SIST EN IEC 60335-2-111:2026

• Abstract:

  This European Standard deals with the safety of electric ondol-mattresses for household and similar purposes, their rated voltage being not more than 250 V including direct current (DC) supplied appliances and battery-operated appliances. This standard also applies to control units supplied with the appliance

• Status: Published
• Public Enquiry End Date: 30-Jan-2026
• Publication Date: 22-Sep-2026
• ICS: 13.120 - Domestic safety
• ICS: 97.030 - Domestic electrical appliances in general
• ICS: 97.100.10 - Electric heaters
• ICS: 97.140 - Furniture
• Technical Committee: VGA - Safety of household and similar electrical appliances
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Sep-2026
• Due Date: 15-Nov-2026
• Completion Date: 23-Sep-2026
• Ref Project: EN IEC 60335-2-111:2026 - Household and similar electrical appliances - Safety - Part 2-111: Particular requirements for electric ondol-mattress with a non-flexible heated part

• Replaces: SIST EN IEC 60335-2-111:2020 - Household and similar electrical appliances - Safety - Part 2-111: Particular requirements for electric ondol mattress with a non-flexible heated part
• Effective Date: 01-Nov-2026
• Refers: SIST EN ISO 2439:2009 - Flexible cellular polymeric materials - Determination of hardness (indentation technique) (ISO 2439:2008)
• Effective Date: 09-Feb-2026
• Referred By: SIST EN 12976-1:2022 - Thermal solar systems and components - Factory made systems - Part 1: General requirements
• Effective Date: 08-Sep-2026
• Referred By: SIST EN 12976-1:2017 - Thermal solar systems and components - Factory made systems - Part 1: General requirements
• Effective Date: 08-Sep-2026
• Amended By: SIST EN IEC 60335-2-111:2026/A11:2026 - Household and similar electrical appliances - Safety - Part 2-111: Particular requirements for electric ondol mattress with a non-flexible heated part
• Effective Date: 01-Nov-2026

SIST EN IEC 60335-2-111:2026 is a CENELEC European Standard for the safety of electric ondol-mattresses with a non-flexible heated part. It applies to household and similar appliances up to 250 V, including direct current (DC) supplied and battery-operated appliances, and also covers control units supplied with the appliance. In practice, it is the product-family safety standard manufacturers, test laboratories, and compliance teams use to check design, marking, instructions, insulation, heating performance, and abnormal-operation protection.

What does SIST EN IEC 60335-2-111:2026 specify?

SIST EN IEC 60335-2-111:2026 specifies particular safety requirements for electric ondol-mattresses for household and similar use. It supplements the general safety rules of Part 1 for this specific product type, so readers should use it as the appliance-specific layer of requirements.

The scope includes appliances intended for household and similar purposes, including products used where the public may be exposed, such as community spas or cold ambient locations. It excludes industrial-only appliances and several other heating product families, including flexible blankets and pads, room heaters, water-bed heaters, animal heating appliances, foot warmers and heating mats, flexible sheet heating elements for room heating, heated carpets under removable floor coverings, and appliances intended for medical supervision.

The document is organized into Clauses 1 to 32, plus two normative annexes and two figures. The annexes each cover a different topic:

Annex	What it covers
Annex B	Battery-operated appliances, separable batteries, and detachable batteries for battery-operated appliances
Annex AA	Specification for thermal insulation

Figures 101 and 102 show the test arrangements used for leakage current, electric strength, and thermal insulation positioning.

What are the key requirements of SIST EN IEC 60335-2-111:2026?

SIST EN IEC 60335-2-111:2026 focuses on hazards that matter most for heated bedding-type appliances: overheating, electric shock, moisture, mechanical damage, and unsafe controls. The most important requirements are spread across the marking, heating, leakage current, moisture, abnormal operation, construction, and component clauses.

• Marking and instructions (Clause 7) - Appliances shall carry the rated power input, a read-the-instructions warning, and a warning against use with a helpless person, an infant, or a person insensitive to heat. If the appliance uses a detachable control unit or transformer, the matching reference has to be identified. In practice, this helps prevent unsafe pairing and misuse.

• Access to live parts (Clause 8) - The standard adds test probe 19 wherever test probe 18 is used. That means the enclosure and accessible openings are checked with an additional probe condition, which matters for exposed controls and connectors.

• Heating and surface temperature (Clause 11) - The ondol-mattress is tested with the separate control unit placed away from the appliance, and temperatures are measured using copper or brass plates at several locations. The surface temperature limit is 56 °C, and another test checks that the appliance can be operated without risk of heatstroke, with a 37 °C limit at the specified measurement point. This is central for user safety because it controls burn and overheating risk during normal use.

