oSIST prEN 50174-3:2026

• Abstract:

  This document specifies requirements and provides recommendations for the following aspects of information technology cabling:; a) planning;; b) installation practice.; This document is applicable to all types of information technology cabling outside buildings including generic cabling systems designed in accordance with EN 50173 series. The requirements and recommendations of this document can be applied to cabling that is defined as part of the building.; The requirements and recommendations of Clauses 5, 6 and 7 of this document are subject to any site-specific requirements and recommendations of Clause 8.; The planning of the pathway systems, spaces and structures within the core and access network cabling as described in Figure 2 that are owned by access providers is excluded except for requirements and recommendations that provide basic safety, function and environmental objectives for mechanical, ingress and climatic characteristics (i.e. excluding pathway dimensions, distribution of spaces and similar constraints based on specific transmission methods).; The installation practices applicable to all cabling installation methods are included by the provision of the necessary planning requirements and recommendations associated with each one with the exception of information technology cabling installed:; – around or within aerial power supply or associated earth conductors;; – on infrastructures carrying power supplies in excess of AC/DC 25 kV.; This document:; 1) details the considerations for satisfactory installation and operation of information technology cabling;; 2) excludes specific requirements applicable to other cabling systems (e.g. power supply cabling); however, it takes account of the effects other cabling systems may have on the installation of information technology cabling (and vice versa) and gives general advice;; 3) excludes those aspects of installation associated with the transmission of signals in free space between transmitters, receivers or their associated antenna systems (e.g. wireless, radio, microwave or satellite).; This document is applicable to certain hazardous environments. It does not exclude additional requirements which are applicable in particular circumstances, defined by e.g. electricity supply and electrified railways.; The requirements within this document cover any additional requirements for the information technology cables installed in hazardous or stressful environments e.g. electricity supply and electric railway locations (see Clause 8).; Safety (electrical safety and protection, optical power, fire protection, etc.) and electromagnetic compatibility (EMC) requirements are outside the scope of this document and are covered by other standards and regulations. However, information given in this document can be of assistance in meeting these standards and regulations.; Examples of areas covered by this document are shown in Figure 2.

• Status: Not Published
• Public Enquiry End Date: 24-Sep-2026
• ICS: 33.040.50 - Lines, connections and circuits
• ICS: 35.110 - Networking
• Technical Committee: ELI - Electrical and communication installations
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 09-Jul-2026
• Due Date: 26-Nov-2026
• Ref Project: prEN 50174-3:2026 - Information technology - Cabling installation - Part 3: Installation planning and practices outside buildings

• Revises: SIST EN 50174-3:2014/A1:2017 - Information technology - Cabling installation - Part 3: Installation planning and practices outside buildings
• Effective Date: 28-May-2024
• Revises: SIST EN 50174-3:2014 - Information technology - Cabling installation - Part 3: Installation planning and practices outside buildings
• Effective Date: 28-May-2024

SLOVENSKI STANDARD
01-september-2026
Informacijska tehnologija – Kabelska inštalacija – 3. del: Načrtovanje inštalacij in
prakse zunaj zgradb
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: prEN 50174-3:2026
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 DRAFT
prEN 50174-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2026
ICS 35.110 Will supersede EN 50174-3:2013; EN 50174-
3:2013/A1:2017
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 draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-09-25.

