EN 50174-2:2009/A2:2014

SLOVENSKI STANDARD
01-december-2014
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Information technology - Cabling installation - Part 2: Installation planning and practices
inside buildings
Informationstechnik - Installation von Kommunikationsverkabelung - Teil 2:
Installationsplanung und Installationspraktiken in Gebäuden
Technologies de l'information - Installation de câblages - Partie 2: Planification et
pratiques d'installation à l'intérieur des bâtiments
Ta slovenski standard je istoveten z: EN 50174-2:2009/A2:2014
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50174-2:2009/A2

NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2014
ICS 35.110; 91.140.50
English Version
Information technology - Cabling installation - Part 2: Installation
planning and practices inside buildings
Technologies de l'information - Installation de câblages - Informationstechnik - Installation von
Partie 2: Planification et pratiques d'installation à l'intérieur Kommunikationsverkabelung - Teil 2: Installationsplanung
des bâtiments und Installationspraktiken in Gebäuden
This amendment A2 modifies the European Standard EN 50174-2:2009; it was approved by CENELEC on 2014-08-26. 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, 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
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50174-2:2009/A2:2014 E

Contents Page
Foreword . 3
Introduction . 4
2 Normative references . 6
3 Terms, definitions and abbreviations. 6
3.1 Terms and definitions . 6
4 Requirements for planning installations of information technology cabling . 8
4.4 Pathway systems . 9
4.6 Closures . 9
4.8 Filtering and electrical isolation components and surge protective device . 9
4.10 Planning for repair . 10
5 Requirements for the installation of information technology cabling . 10
5.4 Surge protective devices . 11
6 Segregation of metallic information technology cabling and power supply cabling . 11
8 Office (commercial) premises . 12
9 Industrial premises . 15
10 Homes . 16
11 Data centres . 16
12 Common infrastructures within multi-tenant buildings . 20
12.1 General . 20
12.2 Spaces in common areas . 21
12.3 Pathways in common areas . 21
12.4 Requirements for planning installations of information technology cabling . 22
12.5 Requirements for the installers of information technology cabling . 33
12.6 Segregation of metallic information technology cabling and power supply cabling . 33
Annex A (informative) EMC and protection . 33
A.3 Filtering and electrical isolation components and surge protective devices . 33
Annex B (informative) Application of responsibilities . 33
Bibliography . 36

- 3 - EN 50174-2:2009/A2:2014

Foreword
This document (EN 50174-2:2009/A2:2014) 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) 2015-08-26
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards
(dow) 2017-08-26
conflicting with this document have to
be withdrawn
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.
This amendment covers:
– a new Clause 12 on common pathways and spaces within multi-tenant buildings;
– a modified treatment of A.3 to ensure to that it addresses the planning and installation of electrical
isolation components internal to buildings (EN 50174-3 will include an Annex with the same topic for
external to buildings);
− some technical and editorial changes to Clauses 3, 4, 5, 8 and 11.

