EN 50525-1:2011

SLOVENSKI STANDARD
01-julij-2011
(OHNWULþQLNDEOL1L]NRQDSHWRVWQLHQHUJHWVNLNDEOL]QD]LYQRQDSHWRVWMRGR
YNOMXþQR988GHO6SORãQH]DKWHYH
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 Anforderunge
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
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
NORME EUROPÉENNE
May 2011
EUROPÄISCHE NORM
ICS 29.060.20 Supersedes HD 21.1 S4:2002, HD 22.1 S4:2002

English version
Electric cables -
Low voltage energy cables of rated voltages up to and including
450/750 V (U /U) -
Part 1: General requirements
Câbles électriques - Kabel und Leitungen -
Câbles d’énergie basse tension deStarkstromleitungen mit
tension assignée au plus égale à Nennspannungen bis 450/750 V (U /U) -
450/750 V (U /U) - Teil 1: Allgemeine Anforderungen
Partie 1: Exigences générales
This European Standard was approved by CENELEC on 2011-01-17. 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 Central Secretariat 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 Central Secretariat 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, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
-
Ref. No. EN 50525-1:2011 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric
cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50525-1 on 2011-01-17.
This document, which is one of a multipart series, supersedes HD 21.1 S4:2002 and
HD 22.1 S4:2002.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any
or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-17

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-17
___________
- 3 - EN 50525-1:2011
Contents
Page
Introduction . 5
1 Scop e . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Rated voltage . 7
5 Requirements for the construction of cables . 8
5.1 General . 8
5.2 Condu cto r s . 8
5.3 Insulation . 8
5.4 Core identification . 9
5.5 Assembly of cores . 10
5.6 Other components . 10
5.7 Sheath. 13
6 Marking . 15
6.1 Indication of origin . 15
6.2 Continuity of marking . 15
6.3 Use of the name CENELEC . 16
6.4 Code designation . 16
6.5 Additional voluntary marking . 16
6.6 Additional requirements . 16
7 Tests on completed cables . 16
7.1 General . 16
7.2 Electrical requirements . 16
7.3 Overall dimensions . 20
7.4 Mechanical strength of flexible cables . 20
7.5 Assessment of halogens . 20
8 Guide to use of the cables . 20
Annex A (normative) Mechanical tests – Requirements for flexible cables . 21
A.1 Two-pulley flexing test . 21
A.2 Wear resistance test . 21
A.3 Three-pulley test . 21
A.4 Kink test . 22
A.5 Test for separation of cores . 22
Annex B (normative) Assessment of halogens . 23
B.1 Requirements for extruded material . 23
B.2 Requirements for non-extruded materials . 24
Annex C (normative) Determination of halogens – Elemental test . 25
C.1 Equipment . 25
C.2 Materials . 25
C.3 Procedure . 26
Annex D (normative) Requirements for core identification of multicore cables
with more than five cores . 27
D.1 Core identification . 27

D.2 Marking by inscription . 27
D.3 Colour coding (pilot and marker system) . 27
Annex E (informative) Structure and content of EN 50525 and its derivation from
HD 21 and HD 22. 28
Bibliography . 31

Tables
Table 1 – Requirements for electrical tests for cables . 18
Table B.1 – Test method, measurement, requirements . 23
Table B.2 – Sequential test programme . 24
Table E.1 – General structure of EN 50525 . 28
Table E.2 – Specific structure of EN 50525 and its derivation from HD 21 and HD 22 . 29
Table E.3 – Location of each part of HD 21 and HD 22 . 30

- 5 - EN 50525-1:2011
Introduction
EN 50525 derives from CENELEC Harmonization Documents HD 21 and HD 22. It has the
following parts:
- Part 1: General requirements;
- Part 2: Cables for general applications;
- Part 3: Cables with special fire performance.
Parts 2 and 3 are further subdivided for the particular cables and applications.
NOTE Annex E gives a full description of the structure of EN 50525, its content and its derivation from HD 21 and
HD 22.
An intention of the conversion work, which forms part of an overall CENELEC initiative to
convert remaining HDs to ENs, is to create a structure for the EN that will be sufficiently
robust to ensure a simple means of making future additions or amendments.
As part of the work there has been a review of the market relevance of cable types in HD 21
and HD 22, and changes have been made accordingly.
Some matters previously in HD 21 and HD 22 are now in separate publications thus:
- Insulating, sheathing and covering materials – EN 50363 series;
- Electrical test methods – EN 50395;
- Non-electrical test methods – EN 50396.
The collective object of all parts of EN 50525 is:
- to standardise cables that are safe and reliable when properly selected, installed and
used;
- to state the characteristics and manufacturing requirements directly or indirectly bearing
on safety; and
- to specify methods for checking conformity with those requirements.
European and national regulations contain requirements and recommendations relating to the
environment. CENELEC TC 20 has published a Technical Report (TR) that offers guidance
and assistance to standard-writers of TC 20, to take into account the relevant environmental
aspects as far as they are specific to electric cables in normal use. The TR is
CLC/TR 62125, Environmental statement specific to TC 20 - Electric cables
This EN takes account, where appropriate and practicable, of the guidance in CLC/TR 62125.
Cables within EN 50525 satisfy the essential health and safety requirements of the Low
Voltage Directive (2006/95/EC).

1 Scope
This European Standard gives the general requirements for rigid and flexible energy cables
of rated voltages U /U up to and including 450/750 V a.c., 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 (a.c.) systems. Use of the cables in direct
current (d.c.) 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.
2 Normative references
The following referenced documents are indispensable for the application 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 One or more references to the standards below are in respect of a specific sub-division of that standard,
for instance a clause, a table, a class or a type. Cross-references to these standards are undated and, at all times,
the latest version applies.
EN 50267-2-1 Common test methods for cables under fire conditions – Tests on
gases evolved during combu
...