It has been drawn up by CLC/TC 215.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 80035 Ref. No. prEN 50174-3:2026 E

Contents Page
1 European foreword . 5
2 Introduction . 6
3 1 Scope . 8
4 2 Normative references . 9
5 3 Terms, definitions and abbreviations . 11
6 3.1 Terms and definitions . 11
7 3.2 Abbreviations . 14
8 4 Conformance . 14
9 5 Requirements for planning installations of information technology cabling . 15
10 5.1 Safety . 15
11 5.2 Documentation . 16
12 5.3 Pathways . 16
13 5.4 Pathway systems . 26
14 5.5 Pathway systems other than for core and access networks . 31
15 5.6 Closures . 35
16 5.7 Cabling . 35
17 5.8 Spaces and structures . 37
18 5.9 Spaces and structures other than for core and access networks . 39
19 5.10 Planning for repair . 43
20 5.11 planning and assessment of cabling in support of remote powering . 44
21 5.12 Administration . 44
22 6 Requirements for the installation of information technology cabling . 44
23 6.1 Safety . 44
24 6.2 Documentation . 46
25 6.3 Installation practices . 46
26 6.4 Labelling . 60
27 6.5 Testing . 60
28 6.6 Contractual acceptance . 60
29 6.7 Operation . 60
30 7 Segregation . 61
31 7.1 General . 61
32 7.2 Segregation of underground information technology cabling . 61
33 7.3 Segregation of aerial information technology cabling . 65
34 7.4 Segregation with respect to specific sources of EMI . 69
35 8 Additional installation practices for specific sites and services . 70
36 8.1 Hospitals . 70
37 8.2 Airports. 70
38 8.3 Nuclear areas . 70
39 8.4 Chemical manufacturing areas . 71
40 8.5 Railways (overground and underground) . 71
41 Annex A (informative) Earth potential rise (EPR) . 75
42 A.1 General . 75
43 A.2 Limit of the hot zone . 75
44 A.3 Further information . 76
45 Annex B (informative) Application of responsibilities . 77
46 Annex C (informative) A-deviations . 81
47 Bibliography . 83
48 Figures
49 Figure 1 — Schematic relationship between EN 50174 series and other relevant documents . 7
50 Figure 2 — Examples of areas covered by this document . 9
51 Figure 3 — Example of cabling installations outside buildings . 17
52 Figure 4 – Examples of non-conformant and conformant bend limiting techniques . 28
53 Figure 5 — Cable arrangement in a metallic section . 30
54 Figure 6 — Example of wind vibration damper. 33
55 Figure 7 — Example of an underground conduit entrance for information technology cables into a
56 building . 41
57 Figure 8 — Example of the use of a galvanic isolation device . 42
58 Figure 9 —Continuity of metallic cable management systems . 49
59 Figure 10 — Interruption of metallic cable management systems at fire barriers . 50
60 Figure 11 — Example showing the protection of underground information technology cables when
61 located next to power supply cables . 62
62 Figure 12 — Separation of adjacent infrastructures . 66
63 Figure 13 — Separation distances on supporting structures . 67
64 Figure 14 — Separation distance on supporting structures with lighting devices . 68
65 Figure 15 — Clearance between information technology cabling and standard gauge railways. 72
66 Figure 16 — Clearances providing protection to information technology cabling against falling contact
67 wires . 74
68 Figure A.1 — Definition of hot zone . 75
69 Tables
70 Table 1 — Contextual relationship between EN 50174 series and other documents relevant for
71 information technology cabling systems . 7
72 Table 2 — Design and planning of underground pathways . 18
73 Table 3 — Requirements and recommendation for pathway depths below finished surface . 19
74 Table 4 — Design and planning of dedicated aerial pathways . 22
75 Table 5 — Minimum installed clearances above ground for aerial cables . 23
76 Table 6 — Stacking height for typical distances L . 29
77 Table 7 — Family and detailed specifications for external optical fibre cables . 36
78 Table 8 — Minimum distance between information technology cables and earthed electrodes of power
79 supply systems in rural and urban environments . 63
80 Table 9 — Minimum distance between information technology cables and earthed electrodes of power
81 systems in accordance with ITU-T K.8 . 64
82 Table 10 — Minimum clearances and protective measures at crossings between information technology
83 cables and various underground services . 64
84 Table 11 — Minimum clearances between aerial information technology and overhead power supply
85 cabling . 65
86 Table 12 — Example of limit distances . 69
87 Table A.1 — Minimum distance (HV installations less than 25 kV) . 76
88 Table A.2 — Minimum distance (HV installations exceeding 25 kV) . 76
89 Table B.1 — Responsibilities template . 77
90 Table B.2 — Example of completed responsibilities . 79
91 European foreword
92 This document (prEN 50174-3:2026) has been prepared by CLC/TC 215 “Electrotechnical aspects of
93 telecommunication equipment”.
