IEC 60794-2-10:2023

IEC 60794-2-10 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-10: Indoor optical fibre cables – Family specification for simplex and
duplex cables
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IEC 60794-2-10 ®
Edition 3.0 2023-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-10: Indoor optical fibre cables – Family specification for simplex and
duplex cables
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-6646-5

– 2 – IEC 60794-2-10:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Construction . 7
4.1 General . 7
4.2 Optical fibres and primary coating . 7
4.3 Buffer . 8
4.4 Ruggedised fibre . 8
4.5 Slotted core . 8
4.6 Tube . 8
4.7 Stranded loose tube . 8
4.8 Ribbon structure . 8
4.9 Strength and anti-buckling members . 8
4.10 Ripcord . 9
4.11 Sheath . 9
4.12 Sheath marking . 9
4.13 Identification . 9
4.14 Examples of typical cable constructions designs . 9
5 Dimensions – Optical fibres and primary coating . 9
6 Tests . 9
6.1 General . 9
6.2 Dimensions . 10
6.3 Mechanical requirements . 10
6.3.1 General . 10
6.3.2 Tensile performance . 10
6.3.3 Crush . 10
6.3.4 Impact . 11
6.3.5 Bend . 11
6.3.6 Repeated bending . 11
6.3.7 Bending under tension . 11
6.3.8 Bending at low temperature . 11
6.3.9 Flexing . 11
6.3.10 Torsion . 11
6.3.11 Kink . 11
6.4 Environmental requirements – Temperature cycling . 12
6.5 Transmission requirements . 13
6.5.1 General . 13
6.5.2 Single-mode optical fibres . 13
6.5.3 Single-mode dispersion unshifted (B1.1B-652.B) optical fibre . 13
6.5.4 Single-mode dispersion unshifted (B1.3B-652.D) optical fibre . 13
6.5.5 Single-mode (B6_aB-657.A) optical fibre . 14
6.5.6 Single-mode (B6_bB-657.B) optical fibre . 14
6.5.7 Multimode optical fibres . 14
6.5.8 Multimode (A1a and A1bA1-OM1 to A1-OM5) optical fibres . 14
6.6 Fire performance . 15

Annex A (informative) Examples of some types typical of cable construction designs . 16
Annex B (informative) Family specification of indoor cables – Simplex and duplex
cables . 20
B.1 Blank detail specification . 20
B.1.1 Cable description . 20
B.1.2 Cable elements . 21
B.1.3 Cable construction . 21
B.1.4 Installation and operating conditions . 22
B.1.5 Mechanical, environmental and fire performance tests . 22
B.2 Additional requirements for cables subject to the MICE environmental
classification (ISO/IEC 24702 ISO/IEC 11801-1 and related standards) . 23
Bibliography . 24

Figure A.1 – Simplex loose non-buffered fibre cable . 16
Figure A.2 – Simplex ruggedised fibre cable . 16
Figure A.3 – Duplex loose non-buffered fibre cable . 17
Figure A.4 – Duplex ruggedised fibre cable . 17
Figure A.5 – Duplex ruggedised fibre zip cord . 17
Figure A.6 – Duplex flat cable . 18
Figure A.7 – Duplex round cable . 18
Figure A.8 – Simplex and duplex rectangular cables . 19

Table 1 – Dimensions of buffered fibres . 8
Table 2 – Temperature cycling conditions .
Table 2 – Method: IEC 60794-1-22, F1 . 12
Table 3 – Common single-mode optical fibre requirements . 13
Table 4 – Cabled fibre attenuation requirements for B1.1 B-652.B optical fibre . 13
Table 5 – Cabled fibre attenuation requirements for B1.3 B-652.D optical fibre . 13
Table 6 – Cabled fibre attenuation requirements for B6_a B-657.A optical fibre . 14
Table 7 – Cabled fibre attenuation requirements for B6_b B-657.B optical fibre . 14
Table 8 – Common multimode optical fibre requirements . 14
Table 9 – Cabled fibre attenuation requirements for A1a and A1b A1-OM1 to A1-OM5
optical fibres . 14
Table B.1 – Cable description . 20
Table B.2 – Cable elements . 21
Table B.3 – Cable construction . 21
Table B.4 – Installation and operating conditions . 22
Table B.5 – Tests applicable . 22

