EN 60670-24:2013

SLOVENSKI STANDARD
01-junij-2013
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Boxes and enclosures for electrical accessories for household and similar fixed electrical
installations - Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment (IEC 60670-24:2011, modified)
Dosen und Gehäuse für Installationsgeräte für Haushalt und ähnliche ortsfeste
elektrische Installationen - Teil 24: Besondere Anforderungen für Gehäuse zur Aufnahme
von Schutzgeräten und ähnlichen energieverbrauchenden Geräten (IEC 60670-24:2011,
modifié)
Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes
pour usages domestiques et analogues - Partie 24: Exigences particulières pour
enveloppes pour appareillages de protection et autres appareillages électriques ayant
une puissance dissipée (CEI 60670-24:2011, modifiziert)
Ta slovenski standard je istoveten z: EN 60670-24:2013
ICS:
29.120.99 'UXJDHOHNWULþQDGRGDWQD Other electrical accessories
RSUHPD
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60670-24
NORME EUROPÉENNE
April 2013
EUROPÄISCHE NORM
ICS 29.120.10
English version
Boxes and enclosures for electrical accessories for household and similar
fixed electrical installations -
Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment
(IEC 60670-24:2011, modified)
Boîtes et enveloppes pour appareillage Dosen und Gehäuse für
électrique pour installations électriques Installationsgeräte für Haushalt und
fixes pour usages domestiques et ähnliche ortsfeste elektrische
analogues - Installationen -
Partie 24: Exigences particulières pour Teil 24: Besondere Anforderungen für
enveloppes pour appareillages de Gehäuse zur Aufnahme von
protection et autres appareillages Schutzgeräten und ähnlichen
électriques ayant une puissance dissipée energieverbrauchenden Geräten
(CEI 60670-24:2011, modifiée) (IEC 60670-24:2011, modifiziert)

This European Standard was approved by CENELEC on 2013-03-04. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60670-24:2013 E
Contents Page
Foreword . 3
1 Scope . 4
2 Normative references . 4
3 Definitions . 4
7 Classification . 4
8 Marking . 4
12 Construction . 4
13 Resistance to ageing, protection against ingress of solid foreign objects and against
harmful ingress of water . 4
17 Creepage distances, clearances and distances through sealing compound . 5
101 Verification of the maximum capability to dissipate power (P ) . 5
de
Annex ZA (normative) Normative references to international publications with their
corresponding European publications . 6
Annex ZB (normative) Special national conditions . 7
Annex ZC (informative) A-deviations . 8

- 3 - EN 60670-24:2013
Foreword
This document (EN 60670-24:2013) consists of the text of IEC 60670-24:2011 prepared by IEC/SC 23B
"Plugs, socket-outlets and switches" of IEC/TC 23 "Electrical accessories", together with the common
modifications prepared by CLC/TC 23BX "Switches, boxes and enclosures for household and similar
purposes, plugs and socket outlets for d.c. and for the charging of electrical vehicles including their
connectors".
The following dates are fixed:
(dop) 2014-03-04
• latest date by which this document has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dow) 2018-03-04
• latest date by which the national standards conflicting
with this document have to be withdrawn
This Part 24 is to be used in conjunction with EN 60670-1:2005. It lists the changes necessary to convert
that standard into a specific standard for housing protective devices and other power dissipating electrical
equipment.
Where this Part 24 states "addition“, "modification“ or "replacement“, the relevant requirement, test
specifications or explanatory matter in Part 1 shall be adapted accordingly.
Clauses and subclauses, notes, figures or tables which are additional to those in Part 1 are numbered
starting from 101.
Additional annexes to Part 1 are numbered AA, BB, etc.

In this publication the following print types are used:
• requirements proper: in roman type.
• test specifications: in italic type.
• notes: in smaller roman type.
Clauses, subclauses, notes, tables and figures which are additional to those in IEC 60670-24:2011 are
prefixed “Z”.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed
for Use within Certain Voltage Limits (LVD - 2006/95/EC).

Endorsement notice
The text of the International Standard IEC 60670-24:2011 was approved by CENELEC as a European
Standard with agreed common modifications.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60439-3:1991 NOTE  Harmonised as EN 60439-3:1991 (modified).

