made of stainless steel or coated aluminium
• Routing cables to avoid mechanical damage

AT vehicles have similar robustness requirements, see ADR lighting in chemical and gas transport.

IP protection and EMC

According to ADR, certain electrical components require a minimum protection of IP54. In practice, IP67 or higher is often recommended for explosion-proof lighting; in harsh conditions, IP68 may be desirable. In addition, lighting should comply with the ECE R10 electromagnetic compatibility standard to avoid interference. Always ensure correct earthing according to regulations.

Also discover IP and EMC requirements for FL tankers, which largely correspond to EX applications.

Frequently asked questions

What is the difference between Zone 1 and Zone 2?

Zone 1 has regular chances of explosive atmospheres; Zone 2 only rarely and short.

Is EMC mandatory for lighting in EX vehicles?

Yes. According to ADR 9.2.2 and ECE R10 regulations, electrical equipment must not cause electromagnetic interference.

Disclaimer

At TRALERT®, we do our best to keep the information in this article as accurate and up-to-date as possible, including the regulations surrounding vehicle lighting. However, legislation can change regularly, and although we make every effort to implement these changes in a timely manner, it is possible that certain updates or adjustments have not yet been incorporated into this article. We therefore always advise our readers to check the current legislation with their local government or regulatory bodies, especially when it comes to exceptions or specific national regulations. TRALERT® is not liable for any damages or fines resulting from outdated or incomplete information in this article.

If in doubt, always contact the competent authority to ensure that your vehicle meets all legal requirements.