IEC 60794-2-30:2019

Optical fibre cables - Part 2-30: Indoor cables - Family specification for optical fibre ribbon cables for use in terminated cable assemblies

IEC 60794-2-30:2019 is a family specification which covers indoor optical fibre ribbon cables for use in terminated cable assemblies. The requirements of the sectional specification IEC 60794-2 are applicable to cables covered by this document. The requirements of this document are written to define flat ribbon cables. This document can be applicable to other cable constructions. Parts of IEC 60794-3 which are applicable for ribbon tests are the subject of IEC 60794-1-31. Annex B contains requirements that supersede the normal requirements in case the cables are intended to be used in installation governed by the MICE table of ISO 11801-3.This third edition cancels and replaces the second 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) removal of Annex C;
b) reference to the most recent fibre standards;
c) reference to IEC 60794-1-21, IEC 60794-1-22, IEC 60794-1-23 and IEC 60794-1-24.
This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and
IEC 60794-2.
Keywords: indoor optical fibre ribbon cables, flat ribbon cables

Câbles à fibres optiques - Partie 2-30: Câbles intérieurs - Spécification de famille pour les câbles à rubans de fibres optiques utilisés dans les assemblages de câbles connectorisés

IEC 60794-2-30:2019 est une spécification de famille qui couvre les câbles à rubans de fibres optiques intérieurs pour usage dans les assemblages de câbles connectorisés. Les exigences de la spécification intermédiaire IEC 60794-2 sont applicables aux câbles couverts par le présent document. Les exigences présent document sont écrites pour définir un câble à ruban plat. Le présent document peut être applicable à d’autres constructions de câbles. Les parties de l’IEC 60794-3 qui sont applicables pour les essais de rubans constituent le sujet de l’IEC 60794-1-31. L’Annexe B contient des exigences qui remplacent les exigences normales dans le cas où les câbles sont destinés à être utilisés dans une installation régie par le tableau MICE de l’ISO 11801-3. Cette troisième édition annule et remplace la deuxième édition parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) retrait de l’Annexe C;
b) référence aux normes les plus récentes relatives aux fibres;
c) référence à l'IEC 60794-1-21, l'IEC 60794-1-22, l'IEC 60794-1-23 et l'IEC 60794-1-24.
La présente norme doit être utilisée conjointement avec l’IEC 60794-1-1, l’IEC 60794-1-2 et l’IEC 60794-2.
Mots-clés: câbles à rubans de fibres optiques intérieurs, câble à ruban plat

General Information

• Status: Published
• Publication Date: 17-Mar-2019
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Current Stage: PPUB - Publication issued
• Start Date: 18-Mar-2019
• Completion Date: 04-Mar-2019

Relations

• Revises: IEC 60794-2-30:2008 - Optical fibre cables - Part 2-30: Indoor cables - Family specification for ribbon cables
• Effective Date: 05-Sep-2023

Overview

IEC 60794-2-30:2019 is an IEC family specification for indoor optical fibre ribbon cables intended for use in terminated cable assemblies. Focused on defining flat ribbon cables, this third edition (replacing the 2008 edition) provides construction, dimension, performance and test requirements specific to ribbon-style indoor cabling used in premises and data‑centre environments. Annex B adds alternative requirements where cables are installed under the MICE environmental classification.

Key topics and technical requirements

The standard addresses the full ribbon-cable lifecycle from design to verification, including:

• Construction and materials
  • Ribbon structure, optical fibres and primary coating, buffers, sheath, ripcord, strength/anti‑buckling members and identification/colour coding.
• Dimensions and geometry
  • Defined ribbon and cable geometry for flat ribbon constructions and related dimension limits.
• Mechanical tests
  • Cable tensile performance, crush, impact, bending (including repeated and bending under tension), flexing, torsion and kink tests.
• Environmental tests
  • Temperature cycling and related environmental requirements; Annex B provides alternative conditions for MICE-classified installations.
• Transmission requirements
  • Cabled attenuation and transmission limits for multiple single-mode and multimode fiber categories (tables in the standard define applicable values).
• Fire performance
  • Fire behaviour and marking requirements relevant to indoor deployment and terminated assemblies.
• Documentation and family specification
  • Blank detail specification templates in Annex B for family-based product definition (enables product variants under a single family spec).

Notable editorial/technical updates in this edition: removal of Annex C, references updated to the most recent fibre standards, and added cross-references to IEC 60794-1-21/1-22/1-23/1-24.

Practical applications and users

IEC 60794-2-30:2019 is used by:

• Cable manufacturers designing and certifying indoor flat ribbon cables for patch cords, trunking and terminated assemblies.
• System designers and specifiers selecting ribbon cables for premises cabling, data centres, central offices and telecom rooms.
• Installers and contractors ensuring installed ribbon cables meet mechanical, environmental and fire requirements for indoor spaces.
• Test laboratories and conformity bodies performing the mechanical, environmental and transmission tests described. Practical use cases include high-density backbone/trunk cabling, MPO/MTP terminated assemblies, and horizontal/cross‑connect installations where rapid mass-fibre termination is required.

Related standards

• IEC 60794-2 (sectional specification for indoor cables)
• IEC 60794-1-1, IEC 60794-1-2 (general test methods)
• IEC 60794-1-21, -1-22, -1-23, -1-24 (additional test references)
• ISO/IEC standards referenced for MICE environmental classifications (installation guidance)

Keywords: IEC 60794-2-30:2019, indoor optical fibre ribbon cables, flat ribbon cables, terminated cable assemblies, ribbon cable tests, MICE, premises cabling.