94 This document is currently submitted to the Enquiry.
95 This document supersedes EN 50174-3:2013 and EN 50174-3 2013/A1:2017.
96 prEN 50174-3:2026 includes the following significant technical changes with respect to EN 50174-3:2013 and
97 EN 50174-3 2013/A1:2017:
98 a) the conformance requirements (previously subclause 1.2) have been moved into a new Clause 4 and the
99 existing clause numbers were updated accordingly;
100 b) references to EN 60794-3-50 and EN 60794-3-60 were deleted in Table 7, as these standards were
101 withdrawn;
102 c) requirements and recommendations for pathway systems (subclause 5.6) revised;
103 d) new subclause 5.11 on planning and assessment of cabling in support of remote powering added;
104 e) installation practices for pathways other than for care and access networks revised (subclauses 6.3.3 and
105 6.3.7);
106 f) segregation requirements in Clause 7 updated;
107 g) Annex A “EMC and protection” removed;
108 h) terminology, definitions and normative references aligned and updated with EN 50174-1 and EN 50174-2.
109 EN 50174 comprises four parts:
110 — EN 50174-1, Information technology — Cabling installation — Part 1: Installation specification and quality
111 assurance;
112 — EN 50174-2, Information technology — Cabling installation — Part 2: Installation planning and practices
113 inside buildings;
114 — EN 50174-3, Information technology — Cabling installation — Part 3: Installation planning and practices
115 outside buildings (the present document);
116 — EN 50174-4, Information technology — Cabling installation — Part 4: Testing of installed optical fibre
117 cabling.
118 There are specific requirements for cabling systems that are in accordance with the design requirements of
119 the EN 50173 series. However, the four parts also apply to cabling systems of any design including those in
120 accordance with standards such as EN 50700.
121 This part, EN 50174-3, is concerned with the planning and installation of information technology cabling using
122 metallic cabling and optical fibre cabling outside buildings; it is not confined to the border of a particular
123 premises and includes wide area information technology cabling of any kind. It provides guidance as to the
124 responsibilities of those involved and is intended to be referenced in relevant contracts.
125 Introduction
126 The importance of services delivered by information technology cabling infrastructure is similar to that of
127 utilities such as heating, lighting and electricity supplies. As with those utilities, interruptions to service can
128 have a serious impact. Poor quality of service due to lack of planning, use of inappropriate components,
129 incorrect installation, poor administration or inadequate support can threaten an organization’s effectiveness.
130 There are four phases in the successful implementation of information technology cabling. These are:
131 a) design;
132 b) specification – the detailed requirement for the cabling, including the planning of its accommodation and
133 associated building services addressing specific environments (e.g. electromagnetic, reaction to fire,
134 remote powering) together with the quality assurance requirements to be applied;
135 c) installation – in accordance with the requirements of the specification;
136 d) operation – the management of connectivity and the maintenance of transmission performance during the
137 life of the cabling.
138 EN 50174 series is in four parts and addresses the specification, installation, operational aspects of information
139 technology cabling and the testing of installed optical fibre cabling. The EN 50173 series and other application
140 standards cover design issues.
141 EN 50174-1, EN 50174-2 and EN 50174-3 are intended to be used by the personnel directly involved in the
142 planning aspects (of the specification phase) and the installation phase. EN 50174-2 is applicable inside
143 buildings and EN 50174-3 is applicable outside buildings. EN 50174-4 is applicable for testing of installed
144 optical fibre cabling.
145 EN 50174 series is also relevant to:
146 • architects, building designers and builders;
147 • main contractors;
148 • designers, suppliers, installers, inspectors (auditors), maintainers and owners of information technology
149 cabling;
150 • public network providers and local service providers;
151 • end users.