COMMON MODIFICATIONS
1 Scope
Delete NOTES 2 and 3.
2 Normative references
Replace by the following:
See Annex ZA.
3 Definitions
In 3.101, delete 'BE'.
7 Classification
Delete the notes at the end of the addition to Table 1.
8 Marking
In 8.101, bullet 3, delete from the dashed texts twice the words "accompanying the enclosure".
12 Construction
Replace the title of 12.11 by the following:
12.11 Enclosures classified according to 7.2.1.3
Replace the first paragraph by the following:
"Enclosures for hollow walls classified according to 7.2.1.3 shall provide suitable means for fixing the
enclosure to hollow walls."
In 12.101, delete the NOTE.
13 Resistance to ageing, protection against ingress of solid foreign objects and
against harmful ingress of water
In 13.2, delete the NOTE.
- 5 - EN 60670-24:2013
17 Creepage distances, clearances and distances through sealing compound
Replace the first paragraph after Table 101 by:
"Compliance is checked by inspection and in case of doubt by measurement between the following
parts:"
101 Verification of the maximum capability to dissipate power (P )
de
Delete NOTE 103.
Annexes
Add the following annexes.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE  Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
Addition to the Annex ZA of EN 60670-1:2005:
Publication Year Title EN/HD Year
IEC 60417 - Graphical symbols for use on equipment - -
IEC 60898-1 - Electrical accessories - Circuit breakers for EN 60898-1 -
overcurrent protection for household and similar
installations
Part 1: Circuit-breakers for a.c. operation
IEC 61008-2-1 - Residual current operated circuit-breakers without EN 61008-2-1 -
integral overcurrent protection for household and
similar uses (RCCB's)
Part 2-1: Applicability of the general rules to
RCCB's functionally independent of line voltage
IEC 61009-2-1 - Residual current operated circuit-breakers with EN 61009-2-1 -
integral overcurrent protection for household and
similar uses (RCBO's)
Part 2-1: Applicability of the general rules to
RCBO's functionally independent of line voltage
IEC 62262 - Degrees of protection provided by enclosures for EN 62262 -
electrical equipment against external mechanical
impacts (IK code)
- 7 - EN 60670-24:2013
Annex ZB
(normative)
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a long
period, e.g. climatic conditions, electrical earthing conditions.
NOTE  If it affects harmonization, it forms part of the European Standard.
For the countries in which the relevant special national conditions apply these provisions are normative,
for other countries they are informative.
Clause Special national condition
1 Denmark
This standard can only be used for GP enclosures with the instructions according to
Annex A. For the other types of enclosures the integration of mechanical and electrical
devices into an enclosures are verified by compliance with DS EN 60439-3.
7 Denmark, Italy
Only enclosures according to 7.101.1 and 7.102.1 can be used.
Belgium, Germany, France, Greece
Only enclosures classified according to 7.101.2 and 7.102.2 can be used.
12.101
United Kingdom
The text of this clause does not apply. Cables are retained using fixing means
applied during installation by the installer.
Denmark
13.2
In the case of an enclosure with a door or a lid which can be opened without the
use of a tool during normal use, a minimum degree of IP30 shall be maintained
after opening the door or the lid.

Annex ZC
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the
competence of the CENELEC national member.
This European Standard falls under Directive 2006/95/EC.
NOTE (from CEN/CENELEC IR Part 2:2011, 2.17)  Where standards fall under EU Directives, it is the view of the
Commission of the European Communities (OJ No C 59, 1982-03-09) that the effect of the decision of the Court of
Justice in case 815/79 Cremonini/Vrankovich (European Court Reports 1980, p. 3583) is that compliance with A-
deviations is no longer mandatory and that the free movement of products complying with such a standard should not
be restricted except under the safeguard procedure provided for in the relevant Directive.
A-deviations in an EFTA-country are valid instead of the relevant provisions of the European Standard in
that country until they have been removed.
Clause Deviation
1 United Kingdom
{Electricity, Safety, Quality and Continuity Regulations; SI ‘2002 2665’}
Add after the second paragraph:
This standard cannot be used in installations with a 230 V single-phase supply rated up to
100 A that is under the control of ordinary persons. Integration of mechanical and
electrical devices into an enclosure must be verified by compliance with BS EN 60439-3.

