IEC 60034-5:2020
(Main)Rotating electrical machines - Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification
Rotating electrical machines - Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification
IEC 60034-5:2020 applies to the classification of degrees of protection provided by enclosures for rotating electrical machines. It defines the requirements for protective enclosures that are in all other respects suitable for their intended use and which, from the point of view of materials and workmanship, ensure that the properties dealt with in this document are maintained under normal conditions of use. This document does not specify degrees of protection against mechanical damage of the machine, or conditions such as moisture (produced for example by condensation), corrosive dust and vapour, fungus or vermin.
This document is also applicable to explosion proof machines, but it does not specify the types of protection for use in a potentially explosive (dust, gas) environment. Those are defined in the IEC 60079 series of standards. This document gives definitions for standard degrees of protection provided by enclosures applicable to rotating electrical machines as regards the:
a. protection of persons against contacts with or approach to live parts and against contact with moving parts (other than smooth rotating shafts and the like) inside the enclosure and protection of the machine against ingress of solid foreign objects
b. protection of machines against the harmful effects due to ingress of water;
c. protection of machines against the harmful effects due to ingress of dust.
This fifth edition cancels and replaces the fourth edition, published in 2000, and its Amendment 1:2006.The main technical changes with respect to the previous edition are:
- the inclusion of an additional second numeral 9 including its test method,
- an additional note for clarification in Table 3,
- a clarification on the term open drain hole,
- a clarification on the ingress of dust in Table 4,
- pressure values given now in Pa only,
- a clarification in the scope on the applicability of this standard for (Ex) motors,
- a new Clause 3 with definitions,
The contents of the corrigendum of January 2024 have been included in this copy.
Machines électriques tournantes - Partie 5: Degrés de protection procurés par la conception intégrale de machines électriques tournantes (code IP) - Classification
l'IEC 60034-5:2020 s'applique à la classification des degrés de protection procurés par les enveloppes des machines électriques tournantes. Elle définit les exigences des enveloppes de protection qui conviennent à tous les autres égards à l'utilisation prévue et qui, du point de vue des matériaux et de la construction, garantissent que les caractéristiques faisant l'objet du présent document demeurent inchangées dans les conditions normales d'utilisation.
Le présent document ne spécifie pas les degrés de protection contre les dommages mécaniques de la machine, ou les conditions telles que l'humidité (produite par exemple par la condensation), les poussières ou vapeurs corrosives, les champignons ou la faune nuisible.
Le présent document s’applique également aux machines antidéflagrantes, mais il ne spécifie pas les types de protection pour une utilisation en milieu potentiellement explosif (poussières, gaz). Ces derniers sont définis dans la série de normes IEC 60079.
Le présent document donne les définitions des degrés de protection normaux procurés par les enveloppes applicables aux machines électriques tournantes, en ce qui concerne:
a) la protection des personnes contre les contacts ou l'approche de parties sous tension et contre les contacts avec des pièces en mouvement (autres que les arbres lisses en rotation et pièces analogues) à l’intérieur de l'enveloppe et la protection de la machine contre la pénétration de corps solides étrangers;
b) la protection des machines contre les effets nuisibles dus à la pénétration de l'eau;
c) la protection des machines contre les effets nuisibles dus à la pénétration de poussières.
Cette cinquième édition annule et remplace la quatrième édition, parue en 2000, ainsi que son amendement 1:2006. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
• ajout d’un second chiffre 9 et de la méthode d’essai correspondante,
• ajout d’une note de clarification au Tableau 3,
• clarification du terme trou d’évacuation ouvert,
• clarification portant sur la pénétration des poussières au Tableau 4,
• valeurs de pression désormais exprimées uniquement en Pa,
• ajout d’une clarification dans le domaine d’application de la présente norme pour les moteurs (Ex),
• un nouvel article 3 avec définitions.
Le contenu du corrigendum de janvier 2024 a été pris en considération dans cet exemplaire.
