IEC 60794-5-10:2014
(Main)Optical fibre cables - Part 5-10: Family specification - Outdoor microduct optical fibre cables, microducts and protected microducts for installation by blowing
Optical fibre cables - Part 5-10: Family specification - Outdoor microduct optical fibre cables, microducts and protected microducts for installation by blowing
IEC 60794-5-10:2014 is a family specification that covers outdoor microduct optical fibre cables for installation by blowing and the associated microducts, which together make up a microduct optical fibre cable system. Although primarily designed for use with outdoor microduct applications, the cable products specified herein may be used individually for short lengths in other applications as agreed upon between supplier and customer. These may include short runs inside a building or in other outdoor applications, such as a transition between separate (unconnected) microduct systems, or from a microduct system to some other protective structure such as a cable conduit or tray. Systems built with components covered by this standard are subject to the requirements of IEC 60794-5 where applicable. Keywords: outdoor microduct optical fibre cables, installation by blowing
Câbles à fibres optiques - Partie 5-10: Spécification de famille - Câbles extérieurs à fibres optiques en micro-conduit, micro-conduits et micro-conduits protégés pour installation par soufflage
IEC 60794-5-10:2014 est une spécification de famille qui couvre les câbles extérieurs à fibres optiques en micro-conduit destinés à être installés par soufflage, et les micro-conduits associés, constituant ensemble un système de câbles à fibres optiques en micro-conduit. Bien qu'ils soient principalement conçus pour être utilisés avec des applications pour micro-conduit extérieur, les produits câbles ici spécifiés peuvent être utilisés individuellement sur de courtes longueurs dans d'autres applications, après accord entre le fournisseur et le client. Ceux-ci peuvent inclure de courtes longueurs à l'intérieur d'un bâtiment ou dans d'autres applications à l'extérieur, telles qu'une transition entre des systèmes de micro-conduits séparés (non connectés), ou un système de micro-conduit vers une autre structure protectrice telle qu'un conduit ou un chemin de câble. Les systèmes intégrant des éléments couverts par la présente norme sont soumis aux exigences de l'IEC 60794-5, le cas échéant. Mots clés: câbles extérieurs à fibres optiques en micro-conduit, installés par soufflage
General Information
Standards Content (Sample)
IEC 60794-5-10 ®
Edition 1.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 5–10: Family specification – Outdoor microduct optical fibre cables,
microducts and protected microducts for installation by blowing
Câbles à fibres optiques –
Partie 5–10: Spécification de famille – Câbles extérieurs à fibres optiques en
micro-conduit, micro-conduits et micro-conduits protégés pour installation par
soufflage
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
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@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.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des
CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
csc@iec.ch.
IEC 60794-5-10 ®
Edition 1.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 5–10: Family specification – Outdoor microduct optical fibre cables,
microducts and protected microducts for installation by blowing
Câbles à fibres optiques –
Partie 5–10: Spécification de famille – Câbles extérieurs à fibres optiques en
micro-conduit, micro-conduits et micro-conduits protégés pour installation par
soufflage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 33.180.01, 33.180.10 ISBN 978-2-8322-1374-2
– 2 – 60794-5-10 © IEC:2014
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Symbols . 8
4 General requirements . 9
4.1 Construction . 9
4.1.1 General . 9
4.1.2 Microduct optical fibre cables. 10
4.1.3 Microduct . 10
4.1.4 Protected microduct . 10
4.1.5 Microduct fittings . 10
4.1.6 Microduct hardware . 11
4.2 Optical fibres . 11
4.3 Installation performance tests . 11
4.3.1 Installation conditions . 11
4.3.2 Tests applicable . 11
4.4 Mechanical and environmental tests . 12
5 Microduct optical fibre cable . 12
5.1 Tests applicable . 12
5.2 Tensile performance . 12
