Test methods for electric cables with rated voltages up to and including 450/750 V

IEC 63294:2021 specifies the test methods for electric cables with rated voltages up to and including 450/750 V not included in the IEC 60811 series.

Méthodes d'essais pour les câbles électriques de tension assignée au plus égale à 450/750 V

L'IEC 63294:2021 spécifie les méthodes d'essais pour les câbles électriques de tension assignée au plus égale à 450/750 V, qui ne sont pas fournies dans la série IEC 60811.

General Information

Status
Published
Publication Date
09-Nov-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
10-Nov-2021
Ref Project

Buy Standard

Standard
IEC 63294:2021 - Test methods for electric cables with rated voltages up to and including 450/750 V
English and French language
58 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 63294
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Test methods for electric cables with rated voltages up to and including
450/750 V
Méthodes d'essais pour les câbles électriques de tension assignée au plus
égale à 450/750 V
IEC 63294:2021-11(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

variety of criteria (reference number, text, technical publications previews. With a subscription you will always

committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.

and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - IEC online collection - oc.iec.ch

webstore.iec.ch/advsearchform Découvrez notre puissant moteur de recherche et consultez

La recherche avancée permet de trouver des publications IEC gratuitement tous les aperçus des publications. Avec un

en utilisant différents critères (numéro de référence, texte, abonnement, vous aurez toujours accès à un contenu à jour

comité d’études, …). Elle donne aussi des informations sur adapté à vos besoins.
les projets et les publications remplacées ou retirées.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
Le premier dictionnaire d'électrotechnologie en ligne au
Restez informé sur les nouvelles publications IEC. Just
monde, avec plus de 22 000 articles terminologiques en
Published détaille les nouvelles publications parues.
anglais et en français, ainsi que les termes équivalents dans
Disponible en ligne et une fois par mois par email.
16 langues additionnelles. Egalement appelé Vocabulaire
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 63294
Edition 1.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Test methods for electric cables with rated voltages up to and including
450/750 V
Méthodes d'essais pour les câbles électriques de tension assignée au plus
égale à 450/750 V
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.20 ISBN 978-2-8322-1041-2

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63294:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 7

4 General requirements ...................................................................................................... 8

4.1 Sampling................................................................................................................. 8

4.2 Pre-conditioning ...................................................................................................... 8

4.3 Test temperature .................................................................................................... 8

4.4 Test voltage ............................................................................................................ 8

4.5 Test values ............................................................................................................. 8

5 Electrical test methods .................................................................................................... 8

5.1 Electrical resistance of conductors .......................................................................... 8

5.2 Voltage test carried out on completed cables .......................................................... 9

5.3 Voltage test on cores in water ................................................................................. 9

5.3.1 General ........................................................................................................... 9

5.3.2 Test sample ..................................................................................................... 9

5.3.3 Procedure ........................................................................................................ 9

5.3.4 Requirements .................................................................................................. 9

5.4 Insulation resistance ............................................................................................... 9

5.5 Insulation resistance at temperatures above 90 °C ............................................... 10

5.6 Long-term resistance of insulation to direct current ............................................... 11

5.6.1 Test sample ................................................................................................... 11

5.6.2 Procedure ...................................................................................................... 11

5.6.3 Requirements ................................................................................................ 11

5.7 Absence of faults in insulation............................................................................... 11

5.7.1 General ......................................................................................................... 11

5.7.2 Spark test ...................................................................................................... 12

5.7.3 Voltage test ................................................................................................... 12

5.8 Surface resistance of sheath ................................................................................. 12

5.8.1 Test samples ................................................................................................. 12

5.8.2 Procedure ...................................................................................................... 12

5.8.3 Requirements ................................................................................................ 13

6 Non-electrical test methods ........................................................................................... 13

6.1 Checking of the durability of colours and markings ................................................ 13

6.2 Measurement of thickness of insulation ................................................................. 13

6.2.1 Procedure ...................................................................................................... 13

6.2.2 Evaluation of results ...................................................................................... 13

6.3 Measurement of thickness of sheath ..................................................................... 13

6.3.1 Procedure ...................................................................................................... 13

6.3.2 Evaluation of results ...................................................................................... 13

6.4 Measurement of overall dimensions and ovality .................................................... 13

6.5 Solderability test for non-tinned conductors .......................................................... 14

6.5.1 General ......................................................................................................... 14

6.5.2 Selection of samples and preparation of test pieces ...................................... 14

6.5.3 Description of the solder bath ........................................................................ 14

6.5.4 Test procedure .............................................................................................. 15

---------------------- Page: 4 ----------------------
IEC 63294:2021 © IEC 2021 – 3 –

6.5.5 Requirements ................................................................................................ 15

6.6 Flexing test ........................................................................................................... 15

