IEC 61293:2019

Marking of electrical equipment with ratings related to electrical supply - Safety requirements

IEC 61293:2019 establishes minimum requirements and general rules on marking electric equipment with ratings and other characteristics to enable the proper and safe selection and installation of electric equipment related to any supply of electricity.
The object of this document is to:
• provide general requirements for the marking of the characteristics related to any supply system, such as voltage, current, frequency and power, without any restrictions;
• provide technical committees with uniform methods for the marking of electrical ratings of products.
This document is primarily intended for application by technical committees when specifying minimum markings of ratings related to any electrical supply of equipment, sub-assemblies and components, but it is also for application by product manufacturers for marking their products.
This horizontal standard is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 108.
One of the responsibilities of a technical committee is, wherever applicable, to make use of horizontal standards in the preparation of its publications. The contents of this horizontal standard will not apply unless specifically referred to or included in the relevant publications.
IEC 61293:2019 cancels and replaces the first edition published in 1994. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) its status as a basic safety publication has been removed;
b) the scope is extended to include the applicability of this document to product manufacturers;
c) the addition of a provision that the visibility of the marking during normal operation should be considered;
d) more detailed requirements where equipment has a set or range of rated values for a given characteristic;
e) requirements regarding the provision of the markings also in the technical documentation have been added;
f) some notes have been converted to normative text;
g) normative references and references to other standards have been updated.
It has the status of a horizontal standard in accordance with IEC Guide 108.

Marquage des matériels électriques avec des caractéristiques assignées relatives à l'alimentation électrique - Exigences de sécurité

L'IEC 61293:2019 établit les exigences minimales et les règles générales pour le marquage des matériels électriques avec des caractéristiques assignées et autres caractéristiques, afin de pouvoir choisir et installer, de manière adéquate et sûre, les matériels électriques associés à toute source d'alimentation électrique.
L'objet de ce document est de:
• fournir les exigences générales concernant le marquage, sans aucune restriction, des caractéristiques relatives à toute alimentation, telle que la tension, le courant, la fréquence et la puissance;
• fournir aux comités d'études des méthodes uniformes concernant le marquage des caractéristiques assignées électriques des produits.
Ce document est destiné principalement à être appliqué par les comités d'études lors de la spécification des marquages minimaux des caractéristiques assignées relatives à toute alimentation électrique de matériels, sous-ensembles et composants. Il est également destiné à être appliqué par les fabricants de produits pour le marquage de leurs produits.
Cette norme horizontale est essentiellement destinée à l'usage des comités d'études dans la préparation des normes, conformément aux principes établis dans le Guide 108 de l'IEC.
Une des responsabilités d'un comité d'études est, partout où cela est possible, de se servir des normes horizontales lors de la préparation de ses publications. Le contenu de cette norme horizontale ne s'appliquera pas, à moins qu'il ne soit spécifiquement désigné ou inclus dans les publications concernées.
L'IEC 61293:2019 annule et remplace la première édition parue en 1994. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) son statut de publication fondamentale de sécurité a été supprimé;
b) le domaine d'application est étendu afin d'inclure également l'applicabilité du présent document aux fabricants de produits;
c) l'ajout d'une provision pour prendre en compte la visibilité du marquage en fonctionnement normal;
d) des exigences plus détaillées ont été ajoutées lorsqu'un matériel comporte un ensemble ou une plage de valeurs assignées pour une caractéristique donnée;
e) des exigences concernant l'intégration des marquages également dans la documentation technique ont été ajoutées;
f) certaines notes ont été transformées en texte normatif;
g) les références normatives et les références à d'autres normes ont été actualisées.
Elle a le statut de norme horizontale conformément au Guide IEC 108.

