SIST EN IEC 60794-2-24:2024

Optical fibre cables - Part 2-24: Indoor cables - Detail specification for multiple multi-fibre unit cables for use in MPO connector terminated breakout cable assemblies (IEC 60794-2-24:2024)

IEC 60794-2-24:2024 is a detail specification and specifies indoor multiple multi-fibre unit cables for use in MPO (multi-fibre push on) connector terminated breakout cable assemblies.

Lichtwellenleiterkabel - Teil 2-24: Lichtwellenleiterkabel für den Innenbereich - Bauartspezifikation für Kabel mit mehreren Fasereinheiten zur Verwendung in Kabelkonfektionen mit MPO-Steckern (IEC 60794-2-24:2024)

Câbles à fibres optiques - Partie 2-24: Câbles intérieurs - Spécification particulière pour les câbles à plusieurs unités multifibres utilisés dans les câbles assemblés épanouis équipés de connecteurs MPO (IEC 60794-2-24:2024)

IEC 60794-2-24: 2024 est une spécification particulière portant sur les câbles intérieurs à plusieurs unités multifibres, destinés à être utilisés dans les câbles assemblés épanouis équipés de connecteurs MPO (multi-fibre push on).

Optični kabli - 2-24. del: Notranji kabli - Podrobna specifikacija za večžilne večvlakenske kable za uporabo v kabelskih razdelilnih sestavih, zaključenih z večvlakenskimi natičnimi konektorji (IEC 60794-2-24:2024)

Standard IEC 60794-2-24:2024 je podrobna specifikacija in določa večvlakenske enote kablov za notranjo uporabo z večvlakenskimi natičnimi konektorji za uporabo v zaključenih odporno oplaščenih kabelskih sestavih.

General Information

• Status: Published
• Public Enquiry End Date: 28-Feb-2023
• Publication Date: 13-Mar-2024
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Mar-2024
• Due Date: 18-May-2024
• Completion Date: 14-Mar-2024
• Ref Project: EN IEC 60794-2-24:2024 - Optical fibre cables - Part 2-24: Indoor cables - Detail specification for multiple multi-fibre unit cables for use in MPO connector terminated breakout cable assemblies

Overview

EN IEC 60794-2-24:2024 - part of the IEC/CENELEC optical fibre cable series - is a detail specification for indoor multiple multi‑fibre unit optical fibre cables intended for use in MPO connector terminated breakout cable assemblies. The standard defines construction elements, required tests and performance categories relevant to high-density indoor cabling where MPO (multi‑fibre push‑on) connectivity and breakout assemblies are used.

Key Topics

The standard focuses on practical design and verification topics for indoor multi‑fibre cables, including:

• Cable construction

  • Optical fibres and multi‑fibre units (ribbons, bundles, sheathed units)
  • Stranded core arrangements, strength and anti‑buckling members
  • Ripcords, cable sheath materials and sheath marking
  • Examples of cross‑section layouts for typical 48–72 fibre assemblies (see Annex B)

• Mechanical tests (specified test types, not pass/fail values)

  • Impact, bending, repeated bending, torsion
  • Abrasion resistance of cable marking
  • Dimensional verification

• Environmental tests

  • Temperature cycling and related sample preparation (see Annex A)

• Transmission and fire requirements

  • Transmission performance criteria and applicable fire performance for indoor use are covered in the document

• Normative references

  • Cross‑references to related IEC standards for fibres, cable tests and component specifications (e.g., IEC 60793 series, IEC 60794‑1‑xx series, IEC 61753‑1 noted in bibliography)

Applications

EN IEC 60794-2-24:2024 is intended to guide design, manufacture, testing and procurement of indoor optical cables used in:

• High‑density data centres and meet‑me‑rooms where MPO‑terminated breakout cable assemblies connect patch panels and equipment
• Enterprise backbone and campus installations requiring multi‑fibre breakout configurations
• Premises cabling and telecommunication rooms where compact multi‑fibre units (ribbons, bundles) are terminated with MPO/MTP connectors

Using the standard helps ensure consistent cable construction, mechanical robustness and predictable optical transmission in MPO breakout assemblies.

