IEC 60335-2-49:2002/AMD1:2008

Amendment 1 - Household and similar electrical appliances - Safety - Part 2-49: Particular requirements for commercial electric appliances for keeping food and crockery warm

Amendement 1 - Appareils électrodomestiques et analogues - Sécurité - Partie 2-49: Règles particulières pour les appareils électriques à usage collectif destinés à maintenir au chaud les aliments et la vaisselle

General Information

• Status: Published
• Publication Date: 24-Apr-2008
• ICS: 97.030 - Domestic electrical appliances in general
• Technical Committee: TC 61 - Safety of household and similar electrical appliances
• Current Stage: DELPUB - Deleted Publication
• Start Date: 03-Nov-2021
• Completion Date: 26-Oct-2025

Relations

• Amends: IEC 60335-2-49:2002 - Household and similar electrical appliances - Safety - Part 2-49: Particular requirements for commercial electric hot cupboards
• Effective Date: 05-Sep-2023
• Revised: IEC 60335-2-49:2021 - Household and similar electrical appliances - Safety - Part 2-49: Particular requirements for commercial electric appliances for keeping food and crockery warm
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60335-2-49
Edition 4.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Household and similar electrical appliances – Safety –
Part 2-49: Particular requirements for commercial electric appliances for keeping
food and crockery warm
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-49: Règles particulières pour les appareils électriques à usage collectif
destinés à maintenir au chaud les aliments et la vaisselle

IEC 60335-2-49 A1:2008
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IEC 60335-2-49
Edition 4.0 2008-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Household and similar electrical appliances – Safety –
Part 2-49: Particular requirements for commercial electric appliances for
keeping food and crockery warm

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-49: Règles particulières pour les appareils électriques à usage collectif
destinés à maintenir au chaud les aliments et la vaisselle

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 97.030 ISBN 2-8318-9727-0
– 2 – 60335-2-49 Amend. 1 © IEC:2008
FOREWORD
This amendment has been prepared by IEC subcommittee 61E: Safety of electrical
commercial catering equipment, of IEC technical committee 61: Safety of household and
similar electrical appliances.
The text of this amendment is based on the following documents:
FDIS Report on voting
61E/617/FDIS 61E/620/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may 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.
___________
Title
Replace the title by the following:
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-49: Particular requirements for commercial electric appliances
for keeping food and crockery warm

INTRODUCTION
Replace the second sentence of the second paragraph by the following:
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.

60335-2-49 Amend. 1 © IEC:2008 – 3 –
Replace the fifth paragraph by the following:
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 and generic standards 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. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
1 Scope
In the second paragraph, replace “hot cupboards” by “appliances for keeping food and
crockery warm”.
Replace the third paragraph by the following:
Examples of appliances that are within the scope of this standard are:
– hot cupboards, with or without heated tops;
– heated tops;
– heated display cases;
– heated crockery dispensers;
– heated tables;
– radiant heaters.
3 Definitions
3.1.9 Add the following:
Appliances incorporating induction heating sources are operated with the induction
crockery placed on induction trays. All tray supports are loaded, but partial up to full load
shall be possible.
All controls are set to maximum, and the induction crockery is half-filled with initially cold
water. Covers (cloches) are in their position.
The appliances consist of several units, which can form up to three separated modules; they
are connected together during operation. These units are the heating module with the
induction heating source, the rack with the coil carriers and the enclosure with the
supports for the induction trays including the induction crockery.
Add the following new definitions:
3.106
heated table
appliance designed for warm-holding on the surface

– 4 – 60335-2-49 Amend. 1 © IEC:2008
3.107
radiant heater
stationary appliance for keeping food and crockery warm by means of radiant heat
NOTE A part of the appliance can be swivelling.
3.108
heating unit
any part of an appliance that fulfils an independent cooking or heating function
3.109
induction heating source
heating source that operates by inducing eddy currents in induction crockery
3.110
coil carrier
insulation device containing the induction winding
3.111
induction crockery
crockery suitable to be heated by induction for heating up or keeping food warm
3.112
induction tray
tray adapted to induction crockery, as recommended by the manufacturer
6 Classification
Add the following subclause:
6.2 Addition:
Appliances normally used on a table shall be at least IPX3. Other appliances shall be at least
IPX4.
7 Marking and instructions
7.1 Add the following:
Appliances incorporating induction heating sources shall also be marked with:
– the operating frequency or operating frequency range, in kilohertz (kHz);
– the total power input of all the induction heating units that can operate simultaneously, in
watts (W) or kilowatts (kW), unless this is indicated in the instructions;
– the total power input of all the non-induction heating units that can operate
simultaneously, in watts (W) or kilowatts (kW), unless this is indicated in the instructions.
NOTE 101 The power input to be marked or declared is the highest power input that any switch arrangement will allow.

