Rotating electrical machines - Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) - Classification

IEC 60034-5:2020 is available as IEC 60034-5:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
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,

Machines électriques tournantes - Partie 5: Degrés de protection procurés par la conception intégrale de machines électriques tournantes (code IP) - Classification

IEC 60034-5:2020 est disponible sous forme de IEC 60034-5:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
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.

General Information

Status
Published
Publication Date
28-Apr-2020
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
29-Apr-2020
Ref Project

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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
IEC 60034-5:2020-04(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60034-5:2020 © IEC 2020 – 3 –

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

---------------------- Page: 5 ----------------------
– 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

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

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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,
---------------------- Page: 6 ----------------------
IEC 60034-5:2020 © IEC 2020 – 5 –
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 document using a colour printer.

---------------------- Page: 7 ----------------------
– 6 – IEC 60034-5:2020 © IEC 2020
ROTATING ELECTRICAL MACHINES –
Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) – Classification
1 Scope

This part of IEC 60034 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 specifiy the types

of protection for use in a potentially explosive (dust, gas) environment. Those are defined in the

IEC 60079 series of standards.

In certain applications (such as agricultural or domestic appliances), more extensive

precautions against accidental or deliberate contact may be specified.

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.

It gives designations for these protective degrees and tests to be performed to check that the

machines meet the requirements of this document.
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 60034-6, Rotating electrical machines – Part 6: Methods of cooling (IC code)
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
---------------------- Page: 8 ----------------------
IEC 60034-5:2020 © IEC 2020 – 7 –
3.1
closed machine

machine where no medium from the surrounding medium, for the purpose of cooling, passes

through the machine
[SOURCE: IEC 60050-411:1996, 411-44-17]
3.2
open machine

machine with an open cooling circuit in which the coolant is drawn directly from the surrounding

medium passing through the machine and then returning directly to the surrounding medium

[SOURCE: IEC 60050-411:1996, 411-44-16]
4 Designation
4.1 General

The designation used for the degree of protection consists of the letters IP followed by two

characteristic numerals signifying conformity with the conditions indicated in the tables of

Clauses 5 and 6 respectively.
4.2 Single characteristic numeral

When it is required to indicate a degree of protection by only one characteristic numeral, the

omitted numeral shall be replaced by the letter X, for example IPX5 or IP2X.
4.3 Supplementary letters

4.3.1 Additional information may be indicated by a supplementary letter following the second

characteristic numeral. If more than one letter is used, the alphabetic sequence shall apply.

4.3.2 In special applications (such as machines with open circuit cooling for ship deck

installation with air inlet and outlet openings closed during standstill), numerals may be followed

by a letter indicating whether the protection against harmful effects due to ingress of water was

verified or tested for the machine not running (letter S) or the machine running (letter M). In this

case, the degree of protection in either state of the machine shall be indicated, for example

IP55S/IP20M.

The absence of the letters S and M shall imply that the intended degree of protection will be

provided under all normal conditions of use.

4.3.3 For air-cooled open machines suitable for specific weather conditions and provided

with additional protective features or processes (as specified in Clause 11), the letter W may

be used.
4.4 Example of designation
IP 4 4
Characteristic letters
First characteristic numeral (see Table 2)
Second characteristic numeral (see Table 3)
5 Degrees of protection – First characteristic numeral
5.1 Indication of degree of protection

The first characteristic numeral indicates the degree of protection provided by the enclosure to

persons and to the parts of the machine inside the enclosure.

Table 2 gives, in the third column, brief details of objects which will be ‘excluded’ from the

enclosure for each of the degrees of protection represented by the first characteristic numeral.

The term ‘excluded’ implies that a part of the body, a tool or a wire held by a person, either will

not enter the machine or, if it enters, that adequate clearance will be maintained between it and

---------------------- Page: 9 ----------------------
– 8 – IEC 60034-5:2020 © IEC 2020

the live parts or dangerous moving parts (smooth rotating shafts and the like are not considered

dangerous).