Standards Content (Sample)

IEC 60794-2-30 ®
Edition 3.0 2019-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-30: Indoor cables – Family specification for optical fibre ribbon cables for
use in terminated cable assemblies

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IEC 60794-2-30 ®
Edition 3.0 2019-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibre cables –
Part 2-30: Indoor cables – Family specification for optical fibre ribbon cables for

use in terminated cable assemblies

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-6684-7

– 2 – IEC 60794-2-30:2019 RLV © IEC 2019
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 . 8
4.3 Buffer . 8
4.4 Ruggedized 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 . 8
4.11 Sheath . 8
4.12 Sheath marking . 9
4.13 Identification . 9
4.14 Example of cable construction . 9
5 Dimensions. 9
5.1 Optical fibres and primary coating . 9
5.2 Ribbon structural geometry . 10
5.3 Optical fibre ribbon cable . 10
6 Tests . 10
6.1 General . 10
6.2 Dimensions . 10
6.3 Mechanical requirements . 11
6.3.1 Cable tensile performance . 11
6.3.2 Cable crush . 11
6.3.3 Cable impact . 11
6.3.4 Cable bending . 11
6.3.5 Cable repeated bending . 11
6.3.6 Cable bending under tension . 12
6.3.7 Cable bending at low temperature . 12
6.3.8 Cable flexing . 12
6.3.9 Cable torsion . 12
6.3.10 Cable kink . 12
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 optical fibre (B1.1) . 13
6.5.4 Single-mode dispersion unshifted optical fibre (B1.2) . 14
6.5.5 Single-mode dispersion unshifted optical fibre (B1.3) . 14
6.5.6 Single-mode dispersion shifted optical fibre (B2) . 14
6.5.7 Single-mode non-zero dispersion optical fibre (B4) . 14

6.5.8 Single-mode wide band non-zero dispersion optical fibre (B5) . 15
6.5.9 Single-mode bending loss insensitive optical fibre (B6) . 15
6.5.10 Multimode fibres . 15
6.6 Fire performance . 15
Annex A (informative) Example of cable construction . 17
Annex B (informative) Family specification indoor cables – Optical fibre ribbon cables . 18
B.1 Blank detail specification . 18
B.1.1 Cable description . 18
B.1.2 Cable element . 19
B.1.3 Cable construction . 19
B.1.4 Installation and operating conditions . 20
B.1.5 Mechanical, environmental and fire performance tests . 20
B.2 Additional requirements for Cables subject to the MICE environmental
classification (ISO/IEC 24702 ISO 11801-3 and related standards) . 21
Bibliography . 24

Figure 1 – Example of identification by means of colour coding and positioning . 9
Figure A.1 – Example of cross-section of a four-fibre ribbon cable . 17

Table – Specifications for Industrial Premises installations as defined in
ISO/IEC 24702 .
Table 1 – Dimensions of optical fibre ribbon cables . 10
Table 2 – Temperature cycling conditions . 13
Table 3 – Common single-mode fibre requirements . 13
Table 4 – Cabled attenuation requirements for B1.1 optical fibre . 13
Table 5 – Cabled attenuation requirements for B1.2 optical fibre . 14
Table 6 – Cabled attenuation requirements for B1.3 optical fibre . 14
Table 7 – Cabled attenuation requirements for B2 optical fibre . 14
Table 8 – Cabled attenuation requirements for B4 optical fibre . 14
Table 9 – Cabled attenuation requirements for B5 optical fibre . 15
Table 10 – Cabled attenuation requirements for B6 optical fibre . 15
Table 11 – Requirements for multimode optical fibre (A1a and A1b) . 15
Table B.1 – Cable description . 18
Table B.2 – Cable element . 19
Table B.3 – Cable construction . 19
Table B.4 – Installation and operating conditions . 20
Table B.5 – Tests applicable . 21

– 4 – IEC 60794-2-30:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-30: Indoor cables –
Family specification for optical fibre ribbon
cables for use in terminated cable assemblies

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
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This redline version of the official IEC Standard allows the user to identify the changes
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International Standard IEC 60794-2-30 has been prepared by sub-committee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second 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) removal of Annex C;
b) reference to the most recent fibre standards;
c) reference to IEC 60794-1-21, IEC 60794-1-22, IEC 60794-1-23 and IEC 60794-1-24.
This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and
IEC 60794-2.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1704/CDV 86A/1808/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "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.
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.
– 6 – IEC 60794-2-30:2019 RLV © IEC 2019
OPTICAL FIBRE CABLES –
Part 2-30: Indoor cables –
Family specification for optical fibre ribbon
cables for use in terminated cable assemblies

1 Scope
This part of IEC 60794 is a family specification which covers indoor optical fibre ribbon cables
. The requirements of the sectional specification
for indoor use in terminated cable assemblies
IEC 60794-2 are applicable to cables covered by this document.
The requirements of this document are written to define flat ribbon cables. This document can
be applicable to other cable constructions. Parts of IEC 60794-3 which are applicable for
ribbon tests are the subject of IEC 60794-1-31.
Annex B contains requirements that supersede the normal requirements in case the cables
are intended to be used in installations governed by the MICE table of ISO/IEC 24702 11801-
3 [4] .
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 These reference complete the normative references already listed in the generic specifications
(IEC 60794-1-1, Clause 2, and IEC 60794-1-2, Clause 2) or in the sectional specification (IEC 60794-2, Clause 2)).
IEC 60304:1982, 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 60793-1-40, Optical fibres – Part 1-40: 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 specification – Sectional specification for
class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General 86A/1054/NP
__________
Numbers in square brackets refer to the Bibliography.

