IEC 60794-3-70:2016

IEC 60794-3-70 ®
Edition 1.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables
for rapid/multiple deployment
Câbles à fibres optiques –
Partie 3-70: Câbles extérieurs – Spécification de famille pour câbles à fibres
optiques extérieurs pour déploiement rapide/multiple

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IEC 60794-3-70 ®
Edition 1.0 2016-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-70: Outdoor cables – Family specification for outdoor optical fibre cables

for rapid/multiple deployment
Câbles à fibres optiques –
Partie 3-70: Câbles extérieurs – Spécification de famille pour câbles à fibres

optiques extérieurs pour déploiement rapide/multiple

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01 ; 33.180.10 ISBN 978-2-8322-3156-2

– 2 – IEC 60794-3-70:2016 © IEC 2016
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 General requirements . 5
4 Specification for outdoor optical fibre cables for rapid/multiple deployment . 6
4.1 Construction . 6
4.1.1 General . 6
4.1.2 Rapid/multiple deployment optical fibre cables . 6
4.2 Optical fibres. 7
4.3 Secondary coating . 7
4.4 Outer sheath . 7
4.5 Mechanical and environmental tests . 7
5 Testing of rapid/multiple deployment optical fibre cables . 7
5.1 General . 7
5.2 Applicable tests . 8
5.3 Tensile performance . 8
5.4 Abrasion . 9
5.5 Crush . 9
5.6 Impact . 9
5.7 Ribbon strippability . 10
5.8 Repeated bending . 10
5.9 Torsion . 10
5.10 Flexing . 10
5.11 Kink . 11
5.12 Bend . 11
5.13 Bending under tension. 11
5.14 Temperature cycling . 11
5.15 Water penetration . 12
5.16 Ageing . 12
5.17 UV resistance . 12
5.18 External freezing . 12
5.19 Fibre ribbon separability . 13
5.20 Tube kinking . 13
Annex A (normative) Blank detail specification and minimum requirements . 14
Bibliography . 15

Table 1 – Tests applicable for mechanical and environmental performance of a
rapid/multiple deployment optical fibre cable . 8
Table A.1 – Cable description . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables –
Family specification for outdoor optical
fibre cables for rapid/multiple deployment

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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60794-3-70 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This International Standard is to be used in conjunction with IEC 60794-1-1, IEC 60794-1-2
and IEC 60794-3.
The text of this standard is based on the following documents:
FDIS Report on voting
86A/1692/FDIS 86A/1708/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – IEC 60794-3-70:2016 © IEC 2016
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all 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 publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
OPTICAL FIBRE CABLES –
Part 3-70: Outdoor cables –
Family specification for outdoor optical
fibre cables for rapid/multiple deployment

1 Scope
This part of IEC 60794 is a family specification that covers outdoor optical fibre cables
intended for rugged terrestrial rapid/multiple deployment. These cables, with enhanced
mechanical, environmental and ingress performance may be used wherever a rapid or
multiple deployment is relevant (e.g. mobile broadcast units, emergency rescue services,
outdoor motion-robotics, etc.).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60793-2-10:2011, Optical fibres – Part 2-10, Product specifications – Sectional
specification for category A1 multimode fibres
IEC 60793-2-50:2012, Optical fibres – Part 2-50, Product specifications – Sectional
specification for class B single-mode fibres
IEC 60794-1-1, Optical fibre cables – Part 1-1: Generic specification – General
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Cross reference table
for optical cable test procedures
IEC 60794-1-21, Optical fibre cables – Part 1-21: Generic specification – Basic optical cable
test procedures – Mechanical tests methods
IEC 60794-1-22, Optical fibre cables – Part 1-22: Generic specification – Basic optical cable
test procedures – Environmental tests methods
IEC 60794-1-23, Optical fibre cables – Part 1-23: Generic specification – Basic optical cable
test procedures – Cable element test methods
IEC 60794-3, Optical fibre cables – Part 3: Outdoor cables – Sectional specification
ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc
lamps
3 General requirements
The cable shall comply with the sectional specification, IEC 60794-3, and meet the
requirements which are defined in it.

