SIST EN 50174-3:2014/A1:2017

SLOVENSKI STANDARD
SIST EN 50174-3:2014/A1:2017
01-julij-2017
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Information technology - Cabling installation - Part 3: Installation planning and practices
outside buildings
Informationstechnik - Installation von Kommunikationsverkabelung - Teil 3:
Installationsplanung und Installationspraktiken im Freien
Technologies de l'information - Installation de câblage - Partie 3: Planification et
pratiques d'installation à l'extérieur des bâtiments
Ta slovenski standard je istoveten z: EN 50174-3:2013/A1:2017
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
SIST EN 50174-3:2014/A1:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50174-3:2014/A1:2017

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SIST EN 50174-3:2014/A1:2017


EUROPEAN STANDARD EN 50174-3:2013/A1

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2017
ICS 35.110

English Version
Information technology - Cabling installation - Part 3: Installation
planning and practices outside buildings
Technologies de l'information - Installation de câblage - Informationstechnik - Installation von
Partie 3: Planification et pratiques d'installation à l'extérieur Kommunikationsverkabelung - Teil 3: Installationsplanung
des bâtiments und Installationspraktiken im Freien
This amendment A1 modifies the European Standard EN 50174-3:2013; it was approved by CENELEC on 2017-04-17. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50174-3:2013/A1:2017 E

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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
European foreword
This document (EN 50174-3:2013/A1:2017) has been prepared by CLC/TC 215 "Electrotechnical aspects of
telecommunication equipment".
The following dates are fixed:
• latest date by which this document has to be
(dop) 2018-04-17
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards
(dow) 2020-04-17
conflicting with this document have to
be withdrawn
This document comes with:
– a new sub-clause 4.10 on planning of repair;
– modifications to the definitions used;
– technical and editorial corrections to Clauses 4, 5, 6, 7, Annex A and Annex B.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
Introduction
Replace bullet 3 with “3) application dependent cabling design (e.g. EN 50700);
Delete bullet 4)
Replace bullet 5) with “4) bonding requirements (EN 50310) - the principles of which can be employed in
installations outside buildings.
Replace Figure 1 by the following figure:
EN 50173-2: Information technology: EN 50700: Information technology -
Generic cabling - Office spaces Premises distribution access network
(PDAN) cabling to support deployment
EN 50173-3: Information technology:
of optical broadband networks
Generic cabling - Industrial spaces
EN 50173-1: Information technology:
EN 50173-4: Information technology: Generic cabling - General requirements
Generic cabling - Homes
EN 50173-5: Information technology:
Generic cabling - Data centre spaces
EN 50173-6: Information technology:
Generic cabling - Distributed building
services
EN 50174-1: Information technology. CLC/TR 50174-99-1: Information
Cabling installation - Installation technology. Cabling installation -
specification and quality assurance Remote powering
EN 50174-2: Information technology. EN 50310: Telecommunications
Cabling installation - Installation bonding networks for buildings and
planning and practices inside buildings other structures
EN 50174-3: Information technology.
Cabling installation - Installation
planning and practices outside buildings

Replace Table 1 by the following Table
Building design Generic cabling Specification phase Installation phase Operation phase
phase design phase
EN 50173-2 EN 50174-1
EN 50173-3
Planning phase
EN 50173-4
EN 50174-2
EN 50173-5
EN 50310 EN 50174-3 EN 50174-1
EN 50310
EN 50174-2
EN 50173-6
EN 50174-3
(these ENs reference EN 50310
general requirements
of EN 50173-1)

