IEC 60728-11:2023
(Main)Cable networks for television signals, sound signals and interactive services - Part 11: Safety
Cable networks for television signals, sound signals and interactive services - Part 11: Safety
IEC 60728-11:2023 deals with the safety requirements applicable to fixed sited systems and equipment. As far as applicable, it is also valid for mobile and temporarily installed systems, for example, caravans. Additional requirements may be applied, for example, referring to:
- electrical installations of buildings and overhead lines,
- other telecommunication services distribution systems,
- water distribution systems,
- gas distribution systems,
- lightning systems.
This document is intended to provide requirements specifically for the safety of the system, personnel working on it, subscribers and subscriber equipment. It deals only with safety aspects and is not intended to define a standard for the protection of the equipment used in the system. IEC 60728-11:2023 cancels and replaces the fourth edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition.
a) Replacement of references to IEC 60065 and IEC 60950-1 with references to IEC 62368-1.
b) Addition of subclauses 4.4 to 4.6.
c) Revised definition of class I equipment, class II equipment, main earthing terminal, see 3.1.6, 3.1.8 and 3.1.31.
d) Addition of definitions for harm, hazard, ordinary person, instructed person, skilled person, see 3.1.22, 3.1.23, 3.1.39, 3.1.40 and 3.1.41.
e) Additional requirement to provide details on the equipment installed, see 4.1.
f) Additional mechanical, design and construction requirements, see 4.2.2.
g) Changes to the accessible part requirements, see 4.2.3.
h) The current carrying capacity and dielectric strength of components is now obligatory, see 8.1.3.
i) The assessment of the risk of lightning strike is now obligatory, see Figure 10.
j) Extension of remote feeding voltage on subscriber feeder, see Table 1.
Réseaux de distribution par câbles pour signaux de télévision, signaux de radiodiffusion sonore et services interactifs – Partie 11: Sécurité
L'IEC 60728-11:2023 traite des exigences de sécurité applicables aux systèmes et matériels fixes. S'il y a lieu, elle couvre également les systèmes mobiles et provisoires, par exemple les caravanes.
Des exigences supplémentaires peuvent s'appliquer, par exemple, pour:
• les installations électriques des bâtiments et les lignes aériennes;
• les autres réseaux de distribution de services de télécommunications;
• les réseaux de distribution d'eau;
• les réseaux de distribution de gaz;
• les systèmes de protection contre la foudre.
Le présent document a pour objet de fournir des exigences spécifiques à la sécurité du système, du personnel qui travaille sur celui-ci, ainsi que des abonnés et des équipements de l'abonné. Il traite uniquement des aspects de sécurité et n'a pas pour objet de définir une norme pour la protection des matériels utilisés dans le système.
L'IEC 60728-11:2023 annule et remplace la quatrième édition parue en 2016. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les références à l'IEC 60065 et à l'IEC 60950-1 ont été remplacées par des références à l'IEC 62368-1;
b) des paragraphes ont été ajoutés (4.4 à 4.6);
c) les définitions pour les termes matériel de classe I, matériel de classe II et borne principale de terre ont été révisées (voir le 3.1.6, le 3.1.8 et le 3.1.31);
d) des définitions ont été ajoutées pour les termes dommage, danger, personne ordinaire, personne avertie et personne qualifiée (voir le 3.1.22, le 3.1.23, le 3.1.39, le 3.1.40 et le 3.1.41);
e) des exigences ont été ajoutées pour fournir des détails sur le matériel installé (voir le 4.1);
f) des exigences mécaniques, de conception et de construction ont été ajoutées (voir le 4.2.2);
g) les exigences relatives aux parties accessibles ont été modifiées (voir le 4.2.3);
h) le courant admissible et la rigidité diélectrique des composants sont désormais obligatoires (voir le 8.1.3);
i) l'appréciation du risque de foudre est désormais obligatoire (voir la Figure 10);
j) la tension de téléalimentation sur la liaison de connexion d'abonné a été étendue (voir le Tableau 1).
