IEC 63044-3:2017
(Main)Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Part 3: Electrical safety requirements
Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Part 3: Electrical safety requirements
IEC 63044-3:2017 provides the electrical safety requirements related to the HBES/BACS network in addition to the product safety standards for HBES/BACS devices. It also applies to devices used within an HBES/BACS network for which no specific HBES/BACS product safety standard exists. In addition, it defines safety requirements for the interface of equipment intended to be connected to an HBES/BACS network. It does not apply to interfaces to other networks.
NOTE An example of other networks is a dedicated ICT network covered by IEC 62949. This document is applicable to
operator stations and other human–system interface devices,
devices for management functions,
control devices, automation stations and application-specific controllers,
field devices and their interfaces, and
cabling and interconnection of devices
used within a dedicated HBES/BACS network. This document covers the following requirements and compliance criteria:
protection from hazards in the device;
protection from overvoltages on the network;
protection from touch current;
protection from hazards caused by different types of circuit;
protection of the communication wiring from overheating caused by excessive current.
Systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) et systèmes de gestion technique du bâtiment (SGTB) - Partie 3: Exigences de sécurité électrique
L'IEC 63044-3:2017 fournit les exigences de sécurité électrique relatives au réseau HBES/SGTB outre les normes de sécurité de produits applicables aux dispositifs HBES/SGTB. Elle s'applique également aux dispositifs utilisés dans un réseau HBES/SGTB pour lequel il n'existe aucune norme de sécurité de produit HBES/SGTB spécifique. De plus, elle spécifie des exigences de sécurité relatives à l'interface des équipements destinés à être connectés à un réseau HBES/SGTB. Elle ne s'applique pas aux interfaces avec d'autres réseaux.
NOTE Un réseau TIC dédié traité par l'IEC 62949 constitue un exemple d'autres réseaux. Le présent document est applicable aux
postes d’opérateur et autres dispositifs d’interface homme-système,
dispositifs pour des fonctions de gestion,
dispositifs de commande, postes d’automatisation et contrôleurs spécifiques à une application,
dispositifs de terrain et leurs interfaces, et
câblage et interconnexion des dispositifs
utilisés dans un réseau HBES/SGTB dédié. Le présent document couvre les exigences et critères de conformité suivants:
protection contre les dangers dans le dispositif;
protection contre les surtensions sur le réseau;
protection contre le courant de contact;
protection contre les dangers provoqués par différents types de circuits;
protection du câblage de communication contre les températures excessives provoquées par un courant trop élevé.
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IEC 63044-3 ®
Edition 1.1 2021-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
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Home and building electronic systems (HBES) and building automation and
control systems (BACS) –
Part 3: Electrical safety requirements
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IEC 63044-3 ®
Edition 1.1 2021-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Home and building electronic systems (HBES) and building automation and
control systems (BACS) –
Part 3: Electrical safety requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.01; 29.120.99 ISBN 978-2-8322-9781-0
IEC 63044-3 ®
Edition 1.1 2021-05
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Home and building electronic systems (HBES) and building automation and
control systems (BACS) –
Part 3: Electrical safety requirements
– 2 – IEC 63044-3:2017+AMD1:2021 CSV
© IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 10
4 Classification of HBES/BACS network interfaces Void . 10
5 Safety requirements and compliance criteria. 10
6 Requirements . 11
6.1 General . 11
6.2 Classification requirements of installation areas . 11
6.2.1 Overvoltage category . 11
6.2.2 Pollution degree . 11
6.2.3 Material class . 11
6.3 Electrical safety requirements . 11
6.3.1 Protection from hazards in the device . 11
6.3.2 Protection from overvoltage on the network and from hazards caused by
different types of of circuit network . 12
6.3.3 Protection from touch current . 14
6.3.4 Protection of the communication wiring from overheating . 16
6.4 Installation . 16
Annex A (informative) List of product standards for electrical safety . 17
Bibliography . 19
Table 1 – Requirements for connection of devices to a dedicated HBES/BACS network. 12
© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) AND
BUILDING AUTOMATION AND CONTROL SYSTEMS (BACS) –
Part 3: Electrical safety requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 63044-3 edition 1.1 contains the first edition (2017-01) [documents 23/735/CDV and
23/747/RVC] and its amendment 1 (2021-05) [documents 23/912/CDV and 23/961A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
– 4 – IEC 63044-3:2017+AMD1:2021 CSV
© IEC 2021
International Standard IEC 63044-3 has been prepared by IEC technical committee 23:
Electrical accessories.