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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
2 Normative references
Update title of EN 50310: “Telecommunications bonding networks for buildings and other structures“
Delete EN 50346
Delete EN 60950 (all parts)
Delete EN 60950-1
Add EN 13501-6, Fire classification of construction products and building elements. Classification using data
from reaction to fire tests on electric cables
Add EN 61300-3-35, Fibre optic connecting devices and passive components. Basic test and measurements
procedures. Examinations and measurements. Fibre optic connector endface visual and automated
inspection
Add EN 62368-1, Audio/video, information and communication technology equipment – Part 1: Safety
requirements (IEC 62368-1:2014, modified)
Add EN 62368-3, Audio/video, information and communication technology equipment – Safety – Part 3: DC
power transfer through information technology communication cabling (IEC 62368-3)
3 Terms, definitions and abbreviations
3.1 Terms and definitions
Insert new definition 3.1.8 and renumber the following ones accordingly:
3.1.8
extraneous-conductive-part
conductive part not forming part of the electrical installation and liable to introduce an electric potential,
generally the electric potential of a local earth
[SOURCE: IEC 60050-826:2004, 826-12-11, IEC 60050-195:1998, 195-06-11]
Amend existing definition 3.1.11 to read
“vault/chamber as part of an underground conduit system and used to facilitate placing, connectorisation,
and maintenance of cables as well as the placing of associated equipment, in which it is expected that a
person will enter to perform work”
Delete existing definition 3.1.12 “rural area”
Amend definition 3.1.14 to read
“use of electrically conductive barriers or physical separation to prevent electromagnetic interference
between external noise sources, including power supply cabling, and information technology cabling
[SOURCE: EN 50174-2:2009/A2:2014, 3.1.28 modified – deleted the word "earthed"]”
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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
Insert new definition 3.1.17 and renumber the following one accordingly:
3.1.17
subscriber
identifiable entity, and the space allocated to that entity, within the premises that may require a future direct
connection to the access network

[SOURCE: EN 50700:2014, 3.1.22 – modified: added “and the space allocated to that entity”]
Delete existing definition 3.1.18 “urban area”

4 Requirements for planning installations of information technology cabling
4.1.2 Power supply cabling
Amend title to read “Low voltage power supply cabling”.
4.1.4 Transmission and terminal equipment
st
Replace 1 paragraph with:
“Information technology cabling shall be connected to equipment that incorporates safe signal circuitry
complying with the SELV circuit and the TNV requirements as defined in the EN 60950 series and
EN 62368-1. Where equipment provides direct current (DC) power transfer over the information technology
cabling it shall comply with EN 62368-3.”
4.1.5 Cells and batteries
Delete this subclause and renumber the following ones accordingly.
4.1.7 Closures
Replace sub-clause with:
“Where both information technology cabling and power supply cabling are contained within a closure any
conductive material of the closure or internal barriers shall be treated in accordance with HD 384/HD 60364
series and/or local regulations as appropriate.
In addition:
a) a barrier (either conducting or non-conducting) shall be present between the two cable types which shall
meet a minimum of IP20 as specified in EN 60529;
b) covers on the closure shall allow separate access to the information technology cabling and the power
supply cabling and shall be retained such that the use of a tool is necessary to gain access thereby
preventing inadvertent connection between the power supply and the information technology cabling;
c) the entry for the information technology cables shall be separately removable.”
4.3 Pathways
4.3.1.1 Requirements
Insert after paragraph 1:
The external surfaces of existing piping systems shall not be used for the installation of pathways systems or
the direct attachment of cables.
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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
4.3.7.2 Pathways shared with overhead power supply infrastructures
4.3.7.2.2 Requirements
Amend bullet c) to read:
c) the requirements for earthing systems, aerial to underground junctions and aerial connections.
Amend last paragraph to read:
“Where an earthing system exists on a supporting structure then, unless technical and contractual
agreement for joint use has been obtained, it shall be dedicated to only one of the following applications:”
4.3.7.3 The provision of a parallel earthing conductor (PEC)
4.3.7.3.2 Requirements
Replace sub-clause to read:
“A PEC shall be connected to an earthing system at least at one point. The planning of any additional
connections shall be in accordance with the HD 384/HD 60364 series and/or local regulations as
appropriate.
An information technology cable screen shall not be used where a PEC is required to withstand large
currents (e.g. for lightning protection or as power fault current return).”
4.3.7.3.3 Recommendations
Replace “parallel earthing conductor” with “PEC”
4.4 Pathway systems
4.4.1.2 Requirements
th
paragraph (including the 3 bullets) with the following:
Replace 5
“Pathways, entry points to the pathways and the pathway systems selected shall ensure cables are able to
be installed and, where appropriate, fixed in accordance with the applicable minimum bend radius (during
installation, during operation – static and during operation – dynamic) without introducing deformation of the
cable sheath or applying compressive loads exceeding that specified for the cable. These requirements
apply in three dimensions. This can be achieved by the use of pre-fabricated curved corners, drop-outs,
radius limiters or other means as shown in Figure 4.





