IEC 60811-508:2012

IEC 60811-508 ®
Edition 1.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation
and sheaths
Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines

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.

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CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

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IEC 60811-508 ®
Edition 1.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric and optical fibre cables – Test methods for non-metallic materials –

Part 508: Mechanical tests – Pressure test at high temperature for insulation

and sheaths
Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux

non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour

les enveloppes isolantes et les gaines

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 29.035.01; 29.060.20 ISBN 978-2-88912-984-3

– 2 – 60811-508  IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test method . 6
4.1 General . 6
4.2 Apparatus . 6
4.2.1 Air oven . 6
4.2.2 Indentation device . 7
4.3 Insulation . 7
4.3.1 Sample and test piece preparation . 7
4.3.2 Procedure . 7
4.4 Sheath . 9
4.4.1 Sample and test piece preparation for sheaths . 9
4.4.2 Procedure . 10
5 Test report. 11
Annex A (normative) Calculation of the compressing force . 15
Annex B (informative) Recommended performance requirement . 17
Bibliography . 18

Figure 1 – Indentation device . 12
Figure 2 – Measurement of indentation . 12
Figure 3 – Measurement of indentation for small test pieces . 13
Figure 4 – Flat cable with a flat smaller side . 13
Figure 5 – Indentation device for flat cables with a flat smaller side . 14

Table A.1 – General value for k . 15

60811-508  IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC AND OPTICAL FIBRE CABLES –
TEST METHODS FOR NON-METALLIC MATERIALS –

Part 508: Mechanical tests –
Pressure test at high temperature for insulation and sheaths

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.
International Standard IEC 60811-508 has been prepared by IEC technical committee 20:
Electric cables.
This Part 508 of IEC 60811 cancels and replaces Clause 8 of IEC 60811-3-1:1985, which is
withdrawn. Full details of the replacements are shown in Annex A of IEC 60811-100:2012.
Significant technical changes with respect to the previous edition are as follows:
– re-statement of oven characteristics, especially relating to anti-vibration and to
temperature control;
– enhanced detail as to the preparations and testing of flat cables;
– enhanced detail as to thickness and dimensional measurements.
See also the Foreword to IEC 60811-100:2012.

– 4 – 60811-508  IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
20/1304/FDIS 20/1353/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part of IEC 60811 shall be used in conjunction with IEC 60811-100.
A list of all the parts in the IEC 60811 series, published under the general title Electric and
optical fibre cables – Test methods for non-metallic materials, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60811-508  IEC:2012 – 5 –
INTRODUCTION
The IEC 60811 series specifies the test methods to be used for testing non-metallic materials
of all types of cables. These test methods are intended to be referenced in standards for
cable construction and for cable materials.
NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedd
...

IEC 60811-508 ®
Edition 1.1 2017-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation
and sheaths
Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines

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 Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
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documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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

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csc@iec.ch.
IEC 60811-508 ®
Edition 1.1 2017-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –

Part 508: Mechanical tests – Pressure test at high temperature for insulation

and sheaths
Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux

non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour

les enveloppes isolantes et les gaines

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.01; 29.060.20 ISBN 978-2-8322-4654-2

IEC 60811-508 ®
Edition 1.1 2017-07
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation
and sheaths
Câbles électriques et à fibres optiques – Méthodes d’essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines

– 2 – IEC 60811-508:2012+AMD1:2017 CSV
 IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test method . 6
4.1 General . 6
4.2 Apparatus . 6
4.2.1 Air oven . 6
4.2.2 Indentation device . 7
4.3 Insulation . 7
4.3.1 Sample and test piece preparation . 7
4.3.2 Procedure . 7
4.4 Sheath . 9
4.4.1 Sample and test piece preparation for sheaths . 9
4.4.2 Procedure . 10
5 Test report. 11
Annex A (normative) Calculation of the compressing force . 16
Annex B (informative) Recommended performance requirement . 18
Bibliography . 19

Figure 1 – Indentation device . 12
Figure 2 – Measurement of indentation . 12
Figure 3 – Measurement of indentation for small test pieces . 13
Figure 4 – Flat cable with a flat smaller side . 14
Figure 5 – Indentation device for flat cables with a flat smaller side . 15

Table A.1 – General value for k . 16

 IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC AND OPTICAL FIBRE CABLES –
TEST METHODS FOR NON-METALLIC MATERIALS –
Part 508: Mechanical tests –
Pressure test at high temperature for insulation and sheaths
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.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60811-508 edition 1.1 contains the first edition (2012-03) [documents 20/1304/FDIS and
20/1353/RVD] and its amendment 1 (2017-07) [documents 20/1735/FDIS and 20/1740/RVD].
In this Redline versi
...

IEC 60811-508 ®
Edition 1.2 2023-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation and
sheaths
Câbles électriques et à fibres optiques – Méthodes d'essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines

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 Secretariat 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 Products & Services Portal - products.iec.ch
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variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
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
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Le premier dictionnaire d'électrotechnologie en ligne au monde,
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avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
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Si vous désirez nous donner des commentaires sur cette
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IEC 60811-508 ®
Edition 1.2 2023-11
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation and
sheaths
Câbles électriques et à fibres optiques – Méthodes d'essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.01, 29.060.20 ISBN 978-2-8322-7792-8

IEC 60811-508 ®
Edition 1.2 2023-11
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation and
sheaths
Câbles électriques et à fibres optiques – Méthodes d'essai pour les matériaux
non-métalliques –
Partie 508: Essais mécaniques – Essai de pression à température élevée pour
les enveloppes isolantes et les gaines

– 2 – IEC 60811-508:2012+AMD1:2017
+AMD2:2023 CSV  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Test method . 6
4.1 General . 6
4.2 Apparatus . 7
4.2.1 Air oven . 7
4.2.2 Indentation device . 7
4.3 Insulation . 7
4.3.1 Sample and test piece preparation . 7
4.3.2 Procedure . 7
4.4 Sheath . 9
4.4.1 Sample and test piece preparation for sheaths . 9
4.4.2 Procedure . 10
5 Test report. 11
Annex A (normative) Calculation of the compressing force . 16
Annex B (informative) Recommended performance requirement . 18
Bibliography . 19

Figure 1 – Indentation device . 12
Figure 2 – Measurement of indentation . 12
Figure 3 – Measurement of indentation for small test pieces . 13
Figure 4 – Flat cable with a flat smaller side . 14
Figure 5 – Indentation device for flat cables with a flat smaller side . 15

Table A.1 – General value for k . 16

+AMD2:2023 CSV  IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRIC AND OPTICAL FIBRE CABLES –
TEST METHODS FOR NON-METALLIC MATERIALS –

Part 508: Mechanical tests –
Pressure test at high temperature for insulation and sheaths

FOREWORD
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This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60811-508 edition 1.2 contains the first edition (2012-03) [documents 20/1304/FDIS
and 20/1353/RVD], its amendment 1 (2017-07) [documents 20/1735/FDIS and
20/1740/RVD] and its amendment 2 (2023-11) [documents 20/1735/FDIS and
20/1740/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
– 4 – IEC 60811-508:2012+AMD1:2017
+AMD2:2023 CSV  IEC 2023
International Standard IEC 60811-508 has been prepared by IEC technical committee 20:
Electric cables.
Significant technical changes with respect to the previous edition are as follows:
– re-statement of oven characteristics, especially relating to anti-vibration and to
temperature
...