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IEC 60728-11 ®
Edition 5.0 2023-02
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
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IEC 60728-11 ®
Edition 5.0 2023-02
INTERNATIONAL
STANDARD
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060.40 ISBN 978-2-8322-6470-6
– 2 – IEC 60728-11:2023 © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, symbols and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Symbols . 18
3.3 Abbreviated terms . 18
4 Fundamental requirements . 19
4.1 General . 19
4.2 Mechanical requirements . 20
4.2.1 General . 20
4.2.2 Equipment design and construction . 20
4.2.3 Accessible parts . 20
4.3 Radiation . 20
4.4 Electromagnetic radiation. 20
4.5 Thermal protection . 20
4.6 Safety in case of fire and fire reaction . 20
5 Protection against environmental influences . 21
6 Equipotential bonding and earthing . 21
6.1 General requirements . 21
6.2 Equipotential bonding mechanisms . 21
6.3 Equipotential bonding in meshed systems . 32
6.3.1 References to other standards . 32
6.3.2 General on AC mains . 32
6.3.3 AC power distribution and connection of the protective conductor . 32
6.3.4 Dangers and malfunction . 32
6.3.5 Measures. 33
7 Mains-supplied equipment . 33
8 Remote power feeding in cable networks . 34
8.1 Remote power feeding . 34
8.1.1 Maximum allowed voltages . 34
8.1.2 General requirements for equipment . 34
8.1.3 Current-carrying capacity and dielectric strength of the components . 34
8.2 Remote powering from subscriber premises . 35
9 Segregation distances and protection against indirect contact to electric power
distribution systems . 35
9.1 General . 35
9.2 Overhead lines . 35
9.2.1 Overhead lines up to 1 000 V. 35
9.2.2 Overhead lines above 1 000 V . 35
9.3 House installations up to 1 000 V . 35
10 System outlets and transfer points . 36
10.1 General . 36
10.2 System outlet . 36
10.2.1 Types of system outlets . 36
10.2.2 Fully isolated system outlet . 37
10.2.3 Semi-isolated system outlet . 37
10.2.4 Non-isolated system outlet with protective element . 37
10.2.5 Non-isolated system outlet without protective element . 37
10.2.6 Fully-isolated system outlet provided by means of a FTTH system . 37
10.3 Transfer point . 39
11 Protection against atmospheric overvoltages and elimination of potential
differences . 40
11.1 General . 40
11.2 Protection of the antenna system . 41
11.2.1 Selection of appropriate methods for protection of antenna systems . 41
11.2.2 Building equipped with a lightning protection system (LPS). 42
11.2.3 Building not equipped with an LPS . 49
11.3 Earthing and bonding of the antenna system . 52
11.3.1 Internal protection system . 52
11.3.2 Earthing conductors . 53
11.3.3 Earth termination system . 55
11.4 Overvoltage protection . 59
12 Mechanical stability . 60
12.1 General requirements . 60
12.2 Bending moment . 60
12.3 Wind-pressure values . 62
12.4 Mast construction . 62
12.5 Data to be published . 63
Annex A (normative) Earth loop impedance . 64
A.1 General . 64
A.2 Earthing for fault conditions . 64
A.3 Earthing to protect against hazardous touch voltage . 65
A.4 Temporary safety measures . 66
Annex B (informative) Use of shield wires to protect installations with coaxial cables . 67
B.1 General . 67
B.2 Soil quality determines shield-wiring necessity . 67
B.3 Protective measures against direct lightning strikes on underground cables . 67
Annex C (informative) Differences in some countries . 70
C.1 Subclause 6.1 . 70
C.1.1 France . 70
C.1.2 Japan . 70
C.2 Subclause 6.2 . 70
C.2.1 France . 70
C.2.2 Norway . 70
C.2.3 Japan and Poland . 70
C.3 Subclause 6.3 – Norway . 70
C.3.1 Justification . 70
C.3.2 Equipotential bonding mechanism for cable networks . 71
C.3.3 Use of galvanic isolation in a cable network with remote power feeding . 76
C.3.4 Use of voltage dependent protective device in a cable network . 77
C.4 Subclause 8.1.1 – Japan . 78
C.5 Subclause 9.1 – France . 79
– 4 – IEC 60728-11:2023 © IEC 2023
C.6 Subclause 9.2 – Japan . 79
C.7 Subclause 10.1 . 79
C.7.1 Sweden . 79
C.7.2 UK .
