Optical fibre cables - Part 3-40: Outdoor cables - Family specification for cables for storm and sanitary sewers

IEC 60794-3-40: 2022 is a family specification that covers sewer cables and conduits for installation by blowing and/or pulling in man accessible and non-man accessible storm and sanitary sewers. Systems built with components covered by this document are subject to the requirements of sectional specification IEC 60794-3. Sewer cable and conduit constructions need to meet the different requirements of the sewer operating companies and/or associations regarding chemical, environmental, operational, cleaning and in general maintenance conditions. Preferential applications, describing sewer cable characteristics versus methods of installation is reported in Annex A and Annex B for non-man accessible sewers. Clause 5 describes characteristics of sewer cables and conduits for installation by blowing, pulling or other means in storm and sanitary sewers. Detail specifications can be prepared on the basis of this family specification. It is important that acceptance criteria are interpreted with respect to this consideration. The number of fibres tested is representative of the sewer cable and is agreed between the customer and the supplier. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:  
this document follows the new structure for family specifications: symbols and abbreviations were included in Clause 3, and Clause 4 became the General requirements with 4.1 Optical fibres, 4.2 Cable element and 4.3 Optical fibre cable construction;
Annex D has been removed as it is part of IEC TR 62691;
this document has been streamlined by cross-referencing IEC 60794-1-1, IEC 60793-2, IEC 60794-3 and the IEC 60794-1-2x series;
the fibre strain allowance for tensile tests was updated;
characteristics Table 5, Table 6, Table 7 were moved to the Annex A (informative).

Câbles à fibres optiques - Partie 3-40: Câbles extérieurs - Spécification de famille pour les câbles destinés aux évacuations d’eaux sanitaires et pluviales

IEC 60794-3-40:2022 s’applique aux câbles en égouts et aux conduits en vue de leur installation par soufflage et/ou tirage dans les évacuations d’eaux pluviales et sanitaires accessibles et non accessibles par l’homme. Les systèmes intégrant des éléments couverts par le présent document sont soumis aux exigences de la spécification intermédiaire IEC 60794-3. Il est nécessaire que les constructions des câbles en égouts et des conduits satisfassent aux différentes exigences d’ordre chimique, environnemental, fonctionnel et aux conditions générales en matière de nettoyage et de maintenance qui incombent aux entreprises et/ou aux organismes de maintenance des égouts. Les applications préférentielles, qui décrivent les caractéristiques des câbles en égouts en fonction des méthodes d’installation sont rapportées à l’Annexe A et l’Annexe B pour les égouts non accessibles par l’homme. L’Article 5 décrit les caractéristiques des câbles en égouts et des conduits en vue de leur installation par soufflage, tirage ou d’autres moyens dans des évacuations d’eaux pluviales et sanitaires. Les spécifications particulières peuvent être préparées sur la base de cette spécification de famille. Il importe d’interpréter les critères d’acceptation en conséquence. Le nombre de fibres soumises à l’essai est représentatif du câble en égouts et il fait l’objet d’un accord entre le client et le fournisseur. Cette seconde édition annule et remplace la première édition parue en 2008. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) le présent document suit la nouvelle structure relative aux spécifications de famille. Les symbols et abréviations ont été inclus à l’Article 3, et l’Article 4 s’intitule désormais Exigences générales, et est composé de 4.1 Fibres optiques, 4.2 Elément de câble et 4.3 Construction d’un câble à fibres optiques;
b) l’Annexe D a été supprimée étant donné qu’elle fait partie intégrante de l’IEC TR 62691;
c) le présent document a été simplifié en s’appuyant sur des références à l’IEC 60794-1-1, l’IEC 60793-2, l’IEC 60794-3 et la série IEC 60794-1-2x;
d) la tolérance en matière de déformation de la fibre pour les essais de traction a été mise à jour; e) le Tableau 5, le Tableau 6 et le Tableau 7, Caractéristiques, ont été déplacés à l’Annexe A (informative).

