SIST EN IEC 62305-4:2024

SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN 62305-4:2011
SIST EN 62305-4:2011/AC:2016
Zaščita pred delovanjem strele - 4. del: Električni in elektronski sistemi v zgradbah
Protection against lightning - Part 4: Electrical and electronic systems within structures
Blitzschutz --Teil 4: Elektrische und elektronische Systeme in baulichen Anlagen
Protection contre la foudre - Partie 4: Réseaux de puissance et de communication dans
les structures
Ta slovenski standard je istoveten z: EN IEC 62305-4:2024
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 62305-4

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2024
ICS 29.020; 91.120.40 Supersedes EN 62305-4:2011; EN 62305-
4:2011/AC:2016-11
English Version
Protection against lightning - Part 4: Electrical and electronic
systems within structures
(IEC 62305-4:2024)
Protection contre la foudre - Partie 4: Réseaux de Blitzschutz - Teil 4: Elektrische und elektronische Systeme
puissance et de communication dans les structures in baulichen Anlagen
(IEC 62305-4:2024) (IEC 62305-4:2024)
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 62305-4:2024 E

European foreword
The text of document 81/733/FDIS, future edition 3 of IEC 62305-4, 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 62305-4:2011 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 62305-4:2024 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 60364-4-43 NOTE Approved as HD 60364-4-43
IEC 60364-4-44:2007 NOTE Approved as HD 60364-4-444:2010
IEC 60364-4-44:2007/A1:2015 NOTE Approved as HD 60364-4-443:2016
IEC 61000 series NOTE Approved as EN IEC 61000 series
IEC 62475 NOTE Approved as EN 62475
IEC 60060 series NOTE Approved as EN 60060 series
IEC 62793 NOTE Approved as EN IEC 62793
IEC 60038 NOTE Approved as EN 60038
IEC 61643-351 NOTE Approved as EN 61643-351
IEC 61643-352 NOTE Approved as EN IEC 61643-352
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 60364-5-53 2019 Low-voltage electrical installations -- Part - -
5-53: Selection and erection of electrical
equipment - Protection, isolation,
switching, control and monitoring
IEC 60664-1 - Insulation coordination for equipment EN IEC 60664-1 -
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 61000-4-5 - Electromagnetic compatibility (EMC) - Part EN 61000-4-5 -
4-5: Testing and measurement techniques
- Surge immunity test
IEC 61000-4-9 - Electromagnetic compatibility (EMC) – Part EN 61000-4-9 -
4-9: Testing and measurement techniques
– Impulse magnetic field immunity test
IEC 61000-4-10 - Electromagnetic compatibility (EMC) – Part EN 61000-4-10 -
4-10: Testing and measurement
techniques – Damped oscillatory magnetic
field immunity test
IEC 61643-11 (mod) 2011 Low-voltage surge protective devices - Part EN 61643-11 2012
11: Surge protective devices connected to
low-voltage power systems - Requirements
and test methods
- - + A11 2018
IEC 61643-12 2020 Low-voltage surge protective devices - Part - -
12: Surge protective devices connected to
low-voltage power systems - Selection and
application principles
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
Publication Year Title EN/HD Year
IEC 61643-22 - Low-voltage surge protective devices - Part CLC/TS 61643-22 -
22: Surge protective devices connected to
telecommunications and signalling
networks - Selection and application
principles
IEC 61643-31 - Low-voltage surge protective devices – EN 61643-31 -
Part 31: Requirements and test methods
for SPDs for photovoltaic installations
IEC 61643-32 2017 Low-voltage surge protective devices – - -
Part 32: Surge protective devices
connected to the d.c. side of photovoltaic
installations – Selection and application
principles
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 62305-3 2024 Protection against lightning - Part 3: EN IEC 62305-3 2024
Physical damage to structures and life
hazard
IEC 62561 series Lightning protection system components EN IEC 62561 series
(LPSC) - Part 1: Requirements for
connection components
IEC 62305-4 ®
Edition 3.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Protection against lightning –

Part 4: Electrical and electronic systems within structures

Protection contre la foudre –
Partie 4: Réseaux de puissance et de communication dans les structures

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020, 91.120.40 ISBN 978-2-8322-7933-5

– 2 – IEC 62305-4:2024 © IEC 2024
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 12
4 Design and installation of SPM . 16
4.1 General . 16
4.2 Design of SPM . 20
4.3 Lightning protection zones (LPZs) . 20
4.3.1 General . 20
4.3.2 Outer zones . 20
4.3.3 Inner zones . 21
4.4 Basic SPM . 23
5 Earthing and bonding networks . 24
5.1 General . 24
5.2 Earth-termination system . 25
5.3 Bonding network . 26
5.4 Bonding bars . 31
5.5 Bonding at the boundary of an LPZ . 32
5.6 Material and dimensions of bonding components . 32
6 Magnetic shielding and line routing . 33
6.1 General . 33
6.2 Spatial shielding . 33
6.3 Shielding of internal lines . 33
6.4 Routing of internal lines . 34
6.5 Shielding of external lines . 34
6.6 Material and dimensions of magnetic shields . 34
7 Coordinated SPD system . 34
8 Isolating interfaces . 35
9 SPM management . 35
9.1 General . 35
9.2 SPM management plan . 36
9.3 Inspection of SPM . 38
9.3.1 General . 38
9.3.2 Inspection procedure . 38
9.3.3 Inspection documentation . 39
9.4 Maintenance . 39
Annex A (informative) Basis of electromagnetic environment evaluation in an LPZ . 40
A.1 General . 40
A.2 Damaging effects on electrical and electronic systems due to lightning . 40
A.2.1 Sources of damage . 40
A.2.2 Object of damage . 40
A.2.3 Withstand of equipment signal ports . 40
A.2.4 Withstand of equipment power ports . 41
A.2.5 Relationship between the object of damage and the source of damage . 42
A.3 Spatial shielding, line routing and line shielding . 42

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