EN IEC 62305-3:2024
(Main)Protection against lightning - Part 3: Physical damage to structures and life hazard
Protection against lightning - Part 3: Physical damage to structures and life hazard
IEC 62305-3:2024 provides the requirements for protection of a structure against physical damage by means of a lightning protection system (LPS), and for protection against injury to human beings due to touch and step voltages in the vicinity of an LPS (see IEC 62305-1). This document is applicable to the: a) design, installation, inspection and maintenance of an LPS for structures without limitation of their height, b) establishment of measures for protection against injury to human beings primarily due to touch and step voltages. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Minimum thicknesses of metal sheets or metal pipes are given in Table 4 for air-termination systems where it is necessary to prevent hot-spot problems. Maximum temperature rises ΔT (K) and time duration t50 (s) for different thicknesses and long strokes are also given. b) Cross-reference to the IEC 62561 series is made for the use of reliable, stable, safe and appropriate LPS components. c) The application of two methods – general and simplified – for separation distance calculation is clarified. d) Some changes to the requirements for continuity of steel reinforcement are made. e) Annex C is revised to address comments from IEC subcommittee 31J. f) Revision of positioning of air-termination conductors are modified according to the three accepted methods. A more precise description of the methods for positioning of the air-termination systems are made according to the complexity of structures to be protected. The main text has been simplified, Annex A has been deleted and all detailed information has been moved to Annex D. g) Information on the protection of green roofs is introduced in Annex D. h) Information on the protection of protruding parts on facades of tall buildings is introduced in Annex D. i) a new definition of “electrically insulated LPS” has been introduced to distinguish it from an LPS both electrically and physically isolated from the structure, with a slight modification of the other LPS definitions.
Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen
Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques humains
L'IEC 62305-3:2024 spécifie les exigences pour la protection d'une structure contre les dommages physiques par un système de protection contre la foudre (SPF) et pour la protection contre les blessures d'êtres humains dues aux tensions de contact et de pas à proximité d'un SPF (voir l'IEC 62305-1). Le présent document s'applique: a) à la conception, l'installation, l'inspection et la maintenance d'un SPF pour des structures, sans limitation de leur hauteur; b) à la mise en œuvre de mesures pour la protection contre les blessures d'êtres humains essentiellement dues aux tensions de contact et de pas. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) les épaisseurs minimales des tôles ou canalisations métalliques sont indiquées dans le Tableau 4 pour les dispositifs de capture à utiliser si des mesures de prévention contre les problèmes de points chauds se révèlent nécessaires. Les échauffements maximaux ΔT (K) et la durée t50 (s) pour différentes épaisseurs et pour des coups de longue durée sont également donnés; b) un renvoi à la série IEC 62561 est établi en ce qui concerne l'utilisation de composants appropriés fiables, stables et sûrs du système de protection contre la foudre (SPF); c) l'application de deux méthodes (générale et simplifiée) de calcul de la distance de séparation est clarifiée; d) certaines exigences relatives à la continuité des armatures en acier ont été modifiées; e) l'Annexe C est révisée pour tenir compte des remarques formulées par le sous-comité 31J de l'IEC; f) Le positionnement des conducteurs de capture a été révisé en fonction des trois méthodes admises. Les méthodes de positionnement des dispositifs de capture sont décrites avec davantage de précision compte tenu de la complexité des structures à protéger. Le texte principal a été simplifié, l'Annexe A a été supprimée et toutes les informations supplémentaires ont été déplacées à l'Annexe D; g) des informations relatives à la protection de toitures végétalisées ont été ajoutées à l'Annexe D; h) des informations relatives à la protection des parties saillantes sur les façades de bâtiments hauts ont été ajoutées à l'Annexe D; i) une nouvelle définition de la “SPF isolée électriquement” a été introduite pour la distinguer de la SPF isolée électriquement et physiquement de la structure, avec une légère modification des autres définitions de la SPF.
Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska ogroženost
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN 62305-3:2011
Zaščita pred delovanjem strele - 3. del: Fizična škoda na zgradbah in življenjska
ogroženost
Protection against lightning - Part 3: Physical damage to structures and life hazard
Blitzschutz - Teil 3: Schutz von baulichen Anlagen und Personen
Protection contre la foudre - Partie 3: Dommages physiques sur les structures et risques
humains
Ta slovenski standard je istoveten z: EN IEC 62305-3:2024
ICS:
91.120.40 Zaščita pred strelo Lightning protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62305-3
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2024
ICS 29.020; 91.120.40 Supersedes EN 62305-3:2011
English Version
Protection against lightning - Part 3: Physical damage to
structures and life hazard
(IEC 62305-3:2024)
Protection contre la foudre - Partie 3: Dommages physiques Blitzschutz - Teil 3: Schutz von baulichen Anlagen und
sur les structures et risques humains Personen
(IEC 62305-3:2024) (IEC 62305-3:2024)
This European Standard was approved by CENELEC on 2024-10-17. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62305-3:2024 E
European foreword
The text of document 81/764/FDIS, future edition 3 of IEC 62305-3, prepared by TC 81 "Lightning
protection" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-10-31
document have to be withdrawn
This document supersedes EN 62305-3:2011 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62305-3:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61400-24 NOTE Approved as EN IEC 61400-24
ISO 1182 NOTE Approved as EN ISO 1182
ISO 11925-2 NOTE Approved as EN ISO 11925-2
IEC 60071-2 NOTE Approved as EN IEC 60071-2
IEC 60079-17 NOTE Approved as EN IEC 60079-17
IEC 62858 NOTE Approved as EN IEC 62858
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60079-10-1 2020 Explosive atmospheres - Part 10-1: EN IEC 60079-10-1 2021
Classification of areas - Explosive gas
atmospheres
IEC 60079-10-2 2015 Explosive atmospheres - Part 10-2: EN 60079-10-2 2015
Classification of areas - Explosive dust
atmospheres
IEC 60079-14 - Explosive atmospheres - Part 14: Electrical EN IEC 60079-14 -
installation design, selection and
installation of equipment, including initial
inspection
IEC 60364-5-53 - Low-voltage electrical installations -- Part - -
5-53: Selection and erection of electrical
equipment - Protection, isolation,
switching, control and monitoring
IEC 61643-11 - Low-voltage surge protective devices - Part EN 61643-11 -
11: Surge protective devices connected to
low-voltage power systems - Requirements
and test methods
IEC 61643-21 - Low voltage surge protective devices - Part EN 61643-21 -
21: Surge protective devices connected to
telecommunications and signalling
networks - Performance requirements and
testing methods
IEC 62305-1 2024 Protection against lightning - Part 1: EN IEC 62305-1 2024
General principles
IEC 62305-2 2024 Protection against lightning - Part 2: Risk EN IEC 62305-2 2024
management
IEC 62305-4 2024 Protection against lightning - Part 4: EN IEC 62305-4 2024
Electrical and electronic systems within
structures
IEC 62561 series Lightning protection system components EN IEC 62561 series
(LPSC) - Part 1: Requirements for
connection components
Publication Year Title EN/HD Year
IEC 62561-1 2017 Lightning protection system components EN 62561-1 2017
(LPSC)
IEC/TS 62561-8 2018 Lightning protection system components - -
(LPSC) - Part 8: Requirements for
components for isolated LPS
ISO 3864-1 - Graphical symbols - Safety colours and - -
safety signs - Part 1: Design principles for
safety signs and safety markings
IEC 62305-3 ®
Edition 3.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Protection against lightning –
Part 3: Physical damage to structures and life hazard
Protection contre la foudre –
Partie 3: Dommages physiques sur les structures et risques humains
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020, 91.120.40 ISBN 978-2-8322-9059-0
– 2 – IEC 62305-3:2024 © IEC 2024
CONTENTS
FOREWORD . 7
INTRODUCTION . 10
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 13
4 Lightning protection system (LPS) . 18
4.1 Class of LPS . 18
4.2 Design of the LPS . 19
5 External lightning protection system . 19
5.1 General . 19
5.1.1 Application of an external LPS . 19
5.1.2 Application of an isolated LPS or an electrically insulated LPS . 19
5.1.3 Use of natural components . 20
5.2 Air-termination systems . 20
5.2.1 General . 20
5.2.2 Positioning . 20
5.2.3 Air terminations against flashes to the side of tall structures . 25
5.2.4 Construction . 26
5.2.5 Natural components . 26
5.3 Down-conductor systems . 29
5.3.1 General . 29
5.3.2 Positioning of an isolated LPS . 29
5.3.3 Positioning of an attached LPS . 29
5.3.4 Construction . 30
5.3.5 Natural components . 32
5.3.6 Test joints and test points . 33
5.4 Earth-termination system . 33
5.4.1 General . 33
5.4.2 Earthing arrangement in general conditions . 33
5.4.3 Installation of earth electrodes . 35
5.4.4 Natural earth electrodes . 36
5.5 Components . 36
5.5.1 General . 36
5.5.2 Fixing . 37
5.5.3 Connections . 38
5.5.4 Components of an electrically insulated LPS . 38
5.6 Materials and dimensions . 38
5.6.1 Materials . 38
5.6.2 Dimensions . 38
6 Internal lightning protection system . 41
6.1 General . 41
6.2 Lightning equipotential bonding . 41
6.2.1 General . 41
6.2.2 Lightning equipotential bonding for metal installations . 42
6.2.3 Lightning equipotential bonding for external conductive parts . 43
6.2.4 Lightning equipotential bonding for internal systems . 43
IEC 62305-3:2024 © IEC 2024 – 3 –
6.2.5 Lightning equipotential bonding for lines connected to the structure to
be protected . 44
6.3 Separation distance . 45
6.3.1 General approach . 45
6.3.2 Simplified approach . 46
7 Maintenance and inspection of an LPS . 47
7.1 General . 47
7.2 Maintenance . 47
7.3 Objective of inspections .
...
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