The third column of Table 2 also indicates the minimum size of solid foreign objects which will

be excluded.
5.2 Compliance to indicated degree of protection

Compliance of an enclosure with an indicated degree of protection implies that the enclosure

will also comply with all lower degrees of protection in Table 2. In consequence, the tests

establishing these lower degrees of protection are not required, except in case of doubt.

5.3 External fans

The blades and spokes of fans external to the enclosure shall be protected against contact by

means of guards complying with Table 1.
Table 1 – Test requirements for guards
Protection of machine Test
IP1X 50 mm sphere test
IP2X to IP6X Finger test

For the test, the rotor shall be slowly rotated, for example by hand when possible.

Smooth rotating shafts and similar parts are not considered dangerous.
5.4 Drain holes
If the machine is provided with drain holes, the following shall apply:

• drain holes intended normally to be open on site shall be kept open during testing;

• drain holes are considered as open as long as no breather(s) or plug(s), etc., are mounted

in a drain;

• if machines with protection IP3X or IP4X are intended to be run with open drain holes, the

drain holes may comply with protection IP2X;

• if machines with protection IP5X are intended to be run with open drain holes, the drain

holes shall comply with protection IP4X.
---------------------- Page: 10 ----------------------
IEC 60034-5:2020 © IEC 2020 – 9 –
Table 2 – Degrees of protection indicated by the first characteristic numeral
Degree of protection
First
Test
characteristic
Brief description
conditions
Definition
numeral
(NOTE 1)
0 Non-protected machine No special protection No test

1 Machine protected against solid Accidental or inadvertent contact with or Table 4

(NOTE 2) objects greater than 50 mm approach to live and moving parts inside the
enclosure by a large surface of the human body,
such as a hand (but no protection against
deliberate access)
Ingress of solid objects exceeding 50 mm in
diameter

2 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 12 mm inside the enclosure by fingers or similar objects

not exceeding 80 mm in length
Ingress of solid objects exceeding 12 mm in
diameter

3 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 2,5 mm inside the enclosure by tools or wires exceeding

2,5 mm in diameter
Ingress of solid objects exceeding 2,5 mm in
diameter

4 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 1 mm inside the enclosure by wires or strips of
thickness greater than 1 mm
Ingress of solid objects exceeding 1 mm in
diameter
5 Dust-protected machine Contact with or approach to live or moving parts
(NOTE 3) inside the enclosure
Ingress of dust is not totally prevented but dust
does not enter in sufficient quantity to interfere
with satisfactory operation of the machine
6 Dust-tight machines Ingress of dust totally prevented

NOTE 1 The brief description given in the second column of this table cannot be used to specify the type of

protection.

NOTE 2 Machines assigned a first characteristic numeral 1, 2, 3 or 4 will exclude both regularly or irregularly

shaped solid objects, provided that three normally perpendicular dimensions of the object exceed the appropriate

figure in the ‘Definition’ column.

NOTE 3 The degree of protection against dust defined by this document is a general one. When the nature of the

dust (dimensions of particles, their nature, for instance fibrous particles) is specified, test conditions can be

determined by agreement between manufacturer and user.
6 Degrees of protection – Second characteristic numeral
6.1 Indication of the degree of protection

The second characteristic numeral indicates the degree of protection provided by the enclosure

with respect to harmful effects due to ingress of water.

Table 3 gives, in the third column, details of the type of protection provided by the enclosure

for each of the degrees of protection represented by the second characteristic numeral.

An air-cooled open machine is weather-protected when its design reduces the ingress of rain,

snow and airborne particles, under specified conditions, to an amount consistent with correct

operation.

This degree of protection is designated by the letter W placed after the second characteristic

numeral.
---------------------- Page: 11 ----------------------
– 10 – IEC 60034-5:2020 © IEC 2020
6.2 Compliance with lower degrees of protection

For second characteristic numerals up to and including 6, compliance of an enclosure with an

indicated degree of protection implies that the enclosure will also comply with all lower degrees

of protection in Table 3.

In consequence, the tests establishing these lower degrees of protection are not required,

except in case of doubt.

