iTeh Standards logo
EURUSD
Your shopping cart is empty.
CLC

EN IEC 60794-2-21:2019/A1:2021

(Amendment)

Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling

Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling

Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel - Bauartspezifikation für Mehrfaserverteilerkabel für anwendungsneutrale Standortverkabelung

Câbles à fibres optiques - Partie 2-21: Câbles intérieurs - Spécification particulière pour les câbles optiques multifibres de distribution utilisés dans le câblage de locaux

Optični kabli - 2-21. del: Notranji optični kabli - Podrobna specifikacija za razdelilne večvlakenske optične kable za okablenje prostorov - Dopolnilo A1 (IEC 60794-2-21:2019/A1:2020)

General Information

Status
Published
Publication Date
07-Jan-2021
ICS
33.180.10 - Fibres and cables
Technical Committee
CLC/TC 86A - Optical fibres and optical fibre cables
Drafting Committee
IEC/SC 86A - IEC_SC_86A
Current Stage
6060 - Document made available - Publishing
Start Date
08-Jan-2021
Completion Date
08-Jan-2021
Ref Project
SIST EN IEC 60794-2-21:2019/A1:2021 - Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling (IEC 60794-2-21:2019/A1:2020)

Relations

Amends
EN IEC 60794-2-21:2019 - Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling
Effective Date
26-May-2020

Overview

EN IEC 60794-2-21:2019/A1:2021 is an amendment to the international and European standard for indoor multi‑fibre optical distribution cables used in premises cabling. Prepared by IEC TC 86/SC 86A and approved by CENELEC, this amendment updates the detailed specification for indoor cables with targeted guidance on multimode fibre bandwidth in the 840 nm to 953 nm wavelength range.

This document is relevant for manufacturers, system designers, installers and procurement teams working with indoor optical fibre distribution systems who require clear criteria for multimode performance, interoperability and installation practices.

Key Topics

  • Scope and status: Amendment 1 modifies IEC 60794-2-21:2019 and has been adopted as EN IEC 60794-2-21:2019/A1:2021 by CENELEC.
  • Multimode fibre bandwidth: The amendment replaces the table of minimum multimode fibre bandwidths (Table 3) and provides updated guidance for effective modal bandwidth across the 840 nm to 953 nm wavelength range.
  • Guidance values: The amendment references guidance in IEC 60793-2-10 and explicitly notes example effective modal bandwidth guidance at 953 nm for multimode fibre classes, including:
    • OM3: guidance 1 033 MHz·km at 953 nm
    • OM4: guidance 1 459 MHz·km at 953 nm
    • OM5: updated entries are included in the revised table (see standard for exact figures)
  • Interoperability and installation: By clarifying bandwidth expectations and modal guidance, the amendment supports improved interoperability between fibre, cable and active components and helps define reliable installation practices.

Applications

This amendment and the underlying standard are aimed at indoor premises cabling and related applications such as:

  • Building backbone and horizontal distribution in commercial and enterprise premises
  • Data centre intra‑rack and inter‑rack cabling where multimode fibre is used
  • Campus and institutional indoor distribution systems
  • Procurement specifications where clear multimode performance metrics (EMB, OM3/OM4/OM5) are required

Benefits for users include:

  • Clearer bandwidth guidance for multimode fibre selection
  • Improved compatibility and interoperability across suppliers
  • Better-defined acceptance criteria for installation and testing

Related Standards

  • IEC 60794 series - optical fibre cable test procedures and cable specification parts (parent series)
  • IEC 60793-2-10 - multimode fibre effective modal bandwidth guidance (referenced for EMB values)
  • EN IEC 60794-2-21:2019 - base publication to which Amendment 1 applies

For exact numeric limits, the full amended Table 3 and all normative references should be consulted in EN IEC 60794-2-21:2019/A1:2021. This summary highlights practical implications for specification, selection and installation of indoor multi‑fibre optical distribution cables used in premises cabling.

EN IEC 60794-2-21:2019/A1:2021EN IEC 60794-2-21:2019/A1:2021
PreviousNext
Amendment
EN IEC 60794-2-21:2019/A1:2021
English language
6 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Frequently Asked Questions

EN IEC 60794-2-21:2019/A1:2021 is a amendment published by CLC. Its full title is "Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling". This standard covers: Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling

Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling

EN IEC 60794-2-21:2019/A1:2021 is classified under the following ICS (International Classification for Standards) categories: 33.180.10 - Fibres and cables. The ICS classification helps identify the subject area and facilitates finding related standards.