6.6.1 General ......................................................................................................... 15

6.6.2 Apparatus ...................................................................................................... 15

6.6.3 Sample preparation ....................................................................................... 16

6.6.4 Current applied on cores ............................................................................... 16

6.6.5 Voltage between cores .................................................................................. 16

6.6.6 Fault detection (construction of the flexing apparatus) ................................... 17

6.7 Static flexibility test ............................................................................................... 17

6.8 Bending test .......................................................................................................... 18

6.9 Wear resistance test ............................................................................................. 19

6.10 Drop test ............................................................................................................... 20

6.11 Void ...................................................................................................................... 20

6.12 Three-pulley flexing test ........................................................................................ 20

6.12.1 Test method .................................................................................................. 20

6.12.2 Requirements ................................................................................................ 22

6.13 Kink test ............................................................................................................... 22

6.13.1 Applicability ................................................................................................... 22

6.13.2 Apparatus ...................................................................................................... 22

6.13.3 Sample .......................................................................................................... 22

6.13.4 Test procedure .............................................................................................. 22

6.13.5 Requirements ................................................................................................ 22

6.14 Tests for mechanical properties after air oven ageing of insulation consisting

of rubber compound .............................................................................................. 23

6.14.1 General ......................................................................................................... 23

6.14.2 Sampling and preparation .............................................................................. 24

6.14.3 Ageing procedure .......................................................................................... 24

6.14.4 Preparation of test pieces and tensile test ..................................................... 24

6.15 Test for resistance to heat of textile braids ............................................................ 24

6.15.1 General ......................................................................................................... 24

6.15.2 Apparatus ...................................................................................................... 24

6.15.3 Test sample ................................................................................................... 24

6.15.4 Preparation .................................................................................................... 24

6.15.5 Test procedure .............................................................................................. 25

6.15.6 Requirements ................................................................................................ 25

6.16 Tesf for resistance of sheath to water ................................................................... 25

6.16.1 General ......................................................................................................... 25

6.16.2 Sampling and preparation of test pieces ........................................................ 25

6.16.3 Procedure ...................................................................................................... 26

6.16.4 Evaluation of results ...................................................................................... 26

6.17 Chemical test: Determination of halogens – Elemental test ................................... 26

6.17.1 Equipment ..................................................................................................... 26

6.17.2 Materials ....................................................................................................... 26

6.17.3 Procedure ...................................................................................................... 26

Annex A (informative) Cross-references table ...................................................................... 28

Bibliography .......................................................................................................................... 29

---------------------- Page: 5 ----------------------
– 4 – IEC 63294:2021 © IEC 2021

Figure 1 – Positioning of electrodes ...................................................................................... 11

Figure 2 – Flexing apparatus ................................................................................................ 16

Figure 3 – Static flexibility test .............................................................................................. 18

Figure 4 – Bending test apparatus ........................................................................................ 19

Figure 5 – Arrangement for wear-resistance test ................................................................... 20

Figure 6 – Modified carrier C ................................................................................................ 21

Figure 7 – Kink test apparatus .............................................................................................. 23

Figure 8 – Assembled test apparatus .................................................................................... 25

Table A.1 – Cross-references for tests .................................................................................. 28

---------------------- Page: 6 ----------------------
IEC 63294:2021 © IEC 2021 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEST METHODS FOR ELECTRIC CABLES WITH
RATED VOLTAGES UP TO AND INCLUDING 450/750 V
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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 63294 has been prepared by IEC technical committee 20: Electric cables. It is an

International Standard.

This first edition cancels and replaces IEC 60227-2:1997, IEC 60227-2:1997/AMD1:2003,

IEC 60245-2:1994, IEC 60245-2:1994/AMD1:1997, IEC 60245-2:1994/AMD2:1997, IEC 62821-

2:2015 and IEC 63010-2:2017. A table of cross-references for tests is given in Annex A.

The text of this International Standard is based on the following documents:
Draft Report on voting
20/1970/FDIS 20/1990/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.
---------------------- Page: 7 ----------------------
– 6 – IEC 63294:2021 © IEC 2021

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
IEC 63294:2021 © IEC 2021 – 7 –
TEST METHODS FOR ELECTRIC CABLES WITH
RATED VOLTAGES UP TO AND INCLUDING 450/750 V
1 Scope

This document specifies the test methods for electric cables with rated voltages up to and

including 450/750 V not included in the IEC 60811 series.
2 Normative references

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.

