EN IEC 60335-2-66:2026
(Main)Household and similar electrical appliances - Safety - Part 2-66: Particular requirements for water-bed heaters
General Information
- Abstract
This European Standard deals with the safety of electric water-bed heaters and their associated control units, for household and similar purposes, their rated voltage being not more than 250 V, including direct current (DC) supplied appliances.
- Status
- Not Published
- Publication Date
- 13-Aug-2026
- Technical Committee
- CLC/TC 61 - Safety of household and similar electrical appliances
- Drafting Committee
- CLC/TC 61 - Safety of household and similar electrical appliances
- Current Stage
- 5060 - Voting results sent to TC, SR - Formal Approval
- Start Date
- 19-Jun-2026
- Due Date
- 04-Aug-2027
- Completion Date
- 19-Jun-2026
Overview
EN IEC 60335-2-66:2026 is a European standard developed by the European Committee for Electrotechnical Standardization (CLC). It specifies the particular safety requirements for electric water-bed heaters and their associated control units used in household and similar applications. This standard applies to appliances with a rated voltage of not more than 250 V, including those supplied by direct current (DC).
By addressing the unique safety risks posed by water-bed heaters, this standard ensures users are protected from potential hazards such as electrical shock, fire, and mechanical failure. It is intended for manufacturers, suppliers, conformity assessment bodies, and regulatory authorities involved in the design, production, or approval of water-bed heaters in both residential and hospitality settings.
Key Topics
EN IEC 60335-2-66:2026 covers a comprehensive range of safety aspects for water-bed heaters:
Scope and Application
Defines which electric water-bed heaters and control units fall under the standard, with explicit exclusions for appliances intended for medical use or those meant for immersion during use.Construction and Design Requirements
Specifies requirements for the safe construction of water-bed heaters, including protection against access to live parts, resistance to heat, fire, moisture, and mechanical stress.Testing and Performance
Outlines test conditions, temperature limits for surfaces, mechanical endurance, and requirements for normal and abnormal operation, ensuring product reliability during expected use.Marking and Instructions
Describes mandatory labeling (e.g., voltage, correct usage, placement), installation instructions, and user guidance to promote safe deployment and operation.Electrical Requirements
Includes clear criteria for insulation, leakage currents, moisture resistance, overcurrent protection, and appropriate use of materials in internal wiring.Control Units and Safety Devices
Defines requirements for detachable control units, ensuring compatibility, clear identification, and safe integration with the heater.Additional Considerations
Relevant notes on compatibility with national health, labor, water supply, or safety regulations in specific regions or use cases such as hotels.
Applications
The practical applications of EN IEC 60335-2-66:2026 extend across several domains where electric water-bed heaters are used:
Residential Use
Guarantees the safety of water-bed heaters in private homes, ensuring reliable operation and reduced risk of injury or property damage.Hospitality Industry
Applies to water-bed heaters in hotels and similar public settings, providing a basis for compliance and guest safety.Product Manufacturing and Certification
Used by manufacturers for product development, testing, and certification to demonstrate conformity with European and international safety requirements.Import and Market Access
Serves as a recognized reference for regulatory authorities and buyers, facilitating market access within the EU by aligning with harmonized safety standards.Consumer Guidance
Informs end-users through clear instructions and markings, empowering safe installation and use of water-bed heaters.
Related Standards
Several standards are closely linked to EN IEC 60335-2-66:2026:
- IEC 60335-1: General requirements for the safety of household and similar electrical appliances. Part 2-66 supplements or modifies the provisions in Part 1 for water-bed heaters.
- ISO 2439: For testing hardness of flexible polymeric materials, referenced in test methods for bedding materials used with water-bed heaters.
- IEC 60601 Series: Covers medical electrical equipment, explicitly excluded from the scope of this standard.
- CISPR 11, CISPR 14-1, CISPR 14-2: Standards on electromagnetic compatibility, relevant for emissions and immunity aspects.
- IEC 60364: Wiring rules referenced for compatibility with national electrical installations.
These related standards provide a comprehensive framework for the safe design, production, and use of household electrical appliances, helping ensure water-bed heaters meet strict safety expectations in European and international markets.
Relations
- Effective Date
- 09-Feb-2026
- Effective Date
- 07-Apr-2025
- Effective Date
- 01-Apr-2025
- Effective Date
- 01-Apr-2025
- Effective Date
- 01-Apr-2025
- Effective Date
- 01-Apr-2025
Frequently Asked Questions
EN IEC 60335-2-66:2026 is a draft published by CLC. Its full title is "Household and similar electrical appliances - Safety - Part 2-66: Particular requirements for water-bed heaters". This standard covers: This European Standard deals with the safety of electric water-bed heaters and their associated control units, for household and similar purposes, their rated voltage being not more than 250 V, including direct current (DC) supplied appliances.
This European Standard deals with the safety of electric water-bed heaters and their associated control units, for household and similar purposes, their rated voltage being not more than 250 V, including direct current (DC) supplied appliances.