5.3 Crush . 13
5.4 Impact . 13
5.5 Repeated bending . 13
5.6 Torsion . 13
5.7 Kink . 14
5.8 Bend . 14
5.9 Temperature cycling . 14
5.10 Water penetration . 15
5.11 Ageing . 15
5.12 Ribbon strippability . 15
5.13 Fibre ribbon separability. 15
6 Microduct. 15
6.1 Tests applicable . 15
6.2 Tensile performance . 16
6.3 Crush . 16
6.4 Impact . 16
6.5 Repeated bending . 16
6.6 Torsion . 17
6.7 Kink . 17
6.8 Bend . 17
6.9 Microduct route verification test . 17
6.10 Microduct pressure withstand . 17
6.11 Ageing . 18
7 Protected microduct(s) . 18
60794-5-10 © IEC:2014 – 3 –
7.1 Tests applicable . 18
7.2 Tensile performance . 18
7.3 Crush . 19
7.4 Impact . 19
7.5 Repeated bending . 19
7.6 Kink . 19
7.7 Bend . 20
7.8 Microduct route verification test . 20
7.9 Microduct pressure withstand . 20
7.10 Ageing . 20
Annex A (informative) Examples of microduct optical fibre cables and microducts . 21
Annex B (informative) Family specifications for microduct optical fibre cable,
microduct and protected microduct (blank detail specifications and minimum
requirements) . 23
B.1 Microduct optical fibre cable description . 23
B.2 Microduct description . 24
B.3 Protected microduct description . 25
Annex C (normative) Product constructions . 26
Annex D (normative) Transmission requirements . 29
D.1 Attenuation of cabled fibre . 29
D.2 Fibre bandwidth requirements . 30
Annex E (normative) IEC 60794-1-21, Method Exx – Microduct inner clearance test . 31
E.1 Object . 31
E.2 General . 31
E.3 Sample . 31
E.4 Test equipment . 31
E.5 Procedure . 31
E.6 Requirements . 31
E.7 Details to be recorded . 31
Bibliography . 33
Figure A.1 – Microduct optical fibre cables (not to scale) . 21
Figure A.2 – Protected microduct in pre-installed ducts (not to scale) . 21
Figure A.3 – Protected microduct with tight integral outer duct (not to scale) . 22
Table 1 – Tests applicable for installation performance . 12
Table 2 – Tests applicable for mechanical and environmental performance of microduct
cable. 12
Table 3 – Tests applicable for mechanical and environmental performance of a
microduct . 15
Table 4 – Tests applicable for mechanical and environmental performance of a
protected microduct . 18
Table C.1 – Outdoor microduct optical fibre cable construction . 26
Table C.2 – Microduct construction . 27
Table C.3 – Protected microduct construction . 28
Table D.1 – Multimode maximum cable attenuation coefficient (dB/km) . 29
Table D.2 – Single-mode maximum cable attenuation coefficient (dB/km) – Premises
cabling applications . 29
– 4 – 60794-5-10 © IEC:2014
Table D.3 – Single-mode maximum cable attenuation coefficient (dB/km) – All other
applications . 29
Table D.4 – Minimum multimode fibre bandwidth (MHz × km) . 30
60794-5-10 © IEC:2014 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 5–10: Family specification –
Outdoor microduct optical fibre cables, microducts and protected
microducts
for installation by blowing
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 60794-5-10 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
CDV Report on voting
86A/1496/CDV 86A/1542/RVC
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.
– 6 – 60794-5-10 © IEC:2014
A list of all parts of 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 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
60794-5-10 © IEC:2014 – 7 –
OPTICAL FIBRE CABLES –
Part 5-10: Family specification –
Outdoor microduct optical fibre cables, microducts and protected
microducts for installation by blowing
1 Scope
This part of IEC 60794 is a family specification that covers outdoor microduct optical fibre
cables for installation by blowing and the associated microducts, which together make up a
microduct optical fibre cable system. Although primarily designed for use with outdoor
microduct applications, the cable products specified herein may be used individually for short
lengths in other applications as agreed upon between supplier and customer. These may
include short runs inside a building or in other outdoor applications, such as a transition
between separate (unconnected) microduct systems, or from a microduct system to some
other protective structure such as a cable conduit or tray.
Systems built with components covered by this standard are subject to the requirements of
IEC 60794-5 where applicable.