152 This document, EN 50174-3, contains requirements and recommendations relating to the installation planning
153 and practices by defining:
154 i) planning strategy (road map) and guidance depending on the application, electromagnetic environment,
155 building infrastructure and facilities, etc.;
156 ii) planning and installation requirements for metallic and optical fibre information technology cabling
157 depending on the application, electromagnetic environment, building infrastructure and facilities, etc.;
158 iii) the practices and procedures to be adopted to ensure that the cabling is installed in accordance with the
159 specification.
160 This document is applicable to all types of information technology cabling outside buildings, including generic
161 cabling systems designed in accordance with EN 50173 series. The requirements and recommendations of
162 this document can be applied to cabling that is defined as part of the building.
163 The planning of the pathway systems, spaces and structures within the core and access network cabling as
164 described in Figure 2 that are owned by access providers is excluded except for requirements and
165 recommendations that provide basic safety, function and environmental objectives for mechanical, ingress and
166 climatic characteristics (i.e. excluding pathway dimensions, distribution of spaces and similar constraints based
167 on specific transmission methods).
168 Figure 1 and Table 1 show the schematic and contextual relationships between the documents produced by
169 CLC/TC 215 for information technology cabling, namely:
170 1) this part and other parts of EN 50174 series;
171 2) generic cabling design (EN 50173 series);
172 3) application dependent cabling design (e.g. EN 50700);
173 4) bonding requirements (EN 50310) - the principles of which can be employed in installations outside
174 buildings.
176 Figure 1 — Schematic relationship between EN 50174 series and other relevant documents
177 Table 1 — Contextual relationship between EN 50174 series and other documents
178 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 50173-5
EN 50174-2
EN 50173-6 EN 50174-3 EN 50174-1
EN 50174-2
EN 50310
(these ENs
EN 50174-4 EN 50174-4
EN 50174-3
reference general
EN 50310
EN 50174-4
requirements of
EN 50173-1)
EN 50310
EN 50173-10
EN 50173-20
179 1 Scope
180 This document specifies requirements and provides recommendations for the following aspects of information
181 technology cabling:
182 a) planning;
183 b) installation practice.
184 This document is applicable to all types of information technology cabling outside buildings including generic
185 cabling systems designed in accordance with EN 50173 series. The requirements and recommendations of
186 this document can be applied to cabling that is defined as part of the building.
187 The requirements and recommendations of Clauses 5, 6 and 7 of this document are subject to any site-specific
188 requirements and recommendations of Clause 8.
189 The planning of the pathway systems, spaces and structures within the core and access network cabling as
190 described in Figure 2 that are owned by access providers is excluded except for requirements and
191 recommendations that provide basic safety, function and environmental objectives for mechanical, ingress and
192 climatic characteristics (i.e. excluding pathway dimensions, distribution of spaces and similar constraints based
193 on specific transmission methods).
194 The installation practices applicable to all cabling installation methods are included by the provision of the
195 necessary planning requirements and recommendations associated with each one with the exception of
196 information technology cabling installed:
197 – around or within aerial power supply or associated earth conductors;
198 – on infrastructures carrying power supplies in excess of AC/DC 25 kV.
199 This document:
200 1) details the considerations for satisfactory installation and operation of information technology cabling;
201 2) excludes specific requirements applicable to other cabling systems (e.g. power supply cabling); however,
202 it takes account of the effects other cabling systems may have on the installation of information technology
203 cabling (and vice versa) and gives general advice;
204 3) excludes those aspects of installation associated with the transmission of signals in free space between
205 transmitters, receivers or their associated antenna systems (e.g. wireless, radio, microwave or satellite).
206 This document is applicable to certain hazardous environments. It does not exclude additional requirements
207 which are applicable in particular circumstances, defined by e.g. electricity supply and electrified railways.
208 The requirements within this document cover any additional requirements for the information technology cables
209 installed in hazardous or stressful environments e.g. electricity supply and electric railway locations (see
210 Clause 8).
211 Safety (electrical safety and protection, optical power, fire protection, etc.) and electromagnetic compatibility
212 (EMC) requirements are outside the scope of this document and are covered by other standards and
213 regulations. However, information given in this document can be of assistance in meeting these standards and
214 regulations.
