IEC 60670-1:2002/AMD1:2011

Amendment 1 - Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 1: General requirements

Amendement 1 - Boîtes et enveloppes pour appareillage électrique pour installations électriques fixes pour usages domestiques et analogues - Partie 1: Règles générales

General Information

• Status: Published
• Publication Date: 07-Mar-2011
• ICS: 29.120.10 - Conduits for electrical purposes
• Technical Committee: SC 23B - Plugs, socket-outlets and switches
• Drafting Committee: MT 5 - TC 23/SC 23B/MT 5
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 10-Mar-2015

Relations

• Amends: IEC 60670-1:2002 - Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 1: General requirements
• Effective Date: 05-Sep-2023
• Revised: IEC 60670-1:2015 - Boxes and enclosures for electrical accessories for household and similar fixed electrical installations - Part 1: General requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60670-1 ®
Edition 1.0 2011-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations –
Part 1: General requirements
Boîtes et enveloppes pour appareillage électrique pour installations électriques
fixes pour usages domestiques et analogues –
Partie 1: Règles générales
IEC 60670-1:2002/A1:2011
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IEC 60670-1 ®
Edition 1.0 2011-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations –
Part 1: General requirements
Boîtes et enveloppes pour appareillage électrique pour installations électriques
fixes pour usages domestiques et analogues –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE PRICE CODE
T
CODE PRIX
ICS 29.120.10 ISBN 978-2-88912-390-2

– 2 – 60670-1 Amend. 1  IEC:2011
FOREWORD
This amendment has been prepared by subcommittee 23B: Plugs, socket-outlets and
switches, of IEC technical committee 23: Electrical accessories.
The text of this amendment is based on the following documents:
FDIS Report on voting
23B/981/FDIS 23B/991/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
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.
______________
CONTENTS
Add, in the list of contents, the following new titles:
11.3 Boxes or enclosures with removable sides according to 7.1.2
11.4 Earthing terminal threads
Replace the title of Subclause 12.1.3 by the following new title:
12.1.3 Non screw-type fixing operable with the use of a tool or a key
Replace the titles of Subclause 12.8 by the following:
12.8 Knock-outs intended to be removed by mechanical impact
12.8.1 General
12.8.2 Knock-out retention
12.8.3 Knock-out removal
12.8.4 Flat surfaces surrounding knock-outs
Replace the title of Subclause 12.10 by the following:
12.10 Fixing of boxes and enclosures classified according to 7.2.1.1 and 7.2.1.2
Replace the title of Subclause 12.12 by the following:

60670-1 Amend. 1  IEC:2011 – 3 –
12.12 Fixing of boxes and enclosures classified according to 7.7.2
Add the following new titles:
12.15 Internal volume of boxes and enclosures
16.3.1 Mechanical strength
16.3.2 Parts of insulating material necessary to retain parts of the earthing circuit
Replace the title of Figure 4 by the following:
Figure 4 – Volume measurement (see 12.15)
Replace the title of Figure 5 by the following:
Figure 5 – Test wall (see 13.3.2)
Replace the title of Figure 7 by the following:
Figure 7 – Mounting block for flush type boxes and enclosures in order to apply blows
on the rear surface (See 15.3)
Replace the title of Figure 9 by the following:
Figure 9 – Height of fall for blows for part A ( See 15.3)
Replace the title of Figure 19 by the following:
Figure 19 – Test according to 12.12.3
Add the following new titles:
Figure 22 – Example of mounting block for boxes to be embedded in masonry (flush
type and semi-flush type) according to 12.10
Figure 23 – Example of the fixing of the auxiliary device mounted on a specimen
according to 12.10
Figure 24 – Example of test apparatus for the test according to 12.10
Figure 25 – Example of the protected volume (See 13.3.4)
Figure 26 – Demonstration of the non-penetration of the internal volume
2 Normative references
Add the following new reference:
IEC 62444:2010, Cable glands for electrical installations