Annex A shows examples of microduct optical fibre cables and microducts. Annex B describes
a blank detail specification for outdoor microduct optical fibre cables and the associated
microducts, and incorporates some minimum requirements. Detail product specifications may
be prepared on the basis of this family specification using Annex B as a guide. Annex C
provides normative requirements for microduct optical fibre cables.
The parameters specified in this standard may be affected by measurement uncertainty
arising either from measurement errors or calibration errors due to lack of suitable standards.
Acceptance criteria should be interpreted with respect to this consideration.
The number of fibres and microducts tested shall be representative of the microduct optical
fibre cable design and should be agreed between customer and supplier.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60304, Standard colours for insulation for low-frequency cables and wires
IEC 60793-1-40, Optical fibres – Part 1-40: Measurement methods and test procedures –
Attenuation
IEC 60793-2-10, Optical fibres – Part 2-10: Product specifications – Sectional specification for
category A1 multimode fibres
IEC 60793-2-50, Optical fibres – Part 2-50: Products specification – Sectional specification for
class B single-mode fibres
IEC 60794 (all parts), Optical fibre cables
– 8 – 60794-5-10 © IEC:2014
IEC 60794-1-1, 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
IEC 60794-1-22:2012, Optical fibre cables – Part 1-22: Generic specification – Basic optical
cable test procedures – Environmental test methods
IEC 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable
test procedures – Cable elements test methods
IEC 60794-1-24, Optical fibre cables – Part 1-24: Generic specification – Basic optical cable
test procedures – Electrical test methods
IEC 60794-2, Optical fibre cables – Part 2: Indoor optical fibre cables – Sectional specification
IEC 60794-3, Optical fibre cables – Part 3: Sectional specification – Outdoor cables
IEC 60794-4, Optical fibre cables – Part 4: Sectional specification – Aerial optical cables
along electrical power lines
IEC 60794-5, Optical fibre cables – Part 5: Sectional specification – Microduct cabling for
installation by blowing
IEC 60794-5-20, Optical fibre cables – Part 5-20: Family specification – Outdoor microduct
fibre units, microducts and protected microducts for installation by blowing
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 60811-601, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 601: Physical tests – Measurement of the drop-point of filling compounds
IEC 60811-602, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 602: Physical tests – Separation of oil in filling compounds
IEC 60811-604, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 604: Physical tests – Measurement of absence of corrosive components in filling
compounds
ISO/IEC 11801, Information technology − Generic cabling for customer premises
3 Symbols
For the purposes of this document, the following symbols apply.
∆D Minimum wall thickness
∆D’ Minimum thickness of the outer sheath of the protected microduct
d Nominal outer diameter of the microduct cable
___________
To be published.
60794-5-10 © IEC:2014 – 9 –
DS Detail specification
ID Nominal inner diameter of the microduct
OD Nominal outer diameter of the microduct
OD’ Nominal outer diameter of the protected microduct
T Temperature cycling test low-temperature limit (usage and storage) according to
A1
IEC 60794-1-22, Method F1
T Temperature cycling test secondary low-temperature limit for extended storage
A2
temperature range according to IEC 60794-1-22, Method F1
T Temperature cycling test high-temperature limit (usage and storage) according to
B1
IEC 60794-1-22, Method F1
T Temperature cycling test secondary high-temperature limit for extended storage
B2
temperature range according to IEC 60794-1-22, Method F1
t Temperature cycling dwell time
n × d The product of a variable and the cable outer diameter used for determining
appropriate sizes for bends, mandrels, etc.
n × OD The product of a variable and the outer diameter of the microduct used for
determining appropriate sizes for bends, mandrels, etc.
n × OD’ The product of a variable and the outer diameter of the protected microduct used
for determining appropriate sizes for bends, mandrels, etc.
W Weight of 1 km of microduct, protected microduct or microduct optical fibre cable
4 General requirements
4.1 Construction
4.1.1 General
In addition to the construction requirements of IEC 60794-5, where applicable, the following
considerations apply to outdoor microduct optical fibre cables and their corresponding
microducts and protected microducts.