General Information

• Status: Published
• Publication Date: 15-Sep-2019
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 3 - Documentation, graphical symbols and representations of technical information
• Drafting Committee: MT 61293 - TC 3/MT 61293
• Current Stage: PPUB - Publication issued
• Start Date: 30-Aug-2019
• Completion Date: 16-Sep-2019

Standards Content (Sample)

IEC 61293 ®
Edition 2.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL STANDARD
NORME HORIZONTALE
Marking of electrical equipment with ratings related to electrical supply –
Safety requirements
Marquage des matériels électriques avec des caractéristiques assignées
relatives à l'alimentation électrique – Exigences de sécurité

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IEC 61293 ®
Edition 2.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL STANDARD
NORME HORIZONTALE
Marking of electrical equipment with ratings related to electrical supply –

Safety requirements
Marquage des matériels électriques avec des caractéristiques assignées

relatives à l'alimentation électrique – Exigences de sécurité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020 ISBN 978-2-8322-7252-7

– 2 – IEC 61293:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Marking requirements . 8
4.1 Basic requirements . 8
4.2 Marking of electric equipment with its characteristics . 8
4.2.1 General . 8
4.2.2 Characteristics of the supply system . 9
4.2.3 Rated values of equipment . 9
4.2.4 Other characteristics . 9
4.2.5 Sequence of rated values and other characteristics . 10
4.3 Representation of values . 10
4.3.1 General . 10
4.3.2 Single value . 10
4.3.3 Limit values . 10
4.3.4 Two and more values . 10
4.3.5 Range of values . 11
4.3.6 Tolerances . 11
5 Consistency of marking presentation . 11
6 Application . 12
Annex A (informative) Examples . 13
Annex B (informative) List of notes concerning certain countries . 15
Bibliography . 16

Table A.1 – Examples of markings for electric equipment with ratings related to supply
of electricity . 13
Table A.2 – Examples of letter notations and graphical symbols . 14
Table B.1 – Notes concerning certain countries . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARKING OF ELECTRICAL EQUIPMENT WITH RATINGS RELATED
TO ELECTRICAL SUPPLY – 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
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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
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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 61293 has been prepared by IEC technical committee 3:
Information structures and elements, identification and marking principles, documentation and
graphical symbols.
This second edition cancels and replaces the first edition published in 1994. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) its status as a basic safety publication has been removed, and it has become a horizontal
publication in accordance with IEC Guide 108;
b) the scope is extended to include the applicability of this document to product
manufacturers;
c) the addition of a provision that the visibility of the marking during normal operation should
be considered;
– 4 – IEC 61293:2019 © IEC 2019
d) more detailed requirements where equipment has a set or range of rated values for a
given characteristic;
e) requirements regarding the provision of the markings also in the technical documentation
have been added;
f) some notes have been converted to normative text;
g) normative references and references to other standards have been updated.
The text of this International Standard is based on the following documents:
FDIS Report on voting
3/1404/FDIS 3/1414/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
It has the status of a horizontal standard in accordance with IEC Guide 108.
The reader's attention is drawn to the fact that Table B.1 of Annex B lists all of the "in-some-
country" clauses on differing practices of a less permanent nature relating to the subject of
this standard.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
MARKING OF ELECTRICAL EQUIPMENT WITH RATINGS RELATED
TO ELECTRICAL SUPPLY – SAFETY REQUIREMENTS