– 6 – IEC 60794-3-70:2016 © IEC 2016
The optical fibre contained in cables covered by this standard shall comply with one of the
following standards, and meet the normative requirements defined within them as applicable:
• IEC 60793-2-50:2012, Annex A (Single-mode fibre category B1.1);
• IEC 60793-2-50:2012, Annex C (Single-mode fibre category B1.3);
• IEC 60793-2-50:2012, Annex G (Single-mode fibre sub-categories B6_a1 and B6_a2);
• IEC 60793-2-10:2011, Annex A (Multimode fibre sub-category A1a, 50 µm core
diameter);
• IEC 60793-2-10:2011, Annex B (Multimode fibre sub-category A1b, 62,5 µm core
diameter).
To enable compatibility with ISO/IEC 11801and ISO/IEC 24702, optical performance level
requirements are presented in terms of the performance classification codes as follows:
• OS1 Single-mode fibre, B1.1, B1.3, B6_a1 or B6_a2
• OS2 Single-mode fibre, B1.3, B6_a1 or B6_a2
• OM1 Multimode fibre, A1a or A1b
• OM2 Multimode fibre, A1a or A1b
• OM3 Multimode fibre, A1a.2
• OM4 Multimode fibre, A1a.3
NOTE These codes are informative from the perspective of the requirements defined in this detailed specification.
4 Specification for outdoor optical fibre cables for rapid/multiple deployment
4.1 Construction
4.1.1 General
In addition to the construction requirements of IEC 60794-3, where applicable, the following
considerations apply to outdoor optical fibre cables for rapid/multiple deployment.
Rapid/multiple deployment optical fibre cables are designed to be used in un-protected
outdoor terrestrial environments thereby requiring enhanced mechanical, environmental and
ingress performance.
4.1.2 Rapid/multiple deployment optical fibre cables
Rapid/multiple deployment optical fibre cables are suitable for use by manual or mechanically
assisted deployment. They are differentiated from other outdoor optical fibre cables due to:
• repeated deployment/installation;
• unprotected working environment;
• often stored in relatively small diameter drums;
• uncontrolled or non-regulated cable route.
All the above, as well as additional factors require these cables to have enhanced mechanical
(i.e. tensile, crush, bend radius, torsion, abrasion, kink, memory) environmental (i.e.
temperature, UV resistance, cold-bend) and ingress (i.e. fuel, solvent and oil resistance,
waterblocking) performance over the cable's lifetime. These are to be incorporated into the
cable's design.
4.2 Optical fibres
For the purposes of this standard, supported optical fibres are those detailed in Clause 3.
There shall be no fibre splice in a delivered length unless otherwise agreed by customer and
supplier.
It shall be possible to identify each individual fibre throughout the length of the cable.
Transmission performance of the cabled optical fibres shall be in accordance with
IEC 60794-1-1.
4.3 Secondary coating
Although the different recognized secondary coatings detailed in IEC 60794-3 (tight buffer,
tube, ribbon, slotted core etc.) are supported by this standard, the type of secondary coating,
materials and dimensions shall be as required by the cable detail specification.
NOTE Both laboratory testing as well as field use have demonstrated the tight buffer to be most optimized to meet
all the relevant performance test requirements detailed in Clause 5 of this standard.
4.4 Outer sheath
The cable shall have a seamless sheath made of a UV-stabilised weather-resistant polymeric
compound, unless otherwise agreed between the customer and supplier.
The sheath thickness and cable overall diameter and its variations shall take into account the
operating conditions and shall be determined by agreement between the customer and
supplier.
4.5 Mechanical and environmental tests
Based on the expected operating conditions over the life of the product, including the
mechanical loads exerted on the product during deployment and operation, the following
sections specify product performance for rapid/multiple deployment optical fibre cables.
Unless otherwise specified, the installation temperature range shall be: -40 ºC to +70 ºC.
5 Testing of rapid/multiple deployment optical fibre cables
5.1 General
Some of the tests detailed in Table 1 below may not be applicable to certain cable designs
and intended applications. For further guidance on the applicability of test methods and
frequency of testing, see IEC 60794-1-1.
Tests on single-mode fibre cables are typically carried out at 1 550 nm. Multimode fibre
cables are typically tested at 1 300 nm. Measurements at other wavelengths or range of
wavelengths can be agreed upon between the customer and supplier.