General Information

Status
Published
Publication Date
26-Apr-2022
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
27-Apr-2022
Ref Project

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IEC 60794-3-40
Edition 2.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-40: Outdoor cables – Family specification for cables for storm and
sanitary sewers
Câbles à fibres optiques –

Partie 3-40: Câbles extérieurs – Spécification de famille pour les câbles destinés

aux évacuations d’eaux sanitaires et pluviales
IEC 60794-3-40:2022-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60794-3-40
Edition 2.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-40: Outdoor cables – Family specification for cables for storm and
sanitary sewers
Câbles à fibres optiques –

Partie 3-40: Câbles extérieurs – Spécification de famille pour les câbles destinés

aux évacuations d’eaux sanitaires et pluviales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-1101-0

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 60794-3-40:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms, definitions, symbols and abbreviated terms .......................................................... 7

4 General requirements ...................................................................................................... 7

4.1 Optical fibres .......................................................................................................... 7

4.2 Cable element ......................................................................................................... 7

4.3 Optical fibre cable and conduit construction ............................................................ 7

4.3.1 General ........................................................................................................... 7

4.3.2 Conduits .......................................................................................................... 8

4.3.3 Sewer cables ................................................................................................... 8

4.3.4 Rodent protection ............................................................................................ 8

5 Details of family requirements and test conditions for optical fibre cable and

conduit ............................................................................................................................ 8

5.1 Cable for installation within conduits (previously fixed to the sewer wall) ................ 8

5.2 Cable for direct installation into the sewer duct ....................................................... 8

5.3 Conduit construction ............................................................................................... 8

5.4 Operating conditions ............................................................................................... 9

5.5 Mechanical and environmental tests ....................................................................... 9

5.5.1 Conduits .......................................................................................................... 9

5.5.2 Cable for installation within conduits (previously fixed to the sewer wall) ....... 12

5.5.3 Cables for direct installation into the sewer duct ............................................ 17

Annex A (informative) Blank detail specification – Sewer cables description ........................ 24

A.1 Conduit description ............................................................................................... 24

A.2 Cable for installation within conduits (previously fixed to the sewer wall) .............. 25

A.3 Cables for direct installation into the sewer duct ................................................... 26

Annex B (informative) Cables for non-man accessible sewers .............................................. 27

Annex C (informative) Examples of conduits and sewer cables ............................................ 28

C.1 Loose tube cables for installation within conduits .................................................. 28

C.1.1 Dielectric sewer cables .................................................................................. 28

C.1.2 Sewer cable installed within a conduit ........................................................... 28

C.2 Loose tube cables for direct installation into the sewer duct .................................. 29

C.2.1 Cables to be screwed to the sewer inner wall ................................................ 29

C.2.2 Cables for spanning between manholes, similarly to aerial cables ................. 30

C.2.3 Cables for laying on the ground of the sewer ................................................. 31

Bibliography .......................................................................................................................... 32

Figure C.1 – Dielectric optical fibre sewer cable .................................................................... 28

Figure C.2 – Dielectric optical fibre sewer cable .................................................................... 28

Figure C.3 – Optical fibre sewer cable within a conduit ......................................................... 29

Figure C.4 – Optical fibre sewer cable for direct installation – Peripheral strength

members ............................................................................................................................... 29

Figure C.5 – Optical fibre sewer cable for direct installation – Steel wire armouring .............. 30

Figure C.6 – Optical fibre sewer cable for spanning – Peripheral strength members ............. 30

Figure C.7 – Optical fibre sewer cable for spanning – Steel wire armouring .......................... 30

---------------------- Page: 4 ----------------------
IEC 60794-3-40:2022 © IEC 2022 – 3 –

Figure C.8 – Optical fibre sewer cable for laying – Aluminium tape ....................................... 31