Who should use this standard

• Cable manufacturers and designers specifying indoor multi‑fibre cables
• System integrators and assembly houses producing MPO‑terminated breakout assemblies
• Test laboratories performing mechanical and environmental qualification
• Procurement and specifications teams writing product requirements for data centre and enterprise cabling

Related standards

• IEC/EN IEC 60794‑2 (Sectional specification for indoor cables)
• IEC 60794‑2‑20, IEC 60794‑2‑23 (other family/detail specs for multi‑fibre/MPO applications)
• IEC 60793 series (optical fibre product and test methods)
• IEC 60794‑1‑21 / 1‑22 / 1‑31 (generic cable test procedures and elements)

Keywords: EN IEC 60794-2-24:2024, optical fibre cables, indoor cables, MPO connector, breakout cable assemblies, multi‑fibre unit, cable construction, mechanical tests, temperature cycling.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2024
Optični kabli - 2-24. del: Notranji kabli - Podrobna specifikacija za večžilne
večvlakenske kable za uporabo v kabelskih razdelilnih sestavih, zaključenih z
večvlakenskimi natičnimi konektorji (IEC 60794-2-24:2024)
Optical fibre cables - Part 2-24: Indoor cables - Detail specification for multiple multi-fibre
unit cables for use in MPO connector terminated breakout cable assemblies (IEC 60794-
2-24:2024)
Lichtwellenleiterkabel - Teil 2-24: Lichtwellenleiterkabel für den Innenbereich -
Bauartspezifikation für Kabel mit mehreren Fasereinheiten zur Verwendung in
Kabelkonfektionen mit MPO-Steckern (IEC 60794-2-24:2024)
Câbles à fibres optiques - Partie 2-24: Câbles intérieurs - Spécification particulière pour
les câbles à plusieurs unités multifibres utilisés dans les câbles assemblés épanouis
équipés de connecteurs MPO (IEC 60794-2-24:2024)
Ta slovenski standard je istoveten z: EN IEC 60794-2-24:2024
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60794-2-24

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2024
ICS 33.180.10
English Version
Optical fibre cables - Part 2-24: Indoor cables - Detail
specification for multiple multi-fibre unit cables for use in MPO
connector terminated breakout cable assemblies
(IEC 60794-2-24:2024)
Câbles à fibres optiques - Partie 2-24: Câbles intérieurs - Lichtwellenleiterkabel - Teil 2-24: Lichtwellenleiterkabel für
Spécification particulière pour les câbles à plusieurs unités den Innenbereich - Bauartspezifikation für Kabel mit
multifibres utilisés dans les câbles assemblés épanouis mehreren Fasereinheiten zur Verwendung in
équipés de connecteurs MPO Kabelkonfektionen mit MPO-Steckern
(IEC 60794-2-24:2024) (IEC 60794-2-24:2024)
This European Standard was approved by CENELEC on 2024-03-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-2-24:2024 E

European foreword
The text of document 86A/2391/FDIS, future edition 1 of IEC 60794-2-24, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60794-2-24:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-12-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-03-01
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60794-2-24:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61753-1 NOTE Approved as EN IEC 61753-1
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-20 - Optical fibres - Part 1-20: Measurement EN 60793-1-20 -
methods and test procedures - Fibre
geometry
IEC 60793-1-21 - Optical fibres - Part 1-21: Measurement EN 60793-1-21 -
methods and test procedures - Coating
geometry
IEC 60793-1-40 - Optical fibres - Part 1-40: Attenuation EN IEC 60793-1-40 -
measurement methods
IEC 60793-1-46 - Optical fibres - Part 1-46: Measurement EN 60793-1-46 -
methods and test procedures - Monitoring of
changes in optical transmittance
IEC 60793-2-10 - Optical fibres - Part 2-10: Product EN IEC 60793-2-10 -
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 - Optical fibres - Part 2-50: Product EN IEC 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres
IEC 60794-1-1 - Optical fibre cables - Part 1-1: Generic EN IEC 60794-1-1 -
specification - General
IEC 60794-1-2 - Optical fibre cables - Part 1-2: Generic EN IEC 60794-1-2 -
specification - Basic optical cable test
procedures - General guidance
IEC 60794-1-21 - Optical fibre cables - Part 1-21: Generic EN 60794-1-21 -
specification - Basic optical cable test
procedures - Mechanical tests methods
IEC 60794-1-22 - Optical fibre cables - Part 1-22: Generic EN IEC 60794-1-22 -
specification - Basic optical cable test
procedures - Environmental test methods
IEC 60794-1-31 - Optical fibre cables - Part 1-31: Generic EN IEC 60794-1-31 -
specification - Optical cable elements -
Optical fibre ribbon
Publication Year Title EN/HD Year
IEC 60794-2 - Optical fibre cables - Part 2: Indoor cables - EN 60794-2 -
Sectional specification
IEC 60794-2-20 - Optical fibre cables - Part 2-20: Indoor cables EN 60794-2-20 -
- Family specification for multi-fibre optical
cables
IEC 60794-2-23 - Optical fibre cables - Part 2-23: Indoor cables - -
- Detail specification for multi-fibre cables for
use in MPO connector terminated cable
assemblies
IEC 60811-202 - Electric and optical fibre cables - Test EN 60811-202 -
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 EN 60811-203 -
methods for non-metallic materials - Part
203: General tests - Measurement of overall
dimensions
IEC 60794-2-24 ®
Edition 1.0 2024-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 2-24: Indoor cables – Detail specification for multiple multi-fibre unit cables