A list of all parts in the IEC 63044 series, published under the general title Home and Building
Electronic Systems (HBES) and Building Automation Control Systems (BACS), can be found
on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this publication, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
This document shall be used in conjunction with relevant product safety standards.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
© IEC 2021
INTRODUCTION
The IEC 63044 series deals with developing and testing Home and Building Electronic
Systems (HBES) and Building Automation and Control Systems (BACS).
This document deals with electrical safety requirements for HBES/BACS.
This document is based on the philosophy that a device considered electrically safe according
to an appropriate product safety standard should also remain safe when connected to a
network. This document specifies in addition to the specific product standard the electrical
safety requirements necessary in order for an HBES/BACS device connected to a network to
remain safe under normal and single-fault conditions of the HBES/BACS network and at the
same time under normal and single-fault conditions of one or more HBES/BACS devices
connected to the HBES/BACS network. This includes protection from overvoltages on the
network, protection from hazards caused by connection of different types of circuit network,
the limitation of the touch current to a network and protection of the communication wiring
from overheating.
The HBES/BACS network is any interconnection between HBES/BACS products devices. The
HBES/BACS networks can be either an ICT network with interfaces classified according to
IEC 62949 or a dedicated network classified as a mains, ELV, FELV, SELV or PELV circuit
network.
For HBES/BACS products devices connected to an ICT network, the requirements in
IEC 62949 apply.
For HBES/BACS products devices connected to a dedicated HBES/BACS network, the
requirements for the electrical separation between the device and the network circuit are
specified (see Table 1). These specifications of the electrical separations follow the principle
in the basic safety publications IEC 60664-1 and IEC 61140, together with the installation
requirements of IEC 60364. The following compromises are used.
– According to the principles of IEC 60664-1, the rated impulse voltage for the separation
shall be the higher of the impulse voltage on the network and the rated impulse voltage of
the device circuit to be connected to the network.
– The overvoltage categories considered by IEC 60664-1 refer to overvoltages derived
directly from the mains through the power supply.
– The overvoltages coming from other sources (e.g. capacitive couplings) are not specified
in IEC 60664-1. IEC 60664-1 recommends that technical committees specify overvoltage
categories or rated impulse voltages as appropriate.
For the purposes of this document, the following impulse voltages have been specified.
• For networks with galvanic electrical separation f
...
IEC 63044-3 ®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Home and Building Electronic Systems (HBES) and Building Automation and
Control Systems (BACS) –
Part 3: Electrical safety requirements
Systèmes Electroniques pour les Foyers Domestiques et les Bâtiments (HBES)
et Systèmes de Gestion Technique du Bâtiment (SGTB) –
Partie 3: Exigences de sécurité électrique
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International Standards for all electrical, electronic and related technologies.
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IEC 63044-3 ®
Edition 1.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Home and Building Electronic Systems (HBES) and Building Automation and
Control Systems (BACS) –
Part 3: Electrical safety requirements
Systèmes Electroniques pour les Foyers Domestiques et les Bâtiments (HBES)
et Systèmes de Gestion Technique du Bâtiment (SGTB) –
Partie 3: Exigences de sécurité électrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.01; 29.120.99 ISBN 978-2-8322-3875-2
– 2 – IEC 63044-3:2017 © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 10
4 Classification of HBES/BACS network interfaces . 10
4.1 General . 10
4.2 ICT network . 10
4.3 Dedicated network . 10
5 Safety requirements and compliance criteria. 10
6 Requirements . 10
6.1 General . 10
6.2 Classification requirements of installation areas . 11
6.2.1 Overvoltage category . 11
6.2.2 Pollution degree . 11
6.3 Electrical safety requirements . 11
6.3.1 Protection from hazards in the device . 11
6.3.2 Protection from overvoltage on the network and from hazards caused by
different types of circuit . 11
6.3.3 Protection from touch current . 13
6.3.4 Protection of the communication wiring from overheating . 15
6.4 Installation . 15
Annex A (informative) List of product standards for electrical safety . 16
Bibliography . 18
Table 1 – Requirements for connection of devices to a dedicated HBES/BACS network. 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) AND
BUILDING AUTOMATION AND CONTROL SYSTEMS (BACS) –
Part 3: Electrical safety requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 63044-3 has been prepared by IEC technical committee 23:
Electrical accessories.
A list of all parts in the IEC 63044 series, published under the general title Home and Building
Electronic Systems (HBES) and Building Automation Control Systems (BACS), can be found
on the IEC website.
The text of this standard is based on the following documents:
CDV Report on voting
23/735/CDV 23/747/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
– 4 – IEC 63044-3:2017 © IEC 2017
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this publication, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
This document shall be used in conjunction with relevant product safety standards.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will b
...
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