Introduction
Replace Figure 1 by the following figure:
EENN 5009500988--1:1: C Cususttomomerer pr preemmiisseses ccablabliing fng foror EENN 5017501733--2:2: I Infnforormmatatiion ton tecechnolhnoloogygy --
iinfnforormmatatiion ton tecechnolhnoloogygy -- IISSDDNN b baassiicc a acccceessss GGenenereriicc c cablabliing ng ssyysstteemmss -- OOffffiicce pre prememiisseses
EENN 5017501733--3:3: I Infnforormmatatiion ton tecechnolhnoloogygy --
GGenenereriicc c cablabliing ng ssyysstteemmss -- IIndusndusttrriialal prprememiisseses
EENN 5009500988--2:2: C Cususttomomerer pr preemmiisseses ccablabliing fng foror
iinfnforormmatatiion ton tecechnolhnoloogygy -- 202048 48 kkbbiit/st/s IISSDN pDN prriimmaarryy
EENN 5017501733--4:4: I Infnforormmatatiion ton tecechnolhnoloogygy -- EENN 5017501733--1:1: I Infnforormmatatiion ton tecechnolhnoloogygy --
acacccesesss and l and leaseased ed lliine ne nnetetwwororkk i intntererffacacee
GGenenereriicc c cablabliing ng ssyysstteemmss -- HHomomeess GGenenereriicc c cablabliing ng ssyysstteemmss -- GGenereneralal
rrequiequirrememententss
EENN 5017501733--5:5: I Infnforormmatatiion ton tecechnolhnoloogygy --
GGenenereriicc c cablabliing ng ssyysstteemmss -- DDatata a ccententrreses
EENN 5017501733--6:6: I Infnforormmatatiion ton tecechnolhnoloogygy --
GGenenereriicc c cablabliing ng ssyysstteemmss -- DDiissttrriibutbuted buied builldidinng g
sserervviicceses
EENN 5017501744--1:1: I Infnforormmatatiion ton tecechnolhnoloogygy -- CCablabliing ng
iinsnsttalalllatatiion on -- IInsnsttalalllatatiion son specpeciiffiiccatatiion on aand qnd qualualiittyy
asasssururancancee
EENN 5017501744--2:2: I Infnforormmatatiion ton tecechnolhnoloogygy -- CCablabliing ng EENN 503150310:0: A Applppliiccatatiion ofon of eqequiuipotpoteentntiialal bonbondiding ng
iinsnsttalalllatatiion on -- IInsnsttalalllatatiion on plplannianninng g and and prpracacttiicceses and and eareartthihinngg iin bn buiuilldidingsngs w wiitth ih infnforormmaattiion on
iinsnsiide buide builldidingsngs ttecechnolhnoloogygy e equiquipmpmentent
EENN 5017501744--3:3: I Infnforormmatatiion ton tecechnolhnoloogygy -- CCablabliing ng
iinsnsttalalllatatiion on -- IInsnsttalalllatatiion on plplannianninng g and and prpracacttiicceses
outoutssiide buide builldidinngsgs
EENN 503450346:6: I Infnforormmatatiion ton tecechnolhnologogyy -- CCablabliing ng
iinsnsttalalllatatiion on -- TTeessttiing ofng of i insnsttalallled ced cablabliingng

Figure 1 - Schematic relationship between the EN 50173 series and other relevant standards

- 5 - EN 50174-2:2009/A2:2014

Replace Table 1 with the following Table:
Table 1  Contextual relationship between EN 50174 series
and other standards relevant for information technology cabling systems
Building design phase Generic cabling design Specification phase Installation phase Operation phase
phase
EN 50310 EN 50173 series EN 50174-1 EN 50174-1
except
EN 50173-4
6. Earthing networks 4: Structure 4: Requirements for 4: Requirements for
specifying installations of specifying installations of
5: Channel performance
information technology information technology
cabling cabling
7: Cable requirements
5: Requirements for
8: Connecting hardware
installers of information
requirements
technology cabling
9: Requirements for
cords and jumpers
A: Link performance
limits
Planning phase
and
EN 50173-4 EN 50174-2 EN 50174-2
4 and 5: Structure 4: Requirements for 5: Requirements for the
planning installations of installation of information
6: Channel performance
information technology technology cabling
cabling
8: Cable requirements
6: Segregation of
6: Segregation of metallic information
9: Connecting hardware
metallic information technology cabling and
requirements
technology cabling and power supply cabling
10: Requirements for
power supply cabling
8: Office (commercial)
cords and jumpers
7: Electricity distribution premises
A: Link performance systems and lightning
9: Industrial premises
limits protection
10: Homes
11: Data centres
12: Common infra-
structures within multi-
tenant premises
and and
EN 50174-3 EN 50174-3
and and
(for equipotential (for equipotential
bonding) bonding)
EN 50310 EN 50310
and
EN 50346
4: General requirements
5: Test parameters for
balanced cabling
6: Test parameters for
optical fibre cabling
2 Normative references
Amend reference to EN 50173-1:2007 to read EN 50173-1:2011.
Amend reference to EN 50491-6-1 to read:
EN 50491-6-1, General requirements for Home and Building Electronic Systems (HBES) and Building Automation and
Control Systems (BACS) - Part 6-1: HBES installations - Installation and planning
3 Terms, definitions and abbreviations
3.1 Terms and definitions
st
Amend the 1 sentence as follows:
For the purposes of this document, the terms and definitions given in EN 50174-1, EN 50310 and the following
apply.
Replace all occurrences of “NOTE” with “Note 1 to entry:”
Delete the following definitions and renumber all definitions accordingly (done in this Amendment as
applicable):
3.1.1
bonding network
3.1.4
common bonding network
3.1.15
isolated bonding network
3.1.18
meshed bonding network
3.1.24
primary distribution space
3.1.26
resistibility
Insert the following new definitions:
3.1.1
access provider
operator or another entity providing the means to enable external telecommunications service provision to a
subscriber
[SOURCE: EN 50700:2014, 3.1.1; EN 50174-3:2014, 3.1.2]
3.1.2
access provider space
location of access provider transmission and support equipment

