Optical fibre cables - Part 3-70: Outdoor cables - Family specification for outdoor optical fibre cables for rapid/multiple deployment

IEC 60794-3-70:2016 is part of 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.).
This publication is to be read in conjunction with IEC 60794-1-1:2015, IEC 60794-1-2:2013 and IEC 60794-3:2014. Keywords: outdoor optical fibre cables intended for rugged terrestrial 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

L'IEC 60794-3-70:2016 est partie de une spécification de famille qui couvre les câbles à fibres optiques extérieurs destinés à un déploiement rapide/multiple terrestre renforcé. Ces câbles, dont les performances mécaniques, environnementales et d'infiltration sont améliorées, peuvent être utilisés partout où un déploiement rapide ou multiple est applicable (par exemple dans des unités mobiles de diffusion, des services de secours d'urgence, des robots mobiles extérieurs, etc.).
Cette publication doit être lue conjointement avec la IEC 60794-1-1:2015, IEC 60794-1-2:2013 et IEC 60794-3:2014. Mots clés: les câbles fibres optiques extérieurs destinés à un déploiement rapide/multiple terrestre renforcé

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Status
Published
Publication Date
27-Jan-2016
Technical Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
07-Apr-2021
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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
IEC 60794-3-70:2016-01(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60794-3-70:2016 © IEC 2016 – 3 –
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.
---------------------- Page: 5 ----------------------
– 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.
---------------------- Page: 6 ----------------------
IEC 60794-3-70:2016 © IEC 2016 – 5 –
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.
---------------------- Page: 7 ----------------------
– 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.
---------------------- Page: 8 ----------------------
IEC 60794-3-70:2016 © IEC 2016 – 7 –
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.
---------------------- Page: 9 ----------------------
– 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 %

---------------------- Page: 10 ----------------------
IEC 60794-3-70:2016 © IEC 2016 – 9 –

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

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

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.

---------------------- Page: 11 ----------------------
– 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
---------------------- Page: 12 ----------------------
IEC 60794-3-70:2016 © IEC 2016 – 11 –

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 cond
...

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