EN 50174-3:2003

STANDARDInformacijska tehnologija – Pokabljenje – 3. del: Načrtovanje inštalacij in tehnike dela zunaj zgradbInformation technology – Cabling installation – Part 3: Installation planning and practices outside buildings©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 50174-3:2005(en)ICS33.040.50; 35.110

EUROPEAN STANDARD
EN 50174-3 NORME EUROPÉENNE EUROPÄISCHE NORM
November 2003 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50174-3:2003 E
ICS 33.040.50; 35.110
English version
Information technology -
Cabling installation Part 3: Installation planning and practices outside buildings
Technologies de l'information -
Installation de câblage Partie 3: Planification et pratiques d'installation à l'extérieur des bâtiments
Informationstechnik -
Installation von Kommunikationsverkabelung Teil 3: Installationsplanung
und -praktiken im Freien
This European Standard was approved by CENELEC on 2003-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

Foreword This European Standard was prepared by Technical Committee CENELEC TC 215, Electrotechnical aspects of telecommunication equipment, under the framework of the Mandates M/212 on “Telecommunication cables and cabling systems“ and M/239 on “Air traffic management equipment and systems“.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50174-3 on 2003-09-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement
(dop)
2004-09-01 - latest date by which the national standards
conflicting with the EN have to be withdrawn
(dow)
2006-09-01 This standard comprises three parts. All three parts support the specification, implementation and operation of information technology cabling using both balanced copper and optical fibre cabling components. These components may be combined to provide cabling solutions either in accordance with the design requirements of series EN 50173 or to meet the requirements of one or more application-specific standards (such as EN 50098-1 or EN 50098-2). This part, EN 50174-3, contains detailed requirements and guidance relating to the installation planning and practices outside buildings and is intended to be used by the personnel directly involved in the planning and installation of information technology cabling. It shall be used during the different implementation phases when installing information technology cabling, i.e. during the planning phase, the design phase and installation phase. Annexes designated “informative” are given for information only.
In this standard, Annexes A and B are informative.

– 3 – EN 50174-3:2003 Content Introduction.7 1 Scope .9 2 Normative references.9 3 Definitions and abbreviations.10 3.1 Definitions.10 3.2 Abbreviations.11 4 Safety requirements.12 4.1 Prerequisite.12 4.2 Protection against electric shock.12 4.3 Protection from voltages due to the proximity of high voltage systems.13 4.4 Fire and chemical hazard.13 4.5 Explosive and asphyxiating gases.13 4.6 Optical fibre hazard.13 4.7 Mechanical hazard.13 4.8 Separation requirements for metallic cabling.13 4.9 Closures .13 5 General installation practices for metallic and optical fibre cabling.14 5.1 General .14 5.2 General precautions.15 5.3 Pre-installation practices.15 5.4 Preparation of cable routes.16 5.5 Cabling practices.17 5.6 Cable management systems.18 5.7 Labelling.19 5.8 Installation of closures.19 5.9 Segregation of services.20 5.10 Information technology cabling interconnections between buildings.27 5.11 Pole sharing.27 6 Additional installation practice for metallic cabling.31 6.1 EMC-Considerations.31 6.2 Balanced transmission.31 6.3 Screening.31 6.4 Mains and high voltage power distribution systems (above 1 000 V).31 6.5 Protection against very low frequency fields.31 6.6 Electrical isolation components.31 6.7 Surge protective devices.31 6.8 Protection against lightning.32 6.9 Protection against electrostatic discharge (ESD).32 6.10 Corrosion.33

6.11 Protection against radar emission and broadcast emitters.33 7 Additional installation practices for optical fibre cabling.34 7.1 General .34 7.2 Pre-installation procedures.34 7.3 Optical fibre cable practices.34 7.4 Final assembly of closures.34 7.5 Termination practices.34 7.6 Jointing/termination of optical fibres.35 7.7 Optical fibre management.36 8 Additional installation practices for specific sites and services.37 8.1 Hospitals.37 8.2 Airports .37 8.3 Nuclear areas.37 8.4 Explosive areas.38 8.5 Chemical manufacture /areas /plants.38 8.6 Tunnels and bridges including their associated services.38 8.7 Waterways, including rivers, canals, streams (natural or ducted / channelled etc.).38 8.8 Over-ground and underground railways.39 Annex A (informative)
Earth potential rise (EPR).42 Annex B (informative)
Typical examples of protection for information technology cabling.44 Bibliography.46

– 5 – EN 50174-3:2003 List of figures Figure 1 - Relationship between series EN 50174 and other design standards.8 Figure 2 - Examples of areas covered by this document.15 Figure 3 - Example showing the protection of underground information technology cables
when located next to power cables.21 Figure 4 - Distance between information technology cable and high voltage power lines.23 Figure 5 – Example of an underground cable duct entrance for information technology
cables into a building.25 Figure 6 - Example of the use of a galvanic isolation device.27 Figure 7 - Separation distances at the pole.29 Figure 8 - Separation distance at the poles with lighting devices.30 Figure 9 - Clearance not including components of information technology cabling for
standard gauge railways.40 Figure 10 - Clearance not included components of information technology cabling for
protection against falling contact wires.41 Figure A.1 - Definition of hot zone.42 Figure B.1 - Example of connection between inside and outside building.44 Figure B.2 - Example at main frame distributor.44 Figure B.3 - Example of non-equipotential zones.44 Figure B.4 - Example of a hot zone.
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