IEC 62305-3 classifies protection efficiency into four distinct levels (LPL I through LPL IV). These levels dictate the geometric parameters used during the design phase: Lightning Protection Level (LPL) Rolling Sphere Radius Max. Current intercepted (Highest Protection) 5 x 5 meters LPL II 10 x 10 meters LPL III 15 x 15 meters LPL IV 20 x 20 meters
An external LPS alone cannot prevent internal damage. High currents create massive potential differences that can cause dangerous sparking between the external LPS and internal metallic components. Lightning Equipotential Bonding (EB)
To remain compliant, systems must undergo regular inspection and testing as outlined in the standard. iec 62305-3 pdf
Visual inspection every 6 months; full testing every year. Conclusion and Summary
, which recently replaced the 2010 version with updated methods and component requirements. IEC Webstore Core Components of IEC 62305-3 High currents create massive potential differences that can
Are you dealing with any inside the building?
If bonding cannot be achieved, a calculated separation distance ( Conclusion and Summary , which recently replaced the
The external LPS acts as the shield for the building. According to IEC 62305-3, a complete external system must feature three seamlessly integrated components: 1. Air-Termination Systems
The latest update (September 2024) introduced several critical technical revisions: Insulated LPS
Unlike Part 2, which focuses on Risk Management (calculating whether you need protection), Part 3 assumes you need it and tells you how to do it. It provides the design principles for:
Visual inspection every two years; full testing every four years.