kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026

• Abstract:

  IEC 61008-1:2024, Clause 1 is applicable except for the first paragraph, which is replaced by; the first paragraph below, and the last paragraph, which is replaced by the second paragraph; below:; This part of IEC 61008 applies to residual current operated circuit-breakers, without integral; overcurrent protection, for household and similar uses (hereafter referred to as RCCBs),; classified according to IEC 61008-1:2024, 4.1.1. RCCBs according to this document are; intended for voltages not exceeding 440 V AC with frequencies of 50 Hz, 60 Hz or 50/60 Hz; and currents not exceeding 125 A, intended principally for protection against shock hazard.; This document applies in conjunction with IEC 61008-1:2024. It specifies requirements, tests; and test sequences to verify compliance and is used for certification purposes.

• Status: Not Published
• Public Enquiry End Date: 27-Feb-2026
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: EPR - Electrical accessories
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 27-Oct-2026
• Due Date: 15-Dec-2026
• Ref Project: FprEN IEC 61008-2-1:2026/FprAA:2026 - Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) - Part 2-1: RCCBs according to classification 4.1.1

• Amends: oSIST prEN IEC 61008-2-1:2026 - Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) - Part 2-1: RCCBs according to classification 4.1.1 (IEC 61008-2-1:2024)
• Effective Date: 22-Jul-2025

kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 is the Slovenian standard identical to the CENELEC draft amendment prEN IEC 61008-2-1:2026/prAA:2026 for residual current operated circuit-breakers without integral overcurrent protection (RCCBs). It applies to RCCBs for household and similar uses, adds test requirements and test sequences for certification, and introduces a low ambient air temperature verification for RCCBs classified according to IEC 61008-1:2024, 4.1.1.

What does kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 specify?

kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 specifies the extra requirements, tests and test sequences for RCCBs covered by IEC 61008-1:2024, with the first and last paragraphs of Clause 1 replaced for this part. The document is used together with IEC 61008-1:2024 and is intended for certification purposes.

The scope is limited to RCCBs without integral overcurrent protection for household and similar uses, classified according to IEC 61008-1:2024, 4.1.1. The rated use conditions stated here are voltages not exceeding 440 V AC, frequencies of 50 Hz, 60 Hz or 50/60 Hz, and currents not exceeding 125 A, with protection primarily against shock hazard.

The document is organized as a set of amendments to the test clauses and annexes of the base standard. It modifies Clause 9, Figure 2 and Annex A, and adds Annex ZA and Annex ZB.

What are the key requirements of kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026?

The main technical change in kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 is the new low-temperature verification in 9.Z1. In practice, this means manufacturers and test labs must show that RCCBs still operate correctly after repeated exposure to low ambient air temperatures and humidity cycling.

Low ambient air temperature test in 9.Z1

Clause 9.Z1 applies to RCCBs intended for use between −25 °C and +40 °C. Enclosed-type RCCBs are tested in their enclosure, while unenclosed-type RCCBs are mounted in an individual IP55 enclosure and connected as in normal use.

The test cycle in Figure Z6 keeps the device in an ON state without load, moves it through temperature and humidity stages, and repeats the cycle five times. During the cycles, the RCCB shall not trip. After the fifth cycle, the document requires a residual current operating test at the low-temperature point, with different conditions for general type, type S and type A devices.

The result matters because it checks both operating behaviour and mechanical integrity after climate stress. After the test, a visual inspection is required, and the RCCB must still be able to switch on at −25 °C without residual current present.

Test circuit, operating characteristics and trip-free mechanism

Figure 2 is modified so that it also covers behaviour at low ambient air temperature for RCCBs classified according to 4.1.1. This is the circuit reference for the operating-characteristics and trip-free-mechanism checks, so test laboratories use the updated figure when setting up verification.

Test sequences and sample numbers in Annex A

Annex A is updated in several places. Table A.1 adds sequence G0 for climatic reliability and G1 for the new low-temperature verification, while Clause A.2 and Tables A.2 to A.4 adjust how many samples are needed for full and simplified test procedures.

For users, this affects certification planning directly. It changes how many RCCBs must be submitted, which tests are run on which samples, and how the test program is arranged for different pole counts and classifications.

