SIST EN IEC 60794-1-308:2023
(Main)Optical fibre cables - Part 1-308: Generic specification - Basic optical cable test procedures - Cable element test methods - Ribbon residual twist test, method G8 (IEC 60794-1-308:2023)
Optical fibre cables - Part 1-308: Generic specification - Basic optical cable test procedures - Cable element test methods - Ribbon residual twist test, method G8 (IEC 60794-1-308:2023)
IEC 60794-1-308: 2023 describes test procedures to evaluates the degree of permanent twist in an uncabled ribbon or in a cabled optical fibre ribbon. This document applies to optical fibre ribbons in optical cables for use with telecommunication equipment and devices employing similar techniques, and to optical fibre ribbons in cables having a combination of both optical fibres and electrical conductors. This document is not applicable to partially-bonded ribbons. The method for partially-bonded ribbons is under consideration. Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. NOTE The environmental testing of optical fibre ribbon would be valuable for some applications. Useful information about suitable test methods can be found in the optical fibre standards IEC 60793-1-50, IEC 60793‑1‑51, IEC 60793‑1‑52, and IEC 60793-1-53.
Lichtwellenleiterkabel – Teil 1-308: Fachgrundspezifikation – Grundlegende Prüfverfahren für Lichtwellenleiterkabel – Prüfverfahren für Kabelelemente – Prüfung der Restverdrehung des Bandes, Verfahren G8 (IEC 60794-1-308:2023)
Câbles à fibres optiques - Partie 1-308: Spécification générique - Procédures fondamentales d'essai des câbles optiques - Méthodes d'essai des éléments de câbles - Essai de torsion résiduelle du ruban, G8 (IEC 60794-1-308:2023)
IEC 60794-1-308: 2023 décrit les procédures d'essai visant à évaluer le degré de torsion permanente dans un câble à fibres optiques en ruban relié ou non relié. Le présent document s’applique aux rubans de fibres optiques dans les câbles optiques destinés à être utilisés dans les équipements de télécommunications et les dispositifs qui utilisent des techniques similaires, ainsi qu'aux rubans de fibres optiques dans les câbles qui combinent à la fois des fibres optiques et des conducteurs électriques. Le présent document ne s’applique pas aux rubans collés partiellement. La méthode relative aux rubans collés partiellement est à l’étude. Dans tout le document, l'expression "câble optique" peut également inclure des assemblages de fibres optiques, des assemblages de fibres pour microconduits, etc. NOTE Les essais d’environnement appliqués au ruban de fibres optiques sont susceptibles d’être particulièrement utiles dans le cas de certaines applications. Des informations utiles liées aux méthodes d'essais appropriées sont fournies dans les normes relatives aux fibres optiques IEC 60793-1-50, IEC 60793‑1‑51, IEC 60793‑1‑52 et IEC 60793-1-53.
Optični kabli - 1-308. del: Splošna specifikacija - Osnovni preskusni postopki za optične kable - Preskusne metode za kabelske elemente - Preskus s preostalim zasukom ploščatega kabla, metoda G8 (IEC 60794-1-308:2023)
Standard IEC 60794-1-308: 2023 opisuje preskusne postopke za ocenjevanje stopnje stalnega zavoja v nekabelskem traku ali v kabelskem traku iz optičnih vlaken. Dokument obravnava trakove iz optičnih vlaken za uporabo s telekomunikacijsko opremo in napravami, ki uporabljajo podobne tehnike, ter trakove iz optičnih vlaken v kablih s kombinacijo optičnih vlaken in električnih vodnikov. Ta dokument se ne uporablja za delno vezane trakove. Ta metoda za delno vezane trakove je v pripravi. V dokumentu lahko izraz »optični kabel« vključuje tudi optične enote, mikrokanale itd. OPOMBA Okoljsko preskušanje traku iz optičnih vlaken je lahko koristno za nekatere vrste uporabe. Koristne informacije o ustreznih preskusnih metodah so na voljo v standardih za optična vlakna IEC 60793-1-50, IEC 60793‑1‑51, IEC 60793 in IEC 60793-1-53.
General Information
Relations
Overview
SIST EN IEC 60794-1-308:2023 is a European standard developed by CLC that specifies basic optical cable test procedures for assessing the degree of permanent twist in optical fibre ribbons used in cables. This standard focuses on the Ribbon Residual Twist Test, method G8, which evaluates the residual twisting present in both uncabled and cabled optical fibre ribbons. It applies to optical fibre ribbons utilized in telecommunications equipment as well as cables that combine optical fibres with electrical conductors. Notably, this standard excludes partially-bonded ribbons, as test methods for those are still under development.
