SIST EN IEC 60793-2-60:2026

SLOVENSKI STANDARD
01-januar-2026
Optična vlakna - 2-60. del: Specifikacije izdelka - Področna specifikacija za
enorodovna vlakna razreda C za notranje povezovanje (IEC 60793-2-60:2025)
Optical fibres - Part 2-60: Product specifications - Sectional specification for class C
single-mode interconnection fibres (IEC 60793-2-60:2025)
Lichtwellenleiter - Teil 2-60: Produktspezifikationen - Rahmenspezifikation für Einmoden-
Verbindungsfasern der Kategorie C (IEC 60793-2-60:2025)
Fibres optiques - Partie 2-60: Spécifications de produits - Spécification intermédiaire
pour les fibres d’interconnexion unimodales de classe C (IEC 60793-2-60:2025)
Ta slovenski standard je istoveten z: EN IEC 60793-2-60:2025
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60793-2-60

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2025
ICS 33.180.10 Supersedes EN 60793-2-60:2008
English Version
Optical fibres - Part 2-60: Product specifications - Sectional
specification for class C single-mode interconnection fibres
(IEC 60793-2-60:2025)
Fibres optiques - Partie 2-60: Spécifications de produits - Lichtwellenleiter - Teil 2-60: Produktspezifikationen -
Spécification intermédiaire pour les fibres d'interconnexion Rahmenspezifikation für Einmoden-Verbindungsfasern der
unimodales de classe C Kategorie C
(IEC 60793-2-60:2025) (IEC 60793-2-60:2025)
This European Standard was approved by CENELEC on 2025-11-03. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60793-2-60:2025 E

European foreword
The text of document 86A/2599/FDIS, future edition 2 of IEC 60793-2-60, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60793-2-60:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-11-30
document have to be withdrawn
This document supersedes EN 60793-2-60:2008 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60793-2-60:2025 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60793-1-34 NOTE Approved as EN IEC 60793-1-34
IEC 60793-1-42 NOTE Approved as EN 60793-1-42
IEC 60793-1-53 NOTE Approved as EN 60793-1-53
IEC 60793-1-54 NOTE Approved as EN IEC 60793-1-54
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-20 - Optical fibres - Part 1-20: Measurement EN 60793-1-20 -
methods and test procedures - Fibre
geometry
IEC 60793-1-21 - Optical fibres - Part 1-21: Measurement EN 60793-1-21 -
methods and test procedures - Coating
geometry
IEC 60793-1-22 - Optical fibres - Part 1-22: Measurement EN IEC 60793-1-22 -
methods and test procedures - Length
measurement
IEC 60793-1-30 - Optical fibres - Part 1-30: Measurement EN 60793-1-30 -
methods and test procedures - Fibre proof
test
IEC 60793-1-31 - Optical fibres - Part 1-31: Measurement EN IEC 60793-1-31 -
methods and test procedures - Tensile
strength
IEC 60793-1-32 - Optical fibres - Part 1-32: Measurement EN IEC 60793-1-32 -
methods and test procedures - Coating
strippability
IEC 60793-1-33 - Optical fibres - Part 1-33: Measurement EN 60793-1-33 -
methods and test procedures - Stress
corrosion susceptibility
IEC 60793-1-40 - Optical fibres - Part 1-40: Attenuation EN IEC 60793-1-40 -
measurement methods
IEC 60793-1-44 - Optical fibres - Part 1-44: Measurement EN IEC 60793-1-44 -
methods and test procedures - Cut-off
wavelength
IEC 60793-1-45 - Optical fibres - Part 1-45: Measurement EN IEC 60793-1-45 -
methods and test procedures - Mode field
diameter
IEC 60793-1-46 - Optical fibres - Part 1-46: Measurement EN IEC 60793-1-46 -
methods and test procedures - Monitoring
of changes in attenuation
Publication Year Title EN/HD Year
IEC 60793-1-47 - Optical fibres - Part 1-47: Measurement EN IEC 60793-1-47 -
methods and test procedures -
Macrobending loss
IEC 60793-1-50 - Optical fibres - Part 1-50: Measurement EN 60793-1-50 -
methods and test procedures - Damp heat
(steady state) tests
IEC 60793-1-51 - Optical fibres - Part 1-51: Measurement EN 60793-1-51 -
methods and test procedures - Dry heat
(steady state) tests
IEC 60793-1-52 - Optical fibres - Part 1-52: Measurement EN 60793-1-52 -
methods and test procedures - Change of
temperature tests
IEC 60793-2 - Optical fibres - Part 2: Product EN IEC 60793-2 -
specifications - General
IEC 60793-2-60 ®
Edition 2.0 2025-09
INTERNATIONAL
STANDARD
Optical fibres -
Part 2-60: Product specifications - Sectional specification for class C single-
mode interconnection fibres
ICS 33.180.10  ISBN 978-2-8327-0707-4

