IEC 60794-1-305:2023

IEC 60794-1-305
®

Edition 1.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Optical fibre cables –
Part 1-305: Generic specification – Basic optical cable test procedures – Cable
element test methods – Ribbon tear (separability), Method G5

Câbles à fibres optiques –
Partie 1-305: Spécification générique – Procédures fondamentales d’essai des
câbles optiques – Méthodes d’essai des éléments de câble – Déchirure du ruban
(séparabilité), Méthode G5

IEC 60794-1-305:2023-01(en-fr)

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IEC 60794-1-305

®


Edition 1.0 2023-01




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Optical fibre cables –

Part 1-305: Generic specification – Basic optical cable test procedures – Cable

element test methods – Ribbon tear (separability), Method G5



Câbles à fibres optiques –

Partie 1-305: Spécification générique – Procédures fondamentales d’essai des


câbles optiques – Méthodes d’essai des éléments de câble – Déchirure du ruban

(séparabilité), Méthode G5












INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.180.10 ISBN 978-2-8322-6304-4




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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 60794-1-305:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 Method G5: Ribbon tear (separability) . 7
5.1 Object . 7
5.2 Sample . 7
5.3 Apparatus . 8
5.4 Procedure . 8
5.5 Requirements . 9
5.6 Details to be specified . 9
5.7 Details to be reported . 9

Figure 1 – Sample preparation for ribbon separability test. 8
Figure 2 – Separability procedure . 9

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IEC 60794-1-305:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

OPTICAL FIBRE CABLES –

Part 1-305: Generic specification – Basic optical cable test procedures –
Cable element test methods – Ribbon tear (separability), Method G5

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
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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 60794-1-305 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This first edition of IEC 60794-1-305 cancels and replaces method G5 of the second edition of
IEC 60794-1-23 published in 2019. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the second
edition of IEC 60794-1-23:2019:
a) the optical cable element test methods contained in IEC 60794-1-23:2019 will now be
individually numbered in the IEC 60794-1-3xx 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.

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– 4 – IEC 60794-1-305:2023 © IEC 2023
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2249/FDIS 86A/2271/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/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,
• replaced by a revised edition, or
• amended.

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IEC 60794-1-305:2023 © IEC 2023 – 5 –
INTRODUCTION
The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed
that compliance with this document may involve the use of a patent. IEC takes no position
concerning the evidence, validity, and scope of this patent right.
The holder of this patent right has assured IEC that s/he is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world.
In this respect, the statement of the holder of this patent right is registered with IEC. Information
may be obtained from the patent database available at http://patents.iec.ch.
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those in the patent database. IEC shall not be held
responsible for identifying any or all such patent rights.

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– 6 – IEC 60794-1-305:2023 © IEC 2023
OPTICAL FIBRE CABLES –

Part 1-305: Generic specification – Basic optical cable test procedures –
Cable element test methods – Ribbon tear (separability), Method G5



1 Scope
This part of IEC 60794 describes test procedures to be used in establishing uniform
requirements for optical fibre ribbons as optical fibre cable elements for the mechanical
property-tear (separability).
This document 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.
NOTE Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre
units, etc.
This test is applicable for edge-bonded ribbons and encapsulated ribbons specified in
IEC 60794-1-31, and not intended to be used for partially-bonded ribbons.
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 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 60794-1-31, Optical fibre cables – Part 1-31: Generic specification – Optical cable elements
– Optical fibre ribbon
3 Terms and definitions
No terms and definitions are listed in this document.
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 General requirements
IEC 60794-1-2 is the reference guide to test methods of all types. It shall be considered for
general requirements and definitions.

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IEC 60794-1-305:2023 © IEC 2023 – 7 –
5 Method G5: Ribbon tear (separability)
5.1 Object
The purpose of this test is to ensure sufficient tear resistance for ribbons where the fibres are
not required to be separable, or to ensure sufficient separability of the fibres for ribbons where
the fibres are required to be separated. The intention of this test is to be able to tear the ribbon
by hand without damage to the fibre coatings.
5.2 Sample
A number of samples of fibre ribbon, as specified in the detail specification, typically 3 to 5,
shall be selected from the ribbon or ribbons to be tested. The length of each sample shall be
sufficient to provide the number of test specimens as detailed below.
For an n fibre ribbon, n/2 specimens are taken from each of the samples above. Each specimen
shall be 100 mm minimum in length, consistent with Figure 1.
Prepare the n/2 specimens involving increasing numbers of fibres to be separated as a ribbon
unit: that is, a specimen for fibre 1; a specimen for fibres 1 to 2; a specimen for fibres 1 to 3;
etc.
The fibres to be tested are separated with a knife or other suitable method on a suitable length
of no less than 30 mm for clamping, as shown in Figure 1.
For the first sample, the preparation of the test sequence shall consist in separating one fibre
from the other fibres in the ribbon in the first specimen. Then separate a unit of two fibres from
the next specimen. After that, units of three, four, and so on, fibres are separated in the other
specimens, up to a unit of n/2 fibres in the last specimen.
Do the same preparation for all the other samples.
NOTE If n is an odd number, n/2 in the above description is replaced with (n-1)/2.

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– 8 – IEC 60794-1-305:2023 © IEC 2023
Dimensions in millimetres

Figure 1 – Sample preparation for ribbon separability test
5.3 Apparatus
The
...