IEC 60794-1-101:2024
(Main)Optical fibre cables - Part 1-101: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Tensile, method E1
Optical fibre cables - Part 1-101: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Tensile, method E1
IEC 60794-1-101:2024 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.
This document defines test procedures to be used in establishing uniform requirements for tensile performance.
Throughout this document the wording "optical cable" includes optical fibre units, microduct fibre units, etc.
See IEC 60794-1-2 for general requirements and definitions and for a complete reference guide to test methods of all types.
Câbles à fibres optiques - Partie 1-101: Spécification générique - Procédures fondamentales d’essais des câbles optiques - Méthodes d’essais mécaniques - Traction, méthode E1
L'IEC 60794-1-101:2024 s'applique aux câbles à fibres optiques destinés à être utilisés dans les équipements de télécommunications et les dispositifs utilisant des techniques analogues, ainsi qu'aux câbles constitués de fibres optiques d'une part et de conducteurs électriques d'autre part.
Le présent document définit les procédures d'essai à utiliser en vue d'établir des exigences uniformes pour les performances en traction.
Dans le présent document, l'expression "câble optique" englobe des assemblages de fibres optiques, des assemblages de fibres pour microconduits, etc.
Se reporter à l'IEC 60794-1-2 pour les exigences générales et les définitions, et un guide de référence complet pour tous les types de méthodes d'essai.
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Standards Content (Sample)
IEC 60794-1-101 ®
Edition 1.0 2024-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-101: Generic specification – Basic optical cable test procedures –
Mechanical tests methods – Tensile, method E1
Câbles à fibres optiques –
Partie 1-101: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais mécaniques – Traction, méthode E1
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IEC 60794-1-101 ®
Edition 1.0 2024-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-101: Generic specification – Basic optical cable test procedures –
Mechanical tests methods – Tensile, method E1
Câbles à fibres optiques –
Partie 1-101: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais mécaniques – Traction, méthode E1
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-8878-8
– 2 – IEC 60794-1-101:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Method E1: Tensile performance . 7
4.1 Object . 7
4.2 Sample length . 7
4.3 Apparatus . 7
4.4 Procedure . 8
4.4.1 General requirements and preparation . 8
4.4.2 Procedure . 9
4.5 Requirements . 9
4.6 Details to be specified . 9
4.7 Details to be reported . 9
Figure 1 – Tensile performance measuring apparatus . 7
Figure 2 – Example of tensile performance measuring apparatus using transfer devices
and chuck drums . 8
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-101: Generic specification –
Basic optical cable test procedures –
Mechanical tests methods – Tensile, method E1
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
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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shall not be held responsible for identifying any or all such patent rights.
IEC 60794-1-101 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 60794-1-21:2015, which will be withdrawn. It includes
an editorial revision, based on the new structure and numbering system for optical fibre cable
test methods.
– 4 – IEC 60794-1-101:2024 © IEC 2024
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2359/CDV 86A/2420/RVC
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/publications.
A list of all parts in the IEC 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
This document cancels and replaces test method E1 of IEC 60794-1-21:2015, which will be
withdrawn. It includes an editorial revision, based on the new structure and numbering system
for optical fibre cable test methods. The mechanical tests contained in IEC 60794-1-21:2015
will be individually numbered in the IEC 60794-1-1xx 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.
– 6 – IEC 60794-1-101:2024 © IEC 2024
OPTICAL FIBRE CABLES –
Part 1-101: Generic specification –
Basic optical cable test procedures –
Mechanical tests methods – Tensile, method E1
1 Scope
This part of IEC 60794 applies to optical fibre cables for use with telecommunication equipment
and devices employing similar techniques, and to cables having a combination of both optical
fibres and electrical conductors.
This document defines test procedures to be used in establishing uniform requirements for
tensile performance.
Throughout this document the wording "optical cable" includes optical fibre units, microduct
fibre units, etc.
See IEC 60794-1-2 for general requirements and definitions and for a complete reference guide
to test methods of all types.
