Optical fibre cables - Part 1-211: Generic specification - Basic optical cable test procedures - Environmental test methods - Sheath shrinkage, method F11

IEC 60794-1-211:2021 defines test procedures to measure the shrinkage of the sheath due to thermal exposure of cables. A first test method, F11A, is included for cables where the fibre or buffered fibre and the sheath of the cable are intended to be fully terminated into a connector at one or both cable ends. A second test method, F11B, is included in this document for sheath shrinkage testing for general purpose. See IEC 60794-1-2 for a reference guide to test methods of all types and for general requirements.

Câbles à fibres optiques - Partie 1-211: Spécification générique - Procédures fondamentales d’essais des câbles optiques - Méthodes d’essais d’environnement - Rétraction de la gaine, méthode F11

IEC 60794-1-211:2021 définit des procédures d’essai pour mesurer la rétraction de la gaine due à l’exposition thermique des câbles. Une première méthode d’essai, F11A, est incluse pour les câbles où la fibre ou la fibre sous revêtement protecteur et la gaine du câble sont destinées à être entièrement équipées d’un connecteur à l’une ou aux deux extrémités du câble. Une deuxième méthode d’essai, F11B, est incluse dans le présent document pour les essais de rétraction de la gaine des câbles destinés à un usage général. Voir l’IEC 60794-1-2 pour un guide de référence des méthodes d’essai de tous types et pour les exigences générales.

General Information

Status
Published
Publication Date
17-Feb-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
18-Feb-2021
Ref Project

Buy Standard

Standard
IEC 60794-1-211:2021 - Optical fibre cables - Part 1-211: Generic specification - Basic optical cable test procedures - Environmental test methods - Sheath shrinkage, method F11
English and French language
25 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 60794-1-211
Edition 1.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-211: Generic specification – Basic optical cable test procedures –
Environmental test methods – Sheath shrinkage, method F11
Câbles à fibres optiques –
Partie 1-211: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais d’environnement – Rétraction de la gaine,
méthode F11
IEC 60794-1-211:2021-02(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 have

committee, …). It also gives information on projects, replaced 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 once
and French, with equivalent terms in 18 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

plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez

webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un

La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour

en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.

comité d’études, …). Elle donne aussi des informations sur les

projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 000 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 16 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
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.
IEC online collection - oc.iec.ch
---------------------- Page: 2 ----------------------
IEC 60794-1-211
Edition 1.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-211: Generic specification – Basic optical cable test procedures –
Environmental test methods – Sheath shrinkage, method F11
Câbles à fibres optiques –
Partie 1-211: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais d’environnement – Rétraction de la gaine,
méthode F11
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-9467-3

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 60794-1-211:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Method F11A – Sheath shrinkage (cables to be terminated with connectors) ................... 6

4.1 Objective ................................................................................................................ 6

4.2 Sample ................................................................................................................... 7

4.3 Apparatus ............................................................................................................... 7

4.4 Procedure ............................................................................................................... 7

4.5 Requirements ......................................................................................................... 8

4.6 Details to be specified ............................................................................................. 9

4.7 Details to be reported ............................................................................................. 9

5 Method F11B – Sheath shrinkage (general purpose) ....................................................... 9

5.1 Objective ................................................................................................................ 9

5.2 Sample ................................................................................................................... 9

5.3 Apparatus ............................................................................................................... 9

5.4 Procedure ............................................................................................................... 9

5.5 Requirements ....................................................................................................... 10

5.6 Details to be specified ........................................................................................... 10

5.7 Details to be reported ........................................................................................... 10

Annex A (informative) Comparison between method F11A and method F11B ....................... 11

Bibliography .......................................................................................................................... 12

Figure 1 – Cable sample preparation ...................................................................................... 7

Figure 2 – Alternative cable sample preparation (cut ends) ..................................................... 8

Table A.1 – Comparison between method F11A and method F11B ....................................... 11

---------------------- Page: 4 ----------------------
IEC 60794-1-211:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-211: Generic specification –
Basic optical cable test procedures –
Environmental test methods – Sheath shrinkage, method F11
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 60794-1-211 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical

committee 86: Fibre optics. It is an International Standard.

This document cancels and replaces IEC 60794-1-22:2017. This edition constitutes a technical

revision.