The products covered in this specification shall be designed and manufactured for expected
operating lifetimes of at least 20 years. The microduct optical fibre cables are designed to be
installed in microducts or protected microducts and in appropriate housings. The microducts
and protected microducts that are compatible for use with microduct optical fibre cables are
defined in this standard. Microduct optical fibre cables are optimized for installation and
operational life in these microducts.
It shall be possible to install or remove the microduct optical fibre cable from microduct or
protected microduct by blowing during the operational lifetime, except under the following
conditions:
a) products are compromised by multiple installation or removal operations;
b) microducts fouled with sediment, debris or other foreign matter due to inadequate
maintenance;
c) microducts subsequently damaged by extrinsic factors such as diggings, earth upheavals,
etc.
In such cases, the affected section of microduct shall be cleared or repaired, or products
replaced prior to any microduct cable installations.
The microduct fitness should be verified with dimensional clearance and static pressure
testing of the microduct route.
– 10 – 60794-5-10 © IEC:2014
The materials in the microduct optical fibre cable, microduct or protected microduct shall not
present a health hazard within its intended use.
4.1.2 Microduct optical fibre cables
Microduct optical fibre cables are suitable for installation by blowing into a microduct.
Although not specifically addressed by cable products specifications such as IEC 60794-2,
IEC 60794-3 or IEC 60794-4, cable products specifically designed for installation by blowing
into microducts may also comply with other such industry standards and specifications.
However, they are often not as mechanically robust as traditional outdoor optical fibre cables
and, therefore, require the use of suitable installation and handling practices to prevent
damage. Ad hoc installation practices could degrade optical performance or reduce the
products’ operating lifetimes.
4.1.3 Microduct
A microduct suitable for installation of microduct cables is a small, flexible, lightweight tube
with an outer diameter typically less than 16 mm. Compared to microduct fibre units (see
IEC 60794-5-20), microduct cables are more mechanically robust, but they place greater
reliance on microducts and protected microducts or appropriate closures to provide
mechanical protection than do traditional cables. Therefore, a microduct shall meet the
realistic impact, compression and bending requirements for an application. A protected
microduct may be required.
Microducts shall be able to resist pressure differences needed for installation by blowing. The
microducts shall be circular and uniform in cross-section throughout their length and their
inner surface may have a low coefficient of friction. Inner and outer diameters shall be
specified. As an option, a supplier may provide a special lining or lubricating coating on the
interior of the microduct to aid installation. These layers should not reduce the specified
inside diameter of the microduct.
Microducts generally are intended for benign installation within ducts or as components within
a protected microduct as described in 4.1.1.3. In all cases, it shall be possible to identify each
individual microduct throughout its length. When using colours they shall conform to
IEC 60304.
Microducts installed outdoors and not occupied shall be sealed at each end to prevent the
introduction of moisture, debris, insects or other such foreign contaminants that could
subsequently hinder the successful installation of cable. Microducts installed outdoors and not
immediately occupied shall be tested for obstruction prior to use.
4.1.4 Protected microduct
A protected microduct is one or more microducts surrounded by a protective sheath, a larger
protective duct and/or an integral thick sheath such that it complies with the requirements of
Clause 7. A protected microduct can provide additional crush and impact protection compared
to a stand-alone microduct. This additional protection may be needed for a specific operating
environment or installation method. The protective sheath may include an integrated layer of
armouring or thicker outer sheath. In all cases, it shall be possible to identify each individual
microduct throughout its length. When using colours, they shall conform to IEC 60304.
4.1.5 Microduct fittings
Microduct fittings are components needed to physically align, connect and seal the junction
between two or more sections of microduct, or to connect microduct to hardware. Multiple
microducts may be connected in series in order to support extended microduct cable
installation distances, or connected in a branch-type configuration with multiple output termini
for a given input, within the same system. The latter may be employed in campus type local
area networks (LANs) or fibre-to-the-premises (FTTP) applications to allow for additional
flexibility that can support frequent changes to the physical optical distribution system.
60794-5-10 © IEC:2014 – 11 –
Fittings should be appropriate to the microduct construction. Mechanical and environmental
performance requirements of fittings may also require that such be tested while attached to
sections of ducting (or hardware) to ensure intermateability and operational compatibility. The
specific physical and material attributes of any fittings used should be agreed between
customer and supplier.
