EN 60335-2-35:2016/A2:2021

Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters

This European Standard deals with the safety of electric instantaneous water heaters for household and similar purposes and intended for heating water below boiling temperature, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances

Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-35: Besondere Anforderungen für Durchflusserwärmer

Appareils électrodomestiques et analogues - Sécurité - Partie 2-35: Exigences particulières pour les chauffe-eau instantanés

Gospodinjski in podobni električni aparati - Varnost - 2-35. del: Posebne zahteve za pretočne grelnike vode - Dopolnilo A2

General Information

• Status: Published
• Publication Date: 30-Sep-2021
• ICS: 13.120 - Domestic safety
• ICS: 97.040.50 - Small kitchen appliances
• Technical Committee: CLC/TC 61 - Safety of household and similar electrical appliances
• Drafting Committee: CLC/TC 61/WG 01 - Relation with standardization and legislation
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 01-Oct-2021
• Due Date: 28-Feb-2023
• Completion Date: 01-Oct-2021
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN 60335-2-35:2016/A2:2021 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters

Relations

• Amends: EN 60335-2-35:2016 - Household and similar electrical appliances - Safety - Part 2-35: Particular requirements for instantaneous water heaters
• Effective Date: 26-Jan-2023

Overview

EN 60335-2-35:2016/A2:2021 is a European harmonized safety standard for instantaneous (flow) electric water heaters used in household and similar applications. It is the CENELEC adoption of IEC 60335-2-35:2012/A2:2020 (modified) and supplements EN 60335‑1 (Part 1). The standard covers safety requirements for appliances that heat water below boiling temperature and have rated voltages up to 250 V for single‑phase and 480 V for other appliances. Amendment A2 (2021) adds specific test methods and limits, notably for surface temperature measurements.

Key topics and technical requirements

• Scope and application
  • Applies to electric instantaneous water heaters for household and similar use, heating water below boiling point.
  • Voltage limits explicitly defined: ≤250 V (single‑phase) and ≤480 V (other).
• Heating and surface temperature controls (amendment A2)
  • Defines a surface temperature probe (Figure 104) and measurement procedure: probe applied with a force of 4 N ± 1 N, contact time 30 s, and continuous monitoring during tests.
  • Probe construction details include Type K thermocouples, a polycarbonate tube, and a 5 mm tinned copper disc contact.
  • Maximum allowable temperature rises for specified external accessible surfaces under normal operation (Table 101):
    • Bare metal: 42 K
    • Coated metal: 49 K
    • Glass and ceramic: 56 K
    • Plastic and plastic coating > 0.4 mm: 62 K
  • Temperature-rise limits for knobs, grips and similar parts are referenced to Table 3.
• Harmonization and conformity
  • Amendment A2 aligns the European text with IEC changes and contains normative references and Annexes (ZZA/ZC) linking the standard to the Low Voltage Directive (2014/35/EU) and other EN/HD documents.

Practical applications

• Use this standard for:
  • Design and engineering of safe instantaneous electric water heaters (product safety, material selection, thermal protection).
  • Type and routine testing in laboratories to verify surface temperature limits and heating behaviour.
  • Certification and conformity assessment to support CE marking and presumption of conformity with the Low Voltage Directive when the standard is cited in the Official Journal.
  • Risk assessment and technical documentation for manufacturers and compliance officers.

Who uses this standard

• Manufacturers and product designers of instantaneous water heaters
• Test laboratories and notified bodies performing safety verification
• Compliance engineers and regulatory agencies
• Component suppliers (heating elements, controls, enclosures) ensuring part-level compliance

Related standards

• EN 60335-1 (Household appliances - General requirements)
• EN 60335-2-5 (Particular requirements for dishwashers) - referenced in Annex ZC
• IEC 60335-2-35 (base international publication)

Keywords: EN 60335-2-35:2016/A2:2021, instantaneous water heaters, electric flow water heater safety, surface temperature limits, Low Voltage Directive, electrical appliance testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2021
Gospodinjski in podobni električni aparati - Varnost - 2-35. del: Posebne zahteve
za pretočne grelnike vode - Dopolnilo A2
Household and similar electrical appliances - Safety - Part 2-35: Particular requirements
for instantaneous water heaters
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-35:
Besondere Anforderungen für Durchflusserwärmer
Appareils électrodomestiques et analogues - Sécurité - Partie 2-35: Exigences
particulières pour les chauffe-eau instantanés
Ta slovenski standard je istoveten z: EN 60335-2-35:2016/A2:2021
ICS:
13.120 Varnost na domu Domestic safety
91.140.65 Oprema za ogrevanje vode Water heating equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60335-2-35:2016/A2

NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2021
ICS 13.120; 97.040.50
English Version
Household and similar electrical appliances - Safety - Part 2-35:
Particular requirements for instantaneous water heaters
(IEC 60335-2-35:2012/A2:2020 , modified)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-35: Exigences particulières pour les chauffe-eau ähnliche Zwecke - Teil 2-35: Besondere Anforderungen für
instantanés Durchflusserwärmer
(IEC 60335-2-35:2012/A2:2020 , modifiée) (IEC 60335-2-35:2012/A2:2020 , modifiziert)
This amendment A2 modifies the European Standard EN 60335-2-35:2016; it was approved by CENELEC on 2021-05-10. 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.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists 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,
Turkey and the United Kingdom.

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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60335-2-35:2016/A2:2021 E

European foreword
This document EN 60335-2-35:2016/A2:2021 consists of the text of IEC 60335-2-35:2012/A2:2020
prepared by IEC/TC 61 “Safety of household and similar electrical appliances”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2021-11-27
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2024-08-27
with this document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
For the relationship with EU Directive(s) see informative Annex ZZA, which is an integral part of this
document.
Endorsement notice
The text of the IEC 60335-2-35:2012/A2:2020 was approved by CENELEC as a European
Standard with agreed common modifications.

1 Modification to Introduction
Addition:
This European amendment A2 supplements or modifies the corresponding clauses of the standards
below:
— EN 60335-1:2012+A11:2014+ A13:2017+A1:2019+A14:2019+A2:2019 (Part 1)
— EN 60335-2-35:2012+A1:2019(Part 2)
2 Modification to Annexes
Annex ZC
(normative)
Normative references to international publications
with their corresponding European publications:
The Annex ZC of part 1 is applicable except as follows:
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Replace the normative reference of Part 2 with the following:
Publication Year Title EN/HD Year
IEC 60335-2-5 2012 Household and similar electrical EN 60335-2-5 2015
appliances – Safety – Part 2–5: Particular
+A11 2019
requirements for dishwashers
Annex ZZA
(informative)
Relationship between this European Standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered
Replace the Annex ZZA in part 2 by the following:
This European Standard has been prepared under a Commission’s standardization request relating to
harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Offic
...