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IEC 60034-5 ®
Edition 5.0 2020-04
INTERNATIONAL
STANDARD
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
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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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 60034-5 ®
Edition 5.0 2020-04
INTERNATIONAL
STANDARD
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-8025-6
– 2 – IEC 60034-5:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Designation . 7
4.1 General . 7
4.2 Single characteristic numeral . 7
4.3 Supplementary letters . 7
4.4 Example of designation . 7
5 Degrees of protection – First characteristic numeral . 7
5.1 Indication of degree of protection . 7
5.2 Compliance to indicated degree of protection . 8
5.3 External fans. 8
5.4 Drain holes . 8
6 Degrees of protection – Second characteristic numeral . 9
6.1 Indication of the degree of protection . 9
6.2 Compliance with lower degrees of protection . 10
7 Marking . 10
8 General requirements for tests . 11
8.1 General . 11
8.2 Adequate clearance . 11
8.2.1 General . 11
8.2.2 Low-voltage machines (rated voltages not exceeding 1 000 V a.c. and
1 500 V d.c.) . 11
8.2.3 High-voltage machines (rated voltages exceeding 1 000 V a.c. and
1 500 V d.c.) . 11
9 Tests for first characteristic numeral . 11
10 Tests for second characteristic numeral . 15
10.1 Test conditions . 15
10.2 Acceptance conditions . 23
10.2.1 General . 23
10.2.2 Ingress of water . 24
10.2.3 Withstand voltage test . 24
11 Requirements and tests for open weather-protected machines . 24
Figure 1 – Standard test finger . 14
Figure 2 – Equipment to prove protection against dust . 15
Figure 3 – Equipment to prove protection against dripping water . 18
Figure 4 – Equipment to prove protection against spraying and splashing water (shown
with spraying holes in the case of second characteristic numeral 3) . 19
Figure 5 – Hand-held equipment to prove protection against spraying and splashing
water . 20
Figure 6 – Standard nozzle for hose test . 20
Figure 7 – Geometry of fan jet nozzle . 21
Figure 8 – Measurement of the impact force . 22
Figure 9 – Test set-up for determining the protection against high-pressure/steam-jet
cleaning – degree of protection against ingress of water IP X9 for small enclosures . 23
Table 1 – Test requirements for guards . 8
Table 2 – Degrees of protection indicated by the first characteristic numeral . 9
Table 3 – Degrees of protection indicated by the second characteristic numeral . 10
Table 4 – Test and acceptance conditions for first characteristic numeral . 12
Table 5 – Test conditions for second characteristic numeral . 16
– 4 – IEC 60034-5:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) – Classification
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 60034-5 has been prepared by IEC technical committee 2: Rotating
machinery.
This fifth edition cancels and replaces the fourth edition, published in 2000, and its
Amendment 1:2006. This edition constitutes a technical revision.
The main technical changes with respect to the previous edition are:
• the inclusion of an additional second numeral 9 including its test method,
• an additional note for clarification in Table 3,
• a clarification on the term open drain hole,
• a clarification on the ingress of dust in Table 4,
• pressure values given now in Pa only,
• a clarification in the scope on the applicability of this standard for (Ex) motors,
• a new Clause 3 with definitions,
The text of this International Standard is based on the following documents:
CDV Report on voting
2/1960/CDV 2/1972A/RVC
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.
A list of all parts in the IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.
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.
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 doc
...
IEC 60034-5 ®
Edition 5.0 2020-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
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 Central Office 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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60034-5 ®
Edition 5.0 2020-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.160.01 ISBN 978-2-8322-8298-4
– 2 – IEC 60034-5:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope and object . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Designation . 7
4.1 General . 7
4.2 Single characteristic numeral . 7
4.3 Supplementary letters . 7
4.4 Example of designation . 8
5 Degrees of protection – First characteristic numeral . 8
5.1 Indication of degree of protection . 8
5.2 Compliance to indicated degree of protection . 8
5.3 External fans. 8
5.4 Drain holes . 9
6 Degrees of protection – Second characteristic numeral . 10
6.1 Indication of the degree of protection . 10
6.2 Compliance with lower degrees of protection . 10
7 Marking . 11
8 General requirements for tests . 12
8.1 General . 12
8.2 Adequate clearance . 12
8.2.1 General . 12
8.2.2 Low-voltage machines (rated voltages not exceeding 1 000 V a.c. and
1 500 V d.c.) . 12
8.2.3 High-voltage machines (rated voltages exceeding 1 000 V a.c. and
1 500 V d.c.) . 12
9 Tests for first characteristic numeral . 12
10 Tests for second characteristic numeral . 16
10.1 Test conditions . 16
10.2 Acceptance conditions . 26
10.2.1 General . 26
10.2.2 Ingress of water . 26
10.2.3 Withstand voltage test . 26
11 Requirements and tests for open weather-protected machines . 26
Figure 1 – Standard test finger . 15
Figure 2 – Equipment to prove protection against dust . 16
Figure 3 – Equipment to prove protection against dripping water . 20
Figure 4 – Equipment to prove protection against spraying and splashing water (shown
with spraying holes in the case of second characteristic numeral 3) . 21
Figure 5 – Hand-held equipment to prove protection against spraying and splashing
water . 22
Figure 6 – Standard nozzle for hose test . 22
Figure 7 – Geometry of fan jet nozzle . 23
Figure 8 – Measurement of the impact force . 24
Figure 9 – Test set-up for determining the protection against high-pressure/steam-jet
cleaning – degree of protection against ingress of water IP X9 for small enclosures . 25
Table 1 – Test requirements for guards . 8
Table 2 – Degrees of protection indicated by the first characteristic numeral . 9
Table 3 – Degrees of protection indicated by the second characteristic numeral . 11
Table 4 – Test and acceptance conditions for first characteristic numeral . 13
Table 5 – Test conditions for second characteristic numeral . 17
– 4 – IEC 60034-5:2020 RLV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) – Classification
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 redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change has
been made. Additions are in green text, deletions are in strikethrough red text.
