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IEC 62873-3-1
Edition 2.0 2020-11
INTERNATIONAL
STANDARD
Residual current operated circuit-breakers for household and similar use –
Part 3-1: Particular requirements for devices with screwless-type terminals for
external copper conductors
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IEC 62873-3-1
Edition 2.0 2020-11
INTERNATIONAL
STANDARD
Residual current operated circuit-breakers for household and similar use –
Part 3-1: Particular requirements for devices with screwless-type terminals for
external copper conductors
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.50 ISBN 978-2-8322-9025-5
– 2 – IEC 62873-3-1:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Classification . 7
5 Characteristics of devices . 7
6 Marking and other product information . 7
7 Standard conditions for operation in service and for installation . 8
8 Requirements for construction and operation . 8
8.1 General . 8
8.2 Connection and disconnection of conductors . 8
8.3 Dimensions of conductors . 8
8.4 Connectable cross-sectional areas . 9
8.5 Insertion and withdrawal of conductors . 9
8.6 Design and construction of terminals . 9
8.7 Resistance to ageing . 10
9 Tests . 10
9.1 General . 10
9.2 Test of reliability of screwless-type terminals . 10
9.2.1 Reliability of screwless system . 10
9.2.2 Test of reliability of connection . 11
9.3 Tests of reliability of terminals for external conductors . 11
9.3.1 Mechanical strength. 11
9.3.2 Cycling test. 11
Bibliography . 15
Figure 1 – Connecting samples . 12
Figure 2 – Examples of screwless-type terminals . 14
Table 1 – Conductors and their theoretical diameters. 9
Table 2 – Cross-sections of copper conductors connectable to screwless-type
terminals . 9
Table 3 – Pull forces . 11
Table 4 – Test copper conductors corresponding to the rated currents . 12
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
FOR HOUSEHOLD AND SIMILAR USE –
Part 3-1: Particular requirements for devices with
screwless-type terminals for external copper conductors
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,
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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6) All users should ensure that they have the latest edition of this publication.
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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 62873-3-1 has been prepared by subcommittee 23E:
Circuit-breakers and similar equipment for household use, of IEC technical committee 23:
Electrical accessories.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Modification of scope to cover screwless-type terminals up to 40 A;
b) Modification of scope to address other devices in addition to RCDs;
c) Modification of Table 1 to cover rated currents up to 40 A;
– 4 – IEC 62873-3-1:2020 © IEC 2020
d) Modification of 8.1 so that IEC 62873-3-1 can be referred to by other product standards in
addition to those for RCDs;
e) Modification of 9.1 so that IEC 62873-3-1 can be referred to by other product standards in
addition to those for RCDs.
The text of this International Standard is based on the following documents:
FDIS Report on voting
23E/1190/FDIS 23E/1200/RVD
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 is intended to be referred to by a product standard of subcommittee
IEC SC23E (e.g. from the IEC 61008 series, IEC 61009 series, IEC 62606, and IEC 63052).
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62873 series, published under the general title Residual current
operated circuit-breakers for household and similar use, 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.
INTRODUCTION
This document is part of the series described in the outline document IEC 62873-1.
– 6 – IEC 62873-3-1:2020 © IEC 2020
RESIDUAL CURRENT OPERATED CIRCUIT-BREAKERS
FOR HOUSEHOLD AND SIMILAR USE –
Part 3-1: Particular requirements for devices with
screwless-type terminals for external copper conductors
1 Scope
This document applies to devices equipped with screwless-type terminals for current not
exceeding 40 A, primarily suitable for connecting unprepared copper conductors of
cross-section up to 10 mm .
This document cannot be used alone but is intended to be applied together with the applicable
product standard in which it is referred to.
NOTE 1 In CZ, DK, NL, PO and CH, the upper limit of current for use of screwless-type terminals is 16 A.
NOTE 2 In JP, the upper limit of current for use of screwless-type terminals is 30 A.
NOTE 3 The manufacturer can declare in its documentation specific conditions permitting the use of prepared
conductors.
In this document, screwless-type terminals are referred to as terminals, and copper
conductors are referred to as conductors.
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 62873-2, Residual current operated circuit-breakers for household and similar use –
Part 2: Residual current devices (RCDs) – Vocabulary
3 Terms and definitions
For the purpos
...