– 4 – 60670-1 Amend. 1  IEC:2011
3 Definitions
3.10
cable gland
Replace the definition of 3.10 by the following:
a device designed to permit the entry of a cable, flexible cable or insulated conductor into an
enclosure, and which provides sealing and retention. It may also provide other functions such
as earthing, bonding, insulation, cable guarding, strain relief or a combination of these
Add the following new definition after Definition 3.19:
3.20
blanking-plug
a blanking-plug is a component used to close an open inlet or an open knock out
Table 1 – Classification of boxes and enclosures
Add the following new row after the row concerning 7.7:
7.8 The provision for fixing 7.8.1 Boxes supplied with
accessories to boxes screws
7.8.2 Boxes intended to receive
screws
7.8.3 Boxes intended to receive
claws
7.8.4 Boxes intended to receive
other means
8 Marking
8.1
Move item e) after the third paragraph, before the paragraph commencing with “The following
information.”.
Add the following NOTE after 8.1 e):
NOTE In the following country the marking of the type reference is not used: UK.
Replace the reference to 12.12.5 in 8.1i) by 12.15.
8.2
Replace NOTE 1 by the following:
NOTE 1Marking made by moulding, pressing or engraving is considered durable and is therefore not subjected to
this test.
10 Protection against electric shock
Replace the existing text by the following:

60670-1 Amend. 1  IEC:2011 – 5 –
Boxes and enclosures shall be so designed that, when they are assembled, equipped and
installed as for normal use in accordance with the manufacturer's instructions, live parts are
not accessible.
Where enclosures are supplied without a cover, cover-plate or an accessory they are tested
with the appropriate parts fitted according to the information given in the manufacturer's
instructions.
Compliance is checked by inspection and in case of doubt by the following test.
Enclosures shall be tested with test probe 11 according to IEC 61032 applied for 1 min with a
force of 20 N, and the test probe shall not penetrate in the internal volume of the enclosure,
as shown in Figure 26.
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 made of thermoplastic or
elastomeric material shall be subjected for 1 min to a force applied through the tip of test
probe 11 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 75 N.
11 Provision for earthing
Replace Subclauses 11.1 and 11.2 by the following:
11.1 Boxes and enclosures with exposed conductive parts
Boxes and enclosures with exposed conductive parts shall be provided with an earthing
means of low resistance or have provision for the fitting of such an earthing means. For the
purpose of this requirement, small screws and the like, for fixing bases, covers or coverplates,
etc. isolated from live parts, are not considered as exposed conductive parts.
The earthing means or the provision for the fitting of such an earthing means shall be located
so that:
– the means is readily accessible through the open face of the box, and
– the removal of an accessory mounted in the box does not disturb the continuity of the
earthing circuit, and
– the means is not part of a removable cover, back, or side of the box or enclosure.
Compliance is checked by inspection.
Exposed conductive parts of covers or cover-plates shall be connected through a low
resistance connection to the earthing means when fitted as for normal use.
Compliance is checked by the following test.
A current derived from an a.c. source having a no-load voltage not exceeding 12 V and equal
to (25 ± 1) A is passed between the earthing terminal and each exposed conductive part in
turn. The voltage drop between the earthing terminal and each of the exposed conductive
parts is measured, and the resistance calculated from the current and this voltage drop.
In no case shall the resistance exceed 0,05 Ω.

– 6 – 60670-1 Amend. 1  IEC:2011
NOTE 1 Care should be taken that the contact resistance between the tip of the measuring probe and the
exposed conductive part under test does not influence the test results.
NOTE 2 In insulating boxes and enclosures having an IP degree higher than IPX0, provisions can be made for the
addition of means for the effective continuity of the earthing conductor, when more than one inlet is provided.
11.2 Boxes and enclosures of insulating material classified according to 7.7.2
Boxes and enclosures of insulating material shall be provided with a minimum of one earthing
strap having one screw terminal for earthing purposes with a connecting capacity of at least
4 mm . The design of the earthing strap shall ensure that the metal mounting yokes of
accessories mounted inside the box and metallic covers mounted on the box are connected to
the earthing conductors (see Figure 2).
Compliance is checked by inspection.
The earthing strap shall be securely fastened to the box or enclosure.
Compliance is checked by the test in 16.3.2.
Add the following new Subclauses 11.3 and 11.4 after Subclause 11.2:
11.3 Boxes or enclosures with removable sides according to 7.1.2
A box or enclosure classified according to 7.1.2 that has removable sides shall be constructed
so that the electrical bond between separable parts includes at least one threaded screw
connection.
Compliance is checked by inspection.
11.4 Earthing terminal threads
The threads of the earthing terminal delivered with or integrated in boxes and enclosures shall
not be stripped when the torque shown in the relevant column of Table 4 is applied.
Compliance is checked by inspection and by the following test.
The screws are tightened and loosened 5 times.
The test is made by using a
...