IEC 60794-1-2, 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 test 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 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification
IEC 60811-1-1:1993, Common test methods for insulating and sheathing materials of electric
cables and optical cables – Part 1-1: Methods for general application –Measurement of
thickness and overall dimensions – Tests for determining the mechanical properties
IEC 60811-1-4:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section Four: Tests at low temperatures.
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 60811-504, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Construction
4.1 General
In addition to the constructional requirements in IEC 60794-2, the following considerations
apply to indoor ribbon cables for use in terminated cable assemblies.
The cable shall be designed and manufactured for a predicted operating lifetime of at least
15 years. In this context, the attenuation of the installed cable at the operational wavelength(s)
shall not exceed values agreed between the customer and the supplier. The materials in the
cable shall not present a health hazard within its intended use.
There shall be no fibre splice in a delivery length unless otherwise agreed by the customer
and the supplier.
– 8 – IEC 60794-2-30:2019 RLV © IEC 2019
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 meeting the requirements of IEC 60793-2 shall be
used.
Category A1 multimode fibres which meet the requirements of IEC 60793-2-10 or categories
B1.1, B1.2, B1.3, B2, B4, B5 and B6 single-mode optical fibres which meet the requirements
of IEC 60793-2-50 shall be used. The linear coefficient of optical fibre attenuation and
attenuation point discontinuity may be affected by the cable manufacturing process. Maximum
values for these optical characteristics shall be agreed between the customer and the supplier.
4.3 Buffer
None.
4.4 Ruggedized fibre
None.
4.5 Slotted core
None.
4.6 Tube
None.
4.7 Stranded loose tube
None.
4.8 Ribbon structure
The ribbon structure shall conform to 6.5 and 8.2.3 of IEC 60794-3. Fibres shall be formed
into units of typically two, four, six, eight, or twelve fibres each. The fibres within the units
shall remain parallel and not cross over. An example of a ribbon construction is shown in
Figure A.1
The ribbon structure shall be in accordance with IEC 60794-3.
4.9 Strength and anti-buckling members
The optical fibre ribbon cable may incorporate a tensile strength member. The strength
member can may be a layer of suitable material, longitudinally or helically applied, and/or may
be embedded in the overall sheath.
4.10 Ripcord
None.
4.11 Sheath
The optical fibre ribbon shall be uniformly covered with a protective sheath generally as
shown in Figure A.1.
4.12 Sheath marking
If required, the cable shall be marked as agreed between the customer and the supplier.
4.13 Identification
The coated fibre shall be distinguishable by means of colour coding and positioning. For
example (see Figure 1):
a) a fibre ribbon has an identification coloured fibre on one side and a sub-identification
coloured one on the other side;
b) the identification and the sub-identification coloured fibres are the first and the last in the
fibre ribbon, respectively;
c) any colour of the identification colours group is different from that of the sub-identification
colours group;
d) the colour types and the order used for identification and sub-identification should be
agreed between the customer and the supplier. The colours of the other fibres shall be
agreed by the customer and/or the supplier;
e) the colour range used is similar to the first 12 colours described in Table 1 of
IEC 60794-2:2002, i.e., blue, yellow, red, white, green, violet, orange, grey, turquoise,
black, brown and pink.
Optical fibre Ribbon coating
1 2 3 n-1 n
• • •
Sub-identification colour code
Identification colour code
IEC
NOTE 1 The identification colour enables each fibre ribbon to be identified individually within a group of ribbons.
NOTE 2 The sub-identification colour shows the ribbon group.
NOTE 3 The identification and the sub-identification colour in a ribbon enables each fibre to be identified
individually within the ribbon.
Figure 1 – Example of identification by means of colour coding and positioning
Other methods of identification are under consideration.
4.14 Example of cable construction
An example of a ribbon cable construction is shown in Figure A.1. Other configurations are
not precluded if they meet the mechanical, environmental and transmission requirements
given in this document.
5 Dimensions
5.1 Optical fibres and primary coating
The dimensions of the individual primary coated fibres in the finished product shall be in
accordance with IEC 60793-2.
– 10 – IEC 60794-2-30:2019 RLV © IEC 2019
5.2 Ribbon structural geometry
The ribbon geometry shall conform to 8.2.3 of be in accordance with IEC 60794-3.
5.3 Optical fibre ribbon cable
The structural geometry of the optical fibre ribbon cables shall be designed so as to comply
with the mechanical, environmental and transmission requirements as defined in this
document. For instance, either rectangular or circular structure can be chosen.
Unless otherwise specified In the case of a rectangular structure, the dimensions and the
structural geometry of optical fibre ribbon cables shall be as shown in Table 1.
Other structures can be applied if agreed between the supplier and the customer.
Table 1 – Dimensions of optical fibre ribbon cables
Number of Optical fibre ribbon cables
fibres
Width Height
mm mm
Nominal Maximum tolerance Nominal Maximum tolerance
2 3,0 to 3,5 ± 0,4 2,3 to 2,7 ± 0,3
4 3,0 to 3,5 2,3 to 2,7
± 0,4 ± 0,3
6 3,5 to 4,0 ± 0,4 2,3 to 2,7 ± 0,3
8 2,5 to 4,5 ± 0,4 0,9 to 3,0 ± 0,3
12 3,5 to 5,5 0,9 to 3,0
± 0,4 ± 0,3
NOTE These dimensions apply to the ribbon cable including the sheath and any strength members.

6 Tests
6.1 General
Compliance with the relevant detail specification requirements shall be verified by carrying out
tests selected from the following subclauses. It is not intended that all the tests shall be
carried out; the tests which are to be performed and the frequency of testing shall be agreed
between the customer and the supplier.
Some of the following tests can be performed on a short sample length of optical fibre ribbon
cable which is still an integral part of a longer length. For testing, the force shall be applied on
the flat sides of the cable. Thus, it becomes possible to detect permanent changes in
attenuation. The wavelength and maximum increase in attenuation change can be agreed
between the customer and the supplier.
6.2 Dimensions
The dimensions and structural geometry of optical fibre ribbon can be verified with a type test
described in 8.2.3 of IEC 60794-3 to establish and assure ensure proper control of the ribbon
manufacturing process. Once the process is established, and in order to ensure functional
performance, the dimensions of ribbons may be controlled and verified, for final inspection
purposes, with a dial gauge as described in Method G4 of IEC 60794-1-2 IEC 60794-1-23.
The size of the optical fibre ribbon cable, width and height, shall be measured in accordance
with the methods of IEC 60811-1-1 IEC 60811-203.

6.3 Mechanical requirements
6.3.1 Cable tensile performance
Method: IEC 60794-1-2-E1A IEC 60794-1-21, E1
Diameter of chuck drums and transfer devices: not lower than the minimum dynamic
bending diameter specified for the cable
Velocity of transfer device: either 100 mm/min or 100 N/min
Load: 200 N applied for 5 min
Length of sample: sufficient to achieve the desired
accuracy of measurement of attenuation
and shall be agreed between the
customer and the supplier.
Requirement: no change in attenuation after the test,
and there shall be no damage to the
cable elements.
6.3.2 Cable crush
Method: IEC 60794-1-2 IEC 60794-1-21, E3
Force: 500 N
Duration: 1 min
Length between test locations: 500 mm
Requirement: no change in attenuation after the test,
and there shall be no damage to the
cable elements.
NOTE The force is applied on the flat sides of the cable.
6.3.3 Cable impact
Method: IEC 60794-1-2 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
Requirement: no fibre breakage
NOTE The force is applied on the flat sides of the cable.
6.3.4 Cable bending
Method: IEC 60794-1-2 IEC 60794-1-21, E11A
Mandrel diameter: 50 mm
Number of turns per helix: 6
Number of cycles: 10
Requirements: no fibre breakage
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.5 Cable repeated bending
Method: IEC 60794-1-2- IEC 60794-1-21, E6
Bending radius: 100 mm
Number of cycles: 300
Mass of weights: 2 kg
Requirement: no fibre breakage

