HD 21.1 S4:2002

SLOVENSKI STANDARD
01-februar-2003
1DGRPHãþD
SIST HD 21.1 S3:1998
.DEOLVSROLYLQLONORULGQRL]RODFLMR]DQD]QDþHQHQDSHWRVWLGRYNOMXþQR9
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Cables of rated voltages up to and including 450/750 V and having thermoplastic
insulation - Part 1: General requirements
Starkstromleitungen mit thermoplastischer Isolierhülle für Nennspannungen bis 450/750
V - Teil 1: Allgemeine Anforderungen
Conducteurs et câbles isolés avec des matériaux thermoplastiques de tension assignée
au plus égale à 450/750 V - Partie 1: Prescriptions générales
Ta slovenski standard je istoveten z: HD 21.1 S4:2002
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

HARMONIZATION DOCUMENT HD 21.1 S4
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT November 2002

ICS 29.060.20 Supersedes HD 21.1 S3:1997

English version
Cables of rated voltages up to and including 450/750 V
and having thermoplastic insulation
Part 1: General requirements
Conducteurs et câbles isolés  Starkstromleitungen mit thermoplastischer
avec des matériaux thermoplastiques Isolierhülle für Nennspannungen
de tension assignée au plus égale bis 450/750 V
à 450/750 V Teil 1: Allgemeine Anforderungen
Partie 1 : Prescriptions générales

This Harmonization Document was approved by CENELEC on 2002-09-01. CENELEC members are
bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
implementation of this Harmonization Document on a national level.

Up-to-date lists and bibliographical references concerning such national implementation may be obtained on
application to the Central Secretariat or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. HD 21.1 S4:2002 E
Foreword
This edition 4 of HD 21.1 has been prepared by the Technical Committee CENELEC TC 20,
Electric cables.
HD 21 was originally adopted by CENELEC on 9th July 1975.

Edition 2 of HD 21 was implemented on 1st January 1984. A third edition of Part 1 was published
in September 1997.
th
This 4 edition provides a full updating, including incorporation of amendments ratified during the
maintenance of Part 3 onwards of HD 21, and introduces other improvements.

HD 21.1 S4 is related to IEC 60227-1:1993, but is not directly equivalent.

HD 21 now has the following parts:

HD 21.1 S4 General requirements
HD 21.2 S3 Test methods
HD 21.3 S3 Non sheathed cables for fixed wiring
HD 21.4 S2 Sheathed cables for fixed wiring (Reprint)
HD 21.5 S3 Flexible cables (cords)
HD 21.6 (Spare)
HD 21.7 S2 Single core non-sheathed cables for internal wiring for a conductor
temperature of 90 °C
HD 21.8 S2 Single core non-sheathed cables for decorative chains (with A1 inclusive)
HD 21.9 S2 Single core non-sheathed cable for installation at low temperatures
HD 21.10 S2 Extensible leads
HD 21.11 S1 Cables for luminaires
HD 21.12 S1 Heat-resistant flexible cables (cords)
HD 21.13 S1 Oil resistant PVC sheathed cables with two or more conductors
HD 21.14 S1 Flexible cables (cords), insulated and sheathed with halogen-free
thermoplastic compounds
In order that this revision of Part 1 of HD 21 does not introduce unnecessary changes to long-
established clause numbers, the normative references (which would otherwise be inserted as
clause 2 are given in annex A.

The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as HD 21.1 S4 on 2002-09-01.

The following dates were fixed:

- latest date by which the existance of the HD (doa) 2003-03-01
has to be announced at national level

- latest date by which the HD has to be (dop) 2003-09-01
implemented at national level by publication of
a harmonized national standard or by
endorsement
- latest date by which the national standards (dow) 2003-09-01
conflicting with the HD have to be withdrawn

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex A is normative and annex B is informative.

- 3 - HD 21.1 S4:2002
Contents
Page
1 General
1.1 Scope. 4
1.2 Object. 4
1.3 Common Marking. 4

2 Definitions
2.1 Definitions relating to insulating and sheathing materials. 5
2.2 Definitions relating to the tests. 5
2.3 Rated voltage. 5

3 Marking
3.1 Indication of origin. 6
3.2 Continuity of marks. 7
3.3 Durability. 7
3.4 Legibility. 7
3.5 Common Marking. 7
3.6 Use of the name CENELEC . 8
3.7 Code designation . 8

4 Core identification
4.1 General requirements . 8
4.2 Colour schemes. 8
4.3 Colour combination green-and-yellow. 9
4.4 Core identification of flexible cables by the "Marking by inscription” method . 9

