SIST EN 50173-5:2018

SLOVENSKI STANDARD
SIST EN 50173-5:2018
01-oktober-2018
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SIST EN 50173-5:2008
SIST EN 50173-5:2008/A1:2011
SIST EN 50173-5:2008/A1:2011/AC:2011
SIST EN 50173-5:2008/A2:2013
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Information technology - Generic cabling systems - Part 5: Data centre spaces
Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 5:
Rechenzentrumsbereiche
Technologies de l'information - Systèmes de câblage générique - Partie 5: Espaces de
centres de traitement de données
Ta slovenski standard je istoveten z: EN 50173-5:2018
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
SIST EN 50173-5:2018 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50173-5:2018

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SIST EN 50173-5:2018


EUROPEAN STANDARD EN 50173-5

NORME EUROPÉENNE

EUROPÄISCHE NORM
June 2018
ICS 33.040.50 Supersedes EN 50173-5:2007
English Version
Information technology - Generic cabling systems - Part 5: Data
centre spaces
Technologies de l'information - Systèmes de câblage Informationstechnik - Anwendungsneutrale
générique - Partie 5: Espaces de centres de traitement de Kommunikationskabelanlagen - Teil 5:
données Rechenzentrumsbereiche
This European Standard was approved by CENELEC on 2018-03-19. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 50173-5:2018 E

