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.
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 1 0 mm 2 .
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 1 6 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
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 only)
3.4 push-wire terminal
non-universal terminal (see 3.3) in which the connection is made by pushing in rigid (solid or stranded) conductors
unprepared conductor conductor which has been cut and the insulation of which has been removed for insertion into a terminal
Note 1 to entry: A conductor the shape of which is arranged for introduction into a terminal or the strands of which are twisted to consolidate the end is considered as an unprepared conductor.
[SOURCE: IEC 60050-442:1 998, 442-01 -26]
3.6 low-current terminal
terminal intended to connect a conductor to a device capable of supplying a voltage signal and/or a current not exceeding 300 mA to the device
Note 1 to entry: This does not apply to special terminal constructions intended to connect to flat or other multiwire cables by performing one “clamping action” only for more than one wire (e.g. bus connections).
Clause 4 of the product standard, in which this document is referred to, applies.
5 Characteristics of devices
Clause 5 of the product standard, in which this document is referred to, applies.
6 Marking and other product information
In addition to Clause 6 of the product standard, in which this document is referred to, the
following markings apply:
– no marking.
– terminals declared for rigid-solid conductors shall be marked with the letters “sol”;
– terminals declared for rigid (solid and stranded) conductors shall be marked with the letter “r”;IEC 62873-3-1 pdf download.