EN IEC 60794-6-20:2020

SLOVENSKI STANDARD
01-januar-2021
Optični kabli - 6-20. del: Notranji ali zunanji kabli - Skupinska specifikacija za
zunanje kable, ki zavirajo gorenje (IEC 60794-6-20:2020)
Optical fibre cables - Part 6-20: Indoor-outdoor cables - Family specification for flame
retardant outdoor cables (IEC 60794-6-20:2020)
Lichtwellenleiterkabel Teil 6-20: Innen-/Außenkabel - Familienspezifikation für
flammhemmende Außenkabel (IEC 60794-6-20:2020)
Câbles à fibres optiques - Partie 6-20: Câbles intérieurs/extérieurs - Spécification de
famille pour les câbles extérieurs retardateurs de flamme (IEC 60794-6-20:2020)
Ta slovenski standard je istoveten z: EN IEC 60794-6-20:2020
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 60794-6-20

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2020
ICS 33.180.10
English Version
Optical fibre cables - Part 6-20: Indoor-outdoor cables - Family
specification for flame retardant outdoor cables
(IEC 60794-6-20:2020)
Câbles à fibres optiques - Partie 6-20: Câbles Lichtwellenleiterkabel - Teil 6-20: Innen-/Außenkabel -
intérieurs/extérieurs - Spécification de famille pour les Familienspezifikation für flammhemmende Außenkabel
câbles extérieurs retardateurs de flamme (IEC 60794-6-20:2020)
(IEC 60794-6-20:2020)
This European Standard was approved by CENELEC on 2020-11-03. 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,
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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60794-6-20:2020 E

European foreword
The text of document 86A/2037/FDIS, future edition 1 of IEC 60794-6-20, 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 60794-6-20:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-08-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-11-03
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 60794-6-20:2020 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 standards
indicated:
IEC 60794-1-2 NOTE Harmonized as EN 60794-1-2
IEC 60794-1-219 NOTE Harmonized as EN IEC 60794-1-219

To be published. Stage at the time of publication: prEN IEC 60794-1-219:2020.
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60332-1 series Tests on electric and optical fibre cables EN 60332-1 series
under fire conditions - Part 1: Test for
vertical flame propagation for a single
insulated wire or cable
IEC 60332-3 series Tests on electric and optical fibre cables EN IEC 60332-3 series
under fire conditions - Part 3: Test for
vertical flame spread of vertically-mounted
bunched wires or cables
IEC 60754-2 - Test on gases evolved during combustion EN 60754-2 -
of materials from cables - Part 2:
Determination of acidity (by pH
measurement) and conductivity
IEC 60793-2-10 2019 Optical fibres - Part 2-10: Product EN IEC 60793-2-10 2019
specifications - Sectional specification for
category A1 multimode fibres
IEC 60793-2-50 2018 Optical fibres - Part 2-50: Product EN IEC 60793-2-50 2019
specifications - Sectional specification for
class B single-mode fibres
IEC 60794-1-1 - Optical fibre cables - Part 1-1: Generic EN 60794-1-1 -
specification - General
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 2017 Optical fibre cables - Part 1-22: Generic EN IEC 60794-1-22 2018
specification - Basic optical cable test
procedures - Environmental test methods
Publication Year Title EN/HD Year
IEC 60794-1-23 - Optical fibre cables - Part 1-23: Generic EN IEC 60794-1-23 -
specification - Basic optical cable test
procedures - Cable element test methods
IEC 60794-1-24 - Optical fibre cables - Part 1-24: Generic EN 60794-1-24 -
specification - Basic optical cable test
procedures - Electrical test methods
IEC 60794-1-31 2018 Optical fibre cables - Part 1-31: Generic EN IEC 60794-1-31 2018
specification - Optical cable elements -
Optical fibre ribbon
IEC 60794-1-215 - Optical fibre cables - Part 1-215: Generic EN IEC 60794-1-215 -
specification - Basic optical cable test
procedures - Environmental test methods -
Cable external freezing test, Method F15
IEC 60794-3 2014 Optical fibre cables - Part 3: Outdoor EN 60794-3 2015
cables - Sectional specification
IEC 60794-3-10 2015 Optical fibre cables - Part 3-10: Outdoor EN 60794-3-10 2015
cables - Family specification for duct,
directly buried and lashed aerial optical
telecommunication cables
IEC 60794-4 2018 Optical fibre cables – Part 4: Sectional EN IEC 60794-4 2018
specification - Aerial optical cables along
electrical power lines
IEC 60794-5 2014 Optical fibre cables - Part 5: Sectional EN 60794-5 2016
specification - Microduct cabling for
installation by blowing
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 60811-406 - Electric and optical fibre cables - Test EN 60811-406 -
methods for non-metallic materials - Part
406: Miscellaneous tests - Resistance to
stress cracking of polyethylene and
polypropylene compounds
IEC 61034 series Measurement of smoke density of cables EN 61034 series
burning under defined conditions
ISO 4892-2 2013 Plastics - Methods of exposure to EN ISO 4892-2 2013
laboratory light sources - Part 2: Xenon-arc
lamps
IEC 60794-6-20 ®
Edition 1.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 6-20: Indoor-outdoor cables – Family specification for flame retardant

outdoor cables
Câbles à fibres optiques –
Partie 6-20: Câbles intérieurs/extérieurs – Spécification de famille pour

les câbles extérieurs retardateurs de flamme

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-8908-2

– 2 – IEC 60794-6-20:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
4 General specifications . 7
4.1 Optical fibres . 7
4.2 Cable elements . 7
5 Specifications for flame retardant outdoor cables – Construction . 8
6 Details of family specifications and test conditions for flame retardant outdoor
cables. 8
6.1 Applicable tests . 8
6.2 Mechanical tests . 9
6.2.1 General . 9
6.2.2 Tensile performance . 10
6.2.3 Abrasion . 10
6.2.4 Crush . 11
6.2.5 Impact . 11
6.2.6 Repeated bending . 11
6.2.7 Torsion . 12
6.2.8 Bend . 12
6.2.9 Bending under tension . 12
6.2.10 Kink . 12
6.2.11 Rip cord functional test . 12
6.3 Environmental tests . 13
6.3.1 Temperature cycling . 13
6.3.2 Water penetration . 13
6.3.3 Ageing . 14
6.3.4 UV resistance . 14
6.3.5 Environmental stress cracking . 14
6.3.6 Cable external freezing . 14
6.3.7 Compound flow . 15
6.3.8 Bleeding and evaporation . 15
6.3.9 Material compatibility . 15
6.4 Cable element tests . 15
6.4.1 Ribbon strippability . 15
6.4.2 Ribbon tear (separability) . 15
6.4.3 Ribbon dimensions and geometry . 16
6.4.4 Ribbon torsion . 16
6.4.5 Ribbon residual twist . 16
6.4.6 Tube kinking .
...