60335-2-49 Amend. 1 © IEC:2008 – 5 –
Any cover giving access to live parts at a working voltage exceeding 250 V shall be marked
with symbol IEC 60417-5036 (2002-10), or with the following warning:
WARNING – DANGEROUS VOLTAGE
Covers giving access to induction coils shall be marked with symbol IEC 60417-5140
(2003-04), or with the following warning:
CAUTION – MAGNETIC FIELD
NOTE 102 If it is not possible to mark these warnings on the cover, they may be placed close to the cover-
retaining screws.
7.6 In the addition, delete the symbol for equipotentiality and add the following new symbols:
[symbol IEC 60417-5041 (2002-10)] caution, hot surface

[symbol IEC 60417-5140 (2003-04)] non-ionizing electromagnetic radiation

7.12 Replace the second paragraph of the addition by the following:
If symbols IEC 60417-5021 (2002-10), IEC 60417-5041 (2002-10) and IEC 60417-5140 (2003-
04) are marked on the appliance, their meaning shall be explained.
Add the following to the addition:
The instructions for appliances incorporating induction heating sources shall include the
substance of the following warning and information:
– WARNING: If the surface of coil carriers changes to darker colour or shows cracks,
immediately disconnect the appliance from the supply.
– metallic objects such as kitchen utensils, cutlery, etc., shall not be placed on the induction
tray within zones provided for the induction crockery since they could get hot;
– only use induction crockery and induction trays recommended by the manufacturer;
– users with heart pacemakers should consult with the manufacturer (unless specific details
are given).
Add the following:
Modification:
The instruction concerning persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge is not applicable.
7.12.1 Add the following after the first paragraph of the replacement:
For appliances incorporating swivelling radiant heaters, the installation instructions shall
include detailed information concerning the area of swivelling with regard to the surrounding
conditions. Information shall be given on how to limit the swivelling area by the installer.
The operation of appliances incorporating induction heating sources requires an increased
instruction of the personnel. In addition, the instructions shall state that any repairs shall be
carried out only by persons trained or recommended by the manufacturer.

– 6 – 60335-2-49 Amend. 1 © IEC:2008
7.15 Add the following:
For appliances incorporating induction heating sources in modular design, the additional
label shall be fixed to the heating module (generator).
Add the following new subclauses:
7.102 If a swivel radiant heater can be swung over adjacent areas or appliances, the
instructions for use and installation shall indicate this range. If the temperature rise of the top
of the adjacent area or appliance exceeds 65 K during the tests of Clause 11, or 125 K during
the tests of Clause 19, the installation instructions provided by the manufacturer shall include
the substance of the following warning, which shall also be included on a non-permanent label
attached to the appliance:
WARNING: If this radiant heater is positioned adjacent to other areas or appliances, it is
recommended that, within the range of the radiation, these areas or
appliances be made of non-combustible material, otherwise, they shall be
clad with a non-combustible heat-insulating material, and attention is to be
paid to fire prevention regulations.
Compliance is checked by inspection.
7.103 Food warming areas of radiant heaters adjacent to the appliance shall be
permanently marked if the temperature rise during Clause 11 exceeds 65 K. This marking is
not required if the swivelling area is between a bank of other appliances.
Compliance is checked by inspection.
7.104 The side of the radiant heater case facing the user (front side) shall be permanently
marked with symbol IEC 60417-5041 (2002-10).
Compliance is checked by inspection.
7.105 The zones on induction trays where the induction crockery is to be placed shall be
marked permanently, e.g. by an appropriate design.
Compliance is checked by inspection.
10 Power input and current
10.1 Replace the text by the following:
10.1 Modification:
Instead of the first paragraph of the requirement, the following applies:
The power input of appliances without induction heating sources, at rated voltage and at
normal operating temperature, shall not deviate from the rated power input by more than the
deviation shown in Table 1.
The power input of appliances having only induction heating sources, at rated voltage and
at normal operating temperature, shall not deviate from the rated power input by more than
10 %.
The measurement is made before the controls are adjusted to the reduced setting.

60335-2-49 Amend. 1 © IEC:2008 – 7 –
For appliances incorporating induction and non-induction heating sources, the following
applies:
The power input of the induction heating sources and the non-induction heating sources is
measured separately, in each case using a combination of heating units that can be on at
the same time to give the highest power input. For the induction heating sources, the
measurement is made before the controls are adjusted to the reduced setting.
For induction heating sources, the power input so measured shall not deviate from the
power input marked or declared by the manufacturer (see 7.1) by more than 10 %. For non-
induction heating sources, the power input so measured shall not deviate from the power
input marked or declared by the manufacturer (see 7.1) by more than the deviation shown in
Table 1 for heating appliances.
In addition, the power input of the appliance when the induction and non-induction heating
sources are operated simultaneously shall not deviate from the rated power input by more
than 10 %.
Addition:
NOTE 101 For appliances having more than one heating unit, the total power input may be determined by
measuring the power input of each heating unit separately (see also 3.1.4).
11 Heating
Add the following subclause:
11.1 Addition:
For radiant heaters, 11.101 applies.
Add the following subclause:
11.3 Addition:
NOTE 101 If the measurements can be unduly influenced by emissions from an induction heating source, i.e.
the magnetic field, this must be taken into account.
In general, the use of thermocouples is not recommended because of the expected faulty heating-up of the
thermocouples caused by the induction heating source. For example, the temperature rise of the induction
heating source can be determined by using a platinum resistance, preferably of high resistance, with twisted
connecting wires. The platinum resistances are placed on the hottest point of the winding so as to influence as little
as possible the temperature to be measured.
11.4 Replace the first paragraph of the replacement by the following:
The non-induction heating units of the appliance are operated under normal operation at
1,15 times the power input marked or declared.
Induction heating units are operated simultaneously and supplied separately at the most
unfavourable voltage between 0,94 times minimum rated voltage and 1,06 times maximum
rated voltage.
If it is not possible to switch on all heating elements or induction heating sources at the
same time, the test is made with each of the combinations that the switch arrangement will
allow, the highest load possible with each switching arrangement being in circuit.

