EN IEC 60794-1-208:2025
(Main)Optical fibre cables - Part 1-208: Generic specification - Basic optical cable test procedures - Environmental test methods - Pneumatic resistance, Method F8
Optical fibre cables - Part 1-208: Generic specification - Basic optical cable test procedures - Environmental test methods - Pneumatic resistance, Method F8
IEC 60794-208:2025 describes test procedures to be used in establishing uniform requirements for optical fibre cables for the pneumatic resistance environmental property, for unfilled cables which are protected by gas pressurization. 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. NOTE Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This first edition of IEC 60794‑1‑208 cancels and replaces method F8 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) the form of the formula for pneumatic resistance is modified for ease of calculation with test pressures other than 62 kPa; b) details to be reported are added.
Lichtwellenleiterkabel - Teil 1-208: Fachgrundspezifikation - Grundlegende Prüfverfahren für Lichtwellenleiterkabel - Umweltprüfverfahren - Pneumatische Beständigkeit, Verfahren F8
Câbles à fibres optiques - Partie 1-208: Spécification générique - Procédures fondamentales d’essais des câbles optiques - Méthodes d’essais d'environnement - Résistance pneumatique, Méthode F8
IEC 60794-208: 2025 décrit les procédures d’essai à utiliser afin d'établir des exigences uniformes relatives aux câbles à fibres optiques pour ce qui concerne la caractéristique dans l'environnement de la résistance pneumatique, applicable aux câbles non remplis protégés par pression gazeuse. Le présent document s’applique aux câbles à fibres optiques destinés à être utilisés dans les équipements de télécommunications et les dispositifs utilisant des techniques analogues, ainsi qu'aux câbles constitués de fibres optiques d'une part et de conducteurs électriques d'autre part.NOTE Dans tout le document, l'expression "câble optique" peut également inclure des assemblages de fibres optiques, des assemblages de fibres en microconduits, etc. Cette première édition de l'IEC 60794‑1‑208 annule et remplace la méthode F8 de la deuxième édition de l'IEC 60794‑1‑22 parue en 2017. Cette édition constitue une révision technique.Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) la présentation de la formule relative à la résistance pneumatique est modifiée pour faciliter le calcul comportant des pressions d'essai distinctes de la valeur 62 kPa; b) des Informations détaillées à consigner ont été ajoutées.
Optični kabli - 1-208. del: Splošna specifikacija - Osnovni preskusni postopki za optične kable - Okoljske preskusne metode - Pnevmatska odpornost, metoda F8 (IEC 60794-1-208:2025)
Ta del standarda IEC 60794 opisuje preskusne postopke, ki jih je treba uporabljati pri določanju enotnih zahtev za optične kable v zvezi z okoljsko lastnostjo pnevmatske odpornosti nepolnjenih kablov, zaščitenih s plinskim tlakom.
Ta dokument se uporablja za optične kable za uporabo s telekomunikacijsko opremo in napravami, ki uporabljajo podobne tehnike, ter kable s kombinacijo optičnih vlaken in električnih vodnikov.
OPOMBA: V tem dokumentu lahko besedna zveza »optični kabel« zajema tudi optične enote, mikrokanale itd.
General Information
- Status
- Published
- Publication Date
- 05-Jun-2025
- Technical Committee
- CLC/TC 86A - Optical fibres and optical fibre cables
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 06-Jun-2025
- Due Date
- 24-Jan-2025
- Completion Date
- 06-Jun-2025
Relations
- Effective Date
- 20-May-2025
Overview
EN IEC 60794-1-208:2025 is an international standard specifying basic test procedures for optical fibre cables, focusing on the environmental assessment of pneumatic resistance using Method F8. This standard applies specifically to unfilled optical fibre cables protected by gas pressurization, which are commonly used in telecommunication equipment and hybrid cables combining optical fibres with electrical conductors.