EN IEC 60794-2-21:2019/A1:2021 has the following relationships with other standards: It is inter standard links to EN IEC 60794-2-21:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase EN IEC 60794-2-21:2019/A1:2021 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-marec-2021
Optični kabli - 2-21. del: Notranji optični kabli - Podrobna specifikacija za
razdelilne večvlakenske optične kable za okablenje prostorov - Dopolnilo A1 (IEC
60794-2-21:2019/A1:2020)
Optical fibre cables - Part 2-21: Indoor cables - Detailed specification for multi-fibre
optical distribution cables for use in premises cabling (IEC 60794-2-21:2019/A1:2020)
Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel - Bauartspezifikation für
Mehrfaserverteilerkabel für anwendungsneutrale Standortverkabelung (IEC 60794-2-
21:2019/A1:2020)
Amendement 1 - Câbles à fibres optiques - Partie 2-21: Câbles intérieurs - Spécification
particulière pour les câbles optiques multifibres de distribution utilisés dans le câblage de
locaux (IEC 60794-2-21:2019/A1:2020)
Ta slovenski standard je istoveten z: EN IEC 60794-2-21:2019/A1:2021
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 60794-2-21:2019/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2021
ICS 33.180.10
English Version
Optical fibre cables - Part 2-21: Indoor cables - Detailed
specification for multi-fibre optical distribution cables for use in
premises cabling
(IEC 60794-2-21:2019/A1:2020)
Câbles à fibres optiques - Partie 2-21: Câbles intérieurs - Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel -
Spécification particulière pour les câbles optiques Bauartspezifikation für Mehrfaserverteilerkabel für
multifibres de distribution utilisés dans le câblage de locaux anwendungsneutrale Standortverkabelung
(IEC 60794-2-21:2019/A1:2020) (IEC 60794-2-21:2019/A1:2020)
This amendment A1 modifies the European Standard EN IEC 60794-2-21:2019; it was approved by CENELEC on 2020-12-23. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-2-21:2019/A1:2021 E

European foreword
The text of document 86A/2012/CDV, future IEC 60794-2-21/A1, 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 60794-2-21:2019/A1:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-09-23
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-12-23
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.
Endorsement notice
The text of the International Standard IEC 60794-2-21:2019/A1:2020 was approved by CENELEC as
a European Standard without any modification.

IEC 60794-2-21 ®
Edition 3.0 2020-11
INTERNATIONAL
STANDARD
AMENDMENT 1
Optical fibre cables –
Part 2-21: Indoor cables – Detailed specification for multi-fibre optical

distribution cables for use in premises cabling

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-9071-2

– 2 – IEC 60794-2-21:2019/AMD1:2020
© IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 2-21: Indoor cables –
Detailed specification for multi-fibre optical distribution cables
for use in premises cabling
AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization com
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...

This May Also Interest You

CLC
EN IEC 60794-1-207:2025(Main)
Optical fibre cables - Part 1-207: Generic specification - Basic optical cable test procedures - Environmental test methods - Nuclear radiation, Method F7
SIST EN IEC 60794-1-207:2026

IEC 60794-1-207:2025 describes test procedures to be used in establishing uniform requirements for optical fibre cables for the environmental property: performance degradation when exposed to nuclear radiation. This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. Method F7A evaluates performance degradation of optical fibre cable in environmental background radiation; Method F7B evaluates performance degradation of optical fibre cable in adverse nuclear environments. NOTE Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This first edition cancels and replaces the method F7 of the second edition of IEC 60794-1-22 published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) detailed content of sample, apparatus, procedure, requirements and details of the method to be specified and reported are added.