For IPX7, IPX8 and IPX9, it shall not be assumed that compliance of the enclosure implies that

the enclosure will also comply with all lower degrees of protection in Table 3.
Table 3 – Degrees of protection indicated by the second characteristic numeral
Degree of protection
Second
Test
characteristic
Brief description
conditions
Definition
numeral
(NOTE 1)
0 Non-protected machine No special protection No test

1 Machine protected against Dripping water (vertically falling drops) shall have no Table 5

dripping water harmful effect

2 Machine protected against Vertically dripping water shall have no harmful effect

dripping water when tilted when the machine is tilted at any angle up to 15°
up to 15° from its normal position
3 Machine protected against Water falling as a spray at an angle up to 60° from
spraying water the vertical shall have no harmful effect
4 Machine protected against Water splashing against the machine from any
splashing water direction shall have no harmful effect
5 Machine protected against Water projected by a nozzle against the machine
water jets from any direction shall have no harmful effect
(NOTE 3)
6 Machine protected against Water from heavy seas or water projected in powerful
heavy seas jets shall not enter the machine in harmful quantities

7 Machine protected against Ingress of water in the machine in a harmful quantity

the effects of immersion shall not be possible when the machine is immersed
in water under stated conditions of pressure and time
8 Machine protected against The machine is suitable for continuous submersion in
the effects of continuous water under conditions which shall be specified by
submersion the manufacturer (NOTE 2)
9 Machine protected against Water projected at high pressure and high
high pressure and high temperature against the enclosure from any direction
temperature water jets shall have no harmful effects (NOTE 3)

NOTE 1 The brief description given in the second column of this table cannot be used to specify the type of

protection.

NOTE 2 Normally, this means that the machine is hermetically sealed. However, with certain types of machines it

can mean that water can enter but only in such a manner that it produces no harmful effect.

NOTE 3 It is understood that protections as IPx5 or IPx9 are not equivalent to a total endurance to all weather

conditions that can be present for a long period of time. Weather-proof could be achieved by providing additional

protection.
7 Marking

It is recommended that the characteristic letters and numerals be marked on the machine

preferably on the rating plate or, if this is not practicable, on the enclosure.

When all parts of a machine do not have the same degree of protection, at least the designation

of the lowest degree shall be shown, followed, if necessary, by the higher designation with clear

reference to the part to which it applies.
---------------------- Page: 12 ----------------------
IEC 60034-5:2020 © IEC 2020 – 11 –

Space limitations on the rating plate usually only allow the lowest IP code to be marked. Parts

or components having a higher degree of protection should then be specified in the

documentation and/or in the operating instructions.
The lower degree of protection of:
– guards for external fans (as allowed in 5.3);
– drain holes (as allowed in 5.4);
need not be specified on the rating plate or in the documentation.

Where the mounting of the machine has an influence on the degree of protection, the intended

mounting arrangements shall be indicated by the manufacturer on the rating plate or in the

instructions for mounting.
8 General requirements for tests
8.1 General

The tests specified in this document are type tests. They shall be carried out on standard

products or models of them. Where this is not feasible, verification either by an alternative test

or by examination of drawings shall be the subject of an agreement between manufacturer

and user.

Unless otherwise specified, the machine for each test shall be clean with all the parts in place

and mou
...

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
IEC 60034-5:2020-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
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

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 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

---------------------- Page: 4 ----------------------
IEC 60034-5:2020 © IEC 2020 – 3 –

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

---------------------- Page: 5 ----------------------
– 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 bilingual version (2020-07) corresponds to the monolingual English version, published in

2020-04.

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,

---------------------- Page: 6 ----------------------
IEC 60034-5:2020 © IEC 2020 – 5 –
• 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.
The French version of this standard has not been voted upon.

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 document using a colour printer.

---------------------- Page: 7 ----------------------
– 6 – IEC 60034-5:2020 © IEC 2020
ROTATING ELECTRICAL MACHINES –
Part 5: Degrees of protection provided by the integral design
of rotating electrical machines (IP code) – Classification
1 Scope

This part of IEC 60034 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 specifiy the types

of protection for use in a potentially explosive (dust, gas) environment. Those are defined in the

IEC 60079 series of standards.