...
IEC 60728-11 ®
Edition 5.0 2023-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60728-11 ®
Edition 5.0 2023-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.060.40 ISBN 978-2-8322-6530-7
– 2 – IEC 60728-11:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 2
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, symbols and abbreviated terms . 11
3.1 Terms and definitions . 12
3.2 Symbols . 20
3.3 Abbreviated terms . 21
4 Fundamental requirements . 22
4.1 General . 22
4.2 Mechanical requirements . 22
4.2.1 General . 22
4.2.2 Equipment design and construction . 22
4.2.3 Accessible parts . 23
4.4 Laser radiation .
4.3 Radiation . 23
4.4 Electromagnetic radiation. 23
4.5 Thermal protection . 23
4.6 Safety in case of fire and fire reaction . 23
5 Protection against environmental influences . 23
6 Equipotential bonding and earthing . 23
6.1 General requirements . 23
6.2 Equipotential bonding mechanisms . 24
6.3 Equipotential bonding in meshed systems . 38
6.3.1 References to other standards . 38
6.3.2 General on AC mains . 38
6.3.3 AC power distribution and connection of the protective conductor . 38
6.3.4 Dangers and malfunction . 38
6.3.5 Measures. 39
7 Mains-supplied equipment . 39
8 Remote power feeding in cable networks . 39
8.1 Remote power feeding . 40
8.1.1 Maximum allowed voltages . 40
8.1.2 General requirements for equipment . 40
8.1.3 Current-carrying capacity and dielectric strength of the components . 40
8.2 Remote powering from subscriber premises . 41
9 Segregation distances and protection against indirect contact and proximity to
electric power distribution systems . 41
9.1 General . 41
9.2 Overhead lines . 42
9.2.1 Overhead lines up to 1 000 V. 42
9.2.2 Overhead lines above 1 000 V . 42
9.3 House installations up to 1 000 V . 42
10 System outlets and transfer points . 42
10.1 General . 42
10.2 System outlet . 43
10.2.1 Types of system outlets . 43
10.2.2 Fully isolated system outlet . 43
10.2.3 Semi-isolated system outlet . 43
10.2.4 Non-isolated system outlet with protective element . 43
10.2.5 Non-isolated system outlet without protective element . 44
10.2.6 Fully-isolated system outlet provided by means of a FTTH system . 44
10.3 Transfer point . 46
11 Protection against atmospheric overvoltages and elimination of potential
differences . 47
11.1 General . 47
11.2 Protection of the antenna system . 48
11.2.1 Selection of appropriate methods for protection of antenna systems . 48
11.2.2 Building equipped with a lightning protection system (LPS). 49
11.2.3 Building not equipped with an LPS . 60
11.3 Earthing and bonding of the antenna system . 66
11.3.1 Internal protection system . 66
11.3.2 Earthing conductors . 66
11.3.3 Earth termination system . 69
11.4 Overvoltage protection . 72
12 Mechanical stability . 73
12.1 General requirements . 73
12.2 Bending moment . 73
12.3 Wind-pressure values . 75
12.4 Mast construction . 75
12.5 Data to be published . 76
Annex A (informativenormative) Earth loop impedance . 77
A.1 General . 77
A.2 Earthing for fault conditions . 77
A.3 Earthing to protect against hazardous touch voltage . 78
A.4 Temporary safety measures . 79
Annex B (informative) Use of shield wires to protect installations with coaxial cables . 80
B.1 General . 80
B.2 Soil quality determines shield-wiring necessity . 80
B.3 Protective measures against direct lightning strikes on underground cables . 80
Annex C (informative) Differences in some countries . 83
C.1 Subclause 6.1 . 83
C.1.1 France . 83
C.1.2 Japan . 83
C.2 Subclause 6.2 . 83
C.2.1 France . 83
C.2.2 Norway . 83
C.2.3 Japan and Poland . 83
C.3 Subclause 6.3 – Norway . 83
C.3.1 Justification . 83
C.3.2 Equipotential bonding mechanism for cable networks . 84
C.3.3 Use of galvanic isolation in a cable network with remote power feeding . 90
C.3.4 Use of voltage dependent protective device in a cable network . 91
C.4 Subclause 8.1.1 – Japan . 92
– 4 – IEC 60728-11:2023 RLV © IEC 2023
C.5 Subclause 9.1 – France . 93
C.6 Subclause 9.2 – Japan . 93
C.7 Subclause 10.1 . 93
C.7.1 Sweden . 93
C.7.2 UK .