This 2025 revision replaces the F8 pneumatic resistance method previously defined in IEC 60794-1-22:2017, introducing technical updates that simplify calculation formulas for pneumatic resistance at varying test pressures and enhance reporting requirements for clearer test documentation.
Key Topics
Scope and Application
EN IEC 60794-1-208:2025 covers test procedures for evaluating the resistance to gas flow within optical fibre cables that rely on pressurization for protection. It is applicable to cables used in telecom and similar industries, including microduct fibre units and fibre optic units.Test Method F8: Pneumatic Resistance
The primary focus is on measuring the pneumatic resistance of cables to ensure effective gas pressurization. Measurements are conducted by passing regulated dry air through the cable sample and recording flow rates at a specified pressure, typically 62 kPa ± 2%.Test Apparatus and Procedure
Required equipment includes:- Pneumatic pressure supply with regulation capability
- Flow meter calibrated to ±10%
- Barometer for atmospheric pressure measurement
- Thermometer for ambient temperature
The test involves connecting one end of the cable to a regulated dry air source at +20°C and measuring air flow through the cable with the other end open to the atmosphere. The pneumatic resistance is calculated based on air flow rate, cable length, and applied pressure.
Calculation and Formula
Pneumatic resistance (R) is calculated using the formula:[ R = \frac{60 \times P}{L \times f^3} ]
where
- P = test pressure in kPa,
- L = cable length in meters,
- f = air flow rate in cubic meters per second.
Requirements and Reporting
Test results must meet maximum pneumatic resistance limits defined in project-specific detail specifications. Both airflow directions are tested. Test reports should include:- Cable type and sample description
- Pneumatic resistance values for both directions
- Sample length and test pressure
Applications
Telecommunications Industry
Ensures optical fibre cables designed for gas pressurization maintain proper pneumatic seals against environmental exposure, protecting optical fibres and enhancing system longevity.Cable Manufacturing and Quality Control
Assists manufacturers in verifying cable integrity and compliance with environmental resistance specifications before commercial deployment or installation.Hybrid Cable Systems
Relevant for cables combining fibre optics and electrical conductors where gas pressurization provides an essential environmental barrier.Field Testing and Maintenance
Provides standardized methods to assess cable pneumatic resistance in the field, supporting preventive maintenance and system reliability.
Related Standards
IEC 60794-1-2: Generic specification providing general guidance on basic optical cable test procedures, serving as a foundational reference for methods like F8.
IEC 60794 Series: A comprehensive family of standards covering physical and environmental test methods for optical fibre cables.
ISO/IEC Directives: Guidelines for developing consistent international standards, referenced during the preparation and revision of EN IEC 60794-1-208:2025.
Summary
EN IEC 60794-1-208:2025 delivers a uniform, internationally recognized methodology for testing the pneumatic resistance of unfilled, gas-pressurized optical fibre cables. By standardizing how pneumatic resistance is measured and reported, this standard supports manufacturers and operators in ensuring network reliability, cable durability, and system performance in challenging environments. Incorporating this standard into cable testing workflows enhances quality assurance and promotes compatibility across telecommunication systems worldwide.
Frequently Asked Questions
EN IEC 60794-1-208:2025 is a standard published by CLC. Its full title is "Optical fibre cables - Part 1-208: Generic specification - Basic optical cable test procedures - Environmental test methods - Pneumatic resistance, Method F8". This standard covers: IEC 60794-208:2025 describes test procedures to be used in establishing uniform requirements for optical fibre cables for the pneumatic resistance environmental property, for unfilled cables which are protected by gas pressurization. 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. NOTE Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This first edition of IEC 60794‑1‑208 cancels and replaces method F8 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) the form of the formula for pneumatic resistance is modified for ease of calculation with test pressures other than 62 kPa; b) details to be reported are added.