This edition includes the following significant technical changes with respect to

IEC 60794-1-22:2017:

a) method F11 (cables intended for patch cords) of IEC 60794-1-22:2017 was renumbered

F11A and renamed as "sheath shrinkage (cables to be terminated with connectors)";

b) a second method F11B is newly included that was adapted from ANSI/TIA-455-86-A;

c) in method F11A, the thermal exposure from ambient to the specified temperature was

replaced by temperature cycling between a low and high temperature according to
IEC 60794-1-22, method F1;
---------------------- Page: 5 ----------------------
– 4 – IEC 60794-1-211:2021 © IEC 2021

d) in method F11A, the continuing of the test cycles until the shrinkage exhibits a variation less

than ±1 mm was replaced with a fixed number of cycles specified by the detail specification;

e) in method F11A, the average was changed to maximum sheath shrinkage that shall not

exceed the value specified in the relevant detail specification;

f) in both methods, the alternative that the sample may be cut to length and the length between

the cut sheath ends measured is added.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2074/FDIS 86A/2087/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.

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.

A list of all parts in the 60794 series, published under the general title Optical fibre cables, can

be found on the IEC website.

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

stability date indicated on the IEC website under "http://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: 6 ----------------------
IEC 60794-1-211:2021 © IEC 2021 – 5 –
INTRODUCTION

This document defines two test methods to measure the shrinkage of the sheath due to thermal

exposure of cables intended for termination with connectors and cables for general purpose.

This document cancels and replaces method F11 of IEC 60794-1-22:2017, which will be

withdrawn. It includes an editorial revision, based on the new structure and numbering system

for optical fibre cable test methods. Additionally, technical changes were implemented. The

environmental tests contained in IEC 60794-1-22:2017 will be individually numbered in the

IEC 60794-1-2xx series. Each test method is now considered to be an individual document

rather than part of a multi-test method compendium. Full cross-reference details are given in

IEC 60794-1-2.

This document includes a first method F11 of IEC 60794-1-22:2017 named "sheath shrinkage

test for cables intended for patch cords". This method was renumbered as method F11A in this

document. There are technical changes in method F11A. The thermal exposure from ambient

to the specified temperature was replaced by temperature cycling according to IEC 60794-1-22,

method F1. Also, the continuing of the test cycles until the shrinkage exhibits a variation less

than ±1 mm was replaced by a fixed number of cycles according to the detail specification.

This document includes a second method F11B for sheath shrinkage of cable for general

purpose. This test procedure adapts the method in ANSI/TIA-455-86-A.
The numbering of these tests continues the F-series numbering sequence of
IEC 60794-1-22:2017.

A test procedure other than method F11A and method F11B to measure the shrinkage exists.

Method F17 according to IEC 60794-1-22 defines shrinkage testing on a cable sample with a

minimum length of 10 m or longer by measuring the fibre protrusion and, indirectly, the buffered

fibre or fibre tube protrusion at both ends.

For electric and optical fibre cables, a shrinkage test for sheaths according to IEC 60811-503

exists that uses a nominal sample length of 500 mm and exposes the sample over a specified

temperature and time. Afterwards, the sample is allowed to cool in air to ambient temperature.

Five such thermal cycles are carried out.

IEC TR 62959 provides information on cable shrinkage characterisation of optical fibre cables

that consist of standard glass optical fibres for telecommunication applications. The

characterisation is directed to the effects of cable shrinkage or cable element shrinkage on the

termination of cables. Recommended test methods for the evaluation of cable shrinkage and

classification by several grades are given.
____________
Under preparation. Stage at the time of publication: IEC TR/TPUB 62959:2020.
---------------------- Page: 7 ----------------------
– 6 – IEC 60794-1-211:2021 © IEC 2021
OPTICAL FIBRE CABLES –
Part 1-211: Generic specification –
Basic optical cable test procedures –
Environmental test methods – Sheath shrinkage, method F11
1 Scope

This part of IEC 60794 defines test procedures to measure the shrinkage of the sheath due to

thermal exposure of cables.

A first test method, F11A, is included for cables where the fibre or buffered fibre and the sheath

of the cable are intended to be fully terminated into a connector at one or both cable ends.

A second test method, F11B, is included in this document for sheath shrinkage testing for

general purpose.

