IEC 60794-3-40:2008

IEC 60794-3-40 ®
Edition 1.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-40: Outdoor cables – Family specification for sewer cables and conduits
for installation by blowing and/or pulling in non-man accessible storm and
sanitary sewers
Câbles à fibres optiques –
Partie 3-40: Câbles extérieurs – Spécification de famille pour les câbles en
égouts et les conduites installés par soufflage et/ou tirage dans les évacuations
d’eaux sanitaires et pluviales non accessibles par l’homme

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IEC 60794-3-40 ®
Edition 1.0 2008-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibre cables –
Part 3-40: Outdoor cables – Family specification for sewer cables and conduits
for installation by blowing and/or pulling in non-man accessible storm and
sanitary sewers
Câbles à fibres optiques –
Partie 3-40: Câbles extérieurs – Spécification de famille pour les câbles en
égouts et les conduites installés par soufflage et/ou tirage dans les évacuations
d’eaux sanitaires et pluviales non accessibles par l’homme

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 33.180.10 ISBN 978-2-88912-748-1

– 2 – 60794-3-40  IEC:2008
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Symbols . 7
4 Family specification for sewer cables and conduits for installation by blowing
and/or pulling in sewers (blank detail specification and minimum requirements) . 8
4.1 Construction . 8
4.1.1 General . 8
4.1.2 Conduits . 8
4.1.3 Sewer cables . 8
4.1.4 Rodent protection . 8
4.2 Optical fibres . 9
4.2.1 Single-mode dispersion unshifted (B1.1) optical fibre . 9
4.2.2 Single mode dispersion shifted (B2) optical fibre . 9
4.2.3 Single mode non-zero dispersion (B4) optical fibre . 10
4.2.4 Single mode (B6) optical fibre . 10
4.2.5 Multimode fibres . 10
4.3 Sewer cable constructions . 11
4.3.1 Cable for installation within conduits (previously fixed to the sewer
wall) . 11
4.3.2 Cable for direct installation into the sewer duct . 12
4.3.3 Conduit construction . 13
4.4 Installation and operating conditions . 13
4.4.1 Tests applicable to cables/cable elements . 13
4.4.2 Installation conditions . 14
4.5 Mechanical and environmental tests . 14
4.5.1 Conduits . 14
4.5.2 Cable for installation within conduits (previously fixed to the sewer

wall) . 17
4.5.3 Cables for direct installation into the sewer duct . 21
Annex A (informative) Blank detail specification . 25
Annex B (informative) OF cables for non-man accessible sewers . 28
Annex C (informative) Examples of conduits and sewer cables . 29
Annex D (informative) Examples of installation schemes . 35

Figure C.1 – Dielectric optical fibre sewer cable. 29
Figure C.2 – Dielectric optical fibre sewer cable. 29
Figure C.3 – Optical fibre sewer cable within a conduit . 30
Figure C.4 – Optical fibre sewer cable for direct installation – peripheral strength
members. 31
Figure C.5 – Optical fibre sewer cable for direct installation – steel wire armouring . 31
Figure C.6 – Optical fibre sewer cable for spanning – peripheral strength members . 32
Figure C.7 – Optical fibre sewer cable for spanning – steel wire armouring . 32
Figure C.8 – Optical fibre sewer cable for laying – aluminium tape. 33
Figure C.9 – Optical fibre sewer cable for laying – corrugated steel . 33

60794-3-40  IEC:2008 – 3 –
Figure C.10 – Optical fibre sewer cable for laying – 2-layer-steel wire armouring . 34
Figure D.1 – Conduit robotized installation . 35
Figure D.2 – Spring loaded stainless-steel ring – conduit fastening . 36
Figure D.3 – Schematic drawing robotized installation – Drilling. 36
Figure D.4 – Schematic drawing – Spanning of optical fibre cables within sewers . 37
Figure D.5 – Schematic drawing – laying on the ground of optical fibre cables within
sewers . 37

Table 1 – Single-mode dispersion unshifted (B1.1) optical fibre . 9
Table 2 – Single mode dispersion shifted (B2) optical fibre . 9
Table 3 – Single mode non-zero dispersion (B4) optical fibre . 10
Table 4 – Single mode (B6) optical fibre . 10
Table 5 – Characteristics – Cable for installation within conduits (previously fixed to
the sewer wall) . 11
Table 6 – Characteristics – Cable for direct installation into the sewer duct . 12
Table 7 – Characteristics – Conduit construction . 13
Table 8 – Tests applicable to cables/cable elements . 13
Table 9 – Conduits – Tests applicable . 14
Table 10 – Optical fibre cable – Tests applicable . 17
Table 11 – Tests applicable . 21
Table A.1 – Sewer optical fibre cable description – Within conduits . 25
Table A.2 – Sewer optical fibre description – Direct installation . 26
Table A.3 – Conduit description . 27
Table B.1 – Characteristics for optical fibre cables within non-man accessible sewers . 28

– 4 – 60794-3-40  IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
OPTICAL FIBRE CABLES –
Part 3-40: Outdoor cables –
Family specification for sewer cables and
conduits for installation by blowing and/or pulling
in non-man accessible 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 part
...