IEC 60794-208:2025 describes test procedures to be used in establishing uniform requirements for optical fibre cables for the pneumatic resistance environmental property, for unfilled cables which are protected by gas pressurization. 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. NOTE Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc. This first edition of IEC 60794‑1‑208 cancels and replaces method F8 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) the form of the formula for pneumatic resistance is modified for ease of calculation with test pressures other than 62 kPa; b) details to be reported are added.
EN IEC 60794-1-208:2025 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 60794-1-208:2025 has the following relationships with other standards: It is inter standard links to EN IEC 60794-1-22:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN IEC 60794-1-208:2025 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-julij-2025
Nadomešča:
SIST EN IEC 60794-1-22:2018
Optični kabli - 1-208. del: Splošna specifikacija - Osnovni preskusni postopki za
optične kable - Okoljske preskusne metode - Pnevmatska odpornost, metoda F8
(IEC 60794-1-208:2025)
Optical fibre cables - Part 1-208: Generic specification - Basic optical cable test
procedures - Environmental test methods - Pneumatic resistance, Method F8 (IEC
60794-1-208:2025)
Lichtwellenleiterkabel - Teil 1-208: Fachgrundspezifikation - Grundlegende Prüfverfahren
für Lichtwellenleiterkabel - Umweltprüfverfahren - Pneumatische Beständigkeit,
Verfahren F8 (IEC 60794-1-208:2025)
Câbles à fibres optiques - Partie 1-208: Spécification générique - Procédures
fondamentales d’essais des câbles optiques - Méthodes d’essais d'environnement -
Résistance pneumatique, méthode f8 (IEC 60794-1-208:2025)
Ta slovenski standard je istoveten z: EN IEC 60794-1-208:2025
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 60794-1-208
NORME EUROPÉENNE
EUROPÄISCHE NORM June 2025
ICS 33.180.10 Supersedes EN IEC 60794-1-22:2018 (partially)
English Version
Optical fibre cables - Part 1-208: Generic specification - Basic
optical cable test procedures - Environmental test methods -
Pneumatic resistance, Method F8
(IEC 60794-1-208:2025)
Câbles à fibres optiques - Partie 1-208: Spécification Lichtwellenleiterkabel - Teil 1-208: Fachgrundspezifikation -
générique - Procédures fondamentales d'essais des câbles Grundlegende Prüfverfahren für Lichtwellenleiterkabel -
optiques - Méthodes d'essais d'environnement - Résistance Umweltprüfverfahren - Pneumatische Beständigkeit,
pneumatique, Méthode F8 Verfahren F8
(IEC 60794-1-208:2025) (IEC 60794-1-208:2025)
This European Standard was approved by CENELEC on 2025-05-28. 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-1-208:2025 E
European foreword
The text of document 86A/2539/FDIS, future edition 1 of IEC 60794-1-208, 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 60794-1-208:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-06-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-06-30
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.
This document partially supersedes EN IEC 60794-1-22:2018.
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 60794-1-208:2025 was approved by CENELEC as a
European Standard without any modification.
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 60794-1-208 ®
Edition 1.0 2025-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibre cables –
Part 1-208: Generic specification – Basic optical cable test procedures –
Environmental test methods – Pneumatic resistance, Method F8
Câbles à fibres optiques –
Partie 1-208: Spécification générique – Procédures fondamentales d’essais des
câbles optiques – Méthodes d’essais d'environnement – Résistance
pneumatique, Méthode F8
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8327-0360-1
– 2 – IEC 60794-1-208:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements. 6
5 Method F8: Pneumatic resistance . 6
5.1 Object . 6
5.2 Sample . 7
5.3 Apparatus . 7
5.4 Procedure . 7
5.5 Requirements . 7
5.6 Details to be specified . 7
5.7 Details to be reported . 8
IEC 60794-1-208:2025 © IEC 2025 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 1-208: Generic specification – Basic optical cable test procedures –
Environmental test methods – Pneumatic resistance, Method F8
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 referr
...
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