1 Scope
This International Standard establishes minimum requirements and general rules on marking
electric equipment with ratings and other characteristics to enable the proper and safe
selection and installation of electric equipment related to any supply of electricity.
The object of this document is to:
• provide general requirements for the marking of the characteristics related to any supply
system, such as voltage, current, frequency and power, without any restrictions;
• provide technical committees with uniform methods for the marking of electrical ratings of
products.
This document is primarily intended for application by technical committees when specifying
minimum markings of ratings related to any electrical supply of equipment, sub-assemblies
and components, but it is also for application by product manufacturers for marking their
products.
NOTE For further markings see ISO/IEC Guide 51.
This horizontal standard is primarily intended for use by technical committees in the
preparation of standards in accordance with the principles laid down in IEC Guide 108.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
horizontal standards in the preparation of its publications. The contents of this horizontal
standard will not apply unless specifically referred to or included in the relevant publications.
2 Normative references
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.
IEC 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60445, Basic and safety principles for man-machine interface, marking and identification
– Identification of equipment terminals, conductor terminations and conductors
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)
IEC 61082-1:2014, Preparation of documents used in electrotechnology – Part 1: Rules
IEC 61140, Protection against electric shock – Common aspects for installation and
equipment
– 6 – IEC 61293:2019 © IEC 2019
IEC 80000 (all parts), Quantities and units
ISO 7000, Graphical symbols for use on equipment – Registered symbols
ISO 80000 (all parts), Quantities and units
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
electric equipment
item used for such purposes as generation, conversion, transmission, distribution or utilization
of electric energy, such as electric machines, transformers, switchgear and controlgear,
measuring instruments, protective devices, wiring systems, current-using equipment
[SOURCE: IEC 60050-826:2004, 826-16-01]
3.2
line conductor
phase conductor (in AC systems) (deprecated)
pole conductor (in DC systems) (deprecated)
conductor which is energized in normal operation and capable of contributing to the
transmission or distribution of electric energy but which is not a neutral or mid-point conductor
[SOURCE: IEC 60050-195:1998, 195-02-08]
3.3
mid-point conductor
conductor electrically connected to the mid-point and capable of contributing to the
distribution of electric energy
[SOURCE: IEC 60050-195:1998, 195-02-07]
3.4
neutral conductor
conductor electrically connected to the neutral point and capable of contributing to the
distribution of electric energy
[SOURCE: IEC 60050-195:1998, 195-02-06]
3.5
protective conductor
PE (identification)
conductor provided for purposes of safety, for example protection against electric shock
[SOURCE: IEC 60050-195:1998, 195-02-09]

