IEC 62305-2-2024 cor1-2024 PDF

Full title and description

IEC 62305-2:2024/COR1:2024 — Corrigendum 1 to "Protection against lightning — Part 2: Risk management". This corrigendum publishes corrections and clarifications to the 3rd edition (2024) of IEC 62305-2 and its risk‑management provisions; the corrigendum text has been incorporated into the consolidated IEC 62305-2:2024 copy.

Abstract

This Corrigendum 1 issues editorial and technical corrections to IEC 62305-2:2024 (Part 2 — Risk management). It is a short, bilingual corrective notice (English/French) that clarifies wording, fixes errors and ensures the risk‑assessment procedures and related definitions in the 3rd edition are consistent; the corrigendum content is included in the published consolidated edition of IEC 62305-2:2024.

General information

• Status: Published — Corrigendum to IEC 62305-2:2024 (ed. 3.0).
• Publication date: 17 October 2024 (Corrigendum 1 — IEC 62305-2:2024/COR1:2024).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 29.020 (Electrical engineering in general); 91.120.40 (Lightning protection).
• Edition / version: Edition 3.0 (corrigendum to IEC 62305-2:2024).
• Number of pages: 2 (corrigendum document).

Scope

IEC 62305-2:2024/COR1:2024 provides corrections to the risk‑management procedures in IEC 62305-2:2024, which is applicable to evaluation of risk to structures from lightning flashes to earth and to selection of appropriate protection measures. The main (3rd) edition updates concepts used in risk calculations (including the NSG strike‑point density, a single combined risk concept, availability‑related frequency of damage and use of thunderstorm warning systems) and the corrigendum refines/clarifies text within that framework.

Key topics and requirements

• Publication of corrective text to resolve editorial/technical issues in IEC 62305-2:2024 and to align the standard's formulas, definitions and tables with the intended risk‑assessment method.
• Risk management procedure for structures exposed to lightning flashes to earth (evaluation steps, tolerable risk selection, selection of protection measures).
• Clarifications relating to new/updated concepts introduced in the 3rd edition: single combined risk (life + fire), frequency of availability‑impairing damage, and the lightning ground strike‑point density NSG (replacing NG) used in expected annual dangerous‑event calculations.
• Notes on preventive temporary measures using thunderstorm warning systems (TWS) and references to IEC 62793 where relevant.

Typical use and users

Engineers and designers of lightning protection systems, risk assessors, safety and asset‑management professionals, inspection and certification bodies, standards committees and national standards adopters consult this corrigendum when applying IEC 62305-2:2024 to ensure they use the corrected text and calculations in risk assessments and in specifying protective measures.

Related standards

IEC 62305 is a multi‑part series on lightning protection (Part 1 — General principles; Part 2 — Risk management; Part 3 — Physical damage to structures and life hazard; Part 4 — Electrical and electronic systems within structures). IEC 62305-2 cross‑references IEC 62793 for thunderstorm warning systems (TWS). National/adopted versions and consolidated copies (with corrigenda) are available through national standards bodies.

Keywords

lightning protection, risk management, IEC 62305, corrigendum, NSG, lightning strike‑point density, thunderstorm warning system (TWS), risk assessment, edition 3.0.

FAQ

Q: What is this standard?

A: IEC 62305-2:2024/COR1:2024 is Corrigendum 1 to IEC 62305-2:2024 — a short corrective document that amends and clarifies the 3rd edition (2024) of Part 2 (Risk management) of the IEC 62305 lightning‑protection series.

Q: What does it cover?

A: The corrigendum provides editorial and technical corrections to the risk‑assessment procedures, definitions and related text in IEC 62305-2:2024. The base standard itself establishes procedures to evaluate lightning risk to structures and to select measures to reduce that risk.

Q: Who typically uses it?

A: Lightning‑protection engineers, risk assessors, safety managers, certification/inspection bodies, standards committees and anyone applying IEC 62305-2 for design, evaluation or regulatory alignment use the corrigendum to ensure they apply the corrected provisions.

Q: Is it current or superseded?

A: The corrigendum was published on 17 October 2024 and is a current published correction to IEC 62305-2:2024 (ed. 3.0); corrigendum content has been included in the consolidated IEC 62305-2:2024 copy. Users should apply the consolidated 2024 edition with Corrigendum 1 incorporated.

Q: Is it part of a series?

A: Yes — IEC 62305 is a four‑part series on protection against lightning (Parts 1–4). IEC 62305-2 is Part 2 (Risk management); the corrigendum applies specifically to that part.

Q: What are the key keywords?

A: Lightning protection, risk management, NSG (strike‑point density), thunderstorm warning system (TWS), corrigendum, IEC 62305.