Issuing body
IEC
Latest edition
Parts 1–4, 2010–2013
Region
Global
Equipment items
1
Scope
Lightning protection system design — risk assessment, air termination, down conductors, earth termination, internal LPS.
Key requirements (7)
- Lightning protection: Parts 1 (general), 2 (risk), 3 (physical), 4 (electrical/electronic).
- Lightning protection level (LPL): I (highest, 99% capture), II (97%), III (91%), IV (84%).
- Air termination: rolling sphere method (radius 20/30/45/60 m for LPL I/II/III/IV).
- Mesh method: 5/10/15/20 m mesh size for LPL I/II/III/IV.
- Down conductors: spacing ≤ 10/10/15/20 m around perimeter.
- Earth termination: type A (radial / vertical) or type B (ring) — < 10 Ω target typical.
- Surge protection: SPD coordination (Type 1 / 2 / 3) at incomer, sub-distribution, equipment.
Related standards (2)
Applied to 1 equipment item
Electrical Systems