IEC 60793-2-60:2025-09(en)
IEC 60793-2-60:2025 © IEC 2025
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, symbols, and abbreviated terms . 6
3.1 Terms and definitions. 6
3.2 Symbols and abbreviated terms . 6
4 Specifications . 6
4.1 General . 6
4.2 Dimensional requirements . 7
4.3 Mechanical requirements . 8
4.4 Transmission requirements . 8
4.5 Environmental requirements . 9
4.5.1 General . 9
4.5.2 Transmission requirements . 10
4.5.3 Mechanical requirements . 10
Annex A (normative) Family specification for C1 single-mode fibres. 12
A.1 General . 12
A.2 Dimensional requirements . 12
A.3 Mechanical requirements . 12
A.4 Transmission requirements . 13
A.5 Environmental requirements . 13
A.5.1 General . 13
A.5.2 Transmission requirements . 13
A.5.3 Mechanical requirements – Coating strip force . 14
Annex B (normative) Family specification for C2 single-mode fibres. 15
B.1 General . 15
B.2 Dimensional requirements . 15
B.3 Mechanical requirements . 15
B.4 Transmission requirements . 15
B.5 Environmental requirements . 16
B.5.1 General . 16
B.5.2 Transmission requirements . 16
B.5.3 Mechanical requirements – Coating strip force . 16
Annex C (normative) Family specification for C3 single-mode fibres . 17
C.1 General . 17
C.2 Dimensional requirements . 17
C.3 Mechanical requirements . 17
C.4 Transmission requirements . 18
C.5 Environmental requirements . 18
C.5.1 General . 18
C.5.2 Transmission requirements . 18
C.5.3 Mechanical requirements – Coating strip force . 18
Annex D (normative) Family specification for C4 single-mode fibres . 19
D.1 General . 19
D.2 Dimensional requirements . 19
D.3 Mechanical requirements . 19
IEC 60793-2-60:2025 © IEC 2025
D.4 Transmission requirements . 20
D.5 Environmental requirements . 20
D.5.1 General . 20
D.5.2 Transmission requirements . 20
D.5.3 Mechanical requirements – Coating strip force . 20
Bibliography . 21