215 Examples of areas covered by this document are shown in Figure 2.
CCususttoommerer--sspecpeciiffiied ed
PPrrememiisseses B B PPrrememiisseses
ccablabliing betng betwween preen prememiisseses
boundarboundaryy
BBuiuilldidingng
BBuiuilldidingng--buibuillddiing ng
PPrrememiisseses A A
ccablabliing wng wiitthihinn
prprememiisseess bound boundararyy
BBuiuilldidingng BBuiuilldidingng
EExxtterernalnal c cablabliing ng wwiitthihinn
PPrrememiisseses
prprememiisseess bound boundarariieses
boundarboundaryy
AAccccesesss net netwwororkk
LOLOCC = = l lasastt oper operatatoror c cabiabinetnet
LOLOCC LOLOCC
OOperperatatoror OOperperatatoror
SSititee SSititee
CCorore nete netwwororkk
OOttherher
OOperperatatoror s siitteses
217 NOTE Pathways and spaces between premises A and B are assumed to be designed to meet specific networking
218 objectives, whereas the pathways and spaces between the premises boundary and the buildings in the premises, if
219 provided by the premises owner, are aimed to be more generic to meet the needs of multiple access providers and
220 transmission systems within their access networks.
221 Figure 2 — Examples of areas covered by this document
222 2 Normative references
223 The following documents, in whole or in part, are normatively referenced in this document and are
224 indispensable for its application. For dated references, only the edition cited applies. For undated references,
225 the latest edition of the referenced document (including any amendments) applies.
226 EN 124 (all parts), Gully tops and manhole tops for vehicular and pedestrian areas
227 EN 12613, Plastics warning devices for underground cables and pipelines with visual characteristics
228 EN 13501-6, Fire classification of construction products and building elements – Part 6: Classification using
229 data from reaction to fire tests on electric cables
230 EN 50173 (all parts), Information technology - Generic cabling systems
231 EN 50174-1, Information technology - Cabling installation - Part 1: Installation specification and quality
232 assurance
233 EN 50310, Telecommunications bonding networks for buildings and other structures
234 EN 50411-2-2, Fibre organisers and closures to be used in optical fibre communication systems - Product
235 specifications - Part 2-2: Sealed pan fibre splice closures Type 1, for category S & A
236 EN 50411-2-3, Fibre organisers and closures to be used in optical fibre communication systems - Product
237 specifications - Part 2-3: Sealed inline fibre splice closures Type 1, for category S & A
238 EN 50411-2-4, Fibre management systems and protective housings to be used in optical fibre communication
239 systems - Product specifications - Part 2-4: Sealed dome fibre splice closures for category S & A
240 EN 50411-2-5, Fibre organisers and closures to be used in optical fibre communication systems - Product
241 specifications - Part 2-5: Sealed closures for air blown fibre microduct, type 1, for category S & A
242 EN 50411-2-9, Fibre organisers and closures to be used in optical fibre communications systems - Product
243 specifications - Part 2-9: Non-sealed closures for air blown fibre microduct cable, for category S & A
244 EN IEC 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements (IEC 60079 0)
245 EN 60079-14, Explosive atmospheres - Part 14: Electrical installations design, selection and erection (IEC
246 60079 14)
247 EN IEC 60079-17, Explosive atmospheres - Part 17: Electrical installations inspection and maintenance (IEC
248 60079 17)
249 EN 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical flame
250 propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame (IEC 60332 1 2)
251 EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
252 EN IEC 60794-3, Optical fibre cables - Part 3: Outdoor cables - Sectional specification (IEC 60794 3)
253 EN 60794-3-10, Optical fibre cables - Part 3-10: Outdoor cables - Family specification for duct, directly buried
254 or lashed aerial optical telecommunication cables (IEC 60794 3 10)
255 EN 60794-3-11, Optical fibre cables - Part 3-11: Outdoor cables - Product specification for duct, directly buried