Microduct fittings shall be able to resist pressure differences needed for installing microduct
cables by blowing. Fittings shall allow for the smooth transition of microduct cables between
successive sections of microduct, or between microducts and hardware, and shall be
constructed and installed to prevent jamming of the microduct cable at splice, branch or other
connection points under maximum installation pressures.
Successive sections of microduct may also be welded or otherwise secured together along
the same longitudinal axis without the use of mechanical fittings. Such junctions shall meet
the same mechanical and dimensional requirements as for joints made using mechanical
fittings.
Translucent or transparent materials may be used to support the identification of populated
microducts, and for troubleshooting installation related issues.
4.1.6 Microduct hardware
Microduct hardware includes the housings and closures that support the termination of
microduct cables, to include splicing or connectorization. Because microduct cables are
generally compatible with traditional outdoor fibre optic cable hardware, accounting for the
relatively small size, no specific requirements for microduct hardware are included herein. In
some applications, it may be appropriate to use hardware that is compatible with the
microducts in order to create a sealed microduct cabling system. One example is when empty
microducts are pre-installed in hardware to support future microduct cable placement.
4.2 Optical fibres
There shall be no fibre splice in a delivered length unless otherwise agreed by customer and
supplier.
It shall be possible to identify each individual fibre throughout the length of the microduct
cable.
The transmission performance shall be in accordance with Annex D.
4.3 Installation performance tests
4.3.1 Installation conditions
A test route may be used to verify the field performance of a microduct cable, microduct,
and/or protected microduct as agreed between customer and supplier. Ambient conditions can
affect installation performance and therefore should be monitored. Alternately, the supplier
can provide performance data from a specified test route under specific ambient conditions
using a specified installation method.
Verifying that a microduct cable or microduct can be installed using a blown installation
technique is critical. Any installation performance requirement shall be agreed upon between
customer and supplier.
4.3.2 Tests applicable
The tests that are applicable for installation performance are given in Table 1.
– 12 – 60794-5-10 © IEC:2014
Table 1 – Tests applicable for installation performance
Characteristics Family requirements Test methods Remarks
General requirements Agreement between customer and supplier
Route verification test Agreement between customer and supplier IEC 60794-1-21,
Method E23
Installation test Agreement between customer and supplier IEC 60794-1-21,
Method E24
4.4 Mechanical and environmental tests
Based on the expected operating conditions over the life of the product, including the
mechanical loads exerted on the product during installation, the following sections specify
product performance for microduct cables, microducts and protected microducts.
5 Microduct optical fibre cable
5.1 Tests applicable
The tests that are applicable for mechanical and environmental performance are given in
Table 2.
Table 2 – Tests applicable for mechanical and environmental performance of microduct
cable
Characteristics Family requirements Test methods Remarks
Tensile performance 5.2 IEC 60794-1-21,
Method E1
Crush 5.3 IEC 60794-1-21,
Method E3
Impact 5.4 IEC 60794-1-21,
Method E4
Repeated bending 5.5 IEC 60794-1-21,
Method E6
Torsion 5.6 IEC 60794-1-21,
Method E7
Kink 5.7 IEC 60794-1-21,
Method E10
Bend 5.8 IEC 60794-1-21,
Method E11B
Temperature cycling 5.9 IEC 60794-1-22,
Method F1
Water penetration 5.10 IEC 60794-1-22,
Method F5B
Ageing 5.11 IEC 60794-1-22,
Method F9
Fibre ribbons (if used)
Ribbon stripping 5.12 IEC 60794-1-21,
Method E5B
Separability of individual fibres 5.13 IEC 60794-1-23,
from ribbon Method G5
5.2 Tensile performance
a) Family requirements
Under short-term tensile load the fibre strain shall not exceed 60 % of the fibre proof
strain. After removal of load, there shall be no change in attenuation. Other criteria may be
agreed between customer and supplier.