This document is part of the IEC 60794 series, which provides generic specifications and test methods for optical fibre cables. It aligns with industry best practices to ensure reliable fibre optic cable performance by controlling mechanical stress factors such as residual twist.
Key Topics
Scope and Application
The standard is applicable to optical fibre ribbons in cables used for telecommunications and similar applications. It also covers combined optical and electrical cables but excludes partially-bonded ribbons due to ongoing method development.Test Sample Preparation
Optical fibre ribbons must be preconditioned by aging at 85 °C ± 2 °C for 30 days. Samples must be sufficiently long to include a 50 cm gauge length plus extra length for clamps and weights.Testing Apparatus Requirements
- Ribbon is clamped at the top and hung vertically, free at the bottom.
- A mass of 100 g ±5 g is attached at the bottom without causing additional twisting.
- Gauge length between clamp and weight is 50 cm ±5 cm.
- Equipment must measure axial rotation of the ribbon’s lower end relative to the upper clamp.
Test Procedure
- Precondition ribbon or cabled ribbon samples as specified.
- Mount the sample as per apparatus requirements.
- Allow ribbon to rotate freely until stable.
- Measure angular rotation between top and bottom ends.
- Calculate residual twist in degrees per centimeter using the formula:
[ T = \frac{\theta}{L} ]
where:
- T = residual twist (°/cm)
- θ = measured angle (°)
- L = gauge length (cm)
Performance Criteria
Residual twist values must meet limits specified in detail specifications. Typically, a maximum residual twist of 8°/cm is considered acceptable.Reference and Supporting Standards
The standard refers to IEC 60794-1-2 for general testing guidance. It also notes environmental testing standards IEC 60793-1-50 through IEC 60793-1-53 for additional fibre testing methods.
Applications
Optical Fibre Cable Manufacturing
SIST EN IEC 60794-1-308:2023 guides manufacturers in quality control by providing standardized methods to evaluate mechanical integrity related to twisting stresses in fibre ribbons, which impact cable reliability and performance.Telecommunications Industry
Ensures optical fibre ribbons used in telecommunication cables meet stringent mechanical twisting limits, which minimizes signal degradation and physical damage risks during installation and operation.Research and Development
Provides a baseline test method for engineers and developers working on new cable designs, particularly where combining optical fibres with electrical conductors.Quality Assurance and Compliance
Enables certification bodies and cable installers to verify that products comply with international standards, ensuring consistent product quality and interoperability.
Related Standards
IEC 60794-1-2: Generic specification covering basic optical cable test procedures and general guidance, forming a fundamental reference for this and related test methods.
IEC 60794-1-23:2019: The prior comprehensive document partially superseded by SIST EN IEC 60794-1-308:2023, which reorganized cable element test methods into individual documents.
IEC 60793 Series (1-50 to 1-53): Pertains to environmental and mechanical testing of optical fibres themselves, providing complementary tests for fibre strength and durability.
Other IEC 60794 Part 1-3xx Standards: These include specific individual cable element test methods, enhancing modular approach for optical cable testing.
SIST EN IEC 60794-1-308:2023 strengthens the standardization framework for optical fibre cable testing by delivering a clear, replicable procedure to measure ribbon residual twist. This ensures that optical fibre ribbons maintain structural and optical integrity, enhancing cable longevity and performance in the demanding fields of telecommunications and beyond.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2023
Optični kabli - 1-308. del: Splošna specifikacija - Osnovni preskusni postopki za
optične kable - Preskusne metode za kabelske elemente - Preskus s preostalim
zasukom ploščatega kabla, metoda G8 (IEC 60794-1-308:2023)
Optical fibre cables - Part 1-308: Generic specification - Basic optical cable test
procedures - Cable element test methods - Ribbon residual twist test, method G8 (IEC
60794-1-308:2023)
Lichtwellenleiterkabel – Teil 1-308: Fachgrundspezifikation – Grundlegende
Prüfverfahren für Lichtwellenleiterkabel – Prüfverfahren für Kabelelemente – Prüfung der
Restverdrehung des Bandes, Verfahren G8 (IEC 60794-1-308:2023)
Câbles à fibres optiques - Partie 1-308: Spécification générique - Procédures
fondamentales d'essai des câbles optiques - Méthodes d'essai des éléments de câbles -
Essai de torsion résiduelle du ruban, G8 (IEC 60794-1-308:2023)
Ta slovenski standard je istoveten z: EN IEC 60794-1-308:2023
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 60794-1-308
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2023
ICS 33.180.10 Supersedes EN IEC 60794-1-23:2019 (partially)
