Optical fibre cables - Part 3-12: Outdoor cables - Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling

IEC 60794-3-12:2021 is available as IEC 60794-3-12:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60794-3-12:2021 is a detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling to ensure compatibility with ISO/IEC 11801-1. This document's requirements ensure that the ISO/IEC 11801-1 models work for generic cabling and system performances. Values in this document support these models. The requirements of the family specification IEC 60794-3-10 are applicable to cables covered by this document. Particular requirements detailed in Clause 5 either define a specific option relative to the requirements of IEC 60794-3-10 or define additional requirements. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of references to ISO/IEC 11801-1;
- removal of references to ISO/IEC 24702;
- incorporation of the OM5 cabled fibre performance category;
- incorporation of the OS1a cabled fibre performance category;
- cabled fibre performance categories OM1, OM2 and OS1 are no longer normative, and are retained for information.

Câbles à fibres optiques - Partie 3-12: Câbles extérieurs - Spécification particulière pour les câbles optiques de télécommunication destinés à être installés dans des conduites ou à être directement enterrés et utilisés dans le câblage de locaux

IEC 60794-3-12:2021 est disponible sous forme de IEC 60794-3-12:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente .
IEC 60794-3-12:2021 est une spécification particulière de câbles optiques de télécommunication destinés à être installés dans des conduites ou à être directement enterrés et utilisés dans les câblages de locaux. Le but est d’assurer la compatibilité avec l’ISO/IEC 11801‑1. Le présent document contient des exigences destinées à assurer le fonctionnement des modèles selon ISO/IEC 11801-1 concernant le câblage générique et les performances du système. Les valeurs indiquées du présent document sont compatibles avec ces modèles. Les exigences contenues dans la spécification de famille IEC 60794-3-10 sont applicables aux câbles couverts par le présent document. Les exigences particulières figurant à l’Article 5 définissent soit une option spécifique relative aux exigences de l’IEC 60794‑3‑10, soit des exigences supplémentaires. Cette troisième édition annule et remplace la deuxième édition parue en 2012. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajouts de références à l’ISO/IEC 11801-1;
- suppression des références à l’ISO/IEC 24702;
- intégration de la catégorie de performance de fibres câblées OM5;
- intégration de la catégorie de performance de fibres câblées OS1a;
- les catégories de performances des fibres câblées OM1, OM2 et OS1 ne sont plus normatives; elles sont conservées à titre d’information.

General Information

Status
Published
Publication Date
26-Jan-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
27-Jan-2021
Ref Project

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IEC 60794-3-12
Edition 3.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 3-12: Outdoor cables – Detailed specification for duct and directly buried
optical telecommunication cables for use in premises cabling
Câbles à fibres optiques –
Partie 3-12: Câbles extérieurs – Spécification particulière pour les câbles
optiques de télécommunication destinés à être installés dans des conduites ou
à être directement enterrés et utilisés dans le câblage de locaux
IEC 60794-3-12:2021-01(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60794-3-12
Edition 3.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 3-12: Outdoor cables – Detailed specification for duct and directly buried
optical telecommunication cables for use in premises cabling
Câbles à fibres optiques –
Partie 3-12: Câbles extérieurs – Spécification particulière pour les câbles
optiques de télécommunication destinés à être installés dans des conduites ou
à être directement enterrés et utilisés dans le câblage de locaux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-9323-2

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 60794-3-12:2021 © IEC 2021
CONTENTS

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

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General requirements ...................................................................................................... 6

5 Particular requirements ................................................................................................... 6

5.1 General ................................................................................................................... 6

5.2 MICE (mechanical, ingress, climatic and chemical and electromagnetic)

characteristics ........................................................................................................ 6

5.3 Transmission requirements ..................................................................................... 6

5.3.1 Attenuation of cabled fibre ............................................................................... 6

5.3.2 Fibre bandwidth requirements .......................................................................... 7

5.3.3 Polarization mode dispersion (PMD) requirements ........................................... 7

Bibliography ............................................................................................................................ 8

Table 1 – Multimode cable maximum attenuation coefficient (dB/km) ...................................... 7

Table 2 – Single-mode cable maximum attenuation coefficient (dB/km) .................................. 7

Table 3 – Multimode fibre minimum bandwidth (MHz·km) ........................................................ 7

---------------------- Page: 4 ----------------------
IEC 60794-3-12:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-12: Outdoor cables –
Detailed specification for duct and directly buried optical
telecommunication cables for use in premises cabling
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,

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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

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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 60794-3-12 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical

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

This third edition cancels and replaces the second edition published in 2012. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) addition of references to ISO/IEC 11801-1;
b) removal of references to ISO/IEC 24702;
c) incorporation of the OM5 cabled fibre performance category;
d) incorporation of the OS1a cabled fibre performance category;

e) cabled fibre performance categories OM1, OM2 and OS1 are no longer normative, and are

retained for information.
---------------------- Page: 5 ----------------------
– 4 – IEC 60794-3-12:2021 © IEC 2021
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/2027/CDV 86A/2064/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/standardsdev/publications.

This International Standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and

IEC 60794-3-10.

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 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 60794-3-12:2021 © IEC 2021 – 5 –
OPTICAL FIBRE CABLES –
Part 3-12: Outdoor cables –
Detailed specification for duct and directly buried optical
telecommunication cables for use in premises cabling
1 Scope

This part of IEC 60794 is a detailed specification for duct and directly buried optical

telecommunication cables for use in premises cabling to ensure compatibility with

ISO/IEC 11801-1. This document's requirements ensure that the ISO/IEC 11801-1 models work

for generic cabling and system performances. Values in this document support these models.