...
IEC 60728-11 ®
Edition 5.0 2023-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 11: Sécurité
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
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CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
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containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
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(IEV) online.
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IEC 60728-11 ®
Edition 5.0 2023-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable networks for television signals, sound signals and interactive services –
Part 11: Safety
Réseaux de distribution par câbles pour signaux de télévision, signaux de
radiodiffusion sonore et services interactifs –
Partie 11: Sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.060.40 ISBN 978-2-8322-7441-5
– 2 – IEC 60728-11:2023 © IEC 2023
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, symbols and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Symbols . 18
3.3 Abbreviated terms . 18
4 Fundamental requirements . 19
4.1 General . 19
4.2 Mechanical requirements . 20
4.2.1 General . 20
4.2.2 Equipment design and construction . 20
4.2.3 Accessible parts . 20
4.3 Radiation . 20
4.4 Electromagnetic radiation. 20
4.5 Thermal protection . 20
4.6 Safety in case of fire and fire reaction . 20
5 Protection against environmental influences . 21
6 Equipotential bonding and earthing . 21
6.1 General requirements . 21
6.2 Equipotential bonding mechanisms . 21
6.3 Equipotential bonding in meshed systems . 32
6.3.1 References to other standards . 32
6.3.2 General on AC mains . 32
6.3.3 AC power distribution and connection of the protective conductor . 32
6.3.4 Dangers and malfunction . 32
6.3.5 Measures. 33
7 Mains-supplied equipment . 33
8 Remote power feeding in cable networks . 34
8.1 Remote power feeding . 34
8.1.1 Maximum allowed voltages . 34
8.1.2 General requirements for equipment . 34
8.1.3 Current-carrying capacity and dielectric strength of the components . 34
8.2 Remote powering from subscriber premises . 35
9 Segregation distances and protection against indirect contact to electric power
distribution systems . 35
9.1 General . 35
9.2 Overhead lines . 35
9.2.1 Overhead lines up to 1 000 V. 35
9.2.2 Overhead lines above 1 000 V . 35
9.3 House installations up to 1 000 V . 35
10 System outlets and transfer points . 36
10.1 General . 36
10.2 System outlet . 36
10.2.1 Types of system outlets . 36
10.2.2 Fully isolated system outlet . 37
10.2.3 Semi-isolated system outlet . 37
10.2.4 Non-isolated system outlet with protective element . 37
10.2.5 Non-isolated system outlet without protective element . 37
10.2.6 Fully-isolated system outlet provided by means of a FTTH system . 37
10.3 Transfer point . 39
11 Protection against atmospheric overvoltages and elimination of potential
differences . 40
11.1 General . 40
11.2 Protection of the antenna system . 41
11.2.1 Selection of appropriate methods for protection of antenna systems . 41
11.2.2 Building equipped with a lightning protection system (LPS). 42
11.2.3 Building not equipped with an LPS . 49
11.3 Earthing and bonding of the antenna system . 52
11.3.1 Internal protection system . 52
11.3.2 Earthing conductors . 53
11.3.3 Earth termination system . 55
11.4 Overvoltage protection . 59
12 Mechanical stability . 60
12.1 General requirements . 60
12.2 Bending moment . 60
12.3 Wind-pressure values . 62
12.4 Mast construction . 62
12.5 Data to be published . 63
Annex A (normative) Earth loop impedance . 64
A.1 General . 64
A.2 Earthing for fault conditions . 64
A.3 Earthing to protect against hazardous touch voltage .
...
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