See IEC 60794-1-2 for a reference guide to test methods of all types and for general

requirements.
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 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General

IEC 60794-1-22:2017, Optical fibre cables – Part 1-22: Generic specification – Basic optical

cable test procedures – Environmental test methods
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60794-1-1 apply.

ISO and IEC 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
4 Method F11A – Sheath shrinkage (cables to be terminated with connectors)
4.1 Objective

The purpose of this test is to measure the shrinkage behaviour of the sheath due to thermal

exposure of cables intended to be terminated with connectors.
This test is not intended for connectorised cable assemblies.
---------------------- Page: 8 ----------------------
IEC 60794-1-211:2021 © IEC 2021 – 7 –
See Annex A for a comparison between method F11A and method F11B.
4.2 Sample

A 2 m length of cable shall be cut from the end of the cable and discarded in order to avoid end

effects. The test sample lengths shall be cut from the adjoining cable. Five test samples of the

length specified in the detail specification shall be cut from the cable.
– For test samples of a nominal 1 m length, cut 1 050 mm ± 5 mm.
– For test samples of a nominal length of 150 mm, cut 160 mm ± 5 mm.
4.3 Apparatus

A horizontal surface where the test samples are placed that permit free movement of the sheath.

For example, talc, paper or paper dusted with talc on the surface permits free movement of the

sheath.

A temperature chamber of appropriate size and a temperature sensing device. The temperature

chamber shall be able to accommodate the test samples and maintain the specified temperature

within ±3 °C.

A length measuring device of sufficient length with a minimum resolution of 1 mm for a sample

with a nominal 1 m length, or 0,15 mm for a sample with a nominal 150 mm length.
4.4 Procedure

The cable on the supply reel, or alternatively the cable coil, shall be conditioned for 24 h at

ambient temperature before cutting the test samples.

Two marks separated by the distance of the nominal test length per the detail specification (e.g.

1 000 mm, 150 mm), with a deviation not greater than ±1 mm, shall be applied to each test

sample, as shown in Figure 1.

Alternatively, the sample ends may be cut to the measurement length, L , using a razor knife.

This alternative is best suitable for a short sample length of 150 mm. Two marks longitudinally

to the cable axis shall be applied to both ends of each test sample to indicate the measurement

points, as shown in Figure 2.
Key
1 mark on cable sheath
2 cable sample
Figure 1 – Cable sample preparation
---------------------- Page: 9 ----------------------
– 8 – IEC 60794-1-211:2021 © IEC 2021
Key
1 mark on cable sheath
2 cable sample
Figure 2 – Alternative cable sample preparation (cut ends)

The distance (L ) between the marks or cut ends on each test sample shall be measured and

recorded.

The test samples are placed horizontally on a surface located in the temperature chamber in

such a manner as to permit free movement of the sheath. When space allows, the samples

should be placed into the chamber in a straight configuration. If the samples need to be coiled,

the test samples shall be coiled with a radius of not less than 150 mm still allowing free

movement of the sheath.

The cable samples shall be temperature cycled in accordance to IEC 60794-1-22, method F1.

The parameters specified in the detail specification shall be used. For more information on

cable shrinkage characterisation and guidance, see IEC TR 62959.

After the last cycle, allow the cable samples to recover for a minimum period of 1 h at ambient

temperature, unless otherwise specified in the detail specification.

The distance (L ) between the marks or cut ends on each test sample shall be measured and

recorded. If the samples have been coiled, straighten them for this measurement. When

straightened, the test pieces should not be elongated. If the coiled samples cannot be effectively

straightened for measurement, the test is rendered invalid.
The sheath shrinkage of each test sample is calculated as showed in Formula (1):
ΔL = L − L (1)
i 1,i 2,i
where
L is the initial distance measured between the marks or cut ends;
1,i
L is the final distance measured between the marks or cut ends;
2,i
i is the sample number (i = 1 to 5).
4.5 Requirements

The maximum sheath shrinkage value of all test samples shall not exceed the value specified

in the relevant detail specification.
---------------------- Page: 10 ----------------------
IEC 60794-1-211:2021 © IEC 2021 – 9 –
4.6 Details to be specified
The detail specification shall include the following information:
a) nominal test length of cable samples;
b) low and high exposure temperature;
c) soak time;
d) number of cycles;
e) maximum sheath shrinkage.
4.7 Details to be reported

The test report shall include, beside the specified parameters in the detail specification