IEC 60670-24 ®
Edition 2.0 2011-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations –
Part 24: Particular requirements for enclosures for housing protective devices
and other power dissipating electrical equipment

Boîtes et enveloppes pour appareillage électrique pour installations électriques
fixes pour usages domestiques et analogues –
Partie 24: Exigences particulières pour enveloppes pour appareillages de
protection et autres appareillages électriques ayant une puissance dissipée

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 29.120.10 ISBN 978-2-88912-391-9

– 2 – 60670-24  IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Definitions . 7
4 General requirements . 8
5 General notes on tests . 8
6 Ratings . 8
7 Classification . 8
8 Marking . 8
9 Dimensions . 10
10 Protection against electric shock. 10
11 Provisions for earthing . 11
12 Construction . 11
13 Resistance to ageing, protection against ingress of solid foreign objects and
against harmful ingress of water . 12
14 Insulation resistance and electric strength . 12
15 Mechanical strength . 12
16 Resistance to heat . 12
17 Creepage distances, clearances and distances through sealing compound . 12
18 Resistance of insulating material to abnormal heat and to fire. 13
19 Resistance to tracking . 13
20 Resistance to corrosion . 14
21 Electromagnetic compatibility . 14
101 Verification of the maximum capability to dissipate power (P ) . 14
de
102 Verification of temperature rise . 15
Annex AA (normative) Instructions to be given by the manufacturer of the GP
enclosure to the installer how to integrate accessories, and example of calculation . 22
Annex BB (normative) Instructions to be given by the manufacturer of the PD
enclosure to the installer how to integrate accessories . 30
Bibliography . 32

Figure 101 – Arrangement for the verification of the maximum capability to dissipate
power (P ) and for verification of temperature rise of surface type enclosures . 17
de
Figure 102 – Heating resistor for the verification of the maximum capability to dissipate
) . 18
power (P
de
Figure 103 – Position of the resistor for enclosures designed or intended to be fitted
with rail mounting modular accessories and electrical equipment . 19
Figure 104 – Position of the resistor(s) for enclosures other than those designed or
intended to be fitted with rail mounting accessories and electrical equipment . 20
Figure 105 – Position of the resistor(s) for enclosures other than those designed or
intended to be fitted with rail mounting accessories and electrical equipment and
allowing the mounting of several accessories and electrical equipment in different
positions . 21

60670-24  IEC:2011 – 3 –
Table 1 – Classification of boxes and enclosures . 8
Table 101 – Creepage distances, clearances and distances through sealing compound . 13
Table 102 – Diversity factor . 16
Table 103 – Temperatures of accessible surfaces . 17
Table AA.1 – Diversity factor . 24
Table AA.2 – Tests and verifications . 25
Table AA.3 – Calculation of P . 28
dp
Table AA.4 – Calculation of P . 29
au
– 4 – 60670-24  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR
HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS –

Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment

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 60670-24 has been prepared by subcommittee 23B: Plugs, socket-
outlets and switches, of IEC technical committee 23: Electrical accessories.
This second edition cancels and replaces the first edition published in 2005 and constitutes a
technical revision.
The following major changes from the first edition are introduced:
• new definition for basic, general purpose enclosures (GP enclosure) and enclosures for
pre-determined equipment (PD enclosure);
• new classification and marking for general purpose enclosure (GP enclosure) and
enclosure for pre-determined equipment (PD enclosure);
• required data for instruction sheet and/or documentation according to the type of
enclosure;
60670-24  IEC:2011 – 5 –
• adequate space to allow mounting and connection of the accessories (fully equipped) as
declared by the manufacturer;
• requirements for general purpose enclosure (GP enclosure) as in Clause 101;
• requirements for enclosure for pre-determined equipment (PD enclosure) as in Clause
102;
• instructions to be given by the manufacturer of the GP enclosure to the installer how to
integrate accessories and example of calculation given in Annex AA;
• instructions to be given by the manufacturer of the PD enclosure to the installer how to
integrate accessories given in Annex BB.
The text of this standard is based on the following documents:
FDIS Report on voting
23B/982/FDIS 23B/992/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This standard shall be used in conjunction with IEC 60670-1. It lists the changes necessary to
convert that standard into a specific standard for housing protective devices and other power
dissipating electrical equipment.
Where this Part 24 states "addition“, "modification“ or "replacement“, the relevant
requirement, test specifications or explanatory matter in Part 1 shall be adapted accordingly.
Clauses and subclauses, notes, figures or tables which are additional to those in Part 1 are
numbered starting from 101.
Additional annexes to Part 1 are numbered AA, BB, etc.
In this publication the following print types are used:
• requirements proper: in roman type.
• test specifications: in italic type.
• notes: in smaller roman type.
A list of all the parts in the IEC 60670 series, under the general title Boxes and enclosures for
electrical accessories for household and similar fixed electrical installations, can be found on
the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – 60670-24  IEC:2011
BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR
HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS –

Part 24: Particular requirements for enclosures for housing protective
devices and other power dissipating electrical equipment

