Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U) - Part 1: General requirements

This European Standard gives the general requirements for rigid and flexible energy cables of rated voltages U0/U up to and including 450/750 V AC, used in power installations and with domestic and industrial appliances and equipment.
NOTE 1   For some types of flexible cables, the term "cord" is used.
NOTE 2   Rated voltages are given by reference to alternating current systems. Use of the cables in direct current systems is permitted.
NOTE 3   National regulations may prescribe additional performance requirements for cables that are not given in the particular requirements. For example for buildings with high levels of public access, additional fire performance requirements may be applicable, The test methods for checking conformity with the requirements are given in other standards (see Introduction). The particular types of cables are specified in EN 50525-2 (series) and EN 50525-3 (series). The individual parts within those two series are collectively referred to hereafter as "the particular specifications". Only the sizes (conductor class, cross-sectional area), number of cores, other constructional features and rated voltages given in the particular specification apply to the individual cable type. The code designations of these types of cables are in accordance with HD 361.

Kabel und Leitungen - Starkstromleitungen mit Nennspannungen bis 450/750 V (U0/U) - Teil 1: Allgemeine Anforderungen

Câbles électriques - Câbles d’énergie basse tension de tension assignée au plus égale à 450/750 V (U0/U) - Partie 1: Exigences générales

Električni kabli - Nizkonapetostni energetski kabli z naznačeno napetostjo do vključno 450/750 V (U0/U) - 1. del: Splošne zahteve - Dopolnilo A1

General Information

Status
Published
Public Enquiry End Date
22-Jul-2021
Publication Date
14-Nov-2022
Technical Committee
IEKA - Electric cables
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
10-Nov-2022
Due Date
15-Jan-2023
Completion Date
15-Nov-2022

Relations

Effective Date
01-Jan-2023

Overview

SIST EN 50525-1:2011/A1:2023 is a European Standard developed by the CLC (European Committee for Electrotechnical Standardization) that specifies general requirements for low voltage energy cables with rated voltages up to and including 450/750 V (U0/U). This standard covers both rigid and flexible cables used in power installations and with domestic and industrial appliances and equipment. It is part of the EN 50525 series, which defines specific requirements for particular cable types under EN 50525-2 and EN 50525-3.

The 2022 amendment (A1) updates and clarifies various requirements, introduces new fire reaction classifications, and aligns the document with related European regulations and harmonized standards. It also incorporates guidance on cable construction, electrical characteristics, and national conditions affecting cable design and use.

Key Topics

  • Scope and Application:
    The standard applies to low voltage cables designed for AC systems up to 450/750 V rating; usage in DC systems is permitted. It addresses both rigid and flexible cables, commonly referred to as cords in certain flexible types.

  • General Requirements:
    Specifies constructional requirements-including conductor size and class, insulation, sheath, and marking rules-all tailored to ensure reliable performance in electrical installations.

  • Rated Voltage:
    Defines voltage ratings consistent with AC systems and modern terminology (AC and DC), ensuring harmonized testing and classification methods.

  • Reaction to Fire:
    Introduces clause 7.6 detailing fire performance requirements aligned with the Construction Products Regulation (CPR, EU 305/2011) and test standards EN 50575 and EN 13501-6. Fire performance classifications may vary based on national regulations, critical for fixed/permanent installations.

  • Electrical and Mechanical Tests:
    Describes the test methods and performance criteria necessary for assessing cables, including electric properties, mechanical strength, and resistance to environmental factors.

  • Guide to Usage:
    Refers users to EN 50565-1 and EN 50565-2 for detailed installation guidance, current ratings, and application recommendations. The guide enhances proper cable selection and deployment for safety and longevity.

  • Special National Conditions:
    Includes Annex ZB, which addresses country-specific regulations or practices, such as in Italy and Spain, ensuring compliance with local fire behavior and installation requirements while maintaining harmonization.

Applications

SIST EN 50525-1:2011/A1:2023 is essential for:

  • Electrical Installers and Contractors:
    Ensuring the selection and installation of low voltage cables meet European safety and quality requirements for residential, commercial, and industrial setups.