(see 4.6), the following information, if applicable:
a) method of marking and length measurement;
b) sample configuration and arrangement on the surface;
c) type and preparation of the surface;
d) individual shrink values of all samples;
e) any deviations from this test method.
5 Method F11B – Sheath shrinkage (general purpose)
5.1 Objective

The purpose of this test method is to determine the linear dimensional changes in extruded

plastic cable sheath due to exposure at elevated temperatures.
See Annex A for a comparison between method F11A and method F11B.
5.2 Sample

A 2 m length of cable shall be cut from the end of the cable and discarded in order to avoid end

effects. The cable sample(s) shall be whole-cable section(s), with all components, including the

core, in place, unless otherwise specified. The number of samples specified shall be cut from

the adjoining cable and shall be 150 mm long.
5.3 Apparatus

A convection oven capable of maintaining a temperature within ±3 °C at the specified exposure

temperature.

A horizontal surface where the test sample(s) are placed that permit free movement of the

sheath. For example, talc, paper or paper dusted with talc on the surface permits free movement

of the sheath.

A linear scale or a precision calliper of sufficient length graduated in 0,15 mm or less divisions.

5.4 Procedure

The cable length shall be conditioned for a minimum of 24 h at ambient temperature prior to the

sample preparation.
---------------------- Page: 11 ----------------------
– 10 – IEC 60794-1-211:2021 © IEC 2021

Each sample shall be marked with reference marks along the longitudinal axis of the cable

sample. The marks shall be made at convenient positions as close as practical to the ends of

the sample. The marks shall not damage the cable sheath. Measure and record the initial

distance L between the opposite edges of the sample(s) at the reference marks. Alternatively,

the sample may be cut to length and the length between the cut sheath ends measured.

Place the sample(s) on a horizontal surface in the oven that permit free movement of the sheath.

Expose the sample(s) for the time period and at the temperature specified in the detail

specification.

At the end of the oven exposure period, recondition the sample(s) at ambient temperature for

minimum 1 h.

Measure and record the final distance L between the opposite edges of the sample(s) at the

reference marks.

The (absolute) sheath shrinkage of each test sample is calculated as showed in Formula (2):

L = L − L (2)
i 1,i 2,i
where
L is the initial distance measured between the marks;
1,i
L is the final distance measured between the marks;
2,i
i is the sample number (i = 1 to the number of test samples).
5.5 Requirements

Each sheath sample shrinkage (L ) shall not exceed the value specified in the relevant detail

specification.
5.6 Details to be specified
The detail specification shall include the following information:
a) number of cable samples;
b) exposure temperature;
c) time period;
d) maximum allowable sheath shrinkage.
5.7 Details to be reported

The test report shall include, beside the specified parameters in the detail specification

(see 5.6), the following information, if applicable:
a) method of marking and length measurement;
b) type and preparation of the surface;
c) individual shrink values of all samples;
d) any deviations from this test method.
---------------------- Page: 12 ----------------------
IEC 60794-1-211:2021 © IEC 2021 – 11 –
Annex A
(informative)
Comparison between method F11A and method F11B
Table A.1 shows a qualitative comparison between method F11A and method F11B.
Table A.1 – Comparison between method F11A and method F11B
Characteristic Method F11A Method F11B

Adapted from standard IEC 60794-1-22:2017, method F11 ANSI/TIA-455-86-A (FOTP-86)

Intended application Cables to be terminated with General purpose
connectors
Nominal sample length 1 m or 150 mm 150 mm
Number of samples 5 1 or more
Suitable for maintaining a specified
Required temperature chamber Suitable for temperature cycling
temperature

Thermal exposure procedure Temperature cycling according to Exposure at the specified

IEC 60794-1-22, method F1 temperature
Duration Specified soak time and number of Specified period
cycles

Determination of sheath Calculation of the absolute shrinkage Calculation of the absolute

shrinkage of each sample shrinkage of each sample
Requirements Maximum sheath shrinkage shall not Each sheath shrinkage shall not
exceed the specified value exceed the specified value
---------------------- Page: 13 ----------------------
– 12 – IEC 60794-1-211:2021 © IEC 2021
Bibliography

IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test

procedures – General guidance

IEC 60811-503, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 503: Mechanical tests – Shrinkage test for sheaths
IEC TR 62959, Optic
...

Questions, Comments and Discussion

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