- 7 - EN 50174-2:2009/A2:2014

Replace the existing definition 3.1.5 with the following one:
3.1.5
data centre
structure, or group of structures, dedicated to the centralized accommodation, interconnection and operation
of information technology and network telecommunications equipment providing data storage, processing and
transport services together with all the facilities and infrastructures for power distribution and environmental
control together with the necessary levels of resilience and security required to provide the desired service
availability
[SOURCE: EN 50600-1:2012, 3.1.9]
Replace the existing definition 3.1.9 with the following one (now 3.1.10):
3.1.10
entrance room
space within, or at the boundary of, a building housing the demarcation point where facilities owned by access
and/or service providers interface with the premises cabling
Note 1 to entry: For generic cabling in accordance with EN 50173-5, the demarcation point is the external network
interface (ENI) and the data centre cabling at that point is the network access cabling.
Insert the following new definitions and renumber where appropriate
3.1.6
distribution space
space within a home that corresponds to the installation space IS4 or IS5 of EN 50491-6-1 and that may
house the home distributor (secondary home distributor) of EN 50173-4 and associated equipment

3.1.14
hand hole
point of access to a pathway that is too small for a person to enter to perform work but that allows the routing
of cables during the cable installation process such that bending and pulling requirements are met
3.1.19
maintenance hole (telecommunications)
vault/chamber located in the ground earth as part of an underground conduit system and used to facilitate
placing, connectorization, 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
Replace the existing definition 3.1.20 with the following one:
3.1.21
multi-tenant building
building which is designed to accommodate more than one tenant each of which has their own tenant
entrance facility but share building entrance facilities (BEF) and associated distribution spaces
Insert the following new definitions:
3.1.25
primary building distribution space
space accommodating the main point of distribution of any common cabling infrastructure within multi-tenant
buildings
3.1.27
secondary building distribution space
space accommodating optional points of distribution, additional to the main point of distribution, of any
common cabling infrastructure within multi-tenant buildings

3.1.30
service provider
the operator of any service that furnishes telecommunications content (transmissions) delivered over access
provider facilities
Note 1 to entry: The access provider and the service provider can be a single entity
[SOURCE: EN 50700:2014, 3.1.20; EN 50174-3:2014, 3.1.15]
3.1.31
service provider space
location of service provider transmission and support equipment
3.1.33
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, 3.1.21]
3.1.35
tenant entrance facility
facility that provides all necessary mechanical and electrical services for the entry of telecommunications
cables into a tenants space and which may allow for transition from external to internal cable
4 Requirements for planning installations of information technology cabling
4.1.5 Cells and batteries
Amend the paragraph as follows:
If cells and batteries that produce gases and fumes (e.g. lead-acid batteries that produce hydrogen and
oxygen) are to be installed, provision shall be made for the necessary ventilation (see EN 60079-10-1:2009,
Clause 6) and recommended environmental conditions. Local regulations shall be complied with.
NOTE EN 60079-10-1 is being revised (currently circulated for CENELEC enquiry) and will contain more detailed
requirements regarding ventilation, once finalized.
4.1.6 Cable management systems
Replace the subclause as follows:
4.1.6 Pathways and pathway systems
The selection of pathways and pathway systems shall enable the installation of fire barriers, where required.
4.1.7 Closures
nd
Replace the 2 paragraph with the following one:
Alternatively, a single overall cover is allowed provided that the power supply cabling remains protected to
prevent electric shock after removal of the cover.
4.1.8.2 External cables containing flammable materials
Replace the text by the following:

- 9 - EN 50174-2:2009/A2:2014

Information technology cables that do not comply with the minimum recommended performance requirements
of EN 60332-1-2 shall be either:
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 or any length exceeding
2 m 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.
4.4 Pathway systems
4.4.1 Requirements
st
Amend the 1 paragraph as follows:
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). This may be achieved by the use of
pre-fabricated curved corners, drop-outs, radius limiters or other means. Where multiple cable types (and
bundled or dual/shot-gun types) are involved, the largest minimum bend radius shall apply.
Replace NOTE 2 as follows:
NOTE 2 This protrusion aids in preventing poured concrete and other constructions debris from entering the pathway
during construction, protects cabling from mechanical damage and protects cabling and fire-stop materials from water and
other liquid spills.
4.6 Closures
st
Insert the following text before the 1 paragraph:
The closures shall be large enough to allow management of the cable and cable elements to be
accommodated, taking into account the bend radius requirements defined in the instructions provided by the
telecommunications cable manufacturer and/or supplier. Where instructions are not available, the radius
applied to cable elements shall be the minimum of 30 mm or that of the cable, whichever is the greater.
Insert after subclause 4.7 the following new subclause and renumber existing subclause 4.8 into 4.9:
4.8 Filtering and electrical isolation components and surge protective devices
See A.3.
Amend 4.9 (former 4.8) to read:
Requirements and recommendations for the spaces in different types of premises are found in Clauses 8, 9,
10, 11 and 12.
Insert new subclause 4.10:
4.10 Planning for repair
The planning of the installation should take into account the procedures to be applied following damage to the
installed cabling - which is assumed to occur during the lifetime of an installation.
Planning options which address the practicality of repairs include:
a) the provision of resilience by means of cabling redundancy which affects the timescale within which a
repair may need to be effected;
b) the selection of pathway and pathway systems and/or the installation of service loops to simplify the
repair process;
c) the sub-division of the fixed cabling to introduce cable sections to simplify replacement of such sections
taking account of predicted operational access restrictions;
d) the allocation of performance margin to allow for the chosen repair procedures;
e) the maintenance of service provision by means of temporary repairs which precede the final corrective
action.
Where damage occurs, corrective actions include one or more of the following procedures:
− repair of damaged components;
− replacement of damaged components;
− installation of additional components to provide the required function.
The selection of the appropriate procedure shall take into account:
1) the available margin between the initial (i.e. pre-damaged) performance of the cabling and the
requirements of the service provided over the cabling;
2) the objectives of the user for the transmission performance of the cabling i.e. to maintain of the initial
performance (perhaps to support network evolution) or to allow for gradual degradation during repair(s)
subject to the available margin;
3) financial constraints taking into account the available margin and the objectives of the user;
4) the media and type of cables to be repaired;
5) practicality constraints;
6) time constraints which may be affected by a range of factors including the practicality constraints;
The user should ensure that documentation exists which defines contingency planning, procedures for fault
analysis and for initiating, monitoring and recording all repairs undertaken.
5 Requirements for the installation of information technology cabling
5.3.2 Pathways
th th
Replace the existing 5 and 6 paragraphs (amended within A1) with:
Where it is necessary, and relevant permission has been obtained, to open:
a) ceiling tiles, floor covers or trunking covers, only the minimum number shall be removed and these shall
be replaced on completion of works;
b) fire barriers and gas seals, they shall be opened only when necessary and resealed on completion of
works.
- 11 - EN 50174-2:2009/A2:2014