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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
Contents Page
European foreword . 5
Introduction . 6
1 Scope and conformance . 9
1.1 Scope . 9
1.2 Conformance . 9
2 Normative references . 10
3 Terms, definitions and abbreviations . 10
3.1 Terms and definitions . 10
3.2 Abbreviations . 12
4 Structure of the generic cabling system in computer room spaces of data centres . 12
4.1 General. 12
4.2 Functional elements . 12
4.3 Structure and hierarchy . 13
4.4 Cabling subsystems . 14
4.4.1 Data centre cabling subsystems . 14
4.4.2 Associated cabling subsystems . 15
4.5 Design objectives . 16
4.5.1 General. 16
4.5.2 Zone distribution cabling . 16
4.5.3 Intermediate distribution cabling . 16
4.5.4 Main distribution cabling . 16
4.5.5 Network access cabling . 16
4.5.6 Tie cabling . 17
4.6 Accommodation of functional elements . 18
4.6.1 General. 18
4.6.2 Equipment Outlets . 18
4.6.3 Distributors . 18
4.6.4 Cables . 18
4.6.5 Local Distribution Points . 18
4.6.6 External Network Interface . 18
4.7 Interfaces . 18
4.7.1 Equipment interfaces and test interfaces . 18
4.7.2 Channels and links . 20
4.8 Dimensioning and configuration . 20
4.8.1 Distributors . 20
4.8.2 Cables . 20
4.8.3 Connecting hardware . 20
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
4.8.4 Cords. 20
4.8.5 Equipment Outlets and Local Distribution Points . 21
4.8.6 External Network Interface . 21
5 Channel performance in computer room spaces of data centres . 22
5.1 General. 22
5.2 Environmental performance . 23
5.3 Transmission performance. 23
5.3.1 General. 23
5.3.2 Balanced cabling . 23
5.3.3 Optical fibre cabling . 24
6 Reference implementations in computer room spaces of data centres . 24
6.1 General. 24
6.2 Balanced cabling . 24
6.2.1 General. 24
6.2.2 Zone distribution cabling . 24
6.2.3 Intermediate distribution cabling . 29
6.2.4 Main distribution cabling . 30
6.2.5 Network access cabling . 32
6.3 Optical fibre cabling . 34
6.3.1 General. 34
6.3.2 Component choice . 35
6.3.3 Dimensions . 35
7 Cable requirements in computer room spaces of data centres . 35
7.1 General. 35
7.2 Balanced cables of Category 5, 6, 6A, 7, 7A, 8.1 and 8.2. 35
7.3 Optical fibre cables of Category OM3, OM4, OM5, OS1a and OS2 . 35
8 Connecting hardware requirements in computer room spaces of data centres . 35
8.1 General requirements . 35
8.2 Balanced connecting hardware . 36
8.2.1 General requirements . 36
8.2.2 Electrical, mechanical and environmental performance . 36
8.3 Optical fibre connecting hardware . 36
8.3.1 General requirements . 36
8.3.2 Optical, mechanical and environmental performance . 37
9 Requirements for cords and jumpers in computer room spaces of data centres . 37
9.1 Jumpers . 37
9.2 Balanced cords of Category 5, 6, 6A, 7, 7A, 8.1 and 8.2 . 37
9.2.1 General. 37
9.2.2 Additional requirements for certain cords . 37
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
9.3 Optical fibre cords of Category OM3, OM4, OM5, OS1a and OS2 . 37
Annex A (normative) Link performance limits. 38
A.1 General. 38
A.2 Balanced cabling . 39
A.3 Optical fibre cabling . 39
Annex B (normative) Usage of high density connecting hardware within optical fibre cabling . 40
B.1 General. 40
B.2 Examples of cabling configurations using high density connecting hardware . 40
B.3 Channel performance . 40
Annex C (normative) Combination of balanced cabling links . 43
C.1 General. 43
C.2 Requirements . 43
Bibliography . 44
Figures
Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards . 7
Figure 2 — Structure of generic cabling . 13
Figure 3 — Hierarchical topology of generic cabling . 14
Figure 4 — Examples of cabling implementation to improve reliability . 17
Figure 5 — Example of accommodation of functional elements. 18
Figure 6 — Test and equipment interfaces . 19
Figure 7 — The External Network Interface . 21
Figure 8 — Example of a channel . 22
Figure 9 — Example of a system showing the location of cabling interfaces . 23
Figure 10 — Zone distribution cabling models . 27
Figure 11 — Intermediate distribution cabling model . 29
Figure 12 — Main distribution cabling model. 31
Figure 13 — Network access cabling model . 33
Figure A.1 — Link options . 38
Figure B.1 — Examples of high density connecting hardware within main distribution cabling . 41
Figure B.2 — Examples of high density connecting hardware at the LDP and EO within zone
distribution cabling . 42
Figure C.1 — Examples of combination of different links . 43
Tables
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems . 7
Table 2 — Zone distribution channel equations . 28
Table 3 — Intermediate distribution channel equations . 30
Table 4 — Main distribution channel equations . 32
Table 5 — Network access cabling channel equations . 34
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
European foreword
This document (EN 50173-5:2018) has been prepared by the Technical Committee CENELEC TC 215
"Electrotechnical aspects of telecommunication equipment".
The following dates are fixed:
• latest date by which this document has (dop) 2019-03-19
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-03-19
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50173-5:2007 + A1:2010 + AC:2011 + A2:2012.
The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the
application-independent cabling to support ICT applications in office premises. Their basic principles,
however, are applicable to other types of applications and in other types of premises.
TC 215 has decided to establish relevant European Standards which address the specific requirements of
these premises. In order to point out the commonalities of these cabling design standards, these EN are
published as individual parts of the series EN 50173, thus also acknowledging that standards users recognize
the designation “EN 50173” as a synonym for generic cabling design.
At the time of publication of this European Standard, series EN 50173 comprises the following standards:
EN 50173-1 Information technology — Generic cabling systems — Part 1: General requirements
EN 50173-2 Information technology — Generic cabling systems — Part 2: Office spaces
EN 50173-3 Information technology — Generic cabling systems — Part 3: Industrial spaces
EN 50173-4 Information technology — Generic cabling systems — Part 4: Homes
EN 50173-5 Information technology — Generic cabling systems — Part 5: Data centre spaces
EN 50173-6 Information technology — Generic cabling systems — Part 6: Distributed building
services
This edition of EN 50173-5:
a) introduces new components 8.1 and 8.2 for balanced cabling to support new channel Classes I and II as
well as optical fibre cabling (OM5) as defined in EN 50173-1:2018;
b) clarifies that the cabling defined in this standard applies to computer rooms in data centres;
c) aligns the document structure across the EN 50173 series and updates the document both technically
and editorially.
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
Introduction
The importance of cabling infrastructure is similar to that of other fundamental utilities such as water and
energy supply and interruptions to the services provided over that infrastructure can have a serious impact. A
lack of design foresight, the use of inappropriate components, incorrect installation, poor administration or
inadequate support can threaten quality of service and have commercial consequences for all types of users.
This standard specifies generic cabling within computer room spaces in data centre premises, or data centre
spaces within other types of building.
Additionally those premises can include:
— office spaces for which generic cabling is specified in EN 50173-2;
— industrial spaces for which generic cabling is specified in EN 50173-3.
Generic cabling for distributed building services in data centre spaces is specified in EN 50173-6 which
addresses all of the above premises and spaces within them.
Figure 1 and Table 1 show the schematic and contextual relationships between the standards produced by
TC 215 for information technology cabling, namely:
1) this and other parts of the EN 50173 series;
2) installation (EN 50174 series);
3) bonding (EN 50310).
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)

Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards
Table 1 — Contextual relationship between EN 50173 series and other standards relevant for
information technology cabling systems
Building design Generic cabling Specification Installation Operation phase
phase design phase phase 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 50173-6
EN 50174-2
EN 50310
EN 50174-3
(these ENs
EN 50310
reference general
requirements of
EN 50173-1)
In addition, a number of Technical Reports have been developed to support or extend the application of these
standards, including:
— CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T;
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
— CLC/TR 50173-99-2, Information technology — Implementation of BCT applications using cabling in
accordance with EN 50173-4;
— CLC/TR 50173-99-3, Information technology — Generic cabling systems — Part 99-3: Home cabling
infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of
applications.
In addition, a number of cabling design standards have been developed using components of EN 50173-1
(e.g. EN 50098 series and EN 50700).
The generic cabling specified by this standard provides users with:
— an application independent system capable of supporting a wide range of applications in a range of
installation and operating environments;
— a flexible scheme such that modifications are both easy and economical;
— a multi-vendor supply chain within an open market for cabling components.
In addition this standard provides:
a) relevant industry professionals with guidance allowing the accommodation of cabling before specific
requirements are known; i.e. in the initial planning either for construction or refurbishment and for further
deployment as the requirements of areas are defined;
b) industry and standardization bodies with a cabling system which supports current products and provides
a basis for future product development and applications standardization.
Applications addressed in this standard include those developed by the Technical Committees of IEC
(including the subcommittees of ISO/IEC JTC 1) and study groups of ITU-T within the densely connected
environment of data centre spaces.
Physical layer requirements for the applications listed in EN 50173-1:2018, Annex F, have been analysed to
determine their compatibility with the cabling performance specified in this standard and, together with
statistics concerning premises geography from different countries and the models described in Clause 4,
have been used to develop the requirements for cabling components and to stipulate their arrangement into
cabling systems.
As a result, this standard:
a) specifies a structure for generic cabling supporting a wide variety of applications including, but not
restricted to, those in EN 50173-1:2018, Annex F;
b) adopts balanced cabling channel and link Classes EA, F, FA, I and II specified in EN 50173-1;
c) adopts optical fibre cabling channel and link requirements specified in EN 50173-1;
d) adopts component requirements, specified in EN 50173-1, and specifies cabling implementations that
ensures performance of links and of channels meeting the requirements of a specified group (e.g. Class)
of applications.
Life expectancy of generic cabling systems can vary depending on environmental conditions, supported
applications, aging of materials used in cables, and other factors such as access to pathways (campus
pathways are more difficult to access than building pathways).
With appropriate choice of components, generic cabling systems meeting the requirements of this standard
are expected to have a life expectancy of at least ten years.
This document should be read in conjunction with EN 50600-2-4 which describes other aspects of
telecommunications cabling in the computer room and other spaces of data centres.
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SIST EN 50173-5:2018
EN 50173-5:2018 (E)
1 Scope and conformance
1.1 Scope
This standard specifies generic cabling within computer room spaces in data centre premises, or data centre
spaces within other types of building.
It covers balanced cabling and optical fibre cabling.
This standard specifies directly or via reference to EN 50173-1 the:
— structure and minimum configuration for generic cabling within data centre spaces;
— interfaces at the external network interface (ENI) and equipment outlet (EO);
— performance requirements for cabling links and channels;
— implementation requirements and options;
— performance requirements for cabling components;
— conformance requirements and verification procedures.
This standard has taken into account requirements specified in application standards listed in EN 50173-1.
Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this standard and are
covered by other standards and regulations. However, information given in this standard can be of assistance
in meeting these standards and regulations.
1.2 Conformance
For a cabling installation to conform to this standard the following applies.
a) The configuration and structure shall conform to the requirements of Clause 4.
b) Channels shall meet the requirements of Clause 5.
This shall be achieved by one of the following:
1) a channel design and implementation ensuring that the prescribed channel performance of Clause 5
is met;
2) attachment of appropriate components to a permanent link or LDP link design meeting the
prescribed performance class of Annex A. Channel performance shall be ensured where a channel
is created by adding more than one cord to either end of a link meeting the requirements of
Annex A;
3) for E environments, using the reference implementations of Clause 6 and compatible cabling
1
components conforming to the requirements of Clauses 7, 8 and 9 based upon a statistical
approach of performance modelling.
c) The interfaces to the cabling at the EO and ENI shall conform to the requirements of Clause 8 with
respect to mating interfaces and performance.
d) Connecting hardware at other places in the cabling structure shall meet the performance requirements
specified in Clause 8 independent of the interface used.
e) The requirements of EN 50174
...