  • Cable Manufacturers:
    Designing and producing energy cables that meet harmonized standards, enabling market acceptance across European countries with consistent performance criteria.

  • Regulatory Authorities:
    Using it as a reference for enforcing safety regulations relating to electrical cables used in building wiring and power distribution.

  • Design Engineers:
    Specifying cable types and characteristics compliant with general and specific requirements for low voltage energy distribution systems.

The standard supports compliance with EU directives and building codes, enhancing safety, reliability, and interoperability of electrical power installations.

Related Standards

  • EN 50525-2 and EN 50525-3 Series:
    Provide specifications for particular cable types (e.g., flexible cords, installation cables) complementing the general requirements of EN 50525-1.

  • EN 50565-1 and EN 50565-2:
    Offer detailed guidance on the use, rating, and installation of cables with rated voltages up to 450/750 V, including current ratings for flexible cables.

  • EN 50575:
    Addresses the reaction to fire performance of cables used in construction, mandating testing methods and classification under CPR.

  • EN 60754-1 and EN 60754-2:
    Cover tests on gases evolved during combustion of cable materials, measuring halogen acid gas content and acidity.

  • EN 13501-6:
    Defines fire classification for power, control, and communication cables based on reaction to fire tests.

  • National Standards (e.g., CEI UNEL 35016 in Italy, Royal Decree 842/2002 in Spain):
    Define additional fire and installation requirements specific to national contexts, ensuring compliance with local regulations alongside EN 50525.


Keywords: EN 50525-1, low voltage energy cables, 450/750 V cables, general cable requirements, low voltage cables standard, reaction to fire cables, cable construction, European cable standards, electrical installation cables, CLC cable standards, power cables Europe, CEI UNEL, cable testing methods

Amendment

SIST EN 50525-1:2011/A1:2023

English language
8 pages
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Frequently Asked Questions

SIST EN 50525-1:2011/A1:2023 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Electric cables - Low voltage energy cables of rated voltages up to and including 450/750 V (U0/U) - Part 1: General requirements". This standard covers: This European Standard gives the general requirements for rigid and flexible energy cables of rated voltages U0/U up to and including 450/750 V AC, used in power installations and with domestic and industrial appliances and equipment. NOTE 1 For some types of flexible cables, the term "cord" is used. NOTE 2 Rated voltages are given by reference to alternating current systems. Use of the cables in direct current systems is permitted. NOTE 3 National regulations may prescribe additional performance requirements for cables that are not given in the particular requirements. For example for buildings with high levels of public access, additional fire performance requirements may be applicable, The test methods for checking conformity with the requirements are given in other standards (see Introduction). The particular types of cables are specified in EN 50525-2 (series) and EN 50525-3 (series). The individual parts within those two series are collectively referred to hereafter as "the particular specifications". Only the sizes (conductor class, cross-sectional area), number of cores, other constructional features and rated voltages given in the particular specification apply to the individual cable type. The code designations of these types of cables are in accordance with HD 361.

This European Standard gives the general requirements for rigid and flexible energy cables of rated voltages U0/U up to and including 450/750 V AC, used in power installations and with domestic and industrial appliances and equipment. NOTE 1 For some types of flexible cables, the term "cord" is used. NOTE 2 Rated voltages are given by reference to alternating current systems. Use of the cables in direct current systems is permitted. NOTE 3 National regulations may prescribe additional performance requirements for cables that are not given in the particular requirements. For example for buildings with high levels of public access, additional fire performance requirements may be applicable, The test methods for checking conformity with the requirements are given in other standards (see Introduction). The particular types of cables are specified in EN 50525-2 (series) and EN 50525-3 (series). The individual parts within those two series are collectively referred to hereafter as "the particular specifications". Only the sizes (conductor class, cross-sectional area), number of cores, other constructional features and rated voltages given in the particular specification apply to the individual cable type. The code designations of these types of cables are in accordance with HD 361.