– 8 – IEC 60794-3-70:2016 © IEC 2016
5.2 Applicable tests
See Table 1.
Table 1 – Tests applicable for mechanical and environmental performance
of a rapid/multiple deployment optical fibre cable
Characteristic Family Test Method Remark
Requirement
Tensile performance 5.3 IEC 60794-1-21
Method E1
Abrasion 5.4 IEC 60794-1-21
Method E2A
Crush 5.5 IEC 60794-1-21
Method E3
Impact 5.6 IEC 60794-1-21
Method E4
Ribbon stripping 5.7 IEC 60794-1-21 if ribbons are used
Method E5B
Repeated bending 5.8 IEC 60794-1-21
Method E6
Torsion 5.9 IEC 60794-1-21
Method E7
Flexing 5.10 IEC 60794-1-21
Method E8
Kink 5.11 IEC 60794-1-21
Method E10
Bend 5.12 IEC 60794-1-21
Method E11A
Bending under Tension 5.13 IEC 60794-1-21
Method E18A
Temperature cycling 5.14 IEC 60794-1-22
Method F1
Water penetration 5.15 IEC 60794-1-22
Method F5B
Ageing 5.16 IEC 60794-1-22
Method F9
UV resistance 5.17 IEC 60794-1-22
Method F14
External freezing 5.18 IEC 60794-1-22
Method F15
Separability of individual 5.19 IEC 60794-1-23 if ribbons are used
fibres from ribbon Method G5
Tube kinking 5.20 IEC 60794-1-23 if loose tubes are
Method G7 used
Fuel solvent resistance  IEC 60811-404 may
be applicable
5.3 Tensile performance
a) Family requirements
For some of the parameters specified, the objective is a level of strain that will not
compromise fibre mechanical reliability. For 1 % proof-tested fibres, the fibre strain under long
term tensile load (T ) shall not exceed 20 % of this fibre proof strain (equal to absolute 0,2 %
L
strain) and there shall be no change in attenuation during the test. Under short term tensile
load (T ) the fibre strain shall not exceed 60% of the fibre proof strain and the attenuation
M
change during test shall be measured and recorded. Other criteria may be agreed between
the customer and the supplier. For fibres proof tested at higher levels the safe long-term load
will not scale linearly with proof strain, so a lower percentage of the proof strain is applicable.
For greater than 1 % up to 2 % proof-tested fibres, fibre strain at T shall be limited to 17 % of
L
the proof-test strain (equal to absolute 0,34 % strain for 2 % proof tested fibres).
b) Test conditions
Method: IEC 60794-1-21, Method E1
Tensile short-term load on cable: 2 700 N or 1 × the weight of 1,0 km length of cable in N,
the larger of the two.
NOTE Other tensile loads can be agreed between customer and supplier.
5.4 Abrasion
a) Family requirements
There shall be no perforation of the sheath after performing 100 cycles. Other criteria may be
agreed between customer and supplier.
b) Test conditions
Method: IEC 60794-1-21, Method E2A
Applied force: 7 N
Diameter of needle: 0,5 mm
5.5 Crush
a) Family requirements
After removal of the short-term load, there shall be no change in attenuation. Under visual
examination, there shall be no damage to the sheath or to the cable elements. The imprint of
the plate or mandrel on the cable is not considered mechanical damage.
b) Test conditions
Method: IEC 60794-1-21, Method E3A
Short-term Load (plate/plate): 8 000 N
Duration of load: 1 min
NOTE Other compression loads can be agreed between customer and supplier.
5.6 Impact
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath or to
the cable elements. The imprint of the striking surface on the sheath is not considered
mechanical damage.
b) Test conditions
Method: IEC 60794-1-21, Method E4
Number of impacts: One in 3 different places spaced not less than 500 mm
apart
Striking surface curvature radius: 300 mm
Impact energy: 22 J
NOTE Other impact energies greater than 10 J can be agreed between customer and supplier.

