rolling-sphere radius by Lightning Protection Level (LPL I=20 m to LPL IV=60 m)
20-60 mobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| As of | 2024 |
| Source | IEC 62305-3; IEC 62305-2:2024 risk method · IEC 62305-3:2024, Table 2; full table is paywalled and specifies 20, 30, 45 and 60 m for LPS Classes I–IV |
| Review | checking…review by 2026-09-14 · standard cadence |
| Recorded changes | last 2026-06-29 |
| Claim id | rolling-sphere-radius-by-lightning-protection |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.