Table 1 – List of families and main differences . 7
Table 2 – Dimensional attributes and measurement methods . 7
Table 3 – Requirements common to class C fibres . 8
Table 4 – Mechanical attributes and measurement methods . 8
Table 5 – Mechanical requirements common to class C fibres . 8
Table 6 – Transmission attributes and measurement methods . 9
Table 7 – Transmission requirements common to class C fibres . 9
Table 8 – Transmission attributes required in family specifications . 9
Table 9 – Environmental attributes and test methods . 9
Table 10 – Environment-dependent mechanical or transmission attributes and test
methods . 10
Table 11 – Tensile strength requirements common to class C fibres . 10
Table 12 – Stress corrosion susceptibility requirements common to class C fibres . 11
Table A.1 – Dimensional requirements for C1 fibres. 12
Table A.2 – Mechanical requirements for C1 fibres . 12
Table A.3 – Transmission requirements for C1 fibres . 13
Table A.4 – Environment-dependent transmission requirements for C1 fibres . 13
Table A.5 – Environment-dependent mechanical requirements for C1 fibres . 14
Table B.1 – Dimensional requirements for C2 fibres. 15
Table B.2 – Mechanical requirements for C2 fibres . 15
Table B.3 – Transmission requirements for C2 fibres . 16
Table B.4 – Environment-dependent transmission requirements for C2 fibres . 16
Table B.5 – Environment-dependent mechanical requirements for C2 fibres . 16
Table C.1 – Dimensional requirements for C3 fibres . 17
Table C.2 – Mechanical requirements for C3 fibres . 17
Table C.3 – Transmission requirements for C3 fibres . 18
Table C.4 – Environment-dependent transmission requirements for C3 fibres . 18
Table C.5 – Environment-dependent mechanical requirements for C3 fibres . 18
Table D.1 – Dimensional requirements for C4 fibres . 19
Table D.2 – Mechanical requirements for C4 fibres . 19
Table D.3 – Transmission requirements for C4 fibres . 20
Table D.4 – Environment-dependent transmission requirements for C4 fibres . 20

IEC 60793-2-60:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Optical fibres -
Part 2-60: Product specifications - Sectional specification
for class C single-mode interconnection fibres

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60793-2-60 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
This second edition cancels and replaces the first edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) replacement of "intraconnection" with "interconnection" and addition of the definition of
"interconnection fibres";
b) modification of the nominal MFD limit of C1 fibres;
c) addition of "Primary coating diameter-coloured" limits for class C fibres and change of
"Primary coating diameter-uncoloured" limits for class C_80 fibres;
IEC 60793-2-60:2025 © IEC 2025
d) change of coating strip force limits for class C1, class C2, and class C3 fibres;
e) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" and revision of
"Note b" in Table 6;
f) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" and deletion of
the "Note" in Table 8;
g) addition of 200 μm coating diameter requirements for C1_125 fibres and change of coating
diameters limits for C1_80 fibres in Table A.1;
h) addition of 200 µm coating diameter requirements for C1_125 fibres and change of coating
strip force limits in Table A.2 and in Table A.5;
i) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength", modification of
the "Cable cut-off wavelength" limit and addition of a new "Note" in Table A.3;
j) addition of a transmission requirements at 1 625 nm and deletion of 1 310 nm for C1 fibres
in Table A.4;
k) modification of "Fibre cut-off wavelength" limits of C3 fibres in Table C.3;
l) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" for C4 fibres in
Table D.3.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2599/FDIS 86A/2617/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 60793 series, published under the general title Optical fibres 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.
IEC 60793-2-60:2025 © IEC 2025
1 Scope
This part of IEC 60793 is applicable to optical fibre types C1, C2, C3, and C4, as described in
Table 1. These fibres are used for the interconnections within or between optical components
systems and are optimized to support dense optical connectivity. While the fibres can be
overcoated or buffered for the purpose of making protected pigtails, they can be used without
overcoating. They can, however, be colour coded.
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 60793-1-20, Optical fibres - Part 1-20: Measurement methods and test procedures - Fibre
geometry
IEC 60793-1-21, Optical fibres - Part 1-21: Measurement methods and test procedures -
Coating geometry
IEC 60793-1-22, Optical fibres - Part 1-22: Measurement methods and test procedures - Length
measurement
IEC 60793-1-30, Optical fibres - Part 1-30: Measurement methods and test procedures - Fibre
proof test
IEC 60793-1-31, Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile
strength
IEC 60793-1-32, Optical fibres - Part 1-32: Measurement methods and test procedures -
Coating strippability
IEC 60793-1-33, Optical fibres - Part 1-33: Measurement methods and test procedures - Stress
corrosion susceptibility
IEC 60793-1-40, Optical fibres - Part 1-40: Attenuation measurement methods
IEC 60793-1-44, Optical fibres - Part 1-44: Measurement methods and test procedures - Cut-
off wavelength
IEC 60793-1-45, Optical fibres - Part 1-45: Measurement methods and test procedures - Mode
field diameter
...