– 10 – IEC 60794-3-70:2016 © IEC 2016
5.7 Ribbon strippability
a) Family requirements
At least 25 mm of the ribbon matrix and the fibres’ protective coatings shall be removable with
commercially available stripping tools with no fibre breakage. Any remaining coating residue
shall be readily removable using isopropyl alcohol wipes.
b) Test conditions
Method: IEC 60794-1-21, Method E5B
5.8 Repeated bending
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath and to
the cable elements.
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, Method E6
Bending diameter: 10 × d
Load: Adequate to ensure uniform contact with the mandrel
Number of cycles: 10 000
5.9 Torsion
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath or to
the cable elements.
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, Method E7
Length under test: 125 × d
Number of cycles: 1 000
NOTE Other lengths can be agreed between customer and supplier.
5.10 Flexing
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath or to
the cable elements.
There shall be no change in attenuation after the test.
b) Test conditions
Method: IEC 60794-1-21, Method E8
Number of cycles: 10 000
Diameter of pulleys A and B: 20 × d
Carriage speed: 1,0 m/s
Mass of weights: Adequate enough to ensure uniform contact with pulleys

NOTE Test details mass of weights, acceleration and deceleration of the carriage, traverse length of the carriage
and minimal distance of pulleys A and B to the nearest fixed pulley can be agreed between supplier and customer.
5.11 Kink
a) Family requirements
No kink shall occur at diameters greater than the specified minimum.
b) Test conditions
Method: IEC 60794-1-21, Method E10
Minimum diameter: 10 × d
5.12 Bend
a) Family requirements
There shall be no change in attenuation after the test.
The change in attenuation during the test shall be ≤ 0,2 dB for single-mode fibre and ≤ 0,4 dB
for multimode fibre.
b) Test conditions
Method: IEC 60794-1-21, Method E11A
Temperature Ambient
Diameter of mandrel: 10 × d
Number of turns/helix: 4
Number of cycles: 3
NOTE Other temperatures can be agreed between customer and supplier.
5.13 Bending under tension
a) Family requirements
Under visual examination without magnification there shall be no damage to the sheath nor to
the cable elements.
The permanent increase in attenuation after the test shall be ≤ 0,2 dB for single-mode fibre
and ≤ 0,4 dB for multimode fibre.
b) Test conditions
Method: IEC 60794-1-21, Method E18A, Procedure 1
Diameter of mandrel: 10 × d
Tension: 500 N
Number of moving cycles: 10
5.14 Temperature cycling
a) Family requirements
Attenuation measurements shall be taken during the last cycle.
For T to T the change in the attenuation coefficient shall be:
A1 B1
• ≤ 0,2 dB/km for single-mode fibre and shall be reversible to measurement uncertainty
when measured in the 1 550 nm region