5 General requirements for the construction of cables

5.1 Conductors. 9
5.2 Insulation. 10
5.3 Filler. 15
5.4 Other components. 15
5.5 Sheath. 16
5.6 Tests on completed cables. 20

6 Guide to use of the cables. 24

Annex A (normative) Normative references . 25
Annex B (informative) National marking . 26

Table 1 – Requirements for the non-electrical tests for thermoplastic insulation. 12
Table 2 – Requirements for the non-electrical tests for thermoplastic sheath. 18
Table 3 – Requirements for electrical tests for thermoplastic insulated cables . 21

1 General
1.1    Scope
HD 21 applies to rigid and flexible cables with insulation and sheath, if any, based
on thermoplastic materials, of rated voltages U /U up to and including 450/750 V,
o
used in power installations.
NOTE  For some types of flexible cables, the term "cord" is used.

This Part 1 specifies the General Requirements applicable to these cables.

The test methods specified are given in Part 2 of this Harmonisation Document
(HD), or in the common test methods for cables given in EN 50265, EN 50267,
EN 50268 and EN 60811.
The particular types of cables are specified in Part 3 onwards of this HD, which
are hereafter referred to as "the particular specifications".

The code designations of these types of cables are in accordance with HD 361.

1.2 Object
The objects of this HD are to standardise cables and cords that are safe and
reliable when properly used, to state the characteristics and manufacturing
requirements directly or indirectly bearing on safety, and to specify methods for
checking conformity with those requirements.

1.3 Common Marking
1.3.1 General
The Common Marking () signifies that the manufacturer has been
assessed and his production is subjected to continuing surveillance in
accordance with the technical procedures by a recognised national
Approval Organisation which is a signatory to the "Agreement on the use
of a Commonly Agreed Marking for Cables and Cords complying with
Harmonised Specifications."
Compliance with this HD may be certified by the application of the
1)
agreed technical procedures for granting the Common Marking , which
are the recognised means of ensuring that a manufacturer is competent
and takes all reasonable care to produce cables complying with this HD.

The Common Marking may be used, under these conditions, by
manufacturers in countries which have implemented this HD and in
which the national Approval Organisations are signatories to the
Agreement.
NOTE  See annex B to Part 1 for guidance on national marking.

1)
These are given in Appendices 4 and 5 of the 'Agreement on the use of a Commonly Agreed Marking for Cables and
Cords complying with Harmonised Specifications'.

- 5 - HD 21.1 S4:2002
1.3.2 Extensible leads
For extensible leads the Common Marking, as defined in paragraph one
of 1.3.1 is shown by a special mark ( COIL or CCCCC)
in association with the indication of origin.

This mark signifies that the coiling process has been carried out in a
controlled manner and that the product will meet the requirements of this
HD. The application of this additional mark also signifies that the
producer of the extensible lead is subject to regular and systematic
surveillance by a signatory to the agreement as a condition for use of that
mark.
2  Definitions
2.1 Definitions relating to insulating and sheathing materials

2.1.1
type of compound
the category in which a compound is placed according to its properties, and
determined by specific tests. The type designation is not directly related to the
composition of the compound
2.1.2
polyvinyl chloride compound (PVC)
combinations of materials, of which polyvinyl chloride is the characteristic
constituent, suitably selected, proportioned and treated which meet the
requirements given in the particular specification

2.2 Definitions relating to the tests

2.2.1
type tests (Symbol T)
tests required to be made before supplying a type of cable covered by this
standard on a general commercial basis, in order to demonstrate satisfactory
performance characteristics to meet the intended application. These tests are of
such a nature that, after they have been made, they need not be repeated unless
changes are made in the cable materials, design or type of manufacturing
process which might change the performance characteristics

2.2.2
sample tests (Symbol S)
tests made on samples of completed cable, or components taken from a
completed cable adequate to verify that the finished product meets the design
specifications
2.2.3
routine tests (Symbol R)
tests made on all production cable lengths to demonstrate their integrity

2.3 Rated voltage
The rated voltage of a cable is the reference voltage for which the cable is
designed, and which serves to define the electrical tests.

The rated voltage is expressed by the combination of two values U /U, expressed
o
in volts:
U being the r.m.s. value between any insulated conductor and "earth" (metal
o
covering of the cable or the surrounding medium);

U being the r.m.s. value between any two phase-conductors of a multicore
cable or of a system of single-core cables.

In an alternating current system, the rated voltage of a cable shall be at least
equal to the nominal voltage of the system for which it is intended.

This condition applies both to the value U and to the value U.
o
In a direct current system, the nominal voltage between conductors shall be not
higher than 1,5 times the rated voltage (U) of the cable, and the nominal voltage
between any conductor and earth sh
...