3.6
rated value
value of a quantity used for specification purposes, established for a specified set of operating
conditions of a component, device, equipment, or system
Note 1 to entry: Rated values are normally assigned by the manufacturer.
Note 2 to entry: When specifying a rated value for a quantity, the quantity is often identified by replacing the word
"value" with the quantity name in the term.
[SOURCE: IEC 60050-151:2001, 151-16-08, modified – Notes to entry have been added.]
3.7
rated voltage range
voltage range as declared by the manufacturer expressed by its lower and upper rated
voltages
[SOURCE: IEC 60050-151:2014, 151-16-49]
3.8
International System of Units
SI
system of units, based on the International System of Quantities, their names and symbols,
including a series of prefixes and their names and symbols, together with rules for their use,
adopted by the General Conference on Weights and Measures (CGPM)
Note 1 to entry: The SI is founded on the seven base quantities of the ISQ and the names and symbols of the
corresponding base units that are contained in the following table.
Base quantity Base unit
Name Name Symbol
length metre m
mass kilogram kg
time second s
electric current ampere A
thermodynamic temperature kelvin K
amount of substance mole mol
luminous intensity candela cd
Note 2 to entry: The base units and the coherent derived units of the SI form a coherent set, designated the "set
of coherent SI units".
Note 3 to entry: For a full description and explanation of the International System of Units, see the current edition
of the SI brochure published by the Bureau International des Poids et Mesures (BIPM) and available on the BIPM
website.
Note 4 to entry: In quantity calculus, the quantity 'number of entities' is often considered to be a base quantity,
with the base unit one, symbol 1.
Note 5 to entry: The SI prefixes for multiples of units and submultiples of units are:
Prefix Prefix Prefix
Factor Factor Factor
Name Symbol Name Symbol Name Symbol
24 3 -9
10 yotta Y 10 kilo k 10 nano n
21 2 -12
10 zetta Z 10 hecto h 10 pico p
18 1 -15
10 exa E 10 deca da 10 femto f
15 -1 -18
10 peta P 10 deci d 10 atto a
12 -2 -21
10 tera T 10 centi c 10 zepto z
9 -3 -24
10 giga G 10 milli m 10 yocto y
6 -6
10 mega M 10 micro µ
– 8 – IEC 61293:2019 © IEC 2019
[SOURCE: ISO/IEC Guide 99:2007, 1.16]
4 Marking requirements
4.1 Basic requirements
Electric equipment shall be marked with electrical ratings on the equipment by a suitable
method, for example, by means of name-plates or labels. The markings shall be legible,
visible and durable throughout the anticipated life of the equipment, taking into account the
environmental conditions in operation. Consideration should also be given to the visibility of
the marking during normal operation of the equipment.
A marking shall not be placed on a part intended to be removed, except where the marking is
placed on an enclosure which is intended to be removed in order to install the equipment and
put back in place once the equipment is installed.
Requirements as to the material, method and location of the marking for the different product
types are the responsibility of the relevant technical committee.
Some equipment requires the marking of both input and output characteristics. In such cases,
consideration shall be given to provide markings for output as well as for input characteristics.
Some electric equipment may be designed for use on more than one supply voltage or
frequency. On some equipment, the user may be required to make adjustments for use on a
supply system with a given nominal voltage. Some equipment is designed to operate on
several nominal voltages or over a voltage range without any adjustment and is marked
accordingly. In such cases the equipment shall be properly marked so that the user can apply
the equipment in a safe way.
If special requirements as to the power quality of the power supply are necessary for the safe
operation of the equipment, such requirements shall be provided as markings.
Ratings shall be marked with standard abbreviations according to IEC 60445 or with standard
graphical symbols taken from IEC 60417, IEC 60617 or ISO 7000. Examples of such standard
abbreviations are shown in Table A.2.
Physical quantities shall be expressed using only the numerical value and their decimal
multiples and submultiples followed by the unit symbol as specified in IEC 60027, IEC 80000
(all parts), or ISO 80000 (all parts).
International Standards shall only use SI units, as given in the various parts of ISO 80000 and
IEC 80000.
Dimensions and tolerances shall be indicated in an unambiguous manner.
4.2 Marking of electric equipment with its characteristics
4.2.1 General
Equipment shall be marked as specified in 4.1 with rated values and other characteristics
related to any electricity supply.
Each technical committee shall select the characteristics listed in 4.2 necessary to enable the
proper and safe application of equipment. Ratings and other characteristics which are not
necessary may be omitted.
For products being too small to accommodate a rating plate, colour identification or other
means in accordance with an International Standard or a recognized code should be used.
4.2.2 Characteristics of the supply system
Equipment shall be marked with the relevant characteristics of the supply system to which it
has to be connected as follows:
• type of supply system (AC, DC);
• number of line conductors (e.g., 1, 2, 3);
• other designated conductors (e.g., neutral conductor, mid-point conductor, protective
conductor, see IEC 60445);
• voltage corresponding to the supply system;
• frequency corresponding to the supply system.
NOTE IEC 60038 defines standard voltages for the nominal voltage of electrical supply systems and as reference
values for equipment and system design.
Capital letters without full stops shall be used. Alphanumeric notations may be replaced by
graphical symbols according to IEC 60417. Examples for the recommended applications of
these rules, also for the sequence order and the separation of the characteristics by the
character SOLIDUS (/) are given in Table A.1.
4.2.3 Rated values of equipment
The equipment shall be marked with the following rated values of equipment, where
applicable:
• rated voltage in volts (V), and/or
• rated frequency in hertz (Hz), and/or
• rated current in amperes (A), and/or
• rated input and/or output power in watts (W), and/or
• rated input and/or output power in volt amperes (VA), and/or
• rated input and output power factor, cosϕ, and/or
• rated efficiency, ɳ, where necessary
SI prefixes based on ISO 80000-1 shall be applied, if applicable. Examples are shown in
Table A.1.
Equipment marked with a number of rated voltages should also be marked with the rated input
power corresponding to each rated voltage. Equipment marked with a rated voltage range
should also be marked with the rated input and output powers corresponding to the minimum
(lower) and maximum (upper) voltage levels of the range for which the object is designed and
can be operated (see also 4.3.5).
4.2.4 Other characteristics
The equipment shall be marked to indicate the following characteristics, where applicable:
• the IP code in accordance with IEC 60529,
• the class of equipment in accordance with IEC 61140,
• indoor/outdoor applicability of the equipment.