– 12 – IEC 60794-3-70:2016 © IEC 2016
• ≤ 0,4 dB/km for multimode fibre and shall be reversible to measurement uncertainty when
measured in the 1 300 nm region.
For T to T , the change in attenuation coefficient shall be:
A2 B2
• ≤ 0,3 dB/km for single-mode fibre and shall be reversible to measurement uncertainty
when measured in the 1 550 nm region.
• ≤ 0,5 dB/km for multimode fibre and shall be reversible to measurement uncertainty when
measured in the 1 300 nm region.
b) Test conditions
Method: IEC 60794-1-22, Method F1.
Sample length under test: Finished cable, length of at least 1 000 m.
High temperature, T : +70 °C to +85 °C, depending on customer requirements.
B2
: +60 °C to +70 °C depending on customer requirements.
High temperature, T
B1
Low temperature, T : –40 °C.
A1
Low temperature, T : T to –60 °C depending on customer requirements
A2 A1
Number of cycles: 2
NOTE Other temperature values corresponding to specific climate conditions can be agreed between supplier and
customer. If, due to intended application length a shorter cable sample is agreed between supplier and customer,
this length will be sufficient to ensure accurate, repeatable test results as per the dynamic range and resolution of
the optical test equipment.
5.15 Water penetration
a) Family requirements
The cable shall not propagate water longitudinally according to requirements of
IEC 60794-1-22, Method F5B or F5C as applicable.
b) Test conditions
Method: IEC 60794-1-22, Method F5B/F5C as applicable
5.16 Ageing
a) Family requirements
No change in optical transmittance after the test.
b) Test conditions
Method: IEC 60794-1-22, Method F9
5.17 UV resistance
a) Family requirements
After exposure, the average tensile and elongation of the test specimens from the outer
sheath shall be a minimum of 80 % of the original value.
b) Test conditions
Method: IEC 60794-1-22, Method F14 and ISO 4892-2
5.18 External freezing
Method: IEC 60794-1-22, Method F15
Sample length: ≥ 50 m
NOTE It is assumed that a cable intended for outdoor use meets the external freezing requirements above,
however, supplier and customer can agree to forego this test if deemed irrelevant to the intended application.

5.19 Fibre ribbon separability
a) Family requirements
Maximum tear force: 4,4 N
b) Test conditions
Method: IEC 60794-1-23, Method G5
5.20 Tube kinking
a) Family requirements
During the test no kinking of the sample shall be visible.
b) Test conditions
Method: IEC 60794-1-23 Method G7
L: 60 mm
L1: 350 mm
L2: 175 mm
Cycles: 10
NOTE Alternatively, L2 can be set as 100mm and the moving length L can be extended beyond 60mm in order to
achieve the equivalent loop diameter.

– 14 – IEC 60794-3-70:2016 © IEC 2016
Annex A
(normative)
Blank detail specification and minimum requirements

See Table A.1 for the cable description.
Table A.1 – Cable description
(1) Prepared by (2) Document No:
Issue:
Date:
(3) Available from: (4) Generic specifications: IEC 60794-1-1 and IEC 60794-1-2
Sectional specification: IEC 60794-3
Family specification: IEC 60794-3-70
(5) Additional references:
(6) Rapid/multiple deployment optical fibre cable description:
(7) Rapid/multiple deployment optical fibre cable construction:
Optical fibre type (as per IEC 60793-2) Additional remarks
Total fibre count
Secondary coating construction
Secondary coating material
Secondary coating dimensions
Strength member material
Cable core construction
Sheath material
Sheath dimensions
Additional armouring (Optional)
– Non-metallic armouring
– Metallic armouring
Additional outer sheath (Optional)
Marking identification
– Customer requirement
– Identification of manufacturer
(8) Application information:
Maximum outer diameter (d) mm
Rated maximum tensile load N
Minimum bending radius for no-load bending mm or n × d
Minimum bending radius for rated-load bending
mm or n × d
Temperature range:
– Transport and storage
ºC
– Installation
ºC
– Operation
ºC
Length Marking on outer sheath

– Typical
m
– Accuracy
-0 /+ 1 %
Bibliography
IEC 60304, Standard colours for insulation for low-frequency cables and wires
IEC 60793-1-40, Optical fibres – Part 1-40, Measurement methods and test procedures –
Attenuation
IEC 60811-404, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 404: Miscellaneous tests – Mineral oil immersion tests for sheaths
ISO/IEC 11801, Information technology − Generic cabling for customer premises
ISO/IEC 24702, Information technology – Generic cabling – Industrial premises