SIST EN 50525-1:2011/A1:2023 is classified under the following ICS (International Classification for Standards) categories: 29.060.20 - Cables. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 50525-1:2011/A1:2023 has the following relationships with other standards: It is inter standard links to SIST EN 50525-1:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 50525-1:2011/A1:2023 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2023
Električni kabli - Nizkonapetostni energetski kabli z naznačeno napetostjo do
vključno 450/750 V (U0/U) - 1. del: Splošne zahteve - Dopolnilo A1
Electric cables - Low voltage energy cables of rated voltages up to and including
450/750 V (U0/U) - Part 1: General requirements
Kabel und Leitungen - Starkstromleitungen mit Nennspannungen bis 450/750 V (U0/U) -
Teil 1: Allgemeine Anforderungen
Câbles électriques - Câbles d’énergie basse tension de tension assignée au plus égale à
450/750 V (U0/U) - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 50525-1:2011/A1:2022
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50525-1:2011/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2022
ICS 29.060.20
English Version
Electric cables - Low voltage energy cables of rated voltages up
to and including 450/750 V (U0/U) - Part 1: General
requirements
Câbles électriques - Câbles d'énergie basse tension de Kabel und Leitungen - Starkstromleitungen mit
tension assignée au plus égale à 450/750 V (U0/U) - Partie Nennspannungen bis 450/750 V (U0/U) - Teil 1: Allgemeine
1: Exigences générales Anforderungen
This amendment A1 modifies the European Standard EN 50525-1:2011; it was approved by CENELEC on 2022-10-10. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50525-1:2011/A1:2022 E

Contents
European foreword . 3
1 Modifications to the Contents . 4
2 Modifications to the Introduction . 4
3 Modifications to the Scope . 4
4 Modifications to Clause 2, “Normative references” . 4
5 Modifications to Clause 4, “Rated voltage” . 5
6 Modifications to Clause 5, “Requirements for the construction of cables” . 5
7 Modifications to subclause 7.2, “Electrical requirements” . 5
8 Addition of a new subclause 7.6, “Reaction to fire” . 6
9 Modifications to Clause 8, “Guide to use of the cables” . 6
10 Modifications to Annex B . 6
11 Modifications to Annex D . 6
12 Modifications to Annex E . 7
13 Addition of a new annex . 7
14 Modifications to the Bibliography . 8

European foreword
This document (EN 50525-1:2011/A1:2022) has been prepared by CLC/TC 20 “Electric cables”.
The following dates are fixed:
latest date by which this document has to be (dop) 2023-10-10

implemented at national level by publication of
an identical national standard or by
endorsement
latest date by which the national standards
• (dow) 2025-10-10
conflicting with this 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.
1 Modifications to the Contents
Under chapter 7, below Clause 7.5, Add the following new clause:
“7.6 Reaction to Fire”
In the entry for Annex E, delete “… and its derivation from HD 21 and HD 22”
Below Annex E, add the following new title:
“Annex ZB (normative) Special National Conditions”
In Tables, delete:
“Table E.2 – Specific structure of EN 50525 and its derivation from HD 21 and HD 22”
“Table E.3 – Location of each part of HD 21 and HD 22”
And replace with “Table E.2 – References to previous standards HD 21 and HD 22”
2 Modifications to the Introduction
Delete the text and replace with:
“This document provides the general part of series EN 50525. The individual product standard parts in
Annex-E are for equipment manufacturers, installers and end-users.
The use of these cable standards in a different way than that recommended by EN 50565-1 and
EN 50565-2 could result in a lowering of safety and/or in a reduction of the expected life of the cable.
For the relationship with EU Directive (2014/35/EU) see informative Annex ZZ of the individual parts.
This part contains only the general requirements. Each separate product standard part refers to this
part.
In some countries local regulation(s) may define reaction of fire performances if the product is for
permanent installation in works. Performance requirements are those given in EN 50575 for relevant
properties.”
3 Modifications to the Scope
In the second line, delete “a.c.” and replace it with “AC”
In NOTE 2, delete “(a.c.)” and “(d.c.)”.
4 Modifications to
...

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