1 Scope
Replacement:
This part of IEC 60670 applies to enclosures and parts of them for housing protective devices
and other power dissipating electrical equipment intended to be used with a rated voltage not
exceeding 400 V and a total incoming load current not exceeding 125 A for household and
similar fixed electrical installations.
These enclosures are intended to be installed where unskilled persons have access. They are
intended to be integrated with electrical equipment on site by skilled persons (installers).
They are intended to be installed where the prospective short circuit current does not exceed
10 kA unless they are protected by current limiting protective devices with a cut-off current not
exceeding 17 kA.
Enclosures complying with this standard are suitable for use, after installation, at ambient
temperature not normally exceeding 25 °C, but occasionally reaching 35 °C over 24 h, max.
40 °C and min. –5 °C.
An enclosure which is an integral part of an electrical accessory and provides protection
against external influences (e.g. mechanical impacts, ingress of solid objects or of water), is
covered by the relevant standard for such an accessory.
This standard does not apply to a low-voltage switchgear and controlgear assembly
(ASSEMBLY) as defined in the IEC 60439 or IEC 61439 series of standards nor to a main
entrance panel which may or may not be part of the distribution board.
NOTE 1 A main entrance panel is a set composed by a panel or an enclosure equipped with a meter and/or the
main incoming device. Main entrance panels comply with their appropriate standards or the requirements of the
local supplier if any.
NOTE 2 In the following country this standard cannot be used in installations with a 230 V single-phase supply
rated up to 100 A that is under the control of ordinary persons. Integration of mechanical and electrical devices into
an enclosure must be verified by compliance with IEC 60439-3 [British standard EN 60439-3]: UK.
NOTE 3 In the following country this standard can only be used for GP enclosures with the instructions according
to Annex A. For the other types of enclosures the integration of mechanical and electrical devices into an enclosure
is verified by compliance with DS EN 60439-3: DK.
2 Normative references
Addition:
IEC 60417, Graphical Symbols for Use on Equipment
IEC 60898-1, Electrical accessories - Circuit-breakers for overcurrent protection for household
and similar installations - Part 1: Circuit-breakers for a.c. operation

60670-24  IEC:2011 – 7 –
IEC 61008-2-1, Residual current operated circuit-breakers without integral overcurrent
protection for household and similar uses (RCCB's) - Part 2-1: Applicability of the general
rules to RCCB's functionally independent of line voltage
IEC 61009-2-1, Residual current operated circuit-breakers with integral overcurrent protection
for household and similar uses (RCBO's) - Part 2-1: Applicability of the general rules to
RCBO's functionally independent of line voltage
IEC 62262, Degrees of protection provided by enclosures for electrical equipment against
external mechanical impacts (IK code)
3 Definitions
Addition:
3.101
basic enclosure
BE
enclosure containing only mounting means
3.102
general purpose enclosure
GP enclosure
empty enclosure or basic enclosure where integration of mechanical and electrical devices
has been verified by tests carried out by the manufacturer according to the present standard
and where the installer has to verify the installed equipment by information given in Annex AA
3.103
enclosure for pre-determined equipment
PD enclosure
empty enclosure or basic enclosure where the capability to integrate pre-determined
mechanical and electrical equipment has been verified according to design rules and tests
according to the present standard carried out by the manufacturer where the installer has to
verify the installed equipment following the design instruction declared by the manufacturer
according to Annex BB
3.104
manufacturer's design instructions
instructions in accordance to Annexes AA and BB leading to a configuration of the enclosure
ensuring the necessary heat dissipation. Standards can be part of those manufacturer design
instructions.
3.105
maximum capability to dissipate power

P
de
maximum capability of the enclosure to dissipate in normal use the power losses of the
installed devices, as declared by the manufacturer
NOTE P is expressed in watts (W).
de
3.106
rated current
I
n
current assigned by the manufacturer of the enclosure corresponding to the highest rated
current of the incoming device(s) to be installed in the enclosure

– 8 – 60670-24  IEC:2011
3.107
rated voltage
U
n
voltage assigned by the manufacturer of the enclosure
4 General requirements
This clause of Part 1 is applicable.
5 General notes on tests
This clause of Part 1 is applicable.
6 Ratings
Replacement:
Void.
7 Classification
This clause of Part 1 is applicable with the following modifications:
Table 1 – Classification of boxes and enclosures
Classification criteria 7.7.2 and 7.7.3.1 do not apply.
Addition:
7.101 Empty enclosure 7.101.1 GP enclosure
7.101.2 PD enclosure
7.102 Basic enclosure 7.102.1 GP enclosure
7.102.2 PD enclosure
NOTE 101 In the following countries only enclosures classified according to 7.101.2 and 7.102.2 can be used:
BE, DE, FR and GR.
NOTE 102 In the following country only enclosures according to 7.101.1 and 7.102.1 can be used: DK.