5.3.3.3.1 Requirements
rd
Amend 3 list item to read:
c) Figure 4 shows cable management systems crossing a wall at which a fire barrier is to be installed
following cable installation. Unless specifically allowed by local regulations, the fire-stop materials or fire-
stopping techniques, the cable management system shall be interrupted (with the smallest gap consistent
with the construction of the fire barrier and allowing for the thermal expansion of the cable management
system) and the two metallic sections shall be bonded. The bonds shall have performance in accordance
with EN 50310;
5.3.5.4 Requirements for closures
rd
Amend the 3 paragraph as follows:
The bend radii of telecommunications cables and telecommunications cable elements within closures shall be
in accordance with the instructions provided by the telecommunications cable manufacturer and/or supplier.
Where instructions are not available, the radius applied to cable elements shall be the minimum of 30 mm or
that of the cable, whichever is the greater.
5.4 Surge protective devices
Amend the paragraph as follows:
When surge protective devices are installed, special care shall be taken to ensure equipotential bonding of the
surge protective devices earth together with the main earth and the equipment’s earth in accordance with
installation requirements of HD 60364-5-534 and the EN 61643 series. See A.3.3 for additional information.
6 Segregation of metallic information technology cabling and power supply cabling
6.2.1 General segregation requirements
Amend Table 4, footnote d, as follows:
Screening performance (0 MHz to 100 MHz) equivalent to a steel conduit of 1,5 mm wall thickness. Separation specified is in addition to
that provided by any divider/barrier. The assumption underlying the material performance of the conduit is that the product of the
permeability and conductivity is greater than 38 H•S/m . This performance is not provided by stainless steel, aluminium and non-magnetic
materials.
6.2.2 Conditional relaxation of requirement
Amend the text as follows:
Where the requirements of Table 6 are not relevant then no segregation is required between information
technology cabling and power supply cabling where either
a) the information technology cabling is application(s)-specific and the application(s) support(s) a zero
segregation relaxation or
b) all the following conditions are met:
− the power supply conductors:
1) form only single phase circuits and either;
2a) the power conductors comprising a circuit are within an overall sheath and provide a total current
no greater than 100 A or;
2b) the power conductors comprising a circuit are twisted, taped or bundled together and provide a
total current no greater than 32 A;
− the environmental classification for the information technology cabling complies with E of
EN 50173-1:2011;
− the information technology cables meet the requirements of Segregation Classifications “b”, “c” or “d”
in accordance with Table 3.
8 Office (commercial) premises
8.3.3 Pathways
8.3.3.1.1 Requirements
Amend the text as follows:
A risk assessment shall be undertaken to determine the need for:
a) multiple access and/or service providers;
b) multiple access and/or service provider premises (i.e. operator sites or central offices);
c) diverse pathways from each of the access provider premises;
d) multiple BEFs;
e) multiple entrance rooms.
8.3.3.1.2 Recommendations
st
Amend the 1 paragraph as follows:
Where external service provision from multiple access providers is required, it should be ensured that the
pathways to the premises are diversely routed in order to eliminate any single point-of-failure.
th th
Amend the 4 and 5 paragraphs as follows:
The entrance pathways should also have adequate capacity to handle growth and additional access
providers.
Each access provider should enter the premises via at least two pathways. Pathways should be considered
between entrance rooms.
8.3.3.2.2 Recommendations
Amend bullet d) to read:
d) pathways should not be located where they will interfere with the intended operation of fire suppression
systems such as water distribution from sprinkler heads.

