SIST HD 60364-5-52:2011/A1:2025
(Amendment)Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)
Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)
Errichten von Niederspannungsanlagen - Teil 5-52: Auswahl und Errichtung elektrischer Betriebsmittel - Kabel- und Leitungsanlagen (IEC 60364-5-52:2009/AMD1:2024)
Installations électriques à basse-tension - Partie 5-52: Choix et mise en oeuvre des matériels électriques - Canalisations (IEC 60364-5-52:2009/AMD1:2024)
Nizkonapetostne električne inštalacije - 5-52. del: Izbira in namestitev električne opreme - Inštalacijski sistemi - Dopolnilo A1 (IEC 60364-5-52:2009/AMD1:2024)
General Information
Relations
Overview
The SIST SIST HD 60364-5-52:2011/A1:2025 standard is a key European harmonization document that amends the low-voltage electrical installations requirements for the selection and erection of electrical equipment, specifically focusing on wiring systems. This amendment aligns with the IEC 60364-5-52:2009/AMD1:2024 edition and has been approved by CENELEC for implementation across member countries by January 31, 2026.
The standard provides updated technical guidance on the choice and installation methodologies of wiring systems in low-voltage electrical installations, introducing important considerations such as the cross-sectional areas of conductors, with special attention to neutral conductor sizing and the effects of harmonic currents in three-phase systems. It supports the objective of ensuring electrical safety, reliability, and conformity with modern electrical demands.
Key Topics
- Conductor Cross-Section Selection
- Minimum neutral conductor size must be at least equal to the line conductors in single-phase circuits or certain polyphase circuits.
- In larger cross-sections, neutral conductors can be reduced to at least 50% of the line conductor size but not less than 16 mm² copper or 25 mm² aluminium.
- Harmonic Currents and Their Impact
- Addresses the influence of triplen harmonics (third harmonic multiples) on neutral conductors in balanced three-phase systems.
- Explains that harmonic currents in the neutral can exceed line current magnitudes, influencing the current-carrying capacity and thermal performance of wiring systems.
- Introduces Annex E, which provides calculation methods and reduction factors to accommodate harmonic effects in conductor sizing.
- Reduction Factors for Harmonic Currents
- Provides tables and formulas to adjust cable current-carrying capacities when triplen harmonic currents exist.
- Offers guidance for scenarios where the neutral conductor is either equal to or half the size of the line conductors.
- Harmonization and Compliance
- Reinforces compliance with CENELEC regulations across European nations.
- Integration with related standards, such as IEC 60364-4-43:2023, to coordinate protection against overcurrent in low-voltage installations.
Applications
This updated standard is essential for electrical engineers, designers, contractors, and safety inspectors involved in the planning, design, and installation of low-voltage electrical wiring systems in residential, commercial, and industrial buildings. Practical applications include:
- Designing Wiring Systems: Proper selection of conductor sizes, particularly neutral conductors, to comply with modern electrical loads and harmonic distortions.
- Electrical Safety Assessments: Ensuring wiring systems manage harmonic currents effectively to prevent overheating and potential faults.
- Installation Practices: Enforcing uniform installation criteria across European markets for wiring systems, assuring compatibility and operational safety.
- Harmonics Management: Incorporating the latest calculations for neutral current effects, particularly in circuits supplying power electronics, LED lighting installations, and computer power supplies that generate harmonics.
- Regulatory Compliance: Meeting legal requirements for national adoption of European harmonized standards, facilitating international trade and construction conformity.
Related Standards
To ensure comprehensive adherence to electrical installation safety and performance, SIST HD 60364-5-52:2011/A1:2025 should be used alongside related standards, including:
- IEC 60364-4-43:2023 – Low-voltage electrical installations – Protection for safety – Protection against overcurrent, providing complementary protection measures.
- ISO/IEC Directives – Governing publication and standardization protocols for electrical and electronic standards.
- IEC 61000 Series – Applicable for understanding and mitigating electromagnetic disturbances and harmonic pollution.
- Other parts of the IEC 60364 series – Covering general electrical installation requirements and additional equipment selection rules.