8 Marking
This clause of Part 1 is applicable with the following modifications:
Replacement:
8.1 Enclosures shall be marked with
a) the name, trade mark or identification mark of the manufacturer or the responsible vendor;
b) IP code against ingress of solid foreign objects and against access to hazardous parts if
higher than IP3X and/or if IP code against harmful ingress of water is higher than IPX0.
The IP code, if applicable, shall be marked on the outside of the enclosure so as to be
easily discernible when the enclosure is mounted and wired as for normal use. The

60670-24  IEC:2011 – 9 –
visibility of the marking is also allowed after opening the door or the lid if a minimum
degree of IP20 is maintained after opening;
c) the symbol for total insulation, if applicable (IEC 60417-5172 (2003-02)) ;
d) type designation, reference number or catalogue number;
e) letter N for terminals intended exclusively for the neutral conductor, if any;
f) symbol according to IEC 60417-5019 (2006-08) for earthing terminals for the
connection of the protective conductor, if any.
Markings of neutral terminals and earthing terminals shall not be placed on screws, or any
other easily removable parts.
The following information shall be marked on the boxes and enclosures or provided by the
manufacturer on the smallest package unit or in the instructions of the manufacturer:
g) rated voltage;
h) rated current as declared by the manufacturer for enclosures classified according to
7.101.2 and 7.102.2;
i) reference number of this standard i.e. IEC 60670-24;
j) maximum temperature during the building process if 90 °C;
k) for enclosures classified according to 7.3.7 (without inlets), the necessary information
concerning the openings that can be made during installation;
l) for enclosures classified according to 7.101.1 and 7.102.1, the maximum capability to
dissipate power (P );
de
NOTE 1 In case of an enclosure designed with ventilation openings, the maximum capability to dissipate power
(P ) should be declared by the manufacturer, for both closed and open openings.
de
m) for enclosures classified according to 7.7 the usability for hollow wall installation;
n) the corresponding dimension sheet, if any;
p) for enclosures classified according to
• 7.101.1 and 7.102.1 the marking "GP";
• 7.101.2 and 7.102.2 the marking "PD"
NOTE 2 Easily removable parts are those parts which can be removed during the normal installation of the
enclosure.
Addition:
8.101 Required data for instruction sheet and/or documentation
The manufacturer shall
• provide appropriate instructions regarding the means (for instance glands, grommets,
barriers…) to be used to obtain the intended degree of protection;
• give information to the installer concerning the verification of the electrical continuity of the
protective circuit (see Clause 11);
• give to the installer the necessary instructions:
– for enclosures classified according to 7.101.1 and 7.102.1 the manufacturer shall
include in the documentation accompanying the enclosure the necessary instructions
for installation and how to integrate accessories as given in Annex AA;
– for enclosures classified according to 7.101.2 and 7.102.2 the manufacturer shall
include in the documentation accompanying the enclosure the necessary instructions

– 10 – 60670-24  IEC:2011
for installation according to the appropriate mounting environment as given in
Annex BB.
9 Dimensions
This clause of Part 1 is applicable.
10 Protection against electric shock
This clause of Part 1 is applicable with the following modifications:
nd
Deletion of the 2 paragraph.
Addition:
10.101 Enclosures are tested completed with the necessary means (such as grommets…)
indicated in the manufacturer’s instruction and the window opening(s), if any, completely filled
up with blank inserts delivered by the manufacturer and/or samples of products as declared
by the manufacturer.
Enclosures shall have a degree of protection of at least IPXXC, when mounted and installed
as for normal use, according to the manufacturer’s instruction.
When mounted and installed as for normal use, enclosures with total insulation shall
a) completely enclose the installed equipment in insulating material, and
b) at no point be pierced by conducting parts in such a manner that there is a possibility of a
fault voltage being brought out of the enclosure, and
c) not have conductive parts, such as plates, cover-plates or frames connected to the
protective circuit.
If doors or covers of the enclosure can be opened without the use of a key or tool, they shall
be left open during the test.
Compliance is checked by inspection and in case of doubt by the following test.
Enclosures shall be tested with test probe C according to IEC 61032 applied for 1 min with a
force of 3 N, and the test probe shall not enter that part of the enclosure where live parts are
to be installed according to the manufacturer's instructions.
Tests shall be carried out on parts which are accessible after installation.
In addition, all enclosures according to 7.1.1 and 7.1.3 with parts of thermoplastic or
elastomeric material shall be subjected for 1 min to a force applied through the tip of test
probe C of IEC 61032 but at an ambient temperature of (35 ± 2) °C, the enclosure being at
this temperature.
The probe is applied to
– all places except membranes or the like, where yielding of insulating material could impair
the safety, with a force of 3 N;
– knock-outs with a force of 3 N.

