International lightning protection standard BS EN IEC 62305 updated
The four-part international standard for lightning protection, BS EN IEC 62305, has been updated to reflect the latest expert knowledge and best practices. Together, these documents form the essential guide for anyone involved in safeguarding structures, their occupants and systems from the damaging effects of lightning.
The revision process spanned over a decade and involved industry representatives from across the globe, with ATLAS members playing a key role at every stage.
Advancing safety
Among notable improvements are a simplified risk assessment process and a move away from flash density to strike point density. The new standard also includes numerous technical and editorial adjustments to incorporate state-of-the-art knowledge and understanding.
Matt Waldram of Omega Red Group, chair of the ATLAS lightning protection committee, emphasised the significance of the update:
“ATLAS welcomes the revised lightning protection standards, developed in close collaboration with our international colleagues. We are committed to advancing technical excellence, and contributing to standards is part of how we help our industry keep pace with new developments. It’s essential to adapt our working practices to incorporate new learning, and standards offer a reliable framework to do that. I encourage all industry professionals to take note of this update.”
Newly published standard
This week, BSI published the updated UK lightning protection standards:
- BS EN IEC 62305-1:2024 – General principles
- BS EN IEC 62305-2:2024 – Risk management
- BS EN IEC 62305-3:2024 – Physical damage to structures and life hazard
- BS EN IEC 62305-4:2024 – Electrical and electronic systems within structures
ATLAS members have free access to the updated standards via BSI’s BSOL Standards Online tool.
All previous versions of these standards will be withdrawn on 31 October 2027. We are now in a transition period, during which industry professionals will adopt the new standards. Standards are not applied retrospectively, so existing lightning protection systems do not require any immediate changes.
Stay compliant with ATLAS
Lightning strikes can cause severe damage and put lives in danger. The protection measures outlined in BS EN IEC 62305 are proven to reduce the risks.
ATLAS members have the expertise to deliver comprehensive design, installation and maintenance services. For expert advice on lightning protection, contact an ATLAS contractor member.