  • Draft
    9 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-129:2025(Main)
Optical fibre cables - Part 1-129: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Straight midspan access to optical elements, Method E29
SIST EN IEC 60794-1-129:2026

IEC 60794-1-129:2025 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. The document defines test procedures used in establishing uniform requirements for mechanical performance-straight midspan access to optical elements. Throughout this document, the wording "optical cable" also includes optical fibre units, microduct fibre units, etc. NOTE See IEC 60794‑1‑2 for a reference guide to test methods of all types and for general requirements and definitions. This edition includes the following significant technical changes with respect to IEC 60794‑1‑21:2015 and IEC 60794-1-21:2015/AMD 1:2020: a) this document cancels and replaces method E29 of IEC 60794-1-21:2015 and IEC 60794‑1‑21:2015/AMD 1:2020; b) addition of the description for applicable cable types; c) update of Figure 2a), Figure 2b) and Figure 3; d) addition of the displacement measure description; e) addition of the details to be reported.

  • Draft
    10 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-107:2025(Main)
Optical fibre cables - Part 1-107: Generic specification - Basic optical cable test procedures - Mechanical test methods - Torsion, method E7
SIST EN IEC 60794-1-107:2026

IEC 60794-1-107:2025 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. This document defines test procedures used in establishing uniform requirements for torsion performance. Refer to IEC 60794-1-2 for a reference guide to test methods and for general requirements and definitions. NOTE Throughout this document, the wording "optical cable" also includes optical fibre units, microduct fibre units, etc. This first edition partially cancels and replaces IEC 60794-1-21:2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794-1-21:2015: a) Update of the typical test length according to the different types of cables; b) Update of Figure 2 by loading weights to cable gripping fixture.

  • Draft
    10 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-130:2025(Main)
Optical fibre cables - Part 1-130: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Coefficient of friction between cables, Methods E30
SIST EN IEC 60794-1-130:2026

IEC 60794-1-130:2025 describes test procedures to evaluate the coefficient of dynamic friction of the sheathing material of a cable when pulled over or between other cables. Methods E30A and E30B evaluate the coefficient of friction between cables for when either a cable is pulled over the top of other cables (drum test) or when pulling a cable between other cables of the same shape (flat plate test). This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. Throughout the document, wording "optical cable" can also include optical fibre units and microduct fibre units. This first edition cancels and replaces Method E24 of the first edition of IEC 60794‑1‑21 published in 2015, Amendment 1:2020. This edition constitutes a technical revision.

  • Standard
    14 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60793-2-60:2025(Main)
Optical fibres - Part 2-60: Product specifications - Sectional specification for class C single-mode interconnection fibres
SIST EN IEC 60793-2-60:2026

IEC 60793-2-60:2025 is applicable to optical fibre types C1, C2, C3, and C4, as described in Table 1. These fibres are used for the interconnections within or between optical components systems and are optimized to support dense optical connectivity. While the fibres can be overcoated or buffered for the purpose of making protected pigtails, they can be used without overcoating. They can, however, be colour coded. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) replacement of "intraconnection" with "interconnection" and addition of the definition of "interconnection fibres"; b) modification of the nominal MFD limit of C1 fibres; c) addition of "Primary coating diameter-coloured" limits for class C fibres and change of "Primary coating diameter-uncoloured" limits for class C_80 fibres; d) change of coating strip force limits for class C1, class C2, and class C3 fibres; e) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" and revision of "Note b" in Table 6; f) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" and deletion of the "Note" in Table 8; g) addition of 200 μm coating diameter requirements for C1_125 fibres and change of coating diameters limits for C1_80 fibres in Table A.1; h) addition of 200 µm coating diameter requirements for C1_125 fibres and change of coating strip force limits in Table A.2 and in Table A.5; i) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength", modification of the "Cable cut-off wavelength" limit and addition of a new "Note" in Table A.3; j) addition of a transmission requirements at 1 625 nm and deletion of 1 310 nm for C1 fibres in Table A.4; k) modification of "Fibre cut-off wavelength" limits of C3 fibres in Table C.3; l) replacement of "Fibre cut-off wavelength" with "Cable cut-off wavelength" for C4 fibres in Table D.3.

  • Standard
    26 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-110:2025(Main)
Optical fibre cables - Part 1-110: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Kink, Method E10
SIST EN IEC 60794-1-110:2025

IEC 60794-1-110:2025 defines test procedures used to establishing uniform requirements for mechanical performance - kink. It applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors. IEC 60794-1-2 gives general requirements, definitions and a complete reference guide to test methods of all types. This first edition cancels and replaces Method E10 of the first edition of IEC 60794-1-21:2015, which will be withdrawn. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: addition of "4.7"; addition of "Annex A".