• Leakage current and electric strength (Clauses 13 and 16) - The tests use a metal foil arrangement over the heated area with a uniformly distributed load and the thermal insulation sheet in place. The leakage current limits are specified for the heating part, and the dielectric test is applied between live parts and the foil. In practice, this checks that the heated structure still provides acceptable insulation in a realistic loaded condition.

• Moisture resistance (Clause 15) - A defined spillage test is applied, followed by electric strength testing and inspection for water on insulation. This matters because bed-like heating products can be exposed to liquids in everyday use.

• Abnormal operation and component failure (Clause 19) - The standard replaces the Part 1 abnormal-operation tests with tests that cover partial thermal insulation coverage and control failures. The surface temperature shall not exceed 80 °C in the specified condition, and component failures must not create hazardous temperatures. A non-self-resetting thermal cut-out is required where the temperature exceeds the permitted limit. This requirement is important because faults must not create a burn or fire hazard.

• Construction and components (Clauses 22 and 24) - Heating elements and internal wiring have to remain in their intended position, heating element crossings are not allowed, and the insulation of heating elements and internal wiring has to be integral with the conductors for non-class III construction. Thermostats and self-resetting thermal cut-outs are endurance-tested, and thermal cut-outs used for compliance with the abnormal-operation test shall not be self-resetting. These points shape the mechanical and electrical design of the product.

• Connection and mechanical strength (Clause 25, 21.101) - Flexible cords are pull-tested, and surface-mounted control units are drop-tested and loaded. That means the controls must survive handling and everyday knocks without creating a safety defect.

What terms does SIST EN IEC 60335-2-111:2026 define?

SIST EN IEC 60335-2-111:2026 defines the main product and part names used throughout the tests.

• ondol-mattress - An appliance with an ondol-plate that contains an embedded heating element and a bed frame that supports the plate.
• controlled appliance - An appliance that senses temperature changes during normal operation and automatically regulates the average power input.
• heating element - A heating conductor, such as a heating sheet or insulated wires.
• control unit - A device, inside or outside the bed frame, used to adjust or regulate the average power input.
• bed frame - The frame that supports the ondol-plate.
• normal operation - The test condition used for this product, with the ondol-mattress placed on the floor of the test corner, the bed-frame legs removed, a plywood base in place, and thermal insulation over the ondol-plate.
• thermal insulation - The specific sheet material defined for the test setup in Annex AA.

Who uses SIST EN IEC 60335-2-111:2026?

SIST EN IEC 60335-2-111:2026 is used by manufacturers of electric ondol-mattresses and their control units, especially teams responsible for electrical design, safety engineering, and product compliance. Test laboratories use it to set up leakage current, electric strength, heating, moisture, and abnormal-operation tests. Quality managers, certification bodies, and buyers use it to check whether a product family, marking set, and instruction set match the safety expectations for this appliance category.

What changed in SIST EN IEC 60335-2-111:2026 from the previous edition?

SIST EN IEC 60335-2-111:2026 supersedes EN IEC 60335-2-111:2019 and its amendments and corrigenda, if any. The European foreword states that it adopts the text of IEC 60335-2-111:2024 without modification.

The document also identifies these technical changes relative to the previous edition:

• alignment with IEC 60335-1:2020
• conversion of some notes to normative text in Clause 1
• introduction of test probe 19 in the places where test probe 18 is used

Which standards are used with SIST EN IEC 60335-2-111:2026?

SIST EN IEC 60335-2-111:2026 is used with the latest edition of IEC 60335-1, which provides the general safety requirements for household and similar electrical appliances. Annex B of Part 1 is applied with the additional probe 19 conditions for battery-operated appliances.

The standard also references ISO 2439 for measuring the hardness of the thermal insulation in Annex AA. IEC 61032 is used for the test probes, and the document is read in conjunction with SIST EN IEC 60335-2-111:2026/A11:2026.

What does the SIST EN IEC 60335-2-111:2026 document contain?

SIST EN IEC 60335-2-111:2026 contains the product-specific safety clauses for ondol-mattresses, starting with scope, references, and definitions, then moving through marking, protection against electric shock, heating, moisture, abnormal operation, construction, and component requirements. It includes test arrangements for leakage current and electric strength in Figure 101, and for thermal insulation positioning in Figure 102.

Annex B gives the battery-related adaptations needed when the appliance is battery-operated. Annex AA defines the thermal insulation used in the test setup, including its physical characteristics and the ISO 2439 hardness method. The bibliography points readers to related appliance safety standards for other heating products and to the medical-use standard that is outside this scope.