– 4 – IEC 60794-2-10:2023 RLV © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-10: Indoor optical fibre cables –
Family specification for simplex and duplex cables

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
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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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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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
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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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60794-2-10:2011. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 60794-2-10 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 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) updating of normative references;
b) updating of all relevant A1 and B1 fibre category and sub-category designations.
This International Standard is to be used in conjunction with IEC 60794‑1‑1:2022,
IEC 60794‑1‑2:2021, IEC 60794‑1‑21:2015 and IEC 60794‑1‑21:2015/AMD1:2020,
IEC 60794‑1‑22:2017, IEC 60794‑1‑23:2019 and IEC 60794‑2:2017.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2277/FDIS 86A/2311/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 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 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.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.

– 6 – IEC 60794-2-10:2023 RLV © IEC 2023
OPTICAL FIBRE CABLES –
Part 2-10: Indoor optical fibre cables –
Family specification for simplex and duplex cables

1 Scope
This part of IEC 60794 is a family specification that covers simplex and duplex optical fibre
cables for indoor use except for cables used in terminated assemblies specified by IEC 60794-
2-50. The requirements of IEC 60794-2 are applicable to cables covered by this document.
For cables intended for installation in industrial applications specified in ISO/IEC
24702 ISO/IEC 11801-1, MICE specifications may can be additionally required (see Clause
B.2).
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.
NOTE 1 They complete the normative references already listed in the generic specification (IEC 60794-1-1, Clause
2, and IEC 60794-1-2, Clause 2).
IEC 60304, Standard colours for insulation for low-frequency cables and wires
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 60793-1-40, Optical fibres – Part 1-40: Attenuation measurement methods and test
procedures – Attenuation
IEC 60793-1-44, Optical fibres – Part 1-44: Measurement methods and test procedures – Cut-
off wavelength
IEC 60793-2, Optical fibres – Part 2: Product specifications – General
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: Product specifications – Sectional specification for
class B single-mode fibres
IEC 60794-1-1:20082022, Optical fibre cables – Part 1-1: Generic specification – General
IEC 60794-1-2:2007, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable
test procedures – General guidance

IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable
test procedures – Mechanical tests methods
IEC 60794-1-22, 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 element test methods
IEC 60794-2:2017, Optical fibre cables – Part 2: Indoor cables – Sectional specification
IEC 60811-1-1, Common test methods for insulating and sheathing materials of electric cables
– Part 1-1: Methods for general application – Measurement of thickness and overall dimensions
– Tests for determining the mechanical properties
NOTE 2 IEC 60811-1-1 is under revision to be replaced by IEC 60811-201, IEC 60811-202 and IEC 60811-203.
IEC 60811-201, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 201: General tests – Measurement of insulation thickness
IEC 60811-203, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 203: General tests – Measurement of overall dimensions
3 Terms and definitions
No terms and definitions are listed in this document.
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 Construction
4.1 General
In addition to the constructional requirements in IEC 60794-2, the following apply to simplex
and duplex indoor cables.
The cable shall be designed and manufactured for an expected operating lifetime of at least 15
years. In this context, the attenuation of the installed cable at the operational wavelength(s)
shall not exceed the values agreed between the customer and the supplier. The materials in
the cable shall not present a health or environmental hazard within its intended use.
There shall be no fibre splice in a delivery length unless otherwise agreed between the customer
and the supplier.
It shall be possible to identify each individual fibre throughout the length of the cable.
4.2 Optical fibres and primary coating
Multimode or single-mode optical fibres shall be used which meet the requirements of
IEC 60793-2.
– 8 – IEC 60794-2-10:2023 RLV © IEC 2023
4.3 Buffer
If a buffer is required, it shall consist of one or more layers of inert material. The buffer shall be
easily removable. For tight buffers, the buffer and fibre primary coating shall be removable in
one operation over a minimum length of 10 mm to 25 mm 15 mm, depending on customer
requirements. For semi-tight buffers, the buffer shall be easily removable over a minimum length
of 0,3 m to 0,5 m 300 mm. For loose buffers, the buffer shall be easily removable over a length
of not less than 1,0 m.
Buffer dimensions are shown in Table 1.
Table 1 – Dimensions of buffered fibres
Buffer type Nominal diameter Tolerances
mm mm
Semi-tight or loose buffer 0,3 to 1,3
± 0,05
Tight buffer 0,3 to 1,0
± 0,05
4.4 Ruggedised fibre
Further protection can be provided to buffered fibres by surrounding one or two of the fibres
with non-metallic strength members within a sheath of suitable polymeric material.
4.5 Slotted core
Cables of this construction are not commonly used.
4.6 Tube
One or two primary coated or buffered fibres are packaged (loosely or not) in a tube construction
which may be filled. The tube may be reinforced with a composite wall.
The polymeric tube may be hard, in order to provide crush protection to the fibre bundle, or soft
to enable easy strippability of the tube without the use of specialized tools.
If required the suitability of the tube shall be determined by an evaluation of its kink resistance
in accordance with IEC 60794-1-2 IEC 60794-1-23, Method G7.
4.7 Stranded loose tube
Cables of this construction are not commonly used, however two general designs can be
employed:
a) loose tubes laid in parallel;
b) a number of homogeneous loose tubes stranded helically or with the reverse-oscillating (SZ)
method
4.8 Ribbon structure
Cables of this construction are not commonly used.
4.9 Strength and anti-buckling members
The cable shall be designed with sufficient strength members to meet installation and service
conditions so that the fibres are not subjected to strain in excess of limits agreed between the
customer and the supplier.
The strength and/or, anti-buckling member or both may be either metallic or non-metallic and
may be located in the cable core and/or under the sheath and/, or in the sheath.
4.10 Ripcord
Ripcords are not commonly used.
4.11 Sheath
The cable shall have an overall protective sheath. The cable diameter dimension(s) shall be
specified in the relevant detail specification (or product specification).
4.12 Sheath marking
If required, the cable shall be marked according to the local regulations or the agreement
between the customer and the supplier.
Local regulations for sheath marking can apply. In the absence of local regulations, there can
be an agreement between the customer and supplier.
4.13 Identification
In case of duplex cables, the cable design should enable clear polarity identification for each
individual fibre. When fibre colouring is used for identification, standard colours shall be used
as closely as possible (reasonable match) to IEC 60304.
4.14 Examples of typical cable constructions designs
Examples of some main types of typical cable construction designs are shown in Annex A. Other
configurations are not excluded if they meet the mechanical, environmental and transmission
requirements given in this document.
5 Dimensions – Optical fibres and primary coating
The dimensions of the individual primary coated fibres in the finished product shall be in
accordance with one of the sectional specifications defined in IEC 60793-2 series. The fibre
dimensions (e.g. cladding diameter or outer diameter including colouring) shall be verified in
accordance with IEC 60793-1-20 for fibre geometry or IEC 60793-1-21 for coating geometry.
Cable and cable element dimensions shall be measured in accordance with IEC 60794-1-1. For
dimensions of buffers see Table 2.
6 Tests
6.1 General
Compliance with the specification requirements shall be verified by carrying out tests selected
from the 6.2 to 6.5. It is not intended that all tests shall be carried out; the frequency of testing
shall be agreed between the customer and supplier.
Unless otherwise specified, all tests shall be carried out at ambient temperature standard
atmospheric conditions in accordance with IEC 60794-1-2.
These tests are not intended to define end-of-life performance.
See Annex B for a blank detail specification.