– 12 – IEC 60794-2-30:2019 RLV © IEC 2019
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.6 Cable bending under tension
None.
6.3.7 Cable bending at low temperature
Method: IEC 60794-1-2 IEC 60794-1-21, E11A
(see also IEC 60811-1-4, Clause 8
IEC 60811-504)
Bending radius: 10 times cable diameter for flat cables;
diameter is the minor minimum
dimension. For cables with preferential
bend, the diameter is perpendicular to
the plane of bending.
Number of cycles: 2
Test temperature: 0 °C, –10 °C or –15 °C depending on
application and customer requirements
Number of turns per helix: according to Clause 8 of IEC 60811-1-4
IEC 60811-504
Requirements: in addition to the requirement of Clause
8 of IEC 60811-1-4 IEC 60811-504, no
fibre shall break during the test.
6.3.8 Cable flexing
Method: IEC 60794-1-2 IEC 60794-1-21, E8
Number of cycles: 300
Pulley diameter: 100 mm
Mass of weight: 2 kg
Requirement: no fibre breakage
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.9 Cable torsion
Method: IEC 60794-1-2 IEC 60794-1-21, E7
Number of cycles: 20
Distance between fixed and rotation clamp: 250 mm
Tension load: 20 N
Requirement: no fibre breakage
6.3.10 Cable kink
None.
6.4 Environmental requirements – Temperature cycling
Method: IEC 60794-1-2 IEC 60794-1-22, F1

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

Temperature: see Table 2
Requirement: the wavelength and maximum increase
in attenuation shall be agreed between
the customer and the supplier
Table 2 – Temperature cycling conditions
Temperature T Temperature 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) should shall be selected depending on application and customer requirements,
for example, condition c) is for appropriate for applications to implementation of ISO/IEC 11801 [3].

6.5 Transmission requirements
6.5.1 General
The transmission requirements shall be verified in accordance with IEC 60793-2-10 or
IEC 60793-2-50 and shall be agreed between the customer and the supplier. Maximum cable
attenuation shall comply with IEC 60794-1-1. See Tables 3 to 11.
NOTE 1 625 nm performance is optional depending upon agreement between the customer and the supplier.
6.5.2 Single mode optical fibres
Table 3 – Common single-mode fibre requirements
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Uncabled optical 4.1 IEC 60793-2
fibre
Cabled fibre cut-off 4.42 λ < λ operational IEC 60793-1-44
cc
wavelength
Fibre colouring 4.1 IEC 60304 Visual inspection
Outer diameter 4.1 As IEC 60793-2 IEC 60793-1-20
including colouring
Attenuation 4.42 IEC 60793-1-40
≤ 0,10 dB
discontinuities at
1 550 nm
6.5.3 Single-mode dispersion unshifted optical fibre (B1.1)
Table 4 – Cabled attenuation requirements for B1.1 optical fibre
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Attenuation 4.42 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm  ≤ 0,40 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,30 dB/km
– 14 – IEC 60794-2-30:2019 RLV © IEC 2019
6.5.4 Single-mode dispersion unshifted optical fibre (B1.2)
Table 5 – Cabled attenuation requirements for B1.2 optical fibre
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Attenuation According to detail
4.42 IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 550 nm  ≤ 0,25 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.5 Single-mode dispersion unshifted optical fibre (B1.3)
Table 6 – Cabled attenuation requirements for B1.3 optical fibre
IEC 60794-2:2017 Family (11) Test methods
Characteristics (9) Remarks (13)
subclause (10) requirements (12)
Attenuation 4.42 According to detail IEC 60793-1-40
coefficient (cabled
specification
fibres)
at 1 310 nm to
≤ 0,40 dB/km
1 625 nm
≤ 0,40 dB/km
at 1 383 nm
≤ 0,30 dB/km
at 1 550 nm
6.5.6 Single-mode dispersion shifted optical fibre (B2)
Table 7 – Cabled attenuation requirements for B2 optical fibre
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Attenuation 4.42 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm
≤ 0,50 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.7 Single-mode non-zero dispersion optical fibre (B4)
Table 8 – Cabled attenuation requirements for B4 optical fibre
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Attenuation 4.42 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.8 Single-mode wide band non-zero dispersion optical fibre (B5)
Table 9 – Cabled attenuation requirements for B5 optical fibre
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Attenuation According to detail
4.42 IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 460 nm ≤ 0,40 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.9 Single-mode bending loss insensitive optical fibre (B6)
Table 10 – Cabled attenuation requirements for B6 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm to
≤ 0,40 dB/km
1 625 nm
≤ 0,40 dB/km
at 1 383 nm
≤ 0,30 dB/km
at 1 550 nm
6.5.10 Multimode fibres
Table 11 – Requirements for multimode optical fibre (A1a and A1b)
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Uncabled optical 4.1 IEC 60793-2-10
fibre
Attenuation 4.42 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 850 nm 3,5 dB/km
at 1 300 nm 1,5 dB/km
Attenuation 4.42 ≤ 0,20 0,10 dB IEC 60793-1-40
discontinuities at
850 nm and
1 300 nm
Fibre colouring 4.1 IEC 60304 Visual inspection
Outer diameter 4.1 As IEC 60793-2 IEC 60793-1-20
including colouring
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. Applicable legislation and regulation are also taken into account.

– 16 – IEC 60794-2-30:2019 RLV © IEC 2019
IEC/TR 62222 references several IEC fire performance test methods and also other test
methods that may 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 of the patchcord assembly in
which the cable is intended to be used.
IEC TR 62222 [1] provides 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 also take
into account legislation and regulation applicable to the fire performance of cables that govern
the tests to be performed.
Tests to be performed shall be agreed between the customer and the supplier.