– 10 – IEC 61293:2019 © IEC 2019
4.2.5 Sequence of rated values and other characteristics
If a given sequential order is needed, or if the space available is restricted, for example, to
one line, the following sequence is recommended:
• characteristics of the supply system,
• rated values and unit symbols,
• other characteristics.
For rated values of voltages, the value for line-to-neutral voltage or line-to-midpoint voltage
shall be provided before the line-to-line voltage value.
EXAMPLE 3/N/PE 230/400 V 50 Hz
For ratings which are listed vertically, a horizontal separating line should be used to avoid
confusion (see example in Table A.1, row 14).
4.3 Representation of values
4.3.1 General
Each indication within the marking shall consist of the numerical value followed by the unit
symbol, separated by the character SPACE ( ).
4.3.2 Single value
Each rating indication shall consist of:
• a single numerical value;
• the character SPACE ( );
• a unit symbol.
EXAMPLE 60 kV
4.3.3 Limit values
Where the value to be presented represents a limit, the quantity value shall be presented as
specified in 4.3.2, followed by the character SPACE ( ) and:
• for an upper limit, the upper-case letters MAX, or
• for a lower limit, the upper-case letters MIN.
EXAMPLE 250 V MAX
4.3.4 Two and more values
Equipment suitable for use on any of several specified rated values of input characteristics
which requires manual adjustment for operation shall be marked as follows:
• numerical values, each separated by the character SOLIDUS (/) in a consistent
descending order, followed by the SPACE ( ), and
• unit symbol.
EXAMPLE 1 24/12/6 V
For equipment which may be used on any of various values of voltages or frequencies and
when the switching between the values is automatic, the quantity value shall be presented as
specified in 4.3.2 followed by the character SPACE and the upper-case letters AUTOMATIC.
The letters AUTOMATIC may be shortened to AUTO if no confusion is likely.

EXAMPLE 2 230/110 V AUTOMATIC or 230/110 V AUTO
Switches or other selecting devices on the equipment used for setting in operation different
value sets or single values shall be clearly marked so that it is unambiguous which single
values or value sets are set. A descending order of values is recommended.
4.3.5 Range of values
For equipment with a continuous value range for a quantity to be marked, the marking shall be
in accordance with IEC 61082-1:2014, 5.16, in the following sequence:
a) the presentation of the lower range value as specified in 4.3.2 followed by
b) the characters COMMA (,), SPACE ( ), HORIZONTAL ELLIPSIS (…), COMMA (,) and
SPACE ( ), followed by
c)
the presentation of the upper range value as specified in 4.3.2.
EXAMPLE 6 V, ., 12 V
NOTE See Clause 5 regarding the requirement for uniformity and consistency between the markings and the
documentation.
4.3.6 Tolerances
For equipment with a tolerance for the value of a quantity to be marked, the tolerance shall
either be given:
• as a percentage value, or
• as an absolute value with the same unit as for the quantity value.
The marking shall be provided as follows:
• for a symmetrical tolerance by a percentage value: the presentation of the numerical value
followed by the character SPACE ( ), LEFT PARENTHESIS ((), the DIGIT ONE (1),
SPACE ( ), PLUS MINUS (±), SPACE ( ), the percentage value, SPACE ( ), the
PERCENTAGE SIGN (%), RIGHT PARENTHESIS ()), SPACE ( ) and the unit symbol;
• for a symmetrical tolerance by an absolute value: the presentation of the value as
specified in 4.3.2, followed by the characters SPACE ( ), PLUS MINUS (±) and SPACE ( ),
followed by presentation of the tolerance value in accordance with 4.3.2, or
• for an asymmetrical tolerance: the presentation of the value as specified in 4.3.2, followed
the characters SPACE ( ) and PLUS (+), followed by presentation of the positive tolerance
value in accordance with 4.3.2, followed by the characters SPACE ( ), SOLIDUS (/),
SPACE ( ) and MINUS (−), followed by presentation of the negative tolerance value in
accordance with 4.3.2.
EXAMPLES 110 (1 ± 20 %) V or 110 V ± 22 V
230 V + 15 V / − 20 V
NOTE The requirements for marking are in line with the pattern used in the ISO 80000 and IEC 80000 series.
5 Consistency of marking presentation
Because of the limited space, the product instructions shall contain all necessary markings in
accordance with the requirements in Clause 4. The information for marking shall be written in
the official language of the consumer country following applicable regional and local law.
The marking shall be consistent with any information provided in the manufacturer's
instructions or in other documents associated with the product.

