Lightning Protection Level I–IV per IEC 62305-2 risk assessment.

What mesh for a house?

LPL III — 15×15 m; LPL IV — 20×20 m.

IEC 62305 Lightning protection (parts 1–4) — translation

IEC 62305: LPL I–IV, rolling sphere radii, meshes, down conductors, SPDs, LPZ zones.

🇷🇺 PUE — Rules for Electrical Installations (7th ed.)🕰️ PUE-6 — Rules for Electrical Installations (6th ed., 1985)🇺🇸 NEC — National Electrical Code (NFPA 70)🇪🇺 IEC 60364 / HD 60364 (EU national codes)🌎 NOM-001-SEDE, NBR 5410, AEA 90364, RETIE, NCh 4, CNE 🇨🇳 GB 50054, GB 50303, JGJ 16, GB/T 16895 (IEC 60364)🇮🇳 IS 732

Document

Document	IEC 62305 Lightning protection (parts 1–4)
Edition	2010 (части 1–4)
Status	Current (IEC 62305-1…4)
Issued by	IEC
Applies to	Lightning protection: LPL I–IV, risk assessment, LPS, SPDs

Document structure

№	Chapter / section
Часть 1	General principles, LPL
Часть 2	Risk management
Часть 3	Physical damage: LPS, meshes, down conductors
Часть 4	Electronic systems: SPDs, LPZ

IEC 60364-4-41 Protection against electric shock IEC 60364-5-52 Wiring systems IEC 60364-5-53 Switchgear and surge protection IEC 60364-7-701 Rooms with baths and showers IEC 60364-4-43 Overcurrent protection IEC 60364-6 Verification of installations IEC 62305 Lightning protection (parts 1–4)IEC 60364-7-710 Medical locations IEC 60364-5-54 Earthing and protective conductors IEC 60364-7-702 Pools and fountains BS 7671 UK Wiring Regulations AS/NZS 3000 Wiring Rules (Australia/NZ)

LPL (Part 1)

Four levels: LPL I (99% interception) to LPL IV (91%), chosen by risk assessment.

Risk (Part 2)

Quantitative risk components vs tolerable values (10⁻⁵/year for life).

LPS (Part 3)

Rolling sphere: 20/30/45/60 m; meshes: 5×5/10×10/15×15/20×20 m; down conductors: 10/15/20/25 m for classes I–IV; roof metal ≥ 0.5 mm as natural terminal.

SPDs (Part 4)

LPZ 0A/0B/1/2 zones; type 1 (10/350 µs) at the boundary, type 2 (8/20 µs) in main panels, type 3 near equipment.

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Data is for reference. Final design decisions must follow current regulations and a qualified engineer.
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