- 13 - EN 50174-2:2009/A2:2014

8.3.3.4.2 Recommendations
nd
In the English version, amend the 2 paragraph to read “drawbox”.
8.3.4.2.2 Recommendations
Replace the subclause as follows:
The size and quantity of all pathway systems should take into account the volume of cables to be contained at
maximum planned utilisation. Particular attention is required for adequate capacity of pathways at
intersections.
Separate pathway systems should be installed to segregate cabling that is permanently installed from that
which is less permanent such as equipment cords and patch cords.
Planning of overhead pathway systems for information technology cabling should be co-ordinated with
architects, mechanical engineers and electrical engineers that are designing lighting, plumbing, air ducts,
power supply and fire protection systems.
Overhead pathway systems may be stacked to provide additional capacity.
Overhead pathway systems should be suspended from the ceiling where increased operational flexibility is
required to:
a) support the use of cabinets, frames and racks of various heights;
b) add and/or remove cabinets, frames and racks.
If pathway systems are to be suspended from the ceiling, the ceiling should have a minimum hanging capacity
of 2,4 kPa.
Overhead pathway systems may be attached to the tops of cabinets, frames and racks where the cabinets,
frames or racks are of uniform height and are capable of supporting the additional loads of the cable
management systems and the installed cables.
Overhead pathway systems should not be placed directly below fire extinguishing systems.
Access floor systems, also known as raised floor systems, should be used for cabinets, frames or racks that
are to be cabled from below.
The routing of underfloor pathway systems should be co-ordinated with other underfloor infrastructures during
the planning stages of the building.
Information technology cabling under the access floor should be installed in pathway systems that do not
block airflow, where the under floor space form part of a ventilation or cooling system.
8.3.5.1.2 Recommendations
Replace text of subclause as follows:
No additional recommendations.

8.3.5.2.2 Recommendations
st
Delete 1 paragraph
8.3.8 Spaces
8.3.8.1 General
8.3.8.1.1 Requirements
nd
In the 2 paragraph, delete the words “by the premises owner”
8.3.8.2 Entrance rooms
8.3.8.2.1 Requirements
Amend text as follows:
The number and size of entrance rooms shall be determined taking into consideration:
a) cabling lengths for access and/or service providers circuits;
b) requirements for redundancy;
c) requirements for compartmentation between different access and/or service providers;
d) predicted requirements for:
1) entrance pathways for access provider and premises cabling (e.g. campus cabling for generic cabling
in accordance with the EN 50173 series);
2) backboard and frame space for termination of access provider and premises cabling;
3) access and/or service provider cabinets and racks to accommodate, as required;
4) space for the presentation of the cable terminations of the access providers;
5) space for the presentation of equipment ports;
6) surge protection devices.
Typical information necessary to determine the requirements for entrance rooms is shown in Table 7.

- 15 - EN 50174-2:2009/A2:2014

Table 7 – Environmental requirements for office premises
Information provided to service providers Information provided by service providers
General information concerning other uses of the building, Space and mounting requirements for surge protection
including other tenants equipment on incoming metallic cables
Plans and dimensions of entrance pathways from the —
boundary through demarcation point
Plans of entrance pathways from the boundary of the Quantity and dimensions of access provider racks and
premises to the entrance room, including location of cabinets
maintenance holes, hand-holes and draw-boxes
Floor plans for the BEF and entrance room Power requirements (including receptacle types) and
operating temperatures for equipment
Assigned location of the access and service providers Service clearances
protectors, cabinets, racks or frames
Cable pathways within entrance room (under access floor, Installation schedule
overhead cable ladders, other)
Requested location and interface for demarcation of each Service schedule
type of circuit to be provided by the service provider (for
generic cabling)
8.3.8.3.1 Requirements
th
Amend 4 paragraph to read:
Consideration shall also be given to the floor loadings generated through the transit of equipment and
associated infrastructure.
9 Industrial premises
9.3.8.1.1 Requirements
Amend text as follows:
The number and size of entrance rooms shall be determined taking into consideration:
a) cabling lengths for access and/or service providers circuits;
b) requirements for redundancy;
c) requirements for compartmentation between different access and/or service providers;
d) predicted requirements for:
1) entrance pathways for access provider and premises cabling (e.g. campus cabling for generic cabling
in accordance with the EN 50173 series);
2) backboard and frame space for termination of access provider and premises cabling;
3) access and/or service provider cabinets and racks to accommodate, as required;
4) space for the presentation of the cable terminations of the access providers;
5) space for the presentation of equipment ports;
6) surge protection devices.
Typical information necessary to determine the requirements for entrance rooms is shown in Table 8.

