EN IEC 60445:2021

Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors

IEC 60445:2021 is available as IEC 60445:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60445:2021 applies to the identification and marking of terminals of electrical equipment such as resistors, fuses, relays, contactors, transformers, rotating machines and, wherever applicable, to combinations of such equipment (e.g. assemblies), and also applies to the identification of terminations of certain designated conductors. It also provides general rules for the use of certain colours or alphanumeric notations to identify conductors with the aim of avoiding ambiguity and ensuring safe operation. These conductor colours or alphanumeric notations are intended to be applied in cables or cores, busbars, electrical equipment and installations. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It has the status of a basic safety publication in accordance with IEC Guide 104. IEC 60445:2021 cancels and replaces the sixth edition published in 2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the definitions have been aligned with IEC 60050-195:2021 and IEC 60050-826; b) the provisions for colour to be used for identification of certain designated conductors are made requirements and not only recommendations; c) introduction of a new subclause on marking of protective terminals for multiple power supply inputs on equipment.

Grund- und Sicherheitsregeln für die Mensch-Maschine-Schnittstelle - Kennzeichnung von Anschlüssen elektrischer Betriebsmittel, angeschlossenen Leiterenden und Leitern

Principes fondamentaux et de sécurité pour les interfaces hommes-machines, le marquage et l'’identification - Identification des bornes de matériels, des extrémités de conducteurs et des conducteurs

IEC 60445:2021 est disponible sous forme de IEC 60445:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60445:2021 s’applique à l’identification et au marquage des bornes de matériels électriques, tels que résistances, coupe-circuits à fusibles, relais, contacteurs, transformateurs, machines tournantes et, chaque fois que cela est possible, à des combinaisons de tels matériels (par exemple des ensembles). Il s’applique également à l’identification des extrémités de certains conducteurs désignés. Il prévoit également des règles générales concernant l’utilisation de certaines couleurs ou de certains caractères alphanumériques pour identifier les conducteurs dans le but d’éviter toute ambiguïté et d’assurer la sécurité de fonctionnement. Ces couleurs et caractères alphanumériques destinés aux conducteurs sont prévus pour être appliqués aux noyaux, aux barres omnibus et aux matériels électriques, ainsi qu’aux câbles ou installations. La présente publication fondamentale de sécurité axée sur les exigences de sécurité essentielles est principalement destinée à être utilisée par les comités d’études lors de l’élaboration des normes conformément aux principes énoncés dans le Guide 104 de l’IEC et le Guide ISO/IEC 51. L'IEC 60445:2021 annule et remplace la sixième édition parue en 2017. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) les définitions ont été harmonisées avec l’IEC 60050-195:2021 et l’IEC 60050-826; b) les dispositions relatives aux couleurs à utiliser pour l’identification de certains conducteurs désignés sont à présent des exigences et ne sont plus de simples recommandations; c) introduction d’un nouveau paragraphe sur le marquage des bornes de protection pour des entrées d’alimentation multiples sur un matériel.

Osnovna in varnostna načela za vmesnik človek-stroj, označevanje in razpoznavanje - Razpoznavanje terminalov opreme, končnikov vodnikov in vodnikov (IEC 60445:2021)

General Information

• Status: Published
• Publication Date: 02-Sep-2021
• ICS: 01.080.20 - Graphical symbols for use on specific equipment
• ICS: 13.110 - Safety of machinery
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: CLC/SR 3 - Information structures, documentation and graphical symbols
• Drafting Committee: IEC/TC 3 - IEC_TC_3
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 03-Sep-2021
• Completion Date: 03-Sep-2021
• Ref Project: SIST EN IEC 60445:2021 - Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors (IEC 60445:2021)

Relations

• Replaces: EN 60445:2017 - Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors
• Effective Date: 07-Sep-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2021
Nadomešča:
SIST EN 60445:2018
Osnovna in varnostna načela za vmesnik človek-stroj, označevanje in
razpoznavanje - Razpoznavanje terminalov opreme, končnikov vodnikov in
vodnikov (IEC 60445:2021)
Basic and safety principles for man-machine interface, marking and identification -
Identification of equipment terminals, conductor terminations and conductors (IEC
60445:2021)
Grund- und Sicherheitsregeln für die Mensch-Maschine- Schnittstelle - Kennzeichnung
von Anschlüssen elektrischer Betriebsmittel, angeschlossenen Leiterenden und Leitern
(IEC 60445:2021)
Principes fondamentaux et de sécurité pour les interfaces hommes-machines, le
marquage et lidentification - Identification des bornes de matériels, des extrémités de
conducteurs et des conducteurs (IEC 60445:2021)
Ta slovenski standard je istoveten z: EN IEC 60445:2021
ICS:
01.080.20 Grafični simboli za posebno Graphical symbols for use on
opremo specific equipment
13.110 Varnost strojev Safety of machinery
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60445

NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 01.080.20; 13.110; 29.020 Supersedes EN 60445:2017 and all of its amendments
and corrigenda (if any)
English Version
Basic and safety principles for man-machine interface, marking
and identification - Identification of equipment terminals,
conductor terminations and conductors
(IEC 60445:2021)
Principes fondamentaux et de sécurité pour les interfaces Grund- und Sicherheitsregeln für die Mensch-Maschine-
hommes-machines, le marquage et l¿identification - Schnittstelle - Kennzeichnung von Anschlüssen elektrischer
Identification des bornes de matériels, des extrémités de Betriebsmittel, angeschlossenen Leiterenden und Leitern
conducteurs et des conducteurs (IEC 60445:2021)
(IEC 60445:2021)
This European Standard was approved by CENELEC on 2021-08-20. 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, 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,
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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60445:2021 E
European foreword
The text of document 3/1491/FDIS, future edition 7 of IEC 60445, prepared by IEC/TC 3
“Documentation, graphical symbols and representations of technical information” was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60445:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–05–20
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–08–20
document have to be withdrawn
This document supersedes EN 60445:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60445:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60079-11 NOTE Harmonized as EN 60079-11
IEC 60757 NOTE Harmonized as HD 457 S1
IEC 61666:2010 NOTE Harmonized as EN 61666:2010 (not modified)
IEC 62491 NOTE Harmonized as EN 62491
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60417 - Graphical symbols for use on equipment - -
IEC 60617 - Graphical symbols for diagrams - -

IEC 60445 ®
Edition 7.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ

Basic and safety principles for man-machine interface, marking and

identification – Identification of equipment terminals, conductor terminations

and conductors
Principes fondamentaux et de sécurité pour les interfaces homme-machine,

le marquage et l’identification – Identification des bornes de matériels,

des extrémités de conducteurs et des conducteurs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 01.080.20; 13.110; 29.020 ISBN 978-2-8322-9921-0

– 2 – IEC 60445:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 Methods of identification . 10
5 Application of identification means . 10
6 Identification by colours . 11
6.1 General . 11
6.2 Use of single colours . 11
6.2.1 The use of the single colours GREEN and YELLOW . 11
6.2.2 Neutral or mid-point conductor . 12
6.2.3 Line conductor in AC system . 12
6.2.4 Line conductor in DC system . 12
6.2.5 Functional earthing conductor . 12
6.3 Use of bi-colour combinations . 12
6.3.1 Permitted colours . 12
6.3.2 Protective conductor . 12
6.3.3 PEN conductor . 13
6.3.4 PEL conductor . 13
6.3.5 PEM conductor . 14
6.3.6 Protective bonding conductor . 14
7 Identification by alphanumeric notation . 14
7.1 General . 14
7.2 Equipment terminal identification – Marking principles . 14
7.3 Identification of certain designated conductors . 17
7.3.1 General . 17
7.3.2 Neutral conductor . 17
7.3.3 Protective conductor . 17
7.3.4 PEN conductor . 17
7.3.5 PEL conductor . 17
7.3.6 PEM conductor . 17
7.3.7 Protective bonding conductor . 17
7.3.8 Functional earthing conductor . 18
7.3.9 Functional bonding conductor . 18
7.3.10 Mid-point conductor . 18
7.3.11 Line conductor . 18
7.3.12 System-referencing-conductor . 18
Annex A (informative) Colours, alphanumeric notations and graphical symbols used
for identification of conductors and terminals . 19
Annex B (informative) List of notes concerning particular conditions in certain
countries . 21
Bibliography . 26

Figure 1 – Single element with two terminals . 15

IEC 60445:2021 © IEC 2021 – 3 –
Figure 2 – Single element with four terminals: Two endpoints and two intermediate
points . 15
Figure 3 – Three-phase equipment with six terminals . 15
Figure 4 – Three-element equipment with twelve terminals: Six endpoints and six
intermediate points . 16
Figure 5 – Equipment with groups of elements . 16
Figure 6 – Interconnection of equipment terminals and certain designated conductors . 17

Table A.1 – Colours, alphanumeric notations and graphical symbols used for
identification of conductors and terminals . 19

– 4 – IEC 60445:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BASIC AND SAFETY PRINCIPLES FOR MAN-MACHINE
INTERFACE, MARKING AND IDENTIFICATION –
IDENTIFICATION OF EQUIPMENT TERMINALS,
CONDUCTOR TERMINATIONS AND CONDUCTORS

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, go
...