IEC 60670-21:2024
(Main)Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 21: Particular requirements for boxes and enclosures with provision for suspension means
Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 21: Particular requirements for boxes and enclosures with provision for suspension means
IEC 60670-21:2024 applies to boxes, enclosures and parts of enclosures (hereafter called "boxes" and "enclosures") for electrical accessories with a rated voltage not exceeding 1 000 V AC and 1 500 V DC intended for household or similar fixed electrical installations, either indoors or outdoors. Boxes and enclosures complying with this document are suitable for use at ambient temperatures not normally exceeding +40 °C, but their average over a period of 24 h does not exceed +35 °C, with a lower limit of the ambient air temperature of −5 °C. Other temperatures outside the above range can apply according to the classification of the boxes and the enclosures. This document applies to boxes and enclosures for ceiling and wall mounting with provision for suspension means. This second edition cancels and replaces the first edition published in 2004 and Amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Complete revision of the tests and requirements of the suspension means.
Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes pour usages domestiques et analogues - Partie 21: Règles particulières concernant les boîtes et enveloppes avec dispositifs de suspension
L'IEC 60670-21:2024 s'applique aux boîtes, enveloppes et parties d'enveloppes (ci-après désignées par les termes "boîtes" et "enveloppes") pour appareillages électriques dont la tension assignée ne dépasse pas 1 000 V en courant alternatif et 1 500 V en courant continu pour installations électriques fixes pour usages domestiques et analogues, en intérieur ou en extérieur. Les boîtes et enveloppes conformes au présent document sont adaptés à un usage à des températures ambiantes qui ne dépassent pas habituellement +40 °C, mais dont la moyenne sur une période de 24 h ne dépasse pas +35 °C, avec une limite basse de la température ambiante de −5 °C. D'autres températures situées en dehors de la plage ci-dessus peuvent s'appliquer selon la classification des boîtes et enveloppes. Le présent document s'applique aux boîtes et enveloppes pour plafonds et murs, avec des dispositions pour dispositifs de suspension. Cette deuxième édition annule et remplace la première édition parue en 2004 et son Amendement 1:2016. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les essais et exigences pour les dispositifs de suspension ont fait l'objet d'une révision complète.
La version française de la norme n'a pas été soumise au vote.
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IEC 60670-21 ®
Edition 2.0 2024-12
REDLINE VERSION
INTERNATIONAL
STANDARD
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Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations –
Part 21: Particular requirements for boxes and enclosures with provision for
suspension means
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IEC 60670-21 ®
Edition 2.0 2024-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations –
Part 21: Particular requirements for boxes and enclosures with provision for
suspension means
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.99 ISBN 978-2-8327-0111-9
– 2 – IEC 60670-21:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 7
5 General notes remarks on tests . 7
6 Ratings . 7
7 Classification . 8
8 Marking . 8
9 Dimensions. 8
10 Protection against electric shock . 8
11 Provision for earthing . 9
12 Construction . 9
13 Resistance to ageing, protection against ingress of solid objects and against
harmful ingress of water . 9
14 Insulation resistance and electric strength . 9
15 Mechanical strength . 9
16 Resistance to heat . 13
17 Creepage distances, clearances and distances through sealing compound . 14
18 Resistance of insulating material to abnormal heat and to fire . 14
19 Resistance to tracking . 14
20 Resistance to corrosion . 14
21 Electromagnetic compatibility (EMC) . 14
Figure 101 – Examples of suspension means . 7
Figure 102 – Examples of boxes and enclosures with provision for suspension means . 10
Figure 103 – Verification of suspension means intended to be used on a wall . 12
Figure 104 – Inclined ceiling test. 13
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR
HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS –
Part 21: Particular requirements for boxes and
enclosures with provision for suspension means
FOREWORD
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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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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60670-21:2004+AMD1:2016 CSV. A vertical bar appears
in the margin wherever a change has been made. Additions are in green text, deletions
are in strikethrough red text.
– 4 – IEC 60670-21:2024 RLV © IEC 2024
IEC 60670-21 has been prepared by subcommittee 23B: Plugs, socket-outlets and switches, of
IEC technical committee 23: Electrical accessories. It is an International Standard.
This second edition cancels and replaces the first edition published in 2004 and
Amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Complete revision of the tests and requirements of the suspension means.
The text of this International Standard is based on the following documents:
Draft Report on voting
23B/1534/FDIS 23B/1552/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60670 series, published under the general title Boxes and enclosures
for electrical accessories for household and similar fixed installations, can be found on the IEC
website.
This document is to be used in conjunction with IEC 60670-1:2024. 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 document states "addition", "modification" or "replacement", the relevant
requirement, test specifications or explanatory matter in IEC 60670-1:2024 shall be adapted
accordingly.
Clauses and subclauses, notes, figures or tables which are additional to those in
IEC 60670-1:2024 are numbered starting from 101.
Additional annexes to IEC 60670-1:2024 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.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document 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.
– 6 – IEC 60670-21:2024 RLV © IEC 2024
BOXES AND ENCLOSURES FOR ELECTRICAL ACCESSORIES FOR
HOUSEHOLD AND SIMILAR FIXED ELECTRICAL INSTALLATIONS –
Part 21: Particular requirements for boxes and
enclosures with provision for suspension means
1 Scope
Clause 1 of IEC 60670-1:2024 is applicable with the following modification:
Addition after the fourth third paragraph:
This document applies to boxes and enclosures for ceiling and wall mounting with provision for
suspension means.
2 Normative references
Clause 2 of IEC 60670-1:2024 is applicable.
3 Terms and definitions
Clause 3 of IEC 60670-1:2024 is applicable with the following modification:
Addition:
3.101
box with provision for suspension means
box intended to be used for suspending and supporting mechanical loads and which accepts
the suspension me
...
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