In certain applications (such as agricultural or domestic appliances), more extensive

precautions against accidental or deliberate contact may be specified.

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.

It gives designations for these protective degrees and tests to be performed to check that the

machines meet the requirements of this document.
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 60034-6, Rotating electrical machines – Part 6: Methods of cooling (IC code)
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
---------------------- Page: 8 ----------------------
IEC 60034-5:2020 © IEC 2020 – 7 –
3.1
closed machine

machine where no medium from the surrounding medium, for the purpose of cooling, passes

through the machine
[SOURCE: IEC 60050-411:1996, 411-44-17]
3.2
open machine

machine with an open cooling circuit in which the coolant is drawn directly from the surrounding

medium passing through the machine and then returning directly to the surrounding medium

[SOURCE: IEC 60050-411:1996, 411-44-16]
4 Designation
4.1 General

The designation used for the degree of protection consists of the letters IP followed by two

characteristic numerals signifying conformity with the conditions indicated in the tables of

Clauses 5 and 6 respectively.
4.2 Single characteristic numeral

When it is required to indicate a degree of protection by only one characteristic numeral, the

omitted numeral shall be replaced by the letter X, for example IPX5 or IP2X.
4.3 Supplementary letters

4.3.1 Additional information may be indicated by a supplementary letter following the second

characteristic numeral. If more than one letter is used, the alphabetic sequence shall apply.

4.3.2 In special applications (such as machines with open circuit cooling for ship deck

installation with air inlet and outlet openings closed during standstill), numerals may be followed

by a letter indicating whether the protection against harmful effects due to ingress of water was

verified or tested for the machine not running (letter S) or the machine running (letter M). In this

case, the degree of protection in either state of the machine shall be indicated, for example

IP55S/IP20M.

The absence of the letters S and M shall imply that the intended degree of protection will be

provided under all normal conditions of use.

4.3.3 For air-cooled open machines suitable for specific weather conditions and provided

with additional protective features or processes (as specified in Clause 11), the letter W may

be used.
4.4 Example of designation
IP 4 4
Characteristic letters
First characteristic numeral (see Table 2)
Second characteristic numeral (see Table 3)
5 Degrees of protection – First characteristic numeral
5.1 Indication of degree of protection

The first characteristic numeral indicates the degree of protection provided by the enclosure to

persons and to the parts of the machine inside the enclosure.

Table 2 gives, in the third column, brief details of objects which will be ‘excluded’ from the

enclosure for each of the degrees of protection represented by the first characteristic numeral.

The term ‘excluded’ implies that a part of the body, a tool or a wire held by a person, either will

not enter the machine or, if it enters, that adequate clearance will be maintained between it and

---------------------- Page: 9 ----------------------
– 8 – IEC 60034-5:2020 © IEC 2020

the live parts or dangerous moving parts (smooth rotating shafts and the like are not considered

dangerous).

The third column of Table 2 also indicates the minimum size of solid foreign objects which will

be excluded.
5.2 Compliance to indicated degree of protection

Compliance of an enclosure with an indicated degree of protection implies that the enclosure

will also comply with all lower degrees of protection in Table 2. In consequence, the tests

establishing these lower degrees of protection are not required, except in case of doubt.

5.3 External fans

The blades and spokes of fans external to the enclosure shall be protected against contact by

means of guards complying with Table 1.
Table 1 – Test requirements for guards
Protection of machine Test
IP1X 50 mm sphere test
IP2X to IP6X Finger test

For the test, the rotor shall be slowly rotated, for example by hand when possible.