Annex A
(informative)
Example of cable construction
Optical fibre ribbon Tensile strength member
Sheath
Width
IEC
Figure A.1 – Example of cross-section of a four-fibre ribbon cable

Height
– 18 – IEC 60794-2-30:2019 RLV © IEC 2019
Annex B
(informative)
Family specification indoor cables – Optical fibre ribbon cables
B.1 Blank detail specification
B.1.1 Cable description
See Table B.1.
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 if required
(6) Cable description:
(7) Cable construction:
Optical fibres
Range of fibre count
Modularity
Construction Additional remarks
– Optical fibres and primary coating
– Ribbon
– Strength and anti-buckling members
Outer sheath
– Material
– Minimum wall thickness
Marking identification
– Customer requirement
– Identification of manufacturer
(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 nxd
Temperature range:
°C
– Transport and storage
°C
– Installation
°C
– Operation
Manufacturing cable length
M
– Typical
–0 +1 %
– Nominal/tolerances:
B.1.2 Cable element
See Table B.2.
Table B.2 – Cable element
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Optical fibres and 3.2 According to detail
primary coating specification
Buffer 3.3 According to detail Visual inspection
specification
Ribbon 3.8 According to detail IEC 60794-1-2 IEC
specification 60794-1-23 G2, G3
or G4
Strength and anti- 3.9 According to detail Visual inspection
buckling member specification
B.1.3 Cable construction
See Table B.3.
Table B.3 – Cable construction
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
Cable core According to detail Visual inspection
specification
Strength member 3.9 According to detail Visual inspection
specification
– Longitudinal
– Helical
– Embedded in the
sheath
Sheath 3.11
– Material According to detail
specification
– Minimum sheath According to detail IEC 60811-1-1
thickness specification IEC 60811-202
– Width and height According to detail IEC 60811-1-1
specification IEC 60811-203
– Optional According to detail
protection specification
– Abrasion According to detail IEC 60794-1-2
resistance specification IEC 60794-1-21,
Method E2A
Sheath marking 3.12
– Configuration, According to detail Visual inspection
dimensions specification
– Abrasion According to detail IEC 60794-1-2 Steel needle
resistance specification IEC 60794-1-21, diameter d = 1,0 mm
Method E2B Load: 4 N
Cable length
– 20 – IEC 60794-2-30:2019 RLV © IEC 2019
B.1.4 Installation and operating conditions
See Table B.4.
Table B.4 – Installation and operating conditions
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
General
requirements
Bend of cable According to detail IEC 60794-1-2
element specification IEC 60794-1-23,
Method G1
Ribbons: 3.8
– dimensions According to detail IEC 60794-3,
specification 8.2.3.1
– separability of According to detail IEC 60794-1-2
individual fibres specification IEC 60794-1-23,
from ribbon Method G5
or according to
detail specification
– ribbon stripping According to detail
specification
– torsion According to detail IEC 60794-1-2
specification IEC 60794-1-23,
Method G6
B.1.5 Mechanical, environmental and fire performance tests
See Table B.5.
Table B.5 – Tests applicable
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
Tensile 4.2.1 See 5.2.1 6.3.1 IEC 60794-1-2
performance IEC 60794-1-21,
Method E1A
Crush 4.2.2 See 5.2.2 6.3.2 IEC 60794-1-2
IEC 60794-1-21,
Method E3
Impact 4.2.3 See 5.2.3 6.3.3 IEC 60794-1-2
IEC 60794-1-2
...

IEC 60794-2-30 ®
Edition 3.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-30: Indoor cables – Family specification for optical fibre ribbon cables for
use in terminated cable assemblies

Câbles à fibres optiques –
Partie 2-30: Câbles intérieurs – Spécification de famille pour les câbles à rubans
de fibres optiques utilisés dans les assemblages de câbles connectorisés

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IEC 60794-2-30 ®
Edition 3.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-30: Indoor cables – Family specification for optical fibre ribbon cables for

use in terminated cable assemblies

Câbles à fibres optiques –
Partie 2-30: Câbles intérieurs – Spécification de famille pour les câbles à rubans

de fibres optiques utilisés dans les assemblages de câbles connectorisés

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6507-9

– 2 – IEC 60794-2-30:2019 © IEC 2019

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 Ruggedized 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 . 8
4.11 Sheath . 8
4.12 Sheath marking . 8
4.13 Identification . 8
4.14 Example of cable construction . 9
5 Dimensions. 9
5.1 Optical fibres and primary coating . 9
5.2 Ribbon structural geometry . 9
5.3 Optical fibre ribbon cable . 9
6 Tests . 10
6.1 General . 10
6.2 Dimensions . 10
6.3 Mechanical requirements . 10
6.3.1 Cable tensile performance . 10
6.3.2 Cable crush . 11
6.3.3 Cable impact . 11
6.3.4 Cable bending . 11
6.3.5 Cable repeated bending . 11
6.3.6 Cable bending under tension . 11
6.3.7 Cable bending at low temperature . 11
6.3.8 Cable flexing . 12
6.3.9 Cable torsion . 12
6.3.10 Cable kink . 12
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 optical fibre (B1.1) . 13
6.5.4 Single-mode dispersion unshifted optical fibre (B1.2) . 13
6.5.5 Single-mode dispersion unshifted optical fibre (B1.3) . 14
6.5.6 Single-mode dispersion shifted optical fibre (B2) . 14

6.5.7 Single-mode non-zero dispersion optical fibre (B4) . 14
6.5.8 Single-mode wide band non-zero dispersion optical fibre (B5) . 14
6.5.9 Single-mode bending loss insensitive optical fibre (B6) . 15
6.5.10 Multimode fibres . 15
6.6 Fire performance . 15
Annex A (informative) Example of cable construction . 16
Annex B (informative) Family specification indoor cables – Optical fibre ribbon cables . 17
B.1 Blank detail specification . 17
B.1.1 Cable description . 17
B.1.2 Cable element . 18
B.1.3 Cable construction . 18
B.1.4 Installation and operating conditions . 18
B.1.5 Mechanical, environmental and fire performance tests . 19
B.2 Cables subject to the MICE environmental classification (ISO 11801-3 and
related standards) . 19
Bibliography . 21

Figure 1 – Example of identification by means of colour coding and positioning . 9
Figure A.1 – Example of cross-section of a four-fibre ribbon cable . 16