  • Standard
    12 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-218:2025(Main)
Optical fibre cables - Part 1-218: Generic specification - Basic optical cable test procedures - Environmental test methods - Mid-span temperature cycling test for exposed optical units, Method F18
SIST EN IEC 60794-1-218:2025

IEC 60794-1-218:2025 defines test procedures to establish uniform requirements for the environmental performance of: - optical fibre cables for telecommunication equipment and devices employing similar techniques, and - cables having a combination of both optical fibres and electrical conductors. Throughout this document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This document defines a test standard to determine the ability of optical cable elements from a cable exposed in a mid-span entry (expressed) and stored in a pedestal, closure or similar to withstand the effects of temperature cycling by observing changes in attenuation. The optical cable element bundles up single or multiple optical fibres, e.g. loose tube, tight buffer tube, or optical fibre ribbon. See IEC 60794-1-2 for a reference guide to test methods of all types and for general requirements and definitions. This first edition partially cancels and replaces the second edition of IEC 60794-1-22 published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794‑1‑22:2017: a) extension of the test method scope to apply to any optical cables with optical cable elements including loose tubes, tight buffer tubes, and ribbons, exposed in a mid-span entry (expressed) and stored in a pedestal, closure, or similar; b) modification of the test method title according to item a); c) deletion of the tube diameter requirement for the test object; d) modification of the default temperature range according to IEC 60794-1-1; e) addition of the default coiled turns in the assembly during the test.

  • Standard
    13 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-214:2025(Main)
Optical fibre cables - Part 1-214: Generic specification - Basic optical cable test procedures - Environmental test methods - Cable UV resistance test, Method F14
SIST EN IEC 60794-1-214:2025

IEC 60794-1-214:2025 defines the test procedure used to measure the ability of cable sheath materials to maintain their integrity when exposed to ultraviolet (UV) radiation due to sunlight or fluorescent light. This first edition cancels and replaces Method F14 of the second edition of IEC 60794‑1‑22 published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794‑1‑22:2017: a) addition of subclause as regards conditioning according to ISO 4892-2 or ISO 4892-3 for indoor-outdoor cables.

  • Standard
    12 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-119:2025(Main)
Optical fibre cables - Part 1-119: Generic specification - Basic optical cable test procedures - Mechanical tests methods - Aeolian vibration, Method E19
SIST EN IEC 60794-1-119:2025

IEC 60794-1-119:2025 applies to aerial optical fibre cables such as all-dielectric self-supporting (ADSS) cables, optical ground wire (OPGW) cables, and optical phase conductor (OPPC) cables that can be exposed to aeolian vibrations. This document defines the test procedures to establish uniform mechanical performance requirements relating to aeolian vibrations. See IEC 60794‑1‑2 for general requirements and definitions and for a complete reference guide to test methods of all types. This first edition cancels and replaces test method E19 of the first edition of IEC 60794‑1‑21 published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60794‑1‑21: a) addition of a system to maintain a constant cable tension during the test as well as means to measure the free loop antinode amplitude; b) definition of the cable load which is now fixed to 25 % of the rated tensile strength for OPGW/OPPC, or to the maximum installation tension (MIT) for ADSS cables; c) addition of the target free loop peak-to-peak antinode amplitude to the procedure. The quality of the aeolian vibration motion is done through the average antinode d) addition of fatigue damage and ovality changes of the optical core to 4.5.

  • Standard
    14 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60794-1-133:2025(Main)
Optical fibre cables - Part 1-133: Generic specifications - Basic optical cable test procedures - Mechanical test methods - Multiple cable coiling and uncoiling performance, Method E33
SIST EN IEC 60794-1-133:2025

IEC 60794-1-133: 2025 defines the test procedure to demonstrate the ability of an optical fibre cable to withstand multiple coiling and uncoiling on a specified diameter of cable reel. This test is primarily intended to evaluate the performance of cables for mobile rapid or multiple deployment. See IEC 60794‑1‑2 for a reference guide to test methods of all types and for general requirements. This first edition of IEC 60794-1-133 cancels and replaces Method E33 of the second edition of the IEC 60794-1-21:2015/AMD1:2020, which will be withdrawn. It includes an editorial revision, based on the new structure and numbering system for optical fibre test methods.

  • Standard
    15 pages
    English language
    sale 10% off
    e-Library read for
    1 day