– 8 – 60335-2-49 Amend. 1 © IEC:2008
11.7 Replace the text of the replacement by the following:
Appliances incorporating induction heating sources are operated at maximum setting of the
controls for one cycle, which consists of a heating-up phase and a keeping warm phase.
Appliances without induction heating sources are operated until steady conditions are
established.
NOTE 101 The duration of the test on non-induction appliances may consist of more than one cycle of operation.
Add the following subclause:
11.8 Addition:
NOTE 101 The crockery itself is regarded as functional surface.
Add the following new subclause:
11.101 For radiant heaters, the temperature rise limit of 65 K applies to the areas, including
walls, which are reached by the radiation. If this temperature rise limit is exceeded, the
requirements of 7.102 apply.
19 Abnormal operation
19.1 Add the following:
Appliances incorporating induction heating sources are also subjected to the tests of
19.101 and 19.102.
For radiant heaters, 19.103 applies.
19.2 Add the following:
Appliances incorporating induction heating sources are operated fully loaded, with empty
induction crockery without covers (cloches) in their position, until steady conditions are
established.
Add the following subclause:
19.3 Addition:
Induction heating sources are supplied with a voltage of 1,06 times the rated voltage.
Add the following subclause:
19.13 Modification:
For appliances incorporating induction heating sources having working voltages above
250 V, the following test voltages apply:
– 1 000 V is increased to 1,2 x U + 700 V;
– 2 750 V is increased to 1,2 x U + 2 450 V;
– 3 750 V is increased to 2,4 x U + 3 150 V.
where U is the working voltage.

60335-2-49 Amend. 1 © IEC:2008 – 9 –
Addition:
The temperature of the induction windings shall not exceed the values specified in Table 8.
Add the following new subclauses:
19.101 Appliances incorporating induction heating sources shall be constructed so that
the risk of fire, mechanical hazard or electric shock is obviated as far as is practicable in the
event of incorrect operation or the development of defects in control devices or circuit
components.
Compliance is checked by applying any form of operation or any defect in the relevant circuits
which may be expected in normal use while the appliance is operated under normal
operation at rated voltage or at the upper limit of the rated voltage range. Only one fault
condition is reproduced at a time, the test being made consecutively.
NOTE Examples for fault conditions are:
– drop-out of contactors and of electromagnetic components;
– failure of motors to start;
– drop in voltage supply, re-appearance of the voltage, voltage interruptions of up to 0,5 s;
– fault conditions specified in 19.11, as applicable.
Examination of the appliance and its circuit diagrams will generally show the fault conditions to be simulated.
19.102 Appliances incorporating induction heating sources shall be constructed so that a
small piece of metal being situated on a coil carrier shall not cause the temperature of the
windings of this coil carrier to exceed the relevant values specified in Table 8, or shall not
lead to a damage of the insulation of this coil carrier.
Compliance is checked by placing a piece of flat mild steel, 2 mm thick and having
dimensions 100 mm x 20 mm, in the most unfavourable situation on a coil carrier. The
appliance is supplied at rated voltage, all controls are set to their maximum.
19.103 For radiant heaters, the limit of 125 K temperature rise applies to the areas,
including walls, which are reached by the radiation. If this temperature rise limit is exceeded,
the requirements of 7.102 apply.
21 Mechanical strength
Replace the text by the following:
This clause of Part 1 is applicable except as follows.
21.1 Addition:
The impact test is also applied to the coil carriers.

– 10 – 60335-2-49 Amend. 1 © IEC:2008
22 Construction
22.101 Replace the text by the following:
For three-phase appliances, thermal cut-outs protecting circuits with heating elements, and
those for motors of which the unexpected starting may cause a hazard, shall be of the
non-self-resetting and trip-free type, and shall provide all-pole disconnection from related
supply circuits.
For single-phase appliances and for single-phase heating elements and/or motors connected
between one phase and neutral or between phase and phase, thermal cut-outs protecting
circuits with heating elements, and those for motors of which the unexpected starting may
cause a hazard, shall be of the non-self-resetting and trip-free type, and shall provide at least
one-pole disconnection.
If the non-self-resetting thermal cut-out is only accessible after removing parts with the aid
of a tool, the trip-free type is not required.
NOTE 1 Thermal cut-outs of the trip-free type have an automatic action, with a reset actuating member, so
constructed that the automatic action is independent of manipulation or position of the reset mechanism.
Thermal cut-outs of the bulb and capillary type that operate during the tests of Clause 19
...