National conditions in Annex ZB

Annex ZB gives special national conditions. It records that in Germany the use of RCCBs of type AC is not permitted, and it also keeps specific United Kingdom notes for Tables A.3 and A.4.

What terms does kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 define?

• RCCB - residual current operated circuit-breaker without integral overcurrent protection, used to disconnect when residual current indicates a fault or shock hazard.
• IΔn - rated residual operating current, the reference residual current used in the test conditions and device classification.
• Type A - an RCCB tested here with AC residual currents and pulsating DC residual currents.
• Type S - a selective RCCB that is tested with delayed operating conditions referenced in this document.
• IP55 - the degree of protection used for the enclosure around unenclosed-type RCCBs during the low-temperature test.
• Trip-free mechanism - the mechanism that must operate correctly under the test conditions and not be held closed against a tripping condition.

Who uses kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026?

kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 is used by RCCB manufacturers, electrical test laboratories, certification bodies, and quality or compliance teams working on household and similar low-voltage protective devices. It is also relevant to buyers and engineers who need to specify or verify certification test coverage for RCCBs classified under IEC 61008-1:2024, 4.1.1.

In practice, these users apply it for design validation, type testing, sample planning, and conformity assessment before market release.

What changed in kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 from the previous edition?

Compared with prEN IEC 61008-2-1:2026, this draft amendment introduces these changes:

• it deletes the last paragraph of 9.9.1.1, “Test circuit and test procedure”
• it deletes the third paragraph of 9.15.1, “General test conditions”
• it adds 9.Z1 for verification of correct operation at low ambient air temperatures
• it modifies Figure 2 to include low-temperature behaviour
• it adds Figure Z6 for the low-temperature test cycle
• it revises Tables A.1, A.2, A.3 and A.4 for test sequences and sample numbers
• it adds Annex ZA and Annex ZB

The foreword also states that only the essential common changes existing in EN 61008-2-1:1994 and its amendments and corrigenda are maintained.

Which standards are used with kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026?

• IEC 61008-1:2024 - the base standard that provides the general rules and is applied together with this part.
• IEC 61543:2022 - the electromagnetic compatibility reference for residual current-operated protective devices.
• IEC 62873-2 - the vocabulary reference for residual current operated circuit-breakers and related terms.

Annex ZA maps these international publications to their corresponding European publications, including prEN IEC 61008-1:2026 and EN IEC 61543:2023 + A11:2023.

What does the kSIST FprEN IEC 61008-2-1:2026/kFprAA:2026 document contain?

The document contains the modified test clauses in Clause 9, including the new low-temperature verification in 9.Z1. It also contains the updated Figure 2 and the new Figure Z6, which support the test setup and temperature cycle.

Annex A contains the revised test sequences and sample quantities for full and simplified test procedures, including the new G0 and G1 sequences. Annex ZA lists the normative references, and Annex ZB records the special national conditions for Germany and the United Kingdom.

For certification work, the document is therefore a test-oriented amendment: it tells users what to test, how to set up the test, and how many samples are needed for the relevant sequences.

SLOVENSKI STANDARD
oSIST prEN IEC 61008-2-1:2026/oprAA:2026
01-februar-2026
Odklopniki na preostali (residualni) tok brez vgrajene nadtokovne zaščite za
gospodinjsko in podobno rabo (RCCB's) - 2-1. del: Odklopniki na preostali
(residualni) tok brez vgrajene nadtokovne zaščite v skladu s klasifikacijo 4.1.1
Residual current operated circuit-breakers without integral overcurrent protection for
household and similar uses (RCCBs) - Part 2-1: RCCBs according to classification 4.1.1
Fehlerstrom-/Differenzstrom-Schutzschalter ohne eingebauten Überstromschutz für
Hausinstallationen und für ähnliche Anwendungen (RCCBs) - Teil 2-1: RCCBs nach
Klassifikation 4.1.1
Interrupteurs automatiques à courant différentiel résiduel sans dispositif de protection
contre les surintensités incorporé pour usages domestiques et analogiques (ID) - Partie
2-1: ID conformes à la classification en 4.1.1
Ta slovenski standard je istoveten z: prEN IEC 61008-2-1:2026/prAA:2026
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
oSIST prEN IEC 61008-2- en
1:2026/oprAA:2026
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61008-2-1:2026/oprAA:2026