– 10 – IEC 60794-2-10:2023 RLV © IEC 2023
6.2 Dimensions
The fibre dimensions and tolerances shall be checked in accordance with the test method as
specified in IEC 60793-1-20 for fibre geometry or IEC 60793-1-21 for coating geometry. The
diameter of the buffer and of the cable, as well as the thickness of the sheath, shall be measured
in accordance with the methods of IEC 60811-1-1 IEC 60811-201 for insulation thickness and
IEC 60811-203 for overall dimensions.
6.3 Mechanical requirements
6.3.1 General
Some of the following tests can be performed on a short sample length of cable which is still an
integral part of a longer length. Thus it becomes possible to detect permanent changes in
attenuation. The maximum value of this attenuation change shall be agreed between the
customer and supplier.
6.3.2 Tensile performance
Method: IEC 60794-1-21, E1
Diameter of chuck drums and
transfer devices: not less than 250 mm
Rate of transfer device: either 100 mm/min or 100 N/min
Load: T = 75 N applied for 10 min for simplex cables and normal
M
duplex cables
T = 150 N applied for 10 min for duplex cables which
M
consist of independent simplex cables (see NOTE 1)
NOTE 1 In case of duplex cables that include two simplex cables and bearing the applied tensile force by the
strength members of each simplex cable, as shown in Figure A.5 Figure A.6 (without the optional strength member)
and Figure A.7, the tensile requirement for the duplex cable shall will be double that for the simplex cable. The
rationale is that those simplex cables may can be taken out from the duplex cable and will be independently used.
NOTE 2 The requirements of tensile load depend on the construction of cables. Lower values may can be adopted
for some types of cables, for example small factor simplex cables.
Length of sample: sufficient to achieve the desired accuracy of measurement
of attenuation change and shall be agreed between
customer and supplier
no less than 50 m unless specified in the relevant
specification. For cables requiring specialized anchoring
devices, the minimum length shall be 25 m.
Requirements: no change in attenuation after the test and there shall be no
damage to the cable elements
Fibre strain shall not exceed a value agreed upon between
customer and supplier
for 1 % proof-tested fibres, the fibre strain under short-term
tensile load (T ) the fibre strain shall not exceed 60 % of
M
the fibre proof strain and the attenuation change during test
shall be measured and recorded. Other criteria may be
agreed between the customer and the supplier. Under
visual examination without magnification, there shall be no
damage to the sheath or to the cable elements.
6.3.3 Crush
Method: IEC 60794-1-2, E3 IEC 60794-1-21, E3A
Force (short term): 500 N
Duration: 1 min
Length between test locations: 500 mm
Requirements: no change in attenuation after the test and there shall be
no damage to the cable elements
NOTE In the case of flat cables the force is applied on the flat sides of the cable.
6.3.4 Impact
Method: IEC 60794-1-2, E4 IEC 60794-1-21, E4
Radius of striking surface: 12,5 mm
Impact energy: 1,0 J
Number of impacts: at least 3, each separated by at least 500 mm
Requirements: no fibre breakage
NOTE In the case of flat cables the force is applied on the flat sides of the cable.
6.3.5 Bend
Method: IEC 60794-1-2, E11A IEC 60794-1-21, E11A
Mandrel diameter: 60 mm
Number of turns: 6
Number of cycles: 10
Requirements: no fibre breakage
NOTE In the case of flat cables the force is applied on the flat sides of the cable.
6.3.6 Repeated bending
None.
6.3.7 Bending under tension
None.
6.3.8 Bending at low temperature
None.
6.3.9 Flexing
None.
6.3.10 Torsion
Method: IEC 60794-1-2, E7 IEC 60794-1-21, E7
Number of cycles: 3 10
Distance between 125 x cable diameter but no less than 0,3 m and not more
fixed and rotating clamp: than 1 m

Tension load: 20 N
Requirements: no fibre breakage
6.3.11 Kink
Method: IEC 60794-1-2, E10 IEC 60794-1-21, E10
Minimum loop diameter: 20 times cable diameter
Requirement: no kink shall occur

– 12 – IEC 60794-2-10:2023 RLV © IEC 2023
6.4 Environmental requirements – Temperature cycling
5.4.1 Temperature cycling
See Table 2.
Method: IEC 60794-1-2, F1
Table 2 – Temperature cycling conditions
Low temperature High temperature
T T
A B
a) 0 °C +50 °C
b) –5 °C +50 °C
c) –20 °C +60 °C
d) –45 °C +60 °C
NOTE Condition a), b), c) or d) will be selected depending on
application and customer requirements, for example condition c)
is appropriate for applications to ISO/IEC 11801.