Figure C.9 – Optical fibre sewer cable for laying – Corrugated steel ..................................... 31

Figure C.10 – Optical fibre sewer cable for laying – 2-layer-steel wire armouring .................. 31

Table 1 – Conduit tests applicable .......................................................................................... 9

Table 2 – Optical fibre cable – Tests applicable .................................................................... 13

Table 3 – Tests applicable .................................................................................................... 18

Table A.1 – Conduit description ............................................................................................ 24

Table A.2 – Sewer optical fibre cable description – Within conduits ...................................... 25

Table A.3 – Sewer optical fibre cable description – Direct installation ................................... 26

Table B.1 – Characteristics for optical fibre cables within non-man accessible sewers .......... 27

---------------------- Page: 5 ----------------------
– 4 – IEC 60794-3-40:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRE CABLES –
Part 3-40: Outdoor cables –
Family specification for cables for storm and sanitary sewers
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 dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

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.

IEC 60794-3-40 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical

committee 86: Fibre optics. It is an International Standard.

This second edition cancels and replaces the first edition published in 2008. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) this document follows the new structure for family specifications: symbols and abbreviations

were included in Clause 3, and Clause 4 became the General requirements with 4.1 Optical

fibres, 4.2 Cable element and 4.3 Optical fibre cable construction;
b) Annex D has been removed as it is part of IEC TR 62691;

c) this document has been streamlined by cross-referencing IEC 60794-1-1, IEC 60793-2,

IEC 60794-3 and the IEC 60794-1-2x series;
d) the fibre strain allowance for tensile tests was updated;
---------------------- Page: 6 ----------------------
IEC 60794-3-40:2022 © IEC 2022 – 5 –

e) characteristics Table 5, Table 6, Table 7 were moved to the Annex A (informative).

The text of this International Standard is based on the following documents:
Draft Report on voting
86A/2189/FDIS 86A/2191/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

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 document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document 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: 7 ----------------------
– 6 – IEC 60794-3-40:2022 © IEC 2022
OPTICAL FIBRE CABLES –
Part 3-40: Outdoor cables –
Family specification for cables for storm and sanitary sewers
1 Scope

This part of IEC 60794 is a family specification that covers sewer cables and conduits for

installation by blowing and/or pulling in man accessible and non-man accessible storm and

sanitary sewers. Systems built with components covered by this document are subject to the

requirements of sectional specification IEC 60794-3.

Sewer cable and conduit constructions need to meet the different requirements of the sewer

operating companies and/or associations regarding chemical, environmental, operational,

cleaning and in general maintenance conditions.

Preferential applications, describing sewer cable characteristics versus methods of installation

is reported in Annex A and Annex B for non-man accessible sewers.

escribes characteristics of sewer cables and conduits for installation by blowing,

Clause 5 d
pulling or other means in storm and sanitary sewers.
Detail specifications can be prepared on the basis of this family specification.

It is important that acceptance criteria are interpreted with respect to this consideration. The

number of fibres tested is representative of the sewer cable and is agreed between the customer

and the supplier.
2 Normative references

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.
IEC 60793-2, Optical fibres – Part 2: Product specifications – General
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 – Basic optical cable test

procedures – General guidance

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 60794-1-215, Optical fibre cables – Part 1-215: Generic specification – Basic optical cable

test procedures – Environmental test methods – Cable external freezing test, Method F15

---------------------- Page: 8 ----------------------
IEC 60794-3-40:2022 © IEC 2022 – 7 –

IEC 60794-3:2014, Optical fibre cables – Part 3: Outdoor cables – Sectional specification

IEC 60794-5, Optical fibre cables – Part 5: Sectional specification – Microduct cabling for

installation by blowing

IEC 60794-5-10, Optical fibre cables – Part 5-10: Family specification – Outdoor microduct

optical fibre cables, microducts and protected microducts for installation by blowing

IEC 60811-501, Electric and optical fibre cables – Test methods for non-metallic materials –