– 12 – IEC 61293:2019 © IEC 2019
6 Application
Examples of markings meeting the requirements given in Clause 4 are given in Table A.1 of
Annex A. Table A.2 of Annex A shows examples of letter notations and their corresponding
graphical symbols.
Further applications should be derived from these examples.

Annex A
(informative)
Examples
Table A.1 – Examples of markings for electric equipment
with ratings related to supply of electricity
Row Complete words Graphical symbol Abbreviation
no.
1 Direct current 10 A 10 A DC 10 A
2 Alternating current 1 kA  1 kA  AC 1 kA
3 Direct voltage 230 V 230 V DC 230 V
4 Alternating voltage 400 V 400 V AC 400 V
5 Direct or alternating voltage 250 V 250 V AC/DC 250 V
6 Range of direct voltage 0 V to 440 V 0 V, …, 400 V DC 0 V, ., 400 V
7 Single-phase system with two line conductors
2 230 V 2 AC 230 V
230 V
8 Single-phase system with one line conductor, a
a a
neutral conductor and a protective conductor 1/N/PE 230 V 50 Hz 1/N/PE AC 230 V 50 Hz
230 V, 50 Hz
9 Single-phase system with two line conductors
2/N 110/220 V 60 Hz 2/N AC 110/220 V 60 Hz
and a neutral conductor 110/2200 V, 60 Hz
10 Direct current system with two line conductors
2/M 220 V 2/M DC 220 V
and a mid-point conductor 220 V
11 Three-phase system with three line conductors
3 400 V 3 AC 400 V
400 V
12 Three-phase system with three line conductors
3/N 277/480 V 3/N AC 277/480 V
and a neutral conductor 277/480 V
13 Three-phase system with three line conductors,
a a
a neutral conductor and a protective conductor 3/N/PE 230/400 V 3/N/PE AC 230/400 V
230/400 V
b b
16 A 16 A
or AC  or
Small accessories used for alternating voltage
250 V 250 V
250 V, 16 A
250 V 16 A AC 250 V 16 A
a
USA and Canada do not use the symbol PE.
b
Unit symbols may be omitted as long as this does not give rise to any confusion.

– 14 – IEC 61293:2019 © IEC 2019
Table A.2 – Examples of letter notations and graphical symbols
Graphical symbol
Item Letter
Graphic Symbol No.
Type of current
– Alternating AC IEC 60417-5032:2002-10

– Direct DC IEC 60417-5031:2002-10

– Direct or alternating AC/DC IEC 60417-5033:2002-10

Terminal
a
– neutral conductor N
a
– mid-point conductor M
a
– protective conductor PE IEC 60417-5019:2006-08

Class of equipment
– class II – IEC 60417-5172:2003-02

– class III – IEC 60417-5180:2003-02

a
Alphanumeric notations in IEC 60445.