English Version
Optical fibre cables - Part 1-308: Generic specification - Basic
optical cable test procedures - Cable element test methods -
Ribbon residual twist test, method G8
(IEC 60794-1-308:2023)
Câbles à fibres optiques - Partie 1-308: Spécification Lichtwellenleiterkabel - Teil 1-308: Fachgrundspezifikation -
générique - Procédures fondamentales d'essais des câbles Grundlegende Prüfverfahren für Lichtwellenleiterkabel -
optiques - Méthodes d'essai des éléments de câbles - Essai Prüfverfahren für Kabelelemente - Prüfung der
de torsion résiduelle du ruban, méthode G8 Restverdrehung des Bandes, Verfahren G8
(IEC 60794-1-308:2023) (IEC 60794-1-308:2023)
This European Standard was approved by CENELEC on 2023-03-17. 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-1-308:2023 E
European foreword
The text of document 86A/2272/FDIS, future edition 1 of IEC 60794-1-308, 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 60794-1-308:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-12-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-03-17
document have to be withdrawn
This document partially supersedes EN IEC 60794-1-23:2019 and all of its amendments and
corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60794-1-308:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60793-1-50 NOTE Approved as EN 60793-1-50
IEC 60793-1-51 NOTE Approved as EN 60793-1-51
IEC 60793-1-52 NOTE Approved as EN 60793-1-52
IEC 60793-1-53 NOTE Approved as EN 60793-1-53
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 60794-1-2 - Optical fibre cables - Part 1-2: Generic EN IEC 60794-1-2 -
specification - Basic optical cable test
procedures - General guidance
IEC 60794-1-308 ®
Edition 1.0 2023-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-308: Generic specification – Basic optical cable test procedures – Cable
element test methods – Ribbon residual twist test, method G8
Câbles à fibres optiques –
Partie 1-308: Spécification générique – Procédures fondamentales d'essais des
câbles optiques – Méthodes d'essais des éléments de câbles – Essai de torsion
résiduelle du ruban, méthode G8
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6471-3
– 2 – IEC 60794-1-308:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 Sample . 7
6 Apparatus . 7
7 Procedure . 7
8 Requirements . 8
9 Details to be specified . 8
Bibliography . 9
IEC 60794-1-308:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-308: Generic specification – Basic optical cable test procedures –
Cable element test methods – Ribbon residual twist test, method G8
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 deal
...
Frequently Asked Questions
SIST EN IEC 60794-1-308:2023 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Optical fibre cables - Part 1-308: Generic specification - Basic optical cable test procedures - Cable element test methods - Ribbon residual twist test, method G8 (IEC 60794-1-308:2023)". This standard covers: IEC 60794-1-308: 2023 describes test procedures to evaluates the degree of permanent twist in an uncabled ribbon or in a cabled optical fibre ribbon. This document applies to optical fibre ribbons in optical cables for use with telecommunication equipment and devices employing similar techniques, and to optical fibre ribbons in cables having a combination of both optical fibres and electrical conductors. This document is not applicable to partially-bonded ribbons. The method for partially-bonded ribbons is under consideration. Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. <em>NOTE The environmental testing of optical fibre ribbon would be valuable for some applications. Useful information about suitable test methods can be found in the optical fibre standards IEC 60793-1-50, IEC 60793‑1‑51, IEC 60793</em><em>‑1</em><em>‑52, and IEC 60793-1-53.</em>
IEC 60794-1-308: 2023 describes test procedures to evaluates the degree of permanent twist in an uncabled ribbon or in a cabled optical fibre ribbon. This document applies to optical fibre ribbons in optical cables for use with telecommunication equipment and devices employing similar techniques, and to optical fibre ribbons in cables having a combination of both optical fibres and electrical conductors. This document is not applicable to partially-bonded ribbons. The method for partially-bonded ribbons is under consideration. Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. <em>NOTE The environmental testing of optical fibre ribbon would be valuable for some applications. Useful information about suitable test methods can be found in the optical fibre standards IEC 60793-1-50, IEC 60793‑1‑51, IEC 60793</em><em>‑1</em><em>‑52, and IEC 60793-1-53.</em>
SIST EN IEC 60794-1-308:2023 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.
SIST EN IEC 60794-1-308:2023 has the following relationships with other standards: It is inter standard links to SIST EN IEC 60794-1-23:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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