The requirements of the family specification IEC 60794-3-10 are applicable to cables covered

by this document. Particular requirements detailed in Clause 5 either define a specific option

relative to the requirements of IEC 60794-3-10 or define additional 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 60793-2-10:2019, Optical fibres – Part 2-10: Product specifications – Sectional

specification for category A1 multimode fibres

IEC 60793-2-50:2018, Optical fibres – Part 2-50: Product specifications – Sectional

specification for class B single-mode fibres
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 – General guidance

IEC 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification

IEC 60794-3-10, Optical fibre cables – Part 3-10: Outdoor cables – Family specification for duct,

directly buried and lashed aerial optical telecommunication cables
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
---------------------- Page: 7 ----------------------
– 6 – IEC 60794-3-12:2021 © IEC 2021
4 General requirements

The cable shall comply with the family specification, IEC 60794-3-10, and meet the

requirements which are defined in it, including requirements in the sectional specification,

IEC 60794-3. Particular requirements detailed in Clause 5 are optional, relative to the

requirements of IEC 60794-3-10, or define additional requirements.

The optical fibre contained in cables covered by this document shall comply with one of the

following standards, and meet the normative requirements defined within them as applicable:

• IEC 60793-2-50:2018, Annex A (single-mode B-652.D fibre sub-category);
• IEC 60793-2-50:2018, Annex F (single-mode B-657 fibres);

• IEC 60793-2-10:2019, Annex A (multimode fibre sub-categories A1-OM3, A1-OM4 and

A1-OM5).

To ensure compatibility with the ISO/IEC 11801 series, optical performance level requirements

are presented in terms of the performance classification codes for cabled optical fibre as

follows:
• OS1a: single-mode fibre, sub-categories B-652.D or B-657;
• OS2: single-mode fibre, sub-categories B-652.D or B-657;
• OM3: multimode fibre sub-category A1-OM3;
• OM4: multimode fibre sub-category A1-OM4;
• OM5: multimode fibre sub-categoryA1-OM5.

NOTE These codes are informative from the perspective of the requirements defined in this document. The OS1,

OM1 and OM2 performance classification codes for cabled optical fibre are no longer normative in

ISO/IEC 11801 (Parts 1 through 6). See ISO/IEC 11801-1:2017, Annex F, for more information.

5 Particular requirements
5.1 General

These requirements either define a specific option relative to the requirements of

IEC 60794‑3‑10 or define additional requirements.
5.2 MICE (mechanical, ingress, climatic and chemical and electromagnetic)
characteristics

Cables intended for installation in conformity with ISO/IEC 11801-1 and related standards may

require the specification of additional tests to ensure their suitability in the applicable

environments defined by the mechanical, ingress, climatic and chemical and electromagnetic

(MICE) classification. Such tests are outside the scope of IEC 60794 cable specifications, and

MICE criteria are not part of the requirements for IEC 60794 specifications. The MICE tests

may be the same as, similar to, or substantially different from, the tests required by IEC 60794

specifications, specifically those in IEC 60794-1-21, IEC 60794-1-22 and IEC 60794-1-23.

Cables manufactured per IEC 60794 specifications, may or may not meet the MICE criteria. For

supplemental discussion, see IEC TR 62362.
5.3 Transmission requirements
5.3.1 Attenuation of cabled fibre

Depending on the fibre category, the attenuation coefficient of the cabled fibre shall be less

than the maximum values in Table 1 for the multimode fibres and less than the maximum values

in Table 2 for single-mode fibres – for the wavelengths listed in Table 2.

The fibre category and performance level shall be agreed between customer and supplier.

---------------------- Page: 8 ----------------------
IEC 60794-3-12:2021 © IEC 2021 – 7 –
Table 1 – Multimode cable maximum attenuation coefficient (dB/km)
Fibre Attenuation coefficient Attenuation coefficient Performance codes
at 850 nm at 1 300 nm
IEC 60793-2-10, A1-OM3 3,0 1,5 OM3
IEC 60793-2-10, A1-OM4 3,0 1,5 OM4
IEC 60793-2-10, A1-OM5 3,0 1,5 OM5
Table 2 – Single-mode cable maximum attenuation coefficient (dB/km)
Fibre Wavelengths Maximum Performance codes
attenuation
nm coefficient
IEC 60793‑2‑50, B‑652.D ,B‑657.A1, 1 310, 1 383, 1 550 1,0 OS1a
B‑657.A2, B‑657.B2, B‑657.B3
1 310, 1 383, 1 550 0,4 OS2
5.3.2 Fibre bandwidth requirements
There are no bandwidth requirements on single-mode fibre.

For cables containing multimode fibres, the uncabled fibre shall be specified at one of the

performance levels defined in Table 3 in terms of minimum bandwidth (MHz·km), wavelength,

and type of measurement.

The fibre category and performance level shall be agreed between customer and supplier.

Table 3 – Multimode fibre minimum bandwidth (MHz·km)
Fibre Nominal Overfilled Overfilled Overfilled Effective Effective Performance
core launch launch launch modal modal codes
diameter bandwidth bandwidth bandwidth bandwidth bandwidth
a a
µm at 850 nm at 953 nm at 1 300 nm
at 850 nm at 953 nm
IEC 60793‑2‑10, 50 1 500 n/a 500 2 000 not OM3
A1‑OM3 specified
IEC 60793‑2‑10, 50 3 500 n/a 500 4 700 not OM4
A1‑OM4 specified
IEC 60793‑2
...

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