Annex B
(informative)
List of notes concerning certain countries
Table B.1 – Notes concerning certain countries
Country Clause No. Rationale (detailed justification for the Wording
requested country note)
RU 3.1 In the Russian Federation, the term electric equipment
"electric equipment" is defined item intended for generation,
differently: transmission and variation of
characteristics of an electric energy,
and also for conversion of electric
energy into another form of energy
RU 3.2 In the Russian Federation, the term "line line conductor
conductor" is defined differently: conductor which is energized under
normal conditions and used for the
transmission of electric energy but
which is not a neutral conductor or a
mid-point conductor
RU 3.3 In the Russian Federation, the term mid-point conductor
"mid-point conductor" is defined conductor electrically connected to the
differently: mid-point of the DC electrical system
and used for the transmission of electric
energy
RU 3.4 In the Russian Federation, the term neutral conductor
"neutral conductor" is defined differently: conductor electrically connected to the
neutral point or the mid-point of the AC
electrical system and used for the
transmission of electric energy
RU 3.5 In the Russian Federation, the term protective conductor
"protective conductor" is defined conductor provided for the purposes of
differently: electrical safety, for example protection
against electric shock
– 16 – IEC 61293:2019 © IEC 2019
Bibliography
IEC 60038, IEC standard voltages
IEC 60068-2-70, Environmental testing – Part 2-70: Tests – Test Xb: Abrasion of markings
and letterings caused by rubbing of fingers and hands
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
ISO/IEC Guide 99:2007, International vocabulary of metrology – Basic and general concepts
and associated terms (VIM)
IEC Guide 108, Guidelines for ensuring the coherency of IEC publications – Application of
horizontal standards
____________
– 18 – IEC 61293:2019 © IEC 2019
SOMMAIRE
AVANT-PROPOS . 19
1 Domaine d'application . 21
2 Références normatives . 21
3 Termes et définitions . 22
4 Exigences pour le marquage . 24
4.1 Exigences de base . 24
4.2 Marquage des matériels électriques avec leurs caractéristiques . 25
4.2.1 Généralités . 25
4.2.2 Caractéristiques du réseau d'alimentation. 25
4.2.3 Valeurs assignées pour les matériels . 25
4.2.4 Autres caractéristiques . 26
4.2.5 Séquence des valeurs assignées et des autres caractéristiques . 26
4.3 Représentation des valeurs . 26
4.3.1 Généralités . 26
4.3.2 Valeur unique . 26
4.3.3 Valeurs limites . 27
4.3.4 Deux valeurs et plus . 27
4.3.5 Plage de valeurs . 27
4.3.6 Tolérances . 27
5 Cohérence de présentation des marquages . 28
6 Application . 28
Annexe A (informative) Exemples . 29
Annexe B (informative) Liste des notes pour certains pays . 31
Bibliographie . 32

Tableau A.1 – Exemples de marquages des matériels électriques avec des
caractéristiques assignées relatives à l'alimentation électrique . 29
Tableau A.2 – Exemples de notations alphabétiques et de symboles graphiques . 30
Tableau B.1 – Notes pour certains pays . 31

COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
MARQUAGE DES MATÉRIELS ÉLECTRIQUES AVEC
DES CARACTÉRISTIQUES ASSIGNÉES RELATIVES À
L'ALIMENTATION ÉLECTRIQUE – EXIGENCES DE SÉCURITÉ

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (IEC) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour
objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines
de l'électricité et de l'électronique. À cet effet, l'IEC – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de l'IEC"). Leur élaboration est confiée à des comités d'études, aux
travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les organisations
internationales, gouvernementales et non gouvernementales, en liaison avec l'IEC, participent également aux
travaux. L'IEC collabore étroitement avec l'Organisation Internationale de Normalisation (ISO), selon des
conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de l'IEC concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de l'IEC
intéressés sont représentés dans chaque comité d'études.
3) Les Publications de l'IEC se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de l'IEC. Tous les efforts raisonnables sont entrepris afin que l'IEC
s'assure de l'exactitude du contenu technique de ses publications; l'IEC ne peut pas être tenue responsable de
l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de l'IEC s'engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de l'IEC dans leurs publications nationales
et régionales. Toutes divergences entre toutes Publications de l'IEC et toutes publications nationales ou
régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) L'IEC elle-même ne fournit aucune attestation de conformité. L'IEC n'est responsable d'aucun des services
effectués par les organismes de certification indépendants. L'IEC n'est responsable d'aucun des services
effectués par les organismes de certification indépendants.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à l'IEC, à ses administrateurs, employés, auxiliaires ou mandataires,
y compris ses experts particuliers et les membres de ses comités d'études et des Comités nationaux de l'IEC,
pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre dommage de quelque
nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais de justice) et les
dépenses découlant de la publication ou de l'utilisation de cette Publication de l'IEC ou de toute autre
Publication de l'IEC, ou au crédit qui lui est accordé.
8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L'attention est attirée sur le fait que certains des éléments de la présente Publication de l'IEC peuvent faire
l'objet de droits de brevet. L'IEC ne saurait être tenue pour responsable de ne pas avoir identifié de tels droits
de brevets et de ne pas avoir signalé leur existence.
La Norme internationale IEC 61293 a été établie par le comité d'études 3 de l'IEC: Structures
d'informations, documentation et symboles graphiqu
...