SLOVENSKI STANDARD
01-november-2026
Nadomešča:
SIST EN IEC 60335-2-111:2020
Gospodinjski in podobni električni aparati - Varnost - 2-111. del: Posebne zahteve
za grelne vzmetnice s togimi grelnimi elementi (IEC 60335-2-111:2024)
Household and similar electrical appliances - Safety - Part 2-111: Particular requirements
for electric ondol mattress with a non-flexible heated part (IEC 60335-2-111:2024)
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-111:
Besondere Anforderungen für elektrische Ondol-Matratzen mit einem nicht flexiblen
beheizten Teil (IEC 60335-2-111:2024)
Appareils électrodomestiques et analogues - Sécurité - Part 2-111: Exigences
particulières pour les matelas électriques ondol avec une partie chauffée non-flexible
(IEC 60335-2-111:2024)
Ta slovenski standard je istoveten z: EN IEC 60335-2-111:2026
ICS:
13.120 Varnost na domu Domestic safety
97.030 Električni aparati za dom na Domestic electrical
splošno appliances in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60335-2-111

NORME EUROPÉENNE
EUROPÄISCHE NORM September 2026
ICS 13.120; 97.100.10; 97.140 Supersedes EN IEC 60335-2-111:2019
English Version
Household and similar electrical appliances - Safety - Part 2-111:
Particular requirements for electric ondol-mattress with a non-
flexible heated part
(IEC 60335-2-111:2024)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-111: Exigences particulières pour les matelas ähnliche Zwecke - Teil 2-111: Besondere Anforderungen für
électriques ondol avec une partie chauffée non-flexible elektrische Ondol-Matratzen mit einem nicht flexiblen
(IEC 60335-2-111:2024) beheizten Teil
(IEC 60335-2-111:2024)
This European Standard was approved by CENELEC on 2026-07-27. 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.
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 European Standard 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,
Türkiye 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60335-2-111:2026 E

European foreword
This document (EN IEC 60335-2-111:2026) consists of the text of document IEC 60335-2-111:2024,
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) 2027-09-30
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards (dow) 2029-09-30
conflicting with this document have to be withdrawn
This document supersedes EN IEC 60335-2-111:2019 and all of its amendments and corrigenda (if
any).
This document is read in conjunction with EN IEC 60335-2-111:2026/A11:2026.
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60335-2-111:2024 was approved by CENELEC as a
European Standard without any modification.

IEC 60335-2-111 ®
Edition 2.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-111: Particular requirements for electric ondol mattress with a non-

flexible heated part
Appareils électrodomestiques et analogues – Sécurité –

Partie 2-111: Exigences particulières pour les matelas électriques ondol avec

une partie chauffée non flexible

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120, 97.100.10, 97.140 ISBN 978-2-8322-9752-0

– 2 – IEC 60335-2-111:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 General requirement . 10
5 General conditions for the tests . 10
6 Classification . 10
7 Marking and instructions . 10
8 Protection against access to live parts . 11
9 Starting of motor-operated appliances . 11
10 Power input and current . 11
11 Heating . 11
12 Charging of metal-ion batteries . 12
13 Leakage current and electric strength at operating temperature . 12
14 Transient overvoltages . 12
15 Moisture resistance . 13
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 14
21 Mechanical strength . 14
22 Construction . 15
23 Internal wiring . 15
24 Components . 16
25 Supply connection and external flexible cords . 16
26 Terminals for external conductors . 16
27 Provision for earthing . 16
28 Screws and connections . 16
29 Clearances, creepage distances and solid insulation . 17
30 Resistance to heat and fire . 17
31 Resistance to rusting . 17
32 Radiation, toxicity and similar hazards . 17
Annexes . 19
Annex B (normative) Battery-operated appliances, separable batteries and detachable
batteries for battery-operated appliances . 20
Annex AA (normative) Specification for thermal insulation . 21
Bibliography . 22

IEC 60335-2-111:2024 © IEC 2024 – 3 –
Figure 101 – Arrangement for measuring leakage current and electric strength of the
ondol-mattress . 18
Figure 102 – Positioning of the thermal insulation on an ondol-mattress incorporating

thermostats . 18

– 4 – IEC 60335-2-111:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-111: Particular requirements for electric ondol-mattress
with a non-flexible heated part

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,
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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
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misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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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 60335-2-111 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2015. 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);
c) application of test probe 19 has been introduced (8.1.1, 20.2, B.22.3, B.22.4).

IEC 60335-2-111:2024 © IEC 2024 – 5 –
The text of this International Standard is based on the following documents:
Draft Report on voting
61/7280/FDIS 61/7303/RVD
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: Safety requirements for electric ondol-mattress with a
non-flexible heated part.
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.

– 6 – IEC 60335-2-111:2024 © IEC 2024
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.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 12 months or later than 36 months from the date of publication.

IEC 60335-2-111:2024 © IEC 2024 – 7 –
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.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal
use taking into account the manufacturer's instructions. It also covers abnormal situations that
can be expected in practice and takes into account the way in which electromagnetic
phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that there
is compatibility with the wiring rules when the appliance is connected to the supply mains.
However, national wiring rules can differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with in
Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not
applicable since they have been taken into consideration when developing the general and particular requirements
for the IEC 60335 series of standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, i
...