256 and lashed aerial single-mode optical fibre telecommunication cables (IEC 60794 3 11)
257 EN 60794-3-12, Optical fibre cables — Part 3-12: Outdoor cables — Detailed specification for duct and directly
258 buried optical telecommunication cables for use in premises cabling (IEC 60794-3-12)
259 EN 60794-3-20, Optical fibre cables - Part 3-20: Outdoor cables - Family specification for self-supporting aerial
260 telecommunication cables (IEC 60794 3 20)
261 EN 60794-3-21, Optical fibre cables - Part 3-21: Outdoor cables - Product specification for optical self-
262 supporting aerial telecommunication cables for use in premises cabling (IEC 60794 3 21)
263 EN 60794-3-30, Optical fibre cables - Part 3-30: Outdoor cables - Family specification for optical
264 telecommunication cables for lakes, river crossings and coastal application (IEC 60794 3 30)
265 EN 60794-3-40, Optical fibre cables — Part 3-40: Outdoor cables — Family specification for sewer cables and
266 conduits for installation by blowing and/or pulling in non-man accessible storm and sanitary sewers
267 (IEC 60794-3-40)
268 EN IEC 60794-4-20, Optical fibre cables - Part 4-20: Sectional specification - Aerial optical cables along
269 electrical power lines - Family specification for ADSS (all dielectric self-supported) optical cables (IEC 60794
270 4 20)
271 EN 60794-5-10, Optical fibre cables - Part 5–10: Family specification - Outdoor microduct optical fibre cables,
272 microducts and protected microducts for installation by blowing (IEC 60794 5 10)
273 EN 60794-5-20, Optical fibre cables - Part 5-20: Family specification - Outdoor microduct fibre units,
274 microducts and protected microducts for installation by blowing (IEC 60794 5 20)
275 EN 60825 (all parts), Safety of laser products (IEC 60825)
276 EN IEC 61084, Cable trunking systems and cable ducting systems for electrical installations – Part 1: General
277 requirements
278 EN IEC 61084-2, (all parts), Cable trunking systems and cable ducting systems for electrical installations
279 EN IEC 61300-3-35, Fibre optic interconnecting devices and passive components - Basic test and
280 measurement procedures - Part 3-35: Examinations and measurements - Visual inspection of fibre optic
281 connectors and fibre-stub transceivers
282 EN 61386-1, Conduit systems for cable management - Part 1: General requirements (IEC 61386 1)
283 EN 61386-2X, (all parts), Conduit systems for cable management — Part 2X: Particular requirements
284 (IEC 61386-2X series)
285 EN 61534 (all parts), Powertrack systems (IEC 61534)
286 EN 61537, Cable management - Cable tray systems and cable ladder systems (IEC 61537)
287 EN 61643 (all parts), Low-voltage surge protective devices (IEC 61643)
288 EN IEC 61969-1, Mechanical structures for electrical and electronic equipment - Outdoor enclosures - Part 1:
289 Design guidelines (IEC 61969 1)
290 EN 61969-2, Mechanical structures for electronic equipment - Outdoor enclosures - Part 2: Coordination
291 dimensions (IEC 61969 2)
292 HD 384, HD 60364 (all parts), Electrical installations of buildings / Low-voltage electrical installations
293 (IEC 60364 series)
294 HD 60364-4-444, Low-voltage electrical installations - Part 4-444: Protection for safety - Protection against
295 voltage disturbances and electromagnetic disturbances (IEC 60364 4 44:2007)
296 HD 60364-5-53, Low-voltage electrical installations - Part 5-53: Selection and erection of electrical equipment
297 - Switchgear and controlgear
298 EN IEC 62368-3, Audio/video, information and communication technology equipment - Part 3: Safety aspects
299 for DC power transfer through communication cables and ports (IEC 62368 3)
300 ITU-T K.68, Operator responsibilities in the management of electromagnetic interference by power systems
301 on telecommunication systems
302 3 Terms, definitions and abbreviations
303 3.1 Terms and definitions
304 For the purposes of this document, the terms and definitions given in EN 50174-1 and the following apply.
305 Where the cabling is designed in accordance with standards in EN 50173 series, the additional definitions of
306 those standards are applicable.