Table 1 – Dimensions of optical fibre ribbon cables . 10
Table 2 – Temperature cycling conditions . 12
Table 3 – Common single-mode fibre requirements . 13
Table 4 – Cabled attenuation requirements for B1.1 optical fibre . 13
Table 5 – Cabled attenuation requirements for B1.2 optical fibre . 13
Table 6 – Cabled attenuation requirements for B1.3 optical fibre . 14
Table 7 – Cabled attenuation requirements for B2 optical fibre . 14
Table 8 – Cabled attenuation requirements for B4 optical fibre . 14
Table 9 – Cabled attenuation requirements for B5 optical fibre . 14
Table 10 – Cabled attenuation requirements for B6 optical fibre . 15
Table 11 – Requirements for multimode optical fibre (A1a and A1b) . 15
Table B.1 – Cable description . 17
Table B.2 – Cable element . 18
Table B.3 – Cable construction . 18
Table B.4 – Installation and operating conditions . 19
Table B.5 – Tests applicable . 19

– 4 – IEC 60794-2-30:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-30: Indoor cables –
Family specification for optical fibre ribbon
cables for use in terminated cable assemblies

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
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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
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
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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 60794-2-30 has been prepared by sub-committee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second 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) removal of Annex C;
b) reference to the most recent fibre standards;
c) reference to IEC 60794-1-21, IEC 60794-1-22, IEC 60794-1-23 and IEC 60794-1-24.

This standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2 and
IEC 60794-2.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1704/CDV 86A/1808/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60794 series, published under the general title Optical fibre cables,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "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.
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.
– 6 – IEC 60794-2-30:2019 © IEC 2019
OPTICAL FIBRE CABLES –
Part 2-30: Indoor cables –
Family specification for optical fibre ribbon
cables for use in terminated cable assemblies

1 Scope
This part of IEC 60794 is a family specification which covers indoor optical fibre ribbon cables
for use in terminated cable assemblies. The requirements of the sectional specification
IEC 60794-2 are applicable to cables covered by this document.
The requirements of this document are written to define flat ribbon cables. This document can
be applicable to other cable constructions. Parts of IEC 60794-3 which are applicable for
ribbon tests are the subject of IEC 60794-1-31.
Annex B contains requirements that supersede the normal requirements in case the cables
are intended to be used in installation governed by the MICE table of ISO 11801-3 [4] .
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 These reference complete the normative references already listed in the generic specifications
(IEC 60794-1-1 and IEC 60794-1-2).
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 60793-1-40, Optical fibres – Part 1-40: 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 specification – Sectional specification for
class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
__________
Numbers in square brackets refer to the Bibliography.

IEC 60794-1-2, 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 test 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 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification
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 60811-504, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 504: Mechanical tests – Bending tests at low temperature for insulation and sheaths
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Construction
4.1 General
In addition to the constructional requirements in IEC 60794-2, the following considerations
apply to ribbon cables for use in terminated cable assemblies.
The cable shall be designed and manufactured for a predicted operating lifetime of at least
15 years. In this context, the attenuation of the installed cable at the operational wavelength(s)
shall not exceed values agreed between the customer and the supplier. The materials in the
cable shall not present a health hazard within its intended use.
There shall be no fibre splice in a delivery length unless otherwise agreed by 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
Category A1 multimode fibres which meet the requirements of IEC 60793-2-10 or categories
B1.1, B1.2, B1.3, B2, B4, B5 and B6 single-mode optical fibres which meet the requirements

– 8 – IEC 60794-2-30:2019 © IEC 2019
of IEC 60793-2-50 shall be used. The linear coefficient of optical fibre attenuation and
attenuation point discontinuity may be affected by the cable manufacturing process. Maximum
values for these optical characteristics shall be agreed between the customer and the supplier.
4.3 Buffer
None.
4.4 Ruggedized fibre
None.
4.5 Slotted core
None.
4.6 Tube
None.
4.7 Stranded loose tube
None.
4.8 Ribbon structure
The ribbon structure shall be in accordance with IEC 60794-3.
4.9 Strength and anti-buckling members
The optical fibre ribbon cable may incorporate a tensile strength member. The strength
member may be a layer of suitable material, longitudinally or helically applied, and/or may be
embedded in the overall sheath.
4.10 Ripcord
None.
4.11 Sheath
The optical fibre ribbon shall be uniformly covered with a protective sheath generally as
shown in Figure A.1.
4.12 Sheath marking
If required, the cable shall be marked as agreed between the customer and the supplier.
4.13 Identification
The coated fibre shall be distinguishable by means of colour coding and positioning. For
example (see Figure 1):
a) a fibre ribbon has an identification coloured fibre on one side and a sub-identification
coloured one on the other side;
b) the identification and the sub-identification coloured fibres are the first and the last in the
fibre ribbon, respectively;
c) any colour of the identification colours group is different from that of the sub-identification
colours group;
d) the colour types and the order used for identification and sub-identification should be
agreed between the customer and the supplier. The colours of the other fibres shall be
agreed by the customer and/or the supplier;
e) the colour range used is similar to the first 12 colours described in Table 1 of
IEC 60794-2:2002, i.e., blue, yellow, red, white, green, violet, orange, grey, turquoise,
black, brown and pink.
Optical fibre Ribbon coating
1 2 3 n-1 n
• • •
Identification colour code Sub-identification colour code
IEC
NOTE 1 The identification colour enables each fibre ribbon to be identified individually within a group of ribbons.
NOTE 2 The sub-identification colour shows the ribbon group.
NOTE 3 The identification and the sub-identification colour in a ribbon enables each fibre to be identified
individually within the ribbon.
Figure 1 – Example of identification by means of colour coding and positioning
Other methods of identification are under consideration.
4.14 Example of cable construction
An example of a ribbon cable construction is shown in Figure A.1. Other configurations are
not precluded if they meet the mechanical, environmental and transmission requirements
given in this document.
5 Dimensions
5.1 Optical fibres and primary coating
The dimensions of the individual primary coated fibres in the finished product shall be in
accordance with IEC 60793-2.
5.2 Ribbon structural geometry
The ribbon geometry shall be in accordance with IEC 60794-3.
5.3 Optical fibre ribbon cable
The structural geometry of the optical fibre ribbon cables shall be designed so as to comply
with the mechanical, environmental and transmission requirements as defined in this
document. For instance, either rectangular or circular structure can be chosen.
In the case of a rectangular structure, the dimensions and the structural geometry of optical
fibre ribbon cables shall be as shown in Table 1.
Other structures can be applied if agreed between the supplier and the customer.