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– 16 – IEC 60794-3-70:2016 © IEC 2016
SOMMAIRE
AVANT-PROPOS . 17
1 Domaine d’application. 19
2 Références normatives . 19
3 Exigences générales. 20
4 Spécification pour câbles à fibres optiques extérieurs pour déploiement
rapide/multiple . 20
4.1 Construction . 20
4.1.1 Généralités . 20
4.1.2 Câbles à fibres optiques pour déploiement rapide/multiple . 20
4.2 Fibres optiques . 21
4.3 Revêtement secondaire . 21
4.4 Gaine extérieure . 21
4.5 Essais mécaniques et d'environnement . 21
5 Essais de câbles à fibres optiques pour déploiement rapide/multiple . 21
5.1 Généralités . 21
5.2 Essais applicables . 22
5.3 Performance en traction . 23
5.4 Abrasion . 23
5.5 Ecrasement . 23
5.6 Chocs . 23
5.7 Dénudabilité du ruban . 24
5.8 Courbures répétées . 24
5.9 Torsion . 24
5.10 Flexion . 25
5.11 Effet de paille . 25
5.12 Courbure. 25
5.13 Courbure sous traction . 25
5.14 Cycles de températures . 26
5.15 Pénétration d'eau . 26
5.16 Vieillissement . 26
5.17 Résistance aux UV . 27
5.18 Gel extérieur . 27
5.19 Séparabilité du ruban en fibres . 27
5.20 Effet de paille sur le tube . 27
Annexe A (normative) Spécification particulière-cadre et exigences minimales . 28
Bibliographie . 29

Tableau 1 – Essais applicables aux performances mécaniques et environnementales
d'un câble à fibres optiques pour déploiement rapide/multiple . 22
Tableau A.1 – Description du câble . 28

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
CÂBLES À FIBRES OPTIQUES –
Partie 3-70: Câbles extérieurs –
Spécification de famille pour câbles à fibres
optiques extérieurs pour déploiement rapide/multiple

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l’IEC). L’IEC a pour
objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines
de l'électricité et de l'électronique. A cet effet, l’IEC – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de l’IEC"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
organisations internationales, gouvernementales et non gouvernementales, en liaison avec l’IEC, participent
également aux travaux. L’IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l’IEC concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l’IEC
intéressés sont représentés dans chaque comité d’études.
3) Les Publications de l’IEC se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de l’IEC. Tous les efforts raisonnables sont entrepris afin que l’IEC
s'assure de l'exactitude du contenu technique de ses publications; l’IEC ne peut pas être tenue responsable de
l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de l’IEC s'engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de l’IEC dans leurs publications nationales
et régionales. Toutes divergences entre toutes Publications de l’IEC et toutes publications nationales ou
régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) L’IEC elle-même ne fournit aucune attestation de conformité. Des organismes de certification indépendants
fournissent des services d'évaluation de conformité et, dans certains secteurs, accèdent aux marques de
conformité de l’IEC. L’IEC n'est responsable d'aucun des services effectués par les organismes de certification
indépendants.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à l’IEC, à ses administrateurs, employés, auxiliaires ou
mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités
nationaux de l’IEC, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre
dommage de quelque nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais
de justice) et les dépenses découlant de la publication ou de l'utilisation de cette Publication de l’IEC ou de
toute autre Publication de l’IEC, ou au crédit qui lui est accordé.
8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L’attention est attirée sur le fait que certains des éléments de la présente Publication de l’IEC peuvent faire
l’objet de droits de brevet. L’IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits
de brevets et de ne pas avoir signalé leur existence.
La Norme internationale IEC 60794-3-70 a été établie par le sous-comité 86A: Fibres et
câbles, du comité d'études 86 de l’IEC: Fibres optiques.
La présente Norme internationale doit être utilisée conj
...