307 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
308 - IEC Electropedia: available at https://www.electropedia.org/
309 - ISO Online browsing platform: available at https://www.iso.org/obp
310 3.1.1
311 access network
312 functional elements (equipment and infrastructure) that enable communication between the core network and
313 a customer network
314 [SOURCE: CLC/TR 50173-99-2:2012, 3.1.1]
315 3.1.2
316 access provider
317 operator or another entity providing the means to enable external telecommunications service provision to a
318 subscriber
319 [SOURCE: EN 50700:2023, 3.1.3]
320 3.1.3
321 anchor wire
322 guy wire
323 tensioned cable designed to add stability to a supporting structure for information technology or other cabling
324 3.1.4
325 access point
326 location in pathways where access is intended to be provided
327 Note 1 to entry: Examples are maintenance holes, hand holes, buried closures and other spaces and structures.
328 3.1.5
329 campus
330 premises containing one or more buildings
331 [SOURCE: EN 50173-1:2018, 3.1.24]
332 3.1.6
333 catenary wire
334 wire hung at a specific tension between supporting structures for information technology cabling
335 3.1.7
336 core network
337 functional elements (that is equipment and infrastructure) that enable communication between operator sites
338 and/or network data centres
339 3.1.8
340 draw rope
341 a rope used for pulling cables through pathways
342 [SOURCE: EN 50174-2:202x, 3.1.6]
343 3.1.9
344 extraneous-conductive-part
345 conductive part not forming part of the power supply and liable to introduce an electric potential, generally the
346 electric potential of a local earth
347 [SOURCE: IEC 60050-826:2022, 826-12-11, IEC 60050-195:2021, 195-06-11]
348 3.1.10
349 hand hole
350 point off access to a pathway that is too small for a person to enter to perform work but that allows the routing
351 of cables during the cable installation process such that bending and pulling requirements are met
352 Note 1 to entry: An example of a hand hole within a building is called a draw-box.
353 3.1.11
354 high-voltage
355 voltage exceeding the conventionally adopted limit for low voltage (AC 1 000 V or DC 1 500 V)
356 [SOURCE: IEC 60050-195:2021, 195-05-25 and 195-05-26]
357 3.1.12
358 hot zone
359 area around a high-voltage installation (e.g. substation, transformer, pylon) whose earth potential rise in normal
360 operation or when an earth fault occurs, is over the limits given in ITU-T K.68 for typical fault situations
361 3.1.13
362 maintenance hole (for telecommunications)
363 vault/chamber as part of an underground conduit system and used to facilitate placing, connectorisation, and
364 maintenance of cables as well as the placing of associated equipment, in which it is expected that a person
365 will enter to perform work
366 3.1.14
367 parallel-earthing-conductor
368 conductor usually laid along the cable route to provide a low impedance connection between the earthing
369 arrangements at the ends of the cable route
370 Note 1 to entry: The term parallel earthing conductor is in common usage but for the purposes of this document it generally
371 acts as a bonding conductor.