oSIST prEN IEC 61008-2-1:2026/oprAA:2026
EUROPEAN STANDARD DRAFT
prEN IEC 61008-2-1:2026
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
January 2026
ICS 29.120.50 -
English Version
Residual current operated circuit-breakers without integral
overcurrent protection for household and similar uses (RCCBs) -
Part 2-1: RCCBs according to classification 4.1.1
Interrupteurs automatiques à courant différentiel résiduel Fehlerstrom-/Differenzstrom-Schutzschalter ohne
sans dispositif de protection contre les surintensités eingebauten Überstromschutz für Hausinstallationen und
incorporé pour usages domestiques et analogiques (ID) - für ähnliche Anwendungen (RCCBs) - Teil 2-1: RCCBs
Partie 2-1: ID conformes à la classification en 4.1.1 nach Klassifikation 4.1.1
This draft amendment prAA, if approved, will modify the European Standard prEN IEC 61008-2-1:2026; it is submitted to CENELEC
members for enquiry.
Deadline for CENELEC: 2026-04-24.
It has been drawn up by CLC/TC 23E.
If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
This draft amendment was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 82332 Ref. No. prEN IEC 61008-2-1:2026/prAA:2026 E

oSIST prEN IEC 61008-2-1:2026/oprAA:2026
prEN IEC 61008-2-1:2026/prAA:2026 (E)
Contents Page
European foreword . 3
1 Modification to 9.9.1.1, “Test circuit and test procedure” . 4
2 Modification to 9.15.1, “General test conditions” . 4
3 Addition of 9.Z1, “Verification of the correct operation at low ambient air temperatures for
RCCBs for use at temperatures between −25 °C and +40 °C” . 4
4 Modification to Figure 2, “Test circuit for the verification of operating characteristics, and
trip-free mechanism for RCCBs classified according to 4.1.1” . 5
5 Addition of Figure Z6, “Test cycle for low temperature test (9.Z1)”. 5
6 Modification to Table A.1, “Test sequences” . 5
7 Modification to Clause A.2, “Number of samples to be submitted for full test procedure” . 5
8 Modifications to Table A.2, “Number of samples for full test procedure” . 5
9 Modifications to Table A.3, “Number of samples for simplified test procedure” . 6
10 Modifications to Table A.4, “Test sequences for RCCBs of different classification
according to 4.3 of IEC 61008-1:2024” . 6
11 Addition of Annex ZA, “Normative references to international publications with their
corresponding European publications” . 6
12 Addition of Annex ZB, “Special National Conditions” . 7
oSIST prEN IEC 61008-2-1:2026/oprAA:2026
prEN IEC 61008-2-1:2026/prAA:2026 (E)

European foreword
This document (prEN IEC 61008-2-1:2026/prAA:2026) has been prepared by CLC/TC 23E “Circuit breakers
and similar devices for household and similar applications”.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 60 months (to
conflicting with this document have to be be confirmed or
withdrawn modified when voting)
This document is read in conjunction with prEN IEC 61008-2-1:2026.
This document includes the following significant technical modifications with respect to prEN
IEC 61008-2-1:2026:
— Only the essential common changes existing in EN 61008-2-1:1994 and all of its amendments and
corrigenda (if any) are maintained in this document.
oSIST prEN IEC 61008-2-1:2026/oprAA:2026
prEN IEC 61008-2-1:2026/prAA:2026 (E)
1 Modification to 9.9.1.1, “Test circuit and test procedure”
Delete the last paragraph.
2 Modification to 9.15.1, “General test conditions”
Delete the 3rd paragraph.
3 Addition of 9.Z1, “Verification of the correct operation at low ambient air
temperatures for RCCBs for use at temperatures between −25 °C and +40 °C”
Add the following subclause:
“9.Z1 Verification of the correct operation at low ambient air temperatures for RCCBs for use at
temperatures between −25 °C and +40 °C
Enclosed-type RCCBs are tested in their enclosure, unenclosed-type RCCBs are mounted in an individual
enclosure with a degree of protection IP55, and are connected as for normal use (see Figure 2).
No drain hole in the enclosure shall be opened for this test.
NOTE RCCBs tested in enclosures IP55
...