Part 501: Mechanical tests – Tests for determining the mechanical properties of insulating and

sheathing compounds

IEC TR 62362:2020, Selection of optical fibre cable specifications relative to mechanical,

ingress, climatic or electromagnetic characteristics – Guidance
3 Terms, definitions, symbols and abbreviated terms

For the purposes of this document, the terms, definitions, symbols and abbreviated terms given

in IEC 60794-1-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 General requirements
4.1 Optical fibres

The optical fibre shall conform to the requirements of IEC 60793-2. The fibre type shall be

agreed between the customer and supplier. The cabled fibre shall conform to IEC 60794-3.

4.2 Cable element
The cable elements shall conform to IEC 60794-3.
4.3 Optical fibre cable and conduit construction
4.3.1 General

In addition to the constructional requirements of sectional specification IEC 60794-3, the

following considerations apply to the sewer cables and/or conduits.

The tests of this specification are intended to assess the performance of cables and conduits,

as manufactured and under agreed ageing and performance-limit tests. These tests are not

intended to define end-of-life performance. See IEC 60794-3:2014, 6.1.

The materials in the cable or conduit shall not present a health hazard within its intended use.

The clamping systems and accessories associated with cables and conduits of this document

are not specified herein. Such parts shall be agreed between the customer and the installer

depending on the installation technique.
Annex C shows examples of conduits and sewer cables.
---------------------- Page: 9 ----------------------
– 8 – IEC 60794-3-40:2022 © IEC 2022
4.3.2 Conduits

If used, conduits shall conform to the installation and system design considerations of 4.3.3.

Conduits shall be able to resist pressure differences needed for installation by blowing and

outside pressure due to sewer cleaning operations. Conduits shall be circular and, if needed,

corrugated in cross-section throughout their length. The material shall withstand all possible

chemical attacks by the sewer liquid itself. Such chemicals hazards shall be agreed between

customer and supplier as well as the geometric dimensions, for example inner- and outer-

diameter, overall minimum wall thickness, of the conduit.
NOTE For instance stainless steel conduits have shown reliable performance.
4.3.3 Sewer cables

A sewer cable in accordance to this document should be suitable for installation in man

accessible storm and sanitary sewers and non-man accessible sewers and lateral sewer

systems, by installation methods as agreed between customer and supplier. Common
installation methods include

– blowing and/or pulling into a conduit, previously fixed to the sewer wall or, for laterals,

placed in between the lateral sewer wall and the in-liner system, and

– direct installation into the sewer duct, according to the following applications:

• drilling and screwing to the inner wall;
• spanning between manholes, etc. similarly to aerial cables;
• laying on the ground of the sewer.

The size and installation of the sewer cable shall be such that it does not restrict the flow of

sewer fluid or create obstacles to flow of any debris within the sewer pipe, as agreed between

customer and supplier.

Sewer cables installed without conduit into sewer systems shall be so constructed to withstand

chemical attacks by the sewer liquid. Such chemical hazards shall be agreed between customer

and supplier, using 5.5.3.3.9 as guidance.
4.3.4 Rodent protection

Rodent protection is generally needed but there is presently no standard test to measure the

level of rodent protection. Rodent protection can be provided by the cable or by the duct.

5 Details of family requirements and test conditions for optical fibre cable and
conduit
5.1 Cable for installation within conduits (previously fixed to the sewer wall)

The cable construction shall confirm to IEC 60794-3, IEC 60794-5 or IEC 60794-5-10, as

appropriate.
5.2 Cable for direct installation into the sewer duct
The cable construction shall confirm to IEC 60794-3.
5.3 Conduit construction

The conduit construction shall conform to the performance required for the sewer environment

as compatible with the performance intent of cables of IEC 60794-3 and of IEC 60794-5 and