372 [SOURCE: IEC 60050-195:2021, 195-02-29 modified – Note 1 to entry added]
373 3.1.15
374 power supply cabling
375 cabling whose primary purpose is the supply of electrical power
376 3.1.16
377 sacrificial pathway
378 pathway which has been selected while recognising that, due to its location, any cable(s) and/or pathway
379 system(s) installed within that pathway can be damaged by other trades
380 3.1.17
381 segregation
382 use of electrically conductive barriers or physical separation to prevent electromagnetic interference between
383 external noise sources, including power supply cabling, and information technology cabling
384 [SOURCE: EN 50174-2:202x, 3.1.26 modified – deleted the word “earthed”]
385 3.1.18
386 service provider
387 operator of any service that furnishes telecommunications content (transmissions) delivered over access
388 provider facilities
389 Note 1 to entry: The access provider and the service provider can be a single entity
390 [SOURCE: EN 50700:2023, 3.1.21]
391 3.1.19
392 stay
393 strut
394 device designed to add stability to a supporting structure for information technology or other cabling
395 3.1.20
396 subscriber
397 identifiable entity, and the space allocated to that entity, within the premises that may require a future direct
398 connection to the access network
399 [SOURCE: EN 50700:2023, 3.1.22 – modified: added “and the space allocated to that entity”]
400 3.1.21
401 surge protective device
402 device that is intended to protect the electrical apparatus from transient over-voltages and to divert surge
403 currents
404 Note 1 to entry: A surge protective device contains at least one nonlinear component.
405 [SOURCE: IEC 60050-614:2016, 614-03-48]
406 3.2 Abbreviations
407 For the purposes of this document, the abbreviations given in EN 50174-1 and the following apply.
408 Where the cabling is designed in accordance with standards in EN 50173 series, the additional abbreviations
409 of those standards are applicable.
AC Alternating Current
ADSS All Dielectric Self Supporting
BEF Building Entrance Facility
CMS Cable Management System
CSA Cross-Sectional Area
DC Direct Current
EMC Electromagnetic Compatibility
EMI Electromagnetic Interference
EPR Earth Potential Rise
ESD Electrostatic Discharge
ffs for further study
GPS Global Positioning System
HV high-voltage
LV low-voltage
PEC Parallel Earthing Conductor
SELV Safety Extra-Low Voltage
SPD Surge Protective Device
TNV Telecommunication Network Voltage
410 4 Conformance
411 For a cabling installation to conform to this document:
412 a) the planning of the installation shall meet the requirements of Clause 5;
413 b) the installation practices shall meet the requirements of Clause 6.
414 NOTE It is assumed that local regulations, if any, are met.
415 The responsibilities for specific elements of conformance may be made by national-specific amendment of
416 Annex B.
417 5 Requirements for planning installations of information technology cabling
418 5.1 Safety
419 5.1.1 Personnel
420 Internal procedures shall be in place to ensure that all persons are aware of:
421 a) the locations and boundaries of hazardous areas;
422 b) the procedures to be adopted when working in or in proximity to these hazardous areas;
423 c) fire precautions;
424 d) escape routes.
425 NOTE Local regulations can apply.
426 5.1.2 Low voltage electrical installation cabling
427 Electrical installations shall be undertaken in accordance with the HD 384/HD 60364 series.
428 NOTE Local regulations can apply.
429 5.1.3 Optical fibre cabling
430 The hazard classification of areas containing optical fibre information technology equipment and optical fibre
431 information technology cabling shall be undertaken in accordance with EN 60825-2 in order to define
432 appropriate installation and labelling practices.
433 5.1.4 Transmission and terminal equipment
434 Equipment specified during planning for connection to the information technology cabling shall comply with the
435 relevant product safety standards. Where that equipment can provide remote powering over the information
436 technology cabling it shall comply with EN IEC 62368-3.
437 5.1.5 Pathways and pathway systems
438 The selection of pathways and pathway systems shall enable the installation of fire barriers, if required.
439 5.1.6 Closures
440 Where both information technology cabling and power supply cabling are contained within a closure any
441 conductive material of the closure or internal barriers shall be treated in accordance with HD 384/HD 60364
442 series.
443 NOTE Local regulations can apply.
444 In addition:
445 a) a barrier (either conducting or non-conducting) shall be present between the two cable types which shall
446 meet a minimum of IP20 as specified in EN 60529;
447 b) covers on the closure shall allow separate access to the information technology cabling and the power
448 supply cabling and shall be retained such that the use of a tool is necessary to gain access thereby
449 preventing inadvertent connection between the power supply and the information technology cabling;
450 c) the entry for the information technology cables shall be separately removable.
...