International Standard IEC 60034-5 has been prepared by IEC technical committee 2: Rotating
machinery.
This fifth edition cancels and replaces the fourth edition, published in 2000, and its
Amendment 1:2006. This edition constitutes a technical revision.
The main technical changes with respect to the previous edition are:
• the inclusion of an additional second numeral 9 including its test method,
• an additional note for clarification in Table 3,
• a clarification on the term open drain hole,
• a clarification on the ingress of dust in Table 4,
• pressure values given now in Pa only,
• a clarification in the scope on the applicability of this standard for (Ex) motors,
• a new Clause 3 with definitions,
The text of this International Standard is based on the following documents:
CDV Report on voting
2/1960/CDV 2/1972A/RVC
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.
A list of all parts in the IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.
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
...
IEC 60034-5 ®
Edition 5.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
Machines électriques tournantes –
Partie 5: Degrés de protection procurés par la conception intégrale de machines
électriques tournantes (code IP) – Classification
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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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 Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
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IEC 60034-5 ®
Edition 5.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Rotating electrical machines –
Part 5: Degrees of protection provided by the integral design of rotating
electrical machines (IP code) – Classification
Machines électriques tournantes –
Partie 5: Degrés de protection procurés par la conception intégrale de machines
électriques tournantes (code IP) – Classification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-8644-9
– 2 – IEC 60034-5:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Designation . 7
4.1 General . 7
4.2 Single characteristic numeral . 7
4.3 Supplementary letters . 7
4.4 Example of designation . 7
5 Degrees of protection – First characteristic numeral . 7
5.1 Indication of degree of protection . 7
5.2 Compliance to indicated degree of protection . 8
5.3 External fans. 8
5.4 Drain holes . 8
6 Degrees of protection – Second characteristic numeral . 9
6.1 Indication of the degree of protection . 9
6.2 Compliance with lower degrees of protection . 10
7 Marking . 10
8 General requirements for tests . 11
8.1 General . 11
8.2 Adequate clearance . 11
8.2.1 General . 11
8.2.2 Low-voltage machines (rated voltages not exceeding 1 000 V a.c. and
1 500 V d.c.) . 11
8.2.3 High-voltage machines (rated voltages exceeding 1 000 V a.c. and
1 500 V d.c.) . 11
9 Tests for first characteristic numeral . 11
10 Tests for second characteristic numeral . 15
10.1 Test conditions . 15
10.2 Acceptance conditions . 23
10.2.1 General . 23
10.2.2 Ingress of water . 24
10.2.3 Withstand voltage test . 24
11 Requirements and tests for open weather-protected machines . 24
Figure 1 – Standard test finger . 14
Figure 2 – Equipment to prove protection against dust . 15
Figure 3 – Equipment to prove protection against dripping water . 18
Figure 4 – Equipment to prove protection against spraying and splashing water (shown
with spraying holes in the case of second characteristic numeral 3) . 19
Figure 5 – Hand-held equipment to prove protection against spraying and splashing
water . 20
Figure 6 – Standard nozzle for hose test . 20
Figure 7 – Geometry of fan jet nozzle . 21
Figure 8 – Measurement of the impact force . 22
Figure 9 – Test set-up for determining the protection against high-pressure/steam-jet
cleaning – degree of protection against ingress of water IP X9 for small enclosures . 23
Table 1 – Test requirements for guards . 8
Table 2 – Degrees of protection indicated by the first characteristic numeral . 9
Table 3 – Degrees of protection indicated by the second characteristic numeral . 10
Table 4 – Test and acceptance conditions for first characteristic numeral . 12
Table 5 – Test conditions for second characteristic numeral . 16
– 4 – IEC 60034-5:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) – Classification
FOREWORD
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assess
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