– 10 – IEC 60794-2-30:2019 © IEC 2019
Table 1 – Dimensions of optical fibre ribbon cables
Number of Optical fibre ribbon cables
fibres
Width Height
mm mm
Nominal Maximum tolerance Nominal Maximum tolerance
2 3,0 to 3,5 2,3 to 2,7
± 0,4 ± 0,3
4 3,0 to 3,5 ± 0,4 2,3 to 2,7 ± 0,3
6 3,5 to 4,0 2,3 to 2,7
± 0,4 ± 0,3
8 2,5 to 4,5 0,9 to 3,0
± 0,4 ± 0,3
12 3,5 to 5,5 ± 0,4 0,9 to 3,0 ± 0,3
NOTE These dimensions apply to the ribbon cable including the sheath and any strength members.

6 Tests
6.1 General
Compliance with the relevant detail specification requirements shall be verified by carrying out
tests selected from the following subclauses. It is not intended that all the tests shall be
carried out; the tests which are to be performed and the frequency of testing shall be agreed
between the customer and the supplier.
Some of the following tests can be performed on a short sample length of optical fibre ribbon
cable which is still an integral part of a longer length. For testing, the force shall be applied on
the flat sides of the cable. Thus, it becomes possible to detect permanent changes in
attenuation. The wavelength and maximum increase in attenuation change can be agreed
between the customer and the supplier.
6.2 Dimensions
The dimensions and structural geometry of optical fibre ribbon can be verified with a type test
described in IEC 60794-3 to establish and ensure proper control of the ribbon manufacturing
process. Once the process is established, and in order to ensure functional performance, the
dimensions of ribbons may be controlled and verified, for final inspection purposes, with a dial
gauge as described in Method G4 of IEC 60794-1-23. The size of the optical fibre ribbon
cable, width and height shall be measured in accordance with the methods of IEC 60811-203.
6.3 Mechanical requirements
6.3.1 Cable tensile performance
Method: IEC 60794-1-21, E1
Diameter of chuck drums and transfer devices: not lower than the minimum dynamic
bending diameter specified for the cable
Velocity of transfer device: either 100 mm/min or 100 N/min
Load: 200 N applied for 5 min
Length of sample: sufficient to achieve the desired
accuracy of measurement of attenuation
and shall be agreed between the
customer and the supplier.
Requirement: no change in attenuation after the test,
and there shall be no damage to the
cable elements.
6.3.2 Cable crush
Method: IEC 60794-1-21, E3
Force: 500 N
Duration: 1 min
Length between test locations: 500 mm
Requirement: no change in attenuation after the test,
and there shall be no damage to the
cable elements.
NOTE The force is applied on the flat sides of the cable.
6.3.3 Cable impact
Method: 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
Requirement: no fibre breakage
NOTE The force is applied on the flat sides of the cable.
6.3.4 Cable bending
Method: IEC 60794-1-21, E11A
Mandrel diameter: 50 mm
Number of turns per helix: 6
Number of cycles: 10
Requirements: no fibre breakage
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.5 Cable repeated bending
Method: IEC 60794-1-21, E6
Bending radius: 100 mm
Number of cycles: 300
Mass of weights: 2 kg
Requirement: no fibre breakage
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.6 Cable bending under tension
None.
6.3.7 Cable bending at low temperature
Method: IEC 60794-1-21, E11A (see also
IEC 60811-504)
Bending radius: 10 times cable diameter for flat cables;
diameter is the minimum dimension. For
cables with preferential bend, the
diameter is perpendicular to the plane of
bending.
Number of cycles: 2
– 12 – IEC 60794-2-30:2019 © IEC 2019
Test temperature: 0 °C, –10 °C or –15 °C depending on
application and customer requirements
Number of turns per helix: according to IEC 60811-504
Requirements: in addition to the requirement of
IEC 60811-504, no fibre shall break
during the test.
6.3.8 Cable flexing
Method: IEC 60794-1-21, E8
Number of cycles: 300
Pulley diameter: 100 mm
Mass of weight: 2 kg
Requirement: no fibre breakage
NOTE The bending is applied in the vertical direction to the flat sides of the cable.
6.3.9 Cable torsion
Method: IEC 60794-1-21, E7
Number of cycles: 20
Distance between fixed and rotation clamp: 250 mm
Tension load: 20 N
Requirement: no fibre breakage
6.3.10 Cable kink
None.
6.4 Environmental requirements – Temperature cycling
Method: IEC 60794-1-22, F1
Number of cycles: 2
Length of sample: sufficient to achieve the desired
accuracy of measurement of attenuation
Temperature: see Table 2
Requirement: the wavelength and maximum increase
in attenuation shall be agreed between
the customer and the supplier
Table 2 – Temperature cycling conditions
Temperature T Temperature T
A B
a)
0 °C 50 °C
b)
–5 °C 50 °C
c) –20 °C 60 °C
d)
–45 °C 60 °C
Condition a), b), c) or d) shall be selected depending on application and customer requirements; for example,
condition c) is for appropriate implementation of ISO/IEC 11801 [3].