for use in MPO connector terminated breakout cable assemblies

Câbles à fibres optiques –
Partie 2-24: Câbles intérieurs – Spécification particulière pour les câbles à

plusieurs unités multifibres utilisés dans les câbles assemblés épanouis

équipés de connecteurs MPO
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10  ISBN 978-2-8322-8150-5

– 2 – IEC 60794-2-24:2024 © IEC 2024
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 . 7
4.3 Multi-fibre unit . 8
4.4 Stranded core . 8
4.5 Strength and anti-buckling members . 8
4.6 Ripcord . 8
4.7 Cable sheath . 8
4.8 Sheath marking . 8
4.9 Examples of cable constructions . 8
5 Tests . 8
5.1 General . 8
5.2 Dimensions . 9
5.3 Mechanical requirements . 9
5.3.1 General . 9
5.3.2 Impact . 9
5.3.3 Bending . 10
5.3.4 Repeated bending . 10
5.3.5 Torsion . 10
5.3.6 Abrasion resistance of cable marking . 11
5.4 Environmental requirements – Temperature cycling . 11
6 Transmission requirements . 12
7 Fire performance . 12
Annex A (normative) Cable sample preparation for bending and temperature cycling
test . 13
Annex B (informative) Examples of cable constructions . 14
B.1 Optical cables for use in MPO connector terminated breakout cable
assemblies, containing multi-fibre units with sheaths/tubes . 14
B.2 Optical cables for use in MPO connector terminated breakout cable
assemblies, containing fibre bundles with tie yarn . 15
B.3 Optical cables for use in MPO connector terminated breakout cable
assemblies, containing partially bonded fibre ribbons . 15
Bibliography . 17

Figure A.1 – Sample preparation and lengths for multiple multi-unit cables for use in
MPO connector terminated breakout cable assemblies . 13
Figure B.1 – Example of a cross-section of a 48-fibre breakout cable containing 12-
fibre units (with sheaths/tubes and strength members), without central strength
member . 14
Figure B.2 – Example of a cross-section of a 72-fibre breakout cable containing 12-
fibre units (with sheaths/tubes and strength members), with central strength member . 14
Figure B.3 – Example of a cross-section of a 48-fibre breakout cable containing 12-
fibre units (with tubes and without strength members), without central strength member . 15

IEC 60794-2-24:2024 © IEC 2024 – 3 –
Figure B.4 – Example of a cross-section of a 48-fibre cable containing 12-fibre bundles
with tie yarn, without central strength member . 15
Figure B.5 – Example of a cross-section of a 48-fibre cable containing 12-fibre partially

bonded fibre ribbons, without central strength member . 16

Table 1 – Preferred low and high temperatures . 11

– 4 – IEC 60794-2-24:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-24: Indoor cables –
Detail specification for multiple multi-fibre unit cables for use
in MPO connector terminated breakout cable assemblies

FOREWORD
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shall not be held responsible for identifying any or all such patent rights.
IEC 60794-2-24 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical
committee 86: Fibre optics. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2391/FDIS 86A/2413/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
IEC 60794-2-24:2024 © IEC 2024 – 5 –
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 the 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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