For indoor simplex and duplex cables, -10 °C and +60 °C are the recommended low and high
temperatures. Based on different environment classifications, other operating temperatures can
be agreed upon between customer and supplier. Table 2 gives the operating temperature limits
based on environmental classification.
Table 2 – Method: IEC 60794-1-22, F1
Low temperature High temperature Sources of temperature limits
T T
A2 B2
Performance categories Environmental classification

of connectors, components of customer premises
a b
and protective housings cabling
°C °C
-10 +60 C (recommended) M I C E
x x 1 x
-25 +70 OP M I C E
x x 2 x
-40 +70 I M I C E
x x 3 x
A suitable operating service environment (performance category) or environmental classification should be
selected in accordance with the application. A complete list of operating service environments can be found in
IEC 60794-1-1.
a
Included in IEC 61753-1. The abbreviated terms stand for:
C: indoor controlled environment;
OP: outdoor protected environment;
I: industrial environment;
b
Included in ISO/IEC 11801-1. For an introduction to the MICE environmental classification system use
ISO/IEC TR 29106. The abbreviation MICE stands for: mechanical, ingress, climatic, electromagnetic.

Period t : sufficient so that the cable has reached, and stabilised to,
the specified temperature
Number of cycles: 2
Length of sample: sufficient to achieve the desired accuracy of measurement
of attenuation
Requirement: maximum increase in attenuation to be agreed between
customer and supplier
6.5 Transmission requirements
6.5.1 General
The transmission requirements shall be in accordance with one of the sectional specifications
defined in the IEC 60793-2 series and shall be agreed between the customer and supplier. The
maximum cabled fibre attenuation shall comply with this specification.
NOTE 1 625 nm performance is optional depending on agreement between customer and supplier.
6.5.2 Single-mode optical fibres
See Table 3.
Table 3 – Common single-mode optical fibre requirements
Characteristics IEC 60794‑2:2017, Requirements Test methods Remarks
subclause No.
Uncabled optical fibre 4.2 IEC 60793-2-50
Cabled fibre cut-off
λ < λ operational
4.2 IEC 60793-1-44
cc
wavelength
Attenuation Point
4.2 ≤ 0,10 dB IEC 60793-1-40
discontinuities at 1 550 nm
6.5.3 Single-mode dispersion unshifted (B1.1B-652.B) optical fibre
See Table 4.
Table 4 – Cabled fibre attenuation requirements for B1.1 B-652.B optical fibre
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Attenuation coefficient
7.3 Acc. DS IEC 60793-1-40
(cabled fibres)
at 1 310 nm  ≤ 1,0 dB/km
at 1 550 nm ≤ 1,0 dB/km
at 1 625 nm ≤ 1,0 dB/km
6.5.4 Single-mode dispersion unshifted (B1.3B-652.D) optical fibre
See Table 5.
Table 5 – Cabled fibre attenuation requirements for B1.3 B-652.D optical fibre
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Attenuation coefficient
7.3 Acc. DS IEC 60793-1-40
(cabled fibres)
at 1 310 nm to 1 625 nm  ≤ 1,0 dB/km
at 1 383 nm ≤ 1,0 dB/km
at 1 550 nm ≤ 1,0 dB/km
– 14 – IEC 60794-2-10:2023 RLV © IEC 2023
6.5.5 Single-mode (B6_aB-657.A) optical fibre
See Table 6.
Table 6 – Cabled fibre attenuation requirements for B6_a B-657.A optical fibre
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Attenuation coefficient
7.3 Acc. DS IEC 60793-1-40
(cabled fibres)
at 1 310 nm to 1 625 nm ≤ 1,0 dB/km
at 1 383 nm ≤ 1,0 dB/km
at 1 550 nm ≤ 1,0 dB/km
6.5.6 Single-mode (B6_bB-657.B) optical fibre
See Table 7.
Table 7 – Cabled fibre attenuation requirements for B6_b B-657.B optical fibre
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Attenuation coefficient
7.3 Acc. DS IEC 60793-1-40
(cabled fibres)
at 1 310 nm ≤ 1,0 dB/km
at 1 550 nm ≤ 1,0 dB/km
at 1 625 nm ≤ 1,0 dB/km
6.5.7 Multimode optical fibres
See Table 8.
Table 8 – Common multimode optical fibre requirements
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Uncabled optical fibre 4.2 IEC 60793-2-10
Attenuation Point
discontinuities 4.2 ≤ 0,10 dB IEC 60793-1-40
at 850 nm and 1 300 nm
6.5.8 Multimode (A1a and A1bA1-OM1 to A1-OM5) optical fibres
See Table 9.
Table 9 – Cabled fibre attenuation requirements for A1a and A1b A1-OM1 to A1-OM5
optical fibres
Characteristics IEC 60794-2:2017, Requirements Test methods Remarks
subclause No.
Attenuation coefficient
7.3 Acc. DS IEC 60793-1-40
(cabled fibres)
at 850 nm 3,5 3,0 dB/km
at 1 300 nm 1,5 dB/km
6.6 Fire performance
IEC TR 62222 provides guidance and recommendations for the requirements and test methods
for the fire performance of communication cables when installed in buildings. The
recommendations relate to typical applications and installation practices, and an assessment
of the fire hazards presented. Account is also taken of applicable legislation and regulation.
IEC TR 62222 references several IEC fire performance test methods and also other test
methods that may can be required by local or national legislation and regulation. The tests to
be applied, and the requirements, shall be agreed between the customer and supplier taking
into account the fire hazard presented by the end use application in which the cable is intended
to be used.
– 16 – IEC 60794-2-10:2023 RLV © IEC 2023
Annex A
(informative)
Examples of some types typical
of cable construction designs
See Figure A.1 to Figure A.8 for examples of types of typical cable construction designs.
The main dimension(s) shall be agreed between the customer and supplier.