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 60793-1-22, Optical fibres – Part 1-22: Measurement methods and test procedures –
Length measurement
IEC 60793-1-46, Optical fibres – Part 1-46: Measurement methods and test procedures –
Monitoring of changes in optical transmittance
IEC 60794-1-1:2023, Optical fibre cables – Part 1-1: Generic specification – General
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
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 terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 Method E1: Tensile performance
4.1 Object
This test method applies to optical fibre cables which are tested at a particular tensile strength
to examine the behaviour of either the attenuation or the fibre elongation strain, or both, as a
function of the load on a cable which can occur during installation and operation. This method
is intended to be non-destructive.
4.2 Sample length
Length under tension ≥50 m unless otherwise defined in the relevant specification. For cables
requiring specialized anchoring devices (e.g. OPGW, all-dielectric self-supporting (ADSS),
heavy wire armored cables, etc.), the minimum length shall be 25 m.
Short lengths in the tensile test will adversely affect the accuracy of the measurement. The
lengths shown above are the recommended minimum lengths for this test.
Total sample length is longer than the length under tension to allow for clamping and connection
to test equipment.
4.3 Apparatus
The apparatus shall consist of
a) either an attenuation measuring apparatus for the determination of attenuation changes
(see IEC 60793-1-46), or a fibre elongation strain measuring apparatus
(see IEC 60793-1-22, method C: Fibre elongation), or both;
b) a tensile strength measuring apparatus which can accommodate the minimum length to be
tested. Transfer devices can be used for testing longer samples under tension
(see Figure 2). The diameters of sheaves in the transfer device shall be no smaller than the
minimum bending diameter of the cable under test; for example, 1 m diameter;
c) a load cell with a maximum error of ±3 % of its maximum range;
d) a clamping device to secure all cable components at the ends of the length under test: care
should be taken that the specific method of capturing the cable components does not affect
the results. A mandrel is frequently an appropriate device, with a diameter for example 1 m,
but not less than the minimum bending diameter specified for the cable.
If required, mechanical or electrical means for measuring the cable load or elongation, per the
detail specification shall be provided.
Examples of suitable apparatus are shown in Figure 1 and Figure 2.
Figure 1 – Tensile performance measuring apparatus
– 8 – IEC 60794-1-101:2024 © IEC 2024
Figure 2 – Example of tensile performance measuring apparatus
using transfer devices and chuck drums
4.4 Procedure
4.4.1 General requirements and preparation
a) Unless otherwise specified, the conditions for testing shall be in accordance with the
expanded test conditions as defined in IEC 60794-1-2.
b) Cable should be loaded into tensile apparatus and cable ends should be secured in such a
way that all cable components, including fibres, are restricted in movement and no slippage
occurs. For most cable constructions (e.g. stranded type cables), clamping on cable
elements, except the fibres, is practical and sufficient to obtain either attenuation changes
or the maximum allowable pulling load and the strain margin of the cable or both. However,
for certain cable constructions (e.g. single loose tube), it can be necessary to prevent the
fibres from slipping to obtain the correct strain margin figures.
For aerial cable types, if required by the detail specification, the fixing of the cable can be
made by means of the anchoring devices relevant to the type of cable considered. For
certain heavily armoured cables, a clamping device involving a stocking grip or similar
anchoring device can be used.
c) Connect the test fibre of the cable under tensile test to the measurement apparatus. For the
pulse delay (time of flight) technique of method C of IEC 60793-1-22, care shall be taken
that, during the pulling of the sample, the reference length does not change.
d) The tension shall be continuously increased to the required value(s) given in the relevant
specification.
e) Either the change of attenuation or fibre strain, or both, shall be recorded as a function of
cable load or elongation.
f) For cables with a large number of fibres, either a multiple attenuation or fibre strain
measuring device, or both, can be used.
g) Either a representative number of fibres or a number of test cycles (typically one), or both,
shall be specified in the relevant specification.
NOTE The number of tested fibres in a cable can be specified as recommended in IEC 60794-1-1:2023,
Annex B.
h) The readings taken at the end of the time periods stated in 4.4.2 should be stable (i.e. within
measurement uncertainty) before the loads are changed or the test
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