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

IEC 62873-3-1:2020 is available as IEC 62873-3-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62873-3-1:2020 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 mm2. 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:
- Modification of scope to cover screwless-type terminals up to 40 A;
- Modification of scope to address other devices in addition to RCDs;
- Modification of Table 1 to cover rated currents up to 40 A;
- Modification of 8.1 so that IEC 62873-3-1 can be referred to by other product standards in addition to those for RCDs;
- Modification of 9.1 so that IEC 62873-3-1 can be referred to by other product standards in addition to those for RCDs.

General Information

Status
Published
Publication Date
19-Nov-2020
Current Stage
PPUB - Publication issued
Completion Date
20-Nov-2020
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IEC 62873-3-1:2020 - 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
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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
IEC 62873-3-1:2020-11(en)
---------------------- Page: 1 ----------------------
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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

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

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

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IEC 62873-3-1:2020 © IEC 2020 – 3 –
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

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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;
---------------------- Page: 5 ----------------------
– 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.
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IEC 62873-3-1:2020 © IEC 2020 – 5 –
INTRODUCTION

This document is part of the series described in the outline document IEC 62873-1.

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– 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 purposes of this document, the terms and definitions given in IEC 62873-2 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
clamping unit

part of the terminal necessary for mechanical clamping and electrical connection of the

conductors including parts necessary to ensure correct contact pressure
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IEC 62873-3-1:2020 © IEC 2020 – 7 –
3.2
universal terminal

terminal for the connection and disconnection of all types of conductors (rigid and flexible)

Note 1 to entry: In the following countries, only universal screwless-type terminals are accepted: AT, BE, CN, DK,

DE, ES, FR, IT, PT, SE and CH.
3.3
non-universal terminal

terminal for the connection and disconnection of a certain kind of conductor only (e.g.

rigid-solid conductors only or rigid-[solid or stranded] conductors on
...

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