Keywords: low-voltage electrical installations, wiring systems, conductor cross-section, neutral conductor sizing, harmonic currents, triplen harmonics, IEC 60364-5-52 amendment, electrical safety, CENELEC harmonization, overcurrent protection, electrical equipment installation, European electrotechnical standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2025
Nizkonapetostne električne inštalacije - 5-52. del: Izbira in namestitev električne
opreme - Inštalacijski sistemi - Dopolnilo A1 (IEC 60364-5-52:2009/AMD1:2024)
Low-voltage electrical installations - Part 5-52: Selection and erection of electrical
equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)
Errichten von Niederspannungsanlagen - Teil 5-52: Auswahl und Errichtung elektrischer
Betriebsmittel - Kabel- und Leitungsanlagen (IEC 60364-5-52:2009/AMD1:2024)
Installations électriques à basse-tension - Partie 5-52: Choix et mise en oeuvre des
matériels électriques - Canalisations (IEC 60364-5-52:2009/AMD1:2024)
Ta slovenski standard je istoveten z: HD 60364-5-52:2011/A1:2025
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
HARMONIZATION DOCUMENT HD 60364-5-52:2011/A1
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT January 2025
ICS 13.260; 91.140.50
English Version
Low-voltage electrical installations - Part 5-52: Selection and
erection of electrical equipment - Wiring systems
(IEC 60364-5-52:2009/AMD1:2024)
Installations électriques à basse-tension - Partie 5-52: Errichten von Niederspannungsanlagen - Teil 5-52:
Choix et mise en oeuvre des matériels électriques - Auswahl und Errichtung elektrischer Betriebsmittel - Kabel-
Canalisations und Leitungsanlagen
(IEC 60364-5-52:2009/AMD1:2024) (IEC 60364-5-52:2009/AMD1:2024)
This amendment A1 modifies the Harmonization Document HD 60364-5-52:2011; it was approved by CENELEC on 2024-12-27. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this
amendment at national level.
Up-to-date lists and bibliographical references concerning such national implementations may be obtained on application to the CEN-
CENELEC Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German).
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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. HD 60364-5-52:2011/A1:2025 E
European foreword
The text of document 64/2675/FDIS, future edition 3 of IEC 60364-5-52/AMD1, prepared by TC 64
"Electrical installations and protection against electric shock" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as HD 60364-5-52:2011/A1:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-01-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-01-31
document have to be withdrawn
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 60364-5-52:2009/AMD1:2024 was approved by CENELEC
as a European Standard without any modification.
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.
Add the following reference:
Publication Year Title EN/HD Year
IEC 60364-4-43 2023 Low-voltage electrical installations - Part 4- HD 60364-4-43 2023
43: Protection for safety - Protection
against overcurrent
IEC 60364-5-52 ®
Edition 3.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage electrical installations –
Part 5-52: Selection and erection of electrical equipment – Wiring systems
Installations électriques à basse-tension –
Partie 5-52: Choix et mise en oeuvre des matériels électriques – Canalisations
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.260, 91.140.50 ISBN 978-2-8322-9969-2
– 2 – IEC 60364-5-52:2009/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE ELECTRICAL INSTALLATIONS –
Part 5-52: Selection and erection of electrical equipment –
Wiring systems
AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60364-5-52:2009 has been prepared by IEC technical committee 64:
Electrical installations and protection against electrical shock.
The text of this Amendment is based on the following documents:
Draft Report on voting
64/2675/FDIS 64/2703/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
IEC 60364-5-52:2009/AMD1:2024 – 3 –
© IEC 2024
The language used for the development of this Amendment is English.
This document was drafted in accordan
...
Frequently Asked Questions
SIST HD 60364-5-52:2011/A1:2025 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)". This standard covers: Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)
Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009/AMD1:2024)
SIST HD 60364-5-52:2011/A1:2025 is classified under the following ICS (International Classification for Standards) categories: 13.260 - Protection against electric shock. Live working; 91.140.50 - Electricity supply systems. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST HD 60364-5-52:2011/A1:2025 has the following relationships with other standards: It is inter standard links to SIST HD 60364-5-52:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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