Figure A.1 – Simplex loose non-buffered fibre cable

Figure A.2 – Simplex ruggedised fibre cable

Figure A.3 – Duplex loose non-buffered fibre cable

Figure A.4 – Duplex ruggedised fibre cable

Figure A.5 – Duplex ruggedised fibre zip cord

– 18 – IEC 60794-2-10:2023 RLV © IEC 2023

Figure A.6 – Duplex flat cable

Figure A.7 – Duplex round cable

Figure A.8 – Simplex and duplex rectangular cables

– 20 – IEC 60794-2-10:2023 RLV © IEC 2023
Annex B
(informative)
Family specification of indoor cables –
Simplex and duplex cables
B.1 Blank detail specification
B.1.1 Cable description
See Table B.1 for cable description.
Table B.1 – Cable description
(1) Prepared by (2) Document No :
Issue :
Date :
(3) Available from: (4) Generic specification : IEC 60794-1-1
Sectional specification : IEC 60794-2
(5) Additional references: ISO/IEC 24702 ISO/IEC 11801-1 if required
(6) Cable description:
(7) Cable construction:
Optical fibres
Range of fibre count
Modularity
Construction Additional remarks
– Optical fibres and primary coating
– Strength and anti-buckling members
Outer sheath
– Material
– Min. wall thickness
Sheath marking
– Customer requirement
– Identification of manufacturer
Fibre identification
– Customer requirement
(8) Application information:
Application (indoor)
Maximum outer diameter (d) or width and height mm
Rated maximum tensile load N
Minimum bending radius for operation mm or n x o.d.
Temperature range:
– Transport and storage
°C
– Installation °C
– Operation °C
Manufacturing cable length
– Typical m
– Nominal/tolerances: -0 % / +1 %