Smooth rotating shafts and similar parts are not considered dangerous.
5.4 Drain holes
If the machine is provided with drain holes, the following shall apply:

• drain holes intended normally to be open on site shall be kept open during testing;

• drain holes are considered as open as long as no breather(s) or plug(s), etc., are mounted

in a drain;

• if machines with protection IP3X or IP4X are intended to be run with open drain holes, the

drain holes may comply with protection IP2X;

• if machines with protection IP5X are intended to be run with open drain holes, the drain

holes shall comply with protection IP4X.
---------------------- Page: 10 ----------------------
IEC 60034-5:2020 © IEC 2020 – 9 –
Table 2 – Degrees of protection indicated by the first characteristic numeral
Degree of protection
First
Test
characteristic
Brief description
conditions
Definition
numeral
(NOTE 1)
0 Non-protected machine No special protection No test

1 Machine protected against solid Accidental or inadvertent contact with or Table 4

(NOTE 2) objects greater than 50 mm approach to live and moving parts inside the
enclosure by a large surface of the human body,
such as a hand (but no protection against
deliberate access)
Ingress of solid objects exceeding 50 mm in
diameter

2 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 12 mm inside the enclosure by fingers or similar objects

not exceeding 80 mm in length
Ingress of solid objects exceeding 12 mm in
diameter

3 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 2,5 mm inside the enclosure by tools or wires exceeding

2,5 mm in diameter
Ingress of solid objects exceeding 2,5 mm in
diameter

4 Machine protected against solid Contact with or approach to live or moving parts

(NOTE 2) objects greater than 1 mm inside the enclosure by wires or strips of
thickness greater than 1 mm
Ingress of solid objects exceeding 1 mm in
diameter
5 Dust-protected machine Contact with or approach to live or moving parts
(NOTE 3) inside the enclosure
Ingress of dust is not totally prevented but dust
does not enter in sufficient quantity to interfere
with satisfactory operation of the machine
6 Dust-tight machines Ingress of dust totally prevented

NOTE 1 The brief description given in the second column of this table cannot be used to specify the type of

protection.

NOTE 2 Machines assigned a first characteristic numeral 1, 2, 3 or 4 will exclude both regularly or irregularly

shaped solid objects, provided that three normally perpendicular dimensions of the object exceed the appropriate

figure in the ‘Definition’ column.

NOTE 3 The degree of protection against dust defined by this document is a general one. When the nature of the

dust (dimensions of particles, their nature, for instance fibrous particles) is specified, test conditions can be

determined by agreement between manufacturer and user.
6 Degrees of protection – Second characteristic numeral
6.1 Indication of the degree of protection

The second characteristic numeral indicates the degree of protection provided by the enclosure

with respect to harmful effects due to ingress of water.

Table 3 gives, in the third column, details of the type of protection provided by the enclosure

for each of the degrees of protection represented by the second characteristic numeral.

An air-cooled open machine is weather-protected when its design reduces the ingress of rain,

snow and airborne particles, under specified conditions, to an amount consistent with correct

operation.

This degree of protection is designated by the letter W placed after the second characteristic

numeral.
---------------------- Page: 11 ----------------------
– 10 – IEC 60034-5:2020 © IEC 2020
6.2 Compliance with lower degrees of protection

For second characteristic numerals up to and including 6, compliance of an enclosure with an

indicated degree of protection implies that the enclosure will also comply with all lower degrees

of protection in Table 3.

In consequence, the tests establishing these lower degrees of protection are not required,

except in case of doubt.

For IPX7, IPX8 and IPX9, it shall not be assumed that compliance of the enclosure implies that

the enclosure will also comply with all lower degrees of protection in Table 3.
Table 3 – Degrees of protection indicated by the second characteristic numeral
Degree of protection
Second
Test
characteristic
Brief description
conditions
Definition
numeral
(NOTE 1)
0 Non-protected machine No special protection No test

1 Machine protected against Dripping water (vertically falling drops) shall have no Table 5

dripping water harmful effect

2 Machine protected against Vertically dripping water shall have no harmful effect

dripping water when tilted when the machine is tilted at any angle up to 15°
up to 15° from its normal position
3 Machine protected against Water falling as a spray at an angle up to 60° from
spraying water the vertical shall have no harmful effect
4 Machine protected against Water splashing against the machine from any
...

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