60670-24  IEC:2011 – 11 –
11 Provisions for earthing
This clause of Part 1 is applicable with the following addition:
Addition:
11.101 The electrical continuity of the protective circuit, if any, shall be checked.
Except for enclosures intended to be used for total insulation, all exposed conductive parts of
the enclosure shall be connected separately or in groups to the protective circuit terminals.
Compliance is checked by inspection and, if necessary, by a continuity test of the protective
circuit.
A measurement shall be carried out to verify that the resistance between the terminal of the
incoming protective conductor and the exposed conductive parts shall be less than 0,05 Ω
with a current of 10 A a.c. or d.c.
12 Construction
This clause of Part 1 is applicable with the following modifications:
12.1 Lids, covers or cover-plates or parts of them
Replacement:
Lids, covers, cover plates or parts of them, which are intended to ensure protection against
electric shock, shall be held in place effectively. They shall be removable only by the use of a
tool and/or a key.
12.11 Enclosures classified according to 7.7.1
Replacement:
Enclosures for hollow walls classified according to 7.7.1 shall provide suitable means for
fixing the enclosure to hollow walls.
Compliance is checked by inspection.
Addition:
12.101 Enclosures for hollow walls shall have provisions for retention means for cables or
means to use a separate retention device or devices.
NOTE In the following country, cables are retained using fixing means applied during installation by the installer:
UK.
Compliance is checked by inspection.
12.102 Enclosures shall have enough space to allow mounting and connection of the
accessories (fully equipped) as declared by the manufacturer, in safe way.
Compliance is checked by inspection and in case of doubt by manual test using samples of
products as declared by the manufacturer and complying with the relevant standard, if any.

– 12 – 60670-24  IEC:2011
Any generally available conductors having the largest nominal cross-sectional area as
declared by the manufacturer shall be used.
13 Resistance to ageing, protection against ingress of solid foreign objects and
against harmful ingress of water
This clause of Part 1 is applicable with the following modification:
13.2 Protection against the ingress of solid foreign objects
Replacement of the first paragraph:
Enclosures shall provide a degree of protection of at least IP3X against the ingress of solid
foreign objects in accordance with their declared IP code with the lid closed, if any.
In the case of an enclosure with a door or a lid which can be opened without the use of a tool
during normal use, a minimum degree of IP20 shall be maintained after opening the door or
the lid.
NOTE In the following countries in the case of an enclosure with a door or a lid which can be opened without the
use of a tool during normal use, a minimum degree of IP30 shall be maintained after opening the door or the lid:
DE, DK.
14 Insulation resistance and electric strength
This clause of Part 1 is applicable.
15 Mechanical strength
This clause of Part 1 is applicable.
Addition:
15.101 PD enclosure shall provide a degree of protection against external mechanical
impact in accordance with their declared IK code.
Compliance is checked by the relevant test of IEC 62262.
16 Resistance to heat
This clause of Part 1 is applicable.
17 Creepage distances, clearances and distances through sealing compound
Replacement:
Creepage distances, clearances and distances through sealing compound shall not be less
than the value shown in Table 101.

60670-24  IEC:2011 – 13 –
Table 101 – Creepage distances, clearances and distances through sealing compound
Rated voltage Creepage distance, clearance and distance through
sealing compound
V
mm
130 1,5
>130 and ≤250 3,0
4,0
>250 and ≤400
Compliance is checked by measurement between the following parts:
Creepage distances and clearances:
• between live parts of different polarity;
• between live parts and
− metal covers and enclosures without insulating lining;
− the surface on which the enclosure is mounted.
Distances through sealing compound:
– between live parts covered with sealing compound and the surface on which the enclosure
is mounted.
For multi-way terminal devices and terminals without fixing means but with protection,
distances are measured between live parts and any opening which represents the closest
point liable to touch any other part when the terminal is fitted with conductors having the
largest cross-sectional area.
In cases where various termi
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