IEC 60811-201, Electric and optical fibre cables – Test methods for non‑metallic materials –

Part 201: General tests – Measurement of insulation thickness

IEC 60811-202, Electric and optical fibre cables – Test methods for non‑metallic materials –

Part 202: General tests – Measurement of thickness of non-metallic sheath

IEC 60811-203, Electric and optical fibre cables – Test methods for non‑metallic materials –

Part 203: General tests – Measurement of overall dimensions

IEC 60811-401:2012, Electric and optical fibre cables – Test methods for non‑metallic materials

– Part 401: Miscellaneous tests – Thermal ageing methods – Ageing in an air oven

IEC 60811-501, Electric and optical fibre cables – Test methods for non‑metallic materials –

Part 501: Mechanical tests – Tests for determining the mechanical properties of insulating and

sheathing compounds
IEC 62230, Electric cables – Spark-test method

IEC 60502-1, Power cables with extruded insulation and their accessories for rated voltages

from 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) – Part 1: Cables for rated voltages of 1 kV

m m
(U = 1,2 kV) and 3 kV (U = 3,6 kV)
m m

ISO 1302, Geometrical Product Specifications (GPS) – Indication of surface texture in technical

product documentation
3 Terms and definitions
No terms and definitions are listed in this document.

IEC and ISO maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 9 ----------------------
– 8 – IEC 63294:2021 © IEC 2021
4 General requirements
4.1 Sampling

If a marking is in relief in insulation or sheath, the samples used for the tests shall be taken so

as to include such marking.

For multicore cables, except for the test specified in 5.6 and in 6.2, not more than three cores

(of different colours, if applicable) shall be tested unless otherwise specified.

4.2 Pre-conditioning

All the tests shall be carried out not less than 16 h after the extrusion or vulcanization of the

insulating or sheathing compounds.
4.3 Test temperature

Unless otherwise specified in the relevant cable standard, tests shall be made at an ambient

temperature of (20 ± 15) °C.
4.4 Test voltage

Unless otherwise specified in the relevant cable standard, the test voltages shall be alternating

current of approximately sinewave form and of frequency between 49 Hz and 61 Hz. The ratio

with a tolerance of ±7 %.
of peak value to RMS value shall be equal to 2
The values quoted are RMS values.
4.5 Test values

Full test conditions (such as temperatures, durations) and full test requirements are not

specified in this document. It is intended that they should be specified by the relevant cable

standard.

Any test requirements which are given in this document may be modified by the relevant cable

standard to suit the needs of a particular type of cable.
5 Electrical test methods
5.1 Electrical resistance of conductors

In order to check the electrical resistance of conductors, the resistance of each conductor shall

be measured on a sample of cable of at least 1 m in length. The length of each sample shall be

measured.

If necessary, a correction to 20 °C and to a length of 1 km shall be obtained by the formula:

254,5 1 000
RR= ××
20 t
234,5 + t L
where
R is the resistance at 20 °C, in ohms/kilometre;
R is the resistance of L metres of cable at t °C, in ohms;

t is the temperature of the sample at the moment of measurement, in degrees Celsius;

---------------------- Page: 10 ----------------------
IEC 63294:2021 © IEC 2021 – 9 –

L is the length of the sample of cable, in metres (length of the complete sample and not of

the individual cores or wires).
5.2 Voltage test carried out on completed cables

A sample of cable as delivered shall be immersed in water. The length of the sample, the

temperature of the water and the duration of immersion and the test voltage shall be given in

the relevant cable standard.

A voltage shall be applied in turn between each conductor and all the others together, connected

to the metallic layer or metallic component, if any, or to the water; and then between all

conductors together and the metallic layer or metallic component, if any, or to the water.

No breakdown of the insulation shall occur during the test.
5.3 Voltage test on cores in water
5.3.1 General

The test applies to sheathed cables, braided cables and flat non-sheathed cables.

5.3.2 Test sample

Prepare a sample of cable 5 m long, by carefully removing, without damaging the cores, the

sheath or the overall braid and any other covering or fillers from a length of completed cable.

In the case of a flat non-sheathed cable, take a 5 m sample and make a cut in the insulation

between the cores and separate the cores by hand over a length of 2 m, without damaging the

cores.
5.3.3 Procedure

Immerse the sample in water at the temperature, and for the period specified in the relevant

cable standard. Ensure that the ends of the cores protrude above the water by a distance

sufficient to prevent excessive surface leakage when the test voltage is applied. Apply a voltage

between the conductors and the water, of the magnitude and for the time specified in the

relevant cable standard.
5.3.4 Requirements
No breakdown of the insulation shall occur during the test.
5.4 Insulation resistance

This test shall be made on the core samples, 5 m in length, previously submitted to the test

described in 5.3 or, if this is not applicable, to the test described in 5.2.

The sample shall be immersed in water previously heated to the temperature indicated in the

relevant cable standard. A length of about 0,25 m at each end of the sample shall be kept above

the water.
The length of the samples, t
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.