Table 8 – Environmental requirements for industrial premises
Information provided to service providers Information provided by service providers
General information concerning other uses of the building, Space and mounting requirements for surge protection
including other tenants equipment on incoming metallic cables
Plans and dimensions of entrance pathways from the —
boundary through demarcation point
Plans of entrance pathways from the boundary of the Quantity and dimensions of access provider racks and
premises to the entrance room, including location of cabinets
maintenance holes, hand holes and drawboxes
Floor plans for the BEF and entrance room Power requirements and operating temperatures of
equipment, including receptacle types
Assigned location of the access and service providers Service clearances
protectors, cabinets, racks or frames
Cable pathways within entrance room (under access floor, Installation schedule
overhead cable ladders, other)
Requested location and interface for demarcation of each Service schedule
type of circuit to be provided by the service provider (for
generic cabling)
10 Homes
10.3.8.7.1 Requirements
In the English version, replace the last paragraph by the following:
Also different media for transport of information require different type of equipment connection devices each
respecting special requirements, e. g. bend radius for optical fibre.
11 Data centres
11.2.2.2 Requirements
Amend bullet c) to read:
c) installation – fixed cables typically have greater bend radius than cords and this has to be reflected in
pathway and pathway system design and planning.
11.3.3 Pathways
11.3.3.1.1 Requirements
Amend text as follows:
A risk assessment shall be undertaken to determine the need for:
a) multiple access and/or service providers;
b) multiple access and/or service provider premises (i.e. operator sites or central offices);
c) diverse pathways from each of the access provider premises;

- 17 - EN 50174-2:2009/A2:2014

d) multiple BEFs;
e) multiple entrance rooms.
11.3.3.1.2 General recommendations
st
Amend the 1 paragraph as follows:
Where external service provision from multiple access providers is required, it should be ensured that the
pathways to the premises are diversely routed in order to eliminate any single point-of-failure.
th th
Amend the 4 and 5 paragraphs as follows and delete the last paragraph:
The entrance pathways should also have adequate capacity to handle growth and additional access
providers.
Each access provider should enter the premises via at least two pathways. Pathways should be considered
between entrance rooms.
11.3.3.2.2 General recommendations
Amend bullet d) to read:
d) pathways should not be located where they will interfere with the intended operation of fire suppression
systems such as water distribution from sprinkler heads.
11.3.3.4.2 General recommendations
nd
In the English version, replace “hand-holes” in the 2 paragraph with “hand holes”.
11.3.4.2.2 Recommendations
Replace subclause with the following:
The size and quantity of all pathway systems should take into account the volume of cables to be contained at
maximum planned utilisation. Particular attention is required for adequate capacity of pathways at
intersections.
Separate pathway systems should be installed to segregate cabling that is permanently installed from that
which is less permanent such as equipment cords and patch cords.
Overhead pathway systems alleviate the need for access floors in data centres. Overhead pathway systems
may be used to minimize airflow obstructions and turbulence under access floors caused by cabling and
associated pathway systems.
Overhead cable pathways may be used to supplement the floor-standing systems that are also cabled from
below.
Planning of overhead pathway systems for information technology cabling should be co-ordinated with
architects, mechanical engineers and electrical engineers that are designing lighting, plumbing, air ducts,
power supply and fire protection systems.
Overhead pathway systems may be stacked to provide additional capacity.