Non-conformant solutions Conformant solutions
Figure 4 – Examples of non-conformant and conformant bend limiting techniques”
Renumber the following Figures accordingly (both in text and figure captions).
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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
th th
Replace 7 and 8 paragraph with the following:
NOTE 1 Pathway systems that do not allow such an approach can restrict the type and use of cables installed in the pathways and
cable management systems selected.
NOTE 2 For cables with additional protection, minimum bend radius can be greater than specified above.”
4.5 Pathway systems other than for core and access networks
4.5.1.2 Requirements
st
Insert text after 1 paragraph:
“Conductive pathway systems in close proximity to HV power supply cabling shall be protected from
electrical hazards by means of protective earthing and/or sectioning.”
4.5.4.2 Pathway systems on overhead power supply infrastructures
4.5.4.2.1 General
nd
Amend 2 paragraph to read:
“Components of the pathway systems can include:”
Amend bullet g) to read:
g) fittings to allow electrostatic discharge of the information technology cable sheath at each end of the
pathway.

4.5.4.2.2 Requirements for metallic information technology cables
Replace bullet b) and last paragraph to read:
“b) connected to the earthing system of power supply system; this connection also includes that of
extraneous-conductive-parts of the cables.
The earthing at the ends of the shared routes of extraneous-conductive-parts (e.g. armouring, strain relief
members of optical fibre cables) that are part of the information technology cable construction shall be in
accordance with local regulations. Where no local regulation exists the default procedure is to earth the
conductive parts at one end and insulate them at the other. In all cases the procedures used shall be
documented.”
4.9 Spaces and structures other than for core and access networks
4.9.3 Telecommunication cabinets
4.9.3.1 Requirements
Amend to read:
“The design of the telecommunications cabinets shall consider any requirements for the accommodation of
climate control equipment, electrical connections (including uninterruptible power supplies) and alarms
systems to advise of unauthorised access.”
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SIST EN 50174-3:2014/A1:2017
EN 50174-3:2013/A1:2017 (E)
4.9.4 Building entrance facilities
4.9.4.1 General
4.9.4.1.1 Requirements
nd
paragraph with:
Replace 2
Information technology cables of EuroClass F in accordance with EN 13501-6 or others that do not comply
ca
with the minimum recommended performance requirements of EN 60332-1-2 shall either be:
a) terminated in an entrance facility which is outside the external fire barrier of the building
or
b) terminated inside the building, within 2 m (unless an alternative distance is specified by local
regulations) of the point of internal penetration of the external fire barrier (e.g. floor/ceiling/wall) or any
length exceeding 2 m (unless an alternative distance is specified by local regulations) is installed within
trunking or conduit that is considered as a fire barrier in accordance with local fire regulations.

NOTE This also applies where the cable has to pass through a space between two external fire barriers within a building.

4.9.4.1.2 Recommendations
nd
Replace 2 paragraph to read:
“Cables should enter buildings as close as possible to any conducting pipes (e.g. gas, water, heating) in
order to minimise:
a) induction loops,
b) the length and impedance of bonding conductors.
th
Replace 4 paragraph to read:
The earthing of extraneous-conductive-parts (e.g. armouring, strain relief members of optical fibre cables)
that are part of the information technology cable construction shall be in accordance with local regulations.
Where no local regulation exists the default procedure i
...