B.1.2 Cable elements
See Table B.2 for cable elements.
Table B.2 – Cable elements
Characteristics (9) IEC 60794- Family Test methods Remarks (13)
2:2017, requirements (11) (12)
subclause
No.(10)
Optical fibres and primary 4.1 Acc. DS
coating
Buffer 5.2 Acc. DS Visual inspection
Strength and anti-buckling 5.7 Acc. DS Visual inspection
member
B.1.3 Cable construction
See Table B.3 for cable construction.
Table B.3 – Cable construction
Characteristics (9) IEC 60794- Family Test methods (12) Remarks (13)
2:2017, requirements (11)
subclause No.
(10)
Cable core Acc. DS Visual inspection
Strength member 5.7 Acc. DS Visual inspection
– Longitudinal
– Helical
– Embedded in the
sheath
Sheath 5.11
– Material Acc. DS
– Minimum sheath Acc. DS IEC 60811-1-1 IEC
thickness 60811-202
– Width and height Acc. DS IEC 60811-1-1 IEC
60811-202
– Optional protection Acc. DS
– Abrasion resistance Acc. DS IEC 60794-1-2 IEC
60794-1-21
Method E2A
Sheath marking 5.12
– Configuration, Acc. DS Visual inspection
dimensions
– Abrasion resistance Acc. DS IEC 60794-1-2 IEC Steel needle diameter d
60794-1-21 = 1,0 mm
Method E2B load: 4 N
Cable length
– 22 – IEC 60794-2-10:2023 RLV © IEC 2023
B.1.4 Installation and operating conditions
See Table B.4 for installation and operating conditions.
Table B.4 – Installation and operating conditions
Characteristics (9) IEC 60794- Family Test methods (12) Remarks (13)
2:2017, requirements (11)
subclause No.
(10)
General requirements
Bend of cable element 7.2 Acc. DS IEC 60794-1-2 IEC
60794-1-23
Method G1
B.1.5 Mechanical, environmental and fire performance tests
See Table B.5 for mechanical, environmental and fire performance tests.
Table B.5 – Tests applicable
Characteristics (9) IEC 60794- Family Test Methods (12) Remarks (13)
2:2017, requirements (11)
sublause No.
(10)
Tensile performance 7.3 See 6.3.2 IEC 60794-1-2 IEC
60794-1-21
Method E1A
Crush 7.3 See 6.3.3 IEC 60794-1-2 IEC
60794-1-21
Method E3
Impact 7.3 See 6.3.4 IEC 60794-1-2 IEC
60794-1-21
Method E4
Bending 7.3 See 6.3.5 IEC 60794-1-2 IEC
60794-1-21
Method E11A
Repeated bending 7.3 See 6.3.6 IEC 60794-1-2 IEC
60794-1-21
Method E6
Bending at low 7.3 See 6.3.8 IEC 60794-1-2 IEC
temperature 60794-1-21
Method E11A
Flexing 7.3 See 6.3.9 IEC 60794-1-2 IEC
60794-1-21
Method E8
Torsion 7.3 See 6.3.10 IEC 60794-1-2 IEC
60794-1-21
Method E7
Kink 7.3 See 6.3.11 IEC 60794-1-2 IEC
60794-1-21
Method E10
Sheath shrinkage 7.3 IEC 60794-1-22
Method F11
Temperature cycling 7.3 See 6.4 IEC 60794-1-2 IEC
60794-1-22
Method F1
Fire performance 7.4 See 6.6 IEC TR 62222

B.2 Additional requirements for cables subject to the MICE environmental
classification (ISO/IEC 24702 ISO/IEC 11801-1 and related standards)
Cables intended for installation in conformity with ISO/IEC 24702 ISO/IEC 11801-1 and related
standards may can require the specification of additional tests to ensure their suitability in the
applicable environments defined by the mechanical, ingress, climatic and chemical, andor
electromechanical (MICE) classification. Such tests ar
...