Overhead pathway systems should be suspended from the ceiling where increased operational flexibility is
required to:
a) support the use of cabinets, frames and racks of various heights;
b) add and/or remove cabinets, frames and racks.
If pathway systems are to be suspended from the ceiling, the ceiling should have a minimum hanging capacity
of 2,4 kPa.
Overhead pathway systems may be attached to the tops of cabinets, frames and racks where the cabinets,
frames or racks are of uniform height and are capable of supporting the additional loads of the cable
management systems and the installed cables.
Overhead pathway systems should not be placed directly below fire extinguishing systems.
Access floor systems, also known as raised floor systems, should be used for cabinets, frames or racks that
are to be cabled from below.
The routing of underfloor pathway systems should be co-ordinated with other underfloor infrastructures during
the planning stages of the building.
Information technology cabling under the access floor should be installed in pathway systems that do not
block airflow, where the under floor space form part of a ventilation or cooling system.
11.3.5.1.2 Recommendations
Replace text of subclause as follows:
No additional recommendations.
11.3.5.2.2 Recommendations
st
Delete the 1 paragraph
11.3.8 Spaces
11.3.8.1 General
11.3.8.1.1 Requirements
rd
In the 3 paragraph, delete the words “by the premises owner”
11.3.8.2 Entrance rooms
11.3.8.2.1 Requirements
Amend text as follows:
The number and size of entrance rooms shall be determined taking into consideration:
a) cabling lengths for access and/or service providers circuits;
b) requirements for redundancy (see 11.3.3.1.1);
c) requirements for compartmentation between different access and/or service providers;

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d) predicted requirements for:
1) entrance pathways for access provider and premises cabling (e.g. campus cabling for generic cabling
in accordance with the EN 50173 series);
2) backboard and frame space for termination of access provider and premises cabling;
3) access and/or service provider cabinets and racks to accommodate, as required;
4) space for the presentation of the cable terminations of the access providers;
5) space for the presentation of equipment ports;
6) surge protection devices.
Typical information necessary to determine the requirements for entrance rooms is shown in Table 12.
Table 12 – Environmental requirements for data centres
Information provided to service providers Information provided by service providers
General information concerning other uses of the building, Space and mounting requirements for surge protection
including other tenants equipment on incoming metallic cables
Plans and dimensions of entrance pathways from the —
boundary through demarcation point
Plans of entrance pathways from the boundary of the Quantity and dimensions of access provider racks and
premises to the entrance room, including location of cabinets
maintenance holes, hand-holes and draw-boxes
Floor plans for the BEF and entrance room Power requirements (including receptacle types) and
operating temperatures for equipment
Assigned location of the access and service providers Service clearances
protectors, cabinets, racks or frames
Cable pathways within entrance room (under access floor, Installation schedule
overhead cable ladders, other)
Requested location and interface for demarcation of each Service schedule
type of circuit to be provided by the service provider (for
generic cabling, EN 50173-5 specifies the external network
interface (ENI) of the network access cabling)

nd
Delete the following paragraph in 11.3.8.2.1 and insert it as 2 paragraph to 11.3.8.2.2:
If an entrance room is located in the computer room, the entrance pathways should be designed to avoid
interfering with airflow and any other cabling or service pathways under the access floor, where present.
11.3.8.3.1 Requirements
th
paragraph to read:
Amend 6
Consideration shall also be given to the floor loadings generated through the transit of equipment and
associated infrastructure.
Insert a new Clause 12:
12 Common infrastructures within multi-tenant buildings
12.1 General
This clause specifies amendments of, or additions to, the requirements and recommendation of the general
clauses of this standard as they apply to the common infrastructures within buildings constituting multi-tenant
buildings within which the individual tenant spaces may be commercial, industrial, residential or a mixture of
these uses.
The requirements and recommendations of this clause are applicable to all types of information technology
cabling including:
a) generic cabling systems designed in accordance with EN 50173 series standards;
b) application-specific network cabling.
12.3 addresses amendments of, or additions to, the requirements and recommendation of clause 4.
12.4 addresses amendments of, or additions to, the requirements and recommendation of clause 5.
12.5 addresses amendments of, or additions to, the requirements and recommendation of clause 6.
Within the
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