60794-5-10 © IEC:2014 – 13 –
Under visual examination without magnification there shall be no damage to the sheath or
to the cable elements.
b) Test conditions
Method: IEC 60794-1-21, Method E1
Length under tension: Not less than 50 m. Shorter lengths may be used by
agreement between customer and supplier, taking into
account the measurement accuracy and end effects
Fibre length: Finished cable length
Tensile load on cable: 1 × W
Diameter of test pulleys: Not less than the minimum loaded bending diameter
specified for the microduct optical fibre cable
5.3 Crush
a) Family requirements
After removal of the short-term load, there shall be no change in attenuation. Under visual
examination, there shall be no damage to the microduct cable. The imprint of the plate or
mandrel on the microduct cable is not considered mechanical damage.
b) Test conditions
Method: IEC 60794-1-21, Method E3A
Load (plate/plate): 500 N
Duration of load: 1 min
5.4 Impact
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath or
to the cable elements. The imprint of the striking surface on the sheath is not considered
mechanical damage.
The residual increase in attenuation shall be <0,1 dB at 1 550 nm.
b) Test conditions
Method: IEC 60794-1-21, Method E4
Number of impacts: One in 3 different places spaced not less than 500 mm
apart
Striking surface radius: 300 mm
Impact energy: 1 J
5.5 Repeated bending
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath
and to the cable elements.
b) Test conditions
Method: IEC 60794-1-21, Method E6
Bending diameter: 40 × d
Load: Adequate to assure uniform contact with the mandrel
Number of cycles: 25
5.6 Torsion
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath or
to the cable elements.
– 14 – 60794-5-10 © IEC:2014
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, Method E7
Length under test: 2 m
5.7 Kink
a) Family requirements
Under visual examination, without magnification, there shall be no damage to the cable.
b) Test conditions
Method: IEC 60794-1-21, Method E10
Minimum diameter: 40 × d
5.8 Bend
a) Family requirements
There shall be no change in attenuation after the test when measured at room
temperature.
If required, the change in attenuation when tested at –30 °C shall be ≤0,1 dB for single-
mode fibre and <=0,4 dB for multimode fibre.
b) Test conditions
Method: IEC 60794-1-21, Method E11A
Diameter of mandrel: 40 × d
Number of turns/helix: 4
Number of cycles: 3
5.9 Temperature cycling
a) Family requirements
Attenuation measurements shall be taken during the last cycle.
For T to T there shall be no change in attenuation as defined in IEC 60794-1-1.
A1 B1
For T to T and T to T , the change in attenuation coefficient shall be:
A1 A2 B1 B2
– ≤0,15 dB/km for single-mode fibre and shall be reversible to measurement uncertainty
when measured in the 1 550 nm region.
– ≤0,3 dB/km for multimode fibre and shall be reversible to measurement uncertainty
when measured in the 1 300 nm region.
b) Test conditions
Method: IEC 60794-1-22, Method F1
Sample length under test: Finished microduct cable, length of at least 1 000 m.
High temperature, TB2: +60 °C to +70 °C, depending on customer requirements.
High temperature, TB1: +30 °C to +60 °C depending on customer requirements.
Low temperature, TA1: –15 °C.
Low temperature, TA2: TA1 to –30 °C or –40 °C depending on customer
requirements.
NOTE Other temperature values corresponding to specific climate conditions can be agreed between supplier
and customer.
Number of cycles: 2
60794-5-10 © IEC:2014 – 15 –
5.10 Water penetration
a) Family requirements
The cable shall not propagate water longitudinally according to requirements of
IEC 60794-1-2, Method F5B.
b) Test conditions
Method: IEC 60794-1-22, Method F5B
5.11 Ageing
a) Family requirements: according to 11.5 of IEC 60794-1-22:2012, Method F9
b) Test conditions
Method: IEC 60794-1-22, Method F9
5.12 Ribbon strippability
a) Family requirements
At least 25 mm of the ribbon matrix and the fibres’ protective coatings shall be removable
with commercially available stripping tools with no fibre breakage. Any remaining coating
residue shall be readily removable using isopropyl alcohol wipes.
b) Test conditions
Method:
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...