6.5 Transmission requirements
6.5.1 General
The transmission requirements shall be verified in accordance with IEC 60793-2-10 or
IEC 60793-2-50 and shall be agreed between the customer and the supplier. Maximum cable
attenuation shall comply with IEC 60794-1-1. See Tables 3 to 11.
6.5.2 Single mode optical fibres
Table 3 – Common single-mode fibre requirements
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Uncabled optical 4.1 IEC 60793-2
fibre
Cabled fibre cut-off 4.2 λ < λ operational IEC 60793-1-44
cc
wavelength
Fibre colouring 4.1 IEC 60304 Visual inspection
Outer diameter 4.1 As IEC 60793-2 IEC 60793-1-20
including colouring
Attenuation 4.2 IEC 60793-1-40
≤ 0,10 dB
discontinuities at
1 550 nm
6.5.3 Single-mode dispersion unshifted optical fibre (B1.1)
Table 4 – Cabled attenuation requirements for B1.1 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm
≤ 0,40 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,30 dB/km
6.5.4 Single-mode dispersion unshifted optical fibre (B1.2)
Table 5 – Cabled attenuation requirements for B1.2 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 550 nm  ≤ 0,25 dB/km
at 1 625 nm
≤ 0,40 dB/km
– 14 – IEC 60794-2-30:2019 © IEC 2019
6.5.5 Single-mode dispersion unshifted optical fibre (B1.3)
Table 6 – Cabled attenuation requirements for B1.3 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation According to detail
4.2 IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm to ≤ 0,40 dB/km
1 625 nm
≤ 0,40 dB/km
at 1 383 nm
≤ 0,30 dB/km
at 1 550 nm
6.5.6 Single-mode dispersion shifted optical fibre (B2)
Table 7 – Cabled attenuation requirements for B2 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm ≤ 0,50 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.7 Single-mode non-zero dispersion optical fibre (B4)
Table 8 – Cabled attenuation requirements for B4 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.8 Single-mode wide band non-zero dispersion optical fibre (B5)
Table 9 – Cabled attenuation requirements for B5 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 460 nm
≤ 0,40 dB/km
at 1 550 nm
≤ 0,30 dB/km
at 1 625 nm
≤ 0,40 dB/km
6.5.9 Single-mode bending loss insensitive optical fibre (B6)
Table 10 – Cabled attenuation requirements for B6 optical fibre
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Attenuation According to detail
4.2 IEC 60793-1-40
coefficient (cabled specification
fibres)
at 1 310 nm to ≤ 0,40 dB/km
1 625 nm
≤ 0,40 dB/km
at 1 383 nm
≤ 0,30 dB/km
at 1 550 nm
6.5.10 Multimode fibres
Table 11 – Requirements for multimode optical fibre (A1a and A1b)
Characteristics IEC 60794-2:2017 Family Test methods Remarks
subclause requirements
Uncabled optical 4.1 IEC 60793-2-10
fibre
Attenuation 4.2 According to detail IEC 60793-1-40
coefficient (cabled specification
fibres)
at 850 nm 3,5 dB/km
at 1 300 nm 1,5 dB/km
Attenuation 4.2 IEC 60793-1-40
≤ 0,10 dB
discontinuities at
850 nm and
1 300 nm
Fibre colouring 4.1 IEC 60304 Visual inspection
Outer diameter 4.1 As IEC 60793-2 IEC 60793-1-20
including colouring
6.6 Fire performance
IEC TR 62222 [1] provides 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 also take
into account legislation and regulation applicable to the fire performance of cables that govern
the tests to be performed.
Tests to be performed shall be agreed between the customer and the supplier.

– 16 – IEC 60794-2-30:2019 © IEC 2019
Annex A
(informative)
Example of cable construction
Optical fibre ribbon Tensile strength member
Sheath
Width
IEC
Figure A.1 – Example of cross-section of a four-fibre ribbon cable

Height
Annex B
(informative)
Family specification indoor cables – Optical fibre ribbon cables
B.1 Blank detail specification
B.1.1 Cable description
See Table B.1.
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 if required
(6) Cable description:
(7) Cable construction:
Optical fibres
Range of fibre count
Modularity
Construction Additional remarks
– Optical fibres and primary coating
– Ribbon
– Strength and anti-buckling members
Outer sheath
– Material
– Minimum wall thickness
Marking identification
– Customer requirement
– Identification of manufacturer
(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 nxd
Temperature range:
°C
– Transport and storage
°C
– Installation
°C
– Operation
Manufacturing cable length
M
– Typical
–0 +1 %
– Nominal/tolerances:
– 18 – IEC 60794-2-30:2019 © IEC 2019
B.1.2 Cable element
See Table B.2.
Table B.2 – Cable element
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods Remarks (13)
subclause (10) requirements (12)
Optical fibres and 3.2 According to detail
primary coating specification
Buffer 3.3 According to detail Visual inspection
specification
Ribbon 3.8 According to detail IEC 60794-1-23
specification G2, G3 or G4
Strength and anti- 3.9 According to detail Visual inspection
buckling member specification
B.1.3 Cable construction
See Table B.3.
Table B.3 – Cable construction
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
Cable core According to detail Visual inspection
specification
Strength member 3.9 According to detail Visual inspection
specification
– Longitudinal
– Helical
– Embedded in the
sheath
Sheath 3.11
– Material According to detail
specification
– Minimum sheath According to detail IEC 60811-202
thickness specification
– Width and height According to detail IEC 60811-203
specification
– Optional According to detail
protection specification
– Abrasion According to detail IEC 60794-1-21
resistance specification Method E2A
Sheath marking 3.12
– Configuration, According to detail Visual inspection
dimensions specification
– Abrasion According to detail IEC 60794-1-21 Steel needle
resistance specification Method E2B diameter d = 1,0 mm
Load: 4 N
Cable length
B.1.4 Installation and operating conditions
See Table B.4.
Table B.4 – Installation and operating conditions
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
General
requirements
Bend of cable According to detail IEC 60794-1-23
element specification Method G1
Ribbons: 3.8
– dimensions According to detail IEC 60794-3
specification
– separability of According to detail IEC 60794-1-23
individual fibres specification Method G5
from ribbon or according to
detail specification
– ribbon stripping According to detail
specification
– torsion According to detail IEC 60794-1-23
specification Method G6
B.1.5 Mechanical, environmental and fire performance tests
See Table B.5.
Table B.5 – Tests applicable
Characteristics (9) IEC 60794-2:2017 Family (11) Test methods (12) Remarks (13)
subclause (10) requirements
Tensile 4.2.1 See 6.3.1 IEC 60794-1-21
performance Method E1
IEC 60794-1-21
Crush 4.2.2 See 6.3.2
Method E3
Impact 4.2.3 See 6.3.3 IEC 60794-1-21
Method E4
Bending 4.2.4 See 6.3.4 IEC 60794-1-21
Method E11A
Repeated bending 4.2.5 See 6.3.5 IEC 60794-1-21
Method E6
Bending at low 4.2.7 See 6.3.7 IEC 60794-1-21
temperature Method E11A
Flexing 4.2.8 See 6.3.8 IEC 60794-1-21
Method E8
Torsion 4.2.9 See 6.3.9 IEC 60794-1-21
Method E7
Temperature 4.3.1 See 6.4 IEC 60794-1-22
cycling Method F1
Fire performance 4.5 See 6.6 IEC TR 62222

B.2 Cables subject to the MICE environ
...