EN IEC 60335-2-66:2026 is classified under the following ICS (International Classification for Standards) categories: 97.100.10 - Electric heaters. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 60335-2-66:2026 has the following relationships with other standards: It is inter standard links to EN ISO 2439:2008, EN IEC 60335-2-66:2026/A11:2026, EN 60335-2-66:2003, EN 60335-2-66:2003/A1:2008, EN 60335-2-66:2003/A2:2012, EN 60335-2-66:2003/A11:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 60335-2-66:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60335-2-66:2026
01-januar-2026
Gospodinjski in podobni električni aparati - Varnost - 2-66. del: Posebne zahteve
za grelnike vodnih postelj
Household and similar electrical appliances - Safety - Part 2-66: Particular requirements
for water-bed heaters
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-66:
Besondere Anforderungen für Wasserbett-Beheizungen
Appareils électrodomestiques et analogues - Sécurité - Partie 2-66: Exigences
particulières pour les dispositifs de chauffage pour matelas à eau
Ta slovenski standard je istoveten z: prEN IEC 60335-2-66:2025
ICS:
13.120 Varnost na domu Domestic safety
97.030 Električni aparati za dom na Domestic electrical
splošno appliances in general
oSIST prEN IEC 60335-2-66:2026 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN IEC 60335-2-66:2026
oSIST prEN IEC 60335-2-66:2026
EUROPEAN STANDARD DRAFT
prEN IEC 60335-2-66
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 97.100.10 Will supersede EN 60335-2-66:2003; EN 60335-2-
66:2003/A1:2008; EN 60335-2-66:2003/A2:2012; EN
60335-2-66:2003/A11:2019
English Version
Household and similar electrical appliances - Safety - Part 2-66:
Particular requirements for water-bed heaters
(IEC 60335-2-66:2025)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-66: Exigences particulières pour les dispositifs de ähnliche Zwecke - Teil 2-66: Besondere Anforderungen für
chauffage pour matelas à eau Wasserbett-Beheizungen
(IEC 60335-2-66:2025) (IEC 60335-2-66:2025)
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2026-02-13.
The text of this draft consists of the text of IEC 60335-2-66:2025.
If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 81644 Ref. No. prEN IEC 60335-2-66:2025 E
oSIST prEN IEC 60335-2-66:2026
prEN IEC 60335-2-66:2025 (E)
European foreword
This document (FprEN IEC 60335-2-66:2025) consists of the text of document IEC 60335-2-66:2025,
prepared by IEC/TC 61 "Safety of household and similar electrical appliances".
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this document (doa) dav + 6 months
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 + 36 months
conflicting with this document have to be withdrawn (to be confirmed or
modified when voting)
This document will supersede EN 60335-2-66:2003 and all of its amendments and corrigenda (if any).
This document is read in conjunction with prEN IEC 60335-2-66:2025/prAA:2025.
Sensitivity: Internal / Non-Personal Data
oSIST prEN IEC 60335-2-66:2026
IEC 60335-2-66 ®
Edition 3.0 2025-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-66: Particular requirements for water-bed heaters
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-66: Exigences particulières pour les dispositifs de chauffage pour
matelas à eau
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.100.10 ISBN 978-2-8327-0233-8
oSIST prEN IEC 60335-2-66:2026
– 2 – IEC 60335-2-66:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirement . 7
5 General conditions for the tests . 7
6 Classification . 8
7 Marking and instructions . 8
8 Protection against access to live parts . 9
9 Starting of motor-operated appliances . 9
10 Power input and current . 9
11 Heating . 9
12 Charging of metal-ion batteries . 10
13 Leakage current and electric strength at operating temperature . 10
14 Transient overvoltages . 10
15 Moisture resistance . 10
16 Leakage current and electric strength . 10
17 Overload protection of transformers and associated circuits . 11
18 Endurance . 11
19 Abnormal operation . 11
20 Stability and mechanical hazards . 11
21 Mechanical strength . 11
22 Construction . 12
23 Internal wiring . 12
24 Components . 12
25 Supply connection and external flexible cords . 13
26 Terminals for external conductors . 13
27 Provision for earthing . 13
28 Screws and connections . 14
29 Clearances, creepage distances and solid insulation . 14
30 Resistance to heat and fire . 14
31 Resistance to rusting . 14
32 Radiation, toxicity and similar hazards . 14
Annexes . 16
Bibliography . 17
Figure 101 – Wood block . 15
Table 12 – Pull force and torque . 13
oSIST prEN IEC 60335-2-66:2026
IEC 60335-2-66:2025 © IEC 2025 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-66: Particular requirements for water-bed heaters
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, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely 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
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60335-2-66 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This third edition cancels and replaces the second edition published in 2002, Amendment 1:
2008 and Amendment 2:2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 60335-1:2020;
b) conversion of some notes to normative text (Clause 1, 19.4, 22.101);
c) clarification of requirements for remote operation (22.40, 22.49, 22.51).
oSIST prEN IEC 60335-2-66:2026
– 4 – IEC 60335-2-66:2025 © IEC 2025
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7249/CDV 61/7356/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts of the IEC 60335 series, under the general title: Household and similar
electrical appliances – Safety, can be found on the IEC website.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments unless that edition precludes it; in that case, the latest edition that does not
preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.
NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert
that publication into the IEC standard: Particular requirements for water-bed heaters.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as
far as is reasonable. When this standard states "addition", "modification" or "replacement", the
relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations can need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
oSIST prEN IEC 60335-2-66:2026
IEC 60335-2-66:2025 © IEC 2025 – 5 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
Guidance documents concerning the application of the safety requirements for appliances can
be accessed via TC 61 supporting documents on the IEC website.
https://www.iec.ch/tc61/supportingdocuments
This information is given for the convenience of users of this International Standard and does
not constitute a replacement for the normative text in this standard.
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