IEC 60794-5-10 as applicable to microducts. Specific attributes to be considered in conduit

construction are:
---------------------- Page: 10 ----------------------
IEC 60794-3-40:2022 © IEC 2022 – 9 –
• materials;
• conduit dimensions – inner and outer diameter;
• moisture barrier types (if used) – materials, metallic tapes, etc.;

• for corrugated conduit (metallic) – metal tape thickness, corrugation depth and pitch, overlap

requirements;
• for inner tubes (if used) – tube materials, tube dimensions.
The performance attributes shall be agreed between customer and supplier.
5.4 Operating conditions

The operating conditions of cables within sewers may be different from those of general cables

of IEC 60794-3. Different operating regimes, if applicable, shall be agreed between customer

and supplier. Consideration shall also be given to any operating regimes occurring when the

cable exits the sewer system. Typical considerations include
• temperatures of sewer fluids, especially high temperatures,

• normal operating temperature ranges that may be less severe than those usual for

IEC 60794-3 cables, especially the low temperature extreme,
• chemical exposure, as covered in 5.5.3.3.9, and
• other special conditions, as agreed between customer and supplier.
5.5 Mechanical and environmental tests
5.5.1 Conduits
5.5.1.1 Conduit tests (select applicable tests)

Tests listed in Table 1 are those relevant to IEC 60794-3, 60794-5 and 60794-5-10 as

applicable for conduits.
Table 1 – Conduit tests applicable
Characteristics IEC 60794-3:2014 Family Test methods Remarks
requirements
(IEC 60794-5-10:2014)
If external pressure
resistance is required,
IEC 60794-1-22,
IEC 60794-1-22,
Pressure withstand (6.1, Table 3) 5.5.1.2.2 method F10, may be
method F13
used, as agreed
between customer
and supplier.
Clause 9, Table 3 IEC 60794-1-21,
Tensile performance 5.5.1.2.3
(6.1, Table 3) method E1
Clause 9, Table 3 IEC 60794-1-21,
Crush 5.5.1.2.5
(6.1, Table 3) method E3A
Clause 9, Table 3 IEC 60794-1-21,
Impact 5.5.1.2.6
(6.1, Table 3) method E4
Clause 9, Table 3 IEC 60794-1-21,
Repeated bending 5.5.1.2.7
(6.1, Table 3) method E6
Clause 9, Table 3 IEC 60794-1-21,
Torsion 5.5.1.2.8
(6.1, Table 3) method E7
Clause 9, Table 3 IEC 60794-1-21,
Kink 5.5.1.2.4
(6.1, Table 3) method E10
Clause 9, Table 3 IEC 60794-1-21,
Bend 5.5.1.2.9
(Bend) (6.1, Table 3) method E11B
---------------------- Page: 11 ----------------------
– 10 – IEC 60794-3-40:2022 © IEC 2022
Characteristics IEC 60794-3:2014 Family Test methods Remarks
requirements
(IEC 60794-5-10:2014)
IEC 60794-1-21,
Bending under
Clause 9, Table 3 5.5.1.2.10 method E18A,
tension
procedure 1
Clause 9, Table 3 IEC 60794-1-22,
Ageing 5.5.1.2.11
(6.1, Table 3) method F9
IEC 60794-3 or IEC 60794-5-10 as applicable.
5.5.1.2 Details of family requirements and test conditions for conduits
5.5.1.2.1 General

Tests shall be selected from those of Table 1 and the following hereinafter described.

5.5.1.2.2 Pressure withstand
a) Family requirements

Under visual examination, without magnification, there shall be no damage to the conduit.

b) Test conditions:
– Method: IEC 60794-1-22, method F13

– Apply an air pressure of 2,5 x the specified installation pressure at standard ambient

temperature, per IEC 60794-1-2, for 30 min.

– Apply an air pressure of 1,3 x the specified installation pressure and maintain at 40 ºC,

or other elevated temperature as specified, for 24 h.
5.5.1.2.3 Tensile performance
a) Fa
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