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IEC 60335-2-90
Edition 4.0 2019-11
INTERNATIONAL
STANDARD
AMENDMENT 1
Household and similar electrical appliances – Safety –
Part 2-90: Particular requirements for commercial microwave ovens
IEC 60335-2-90:2015-08/AMD1:2019-11(en)
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IEC 60335-2-90
Edition 4.0 2019-11
INTERNATIONAL
STANDARD
AMENDMENT 1
Household and similar electrical appliances – Safety –
Part 2-90: Particular requirements for commercial microwave ovens
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 97.040.20 ISBN 978-2-8322-7578-8
– 2 – IEC 60335-2-90:2015/AMD1:2019
© IEC 2019
FOREWORD
This amendment has been prepared by subcommittee 61B: Safety of microwave appliances for
household and commercial use, of IEC technical committee 61: Safety of household and similar
electrical appliances.
The text of this amendment is based on the following documents:
CDV Report on voting
61B/618/CDV 61B/631/RVC
61B/619/CDV 61B/632/RVC
61B/617/CDV 61B/633/RVC
61B/616/CDV 61B/634/RVC
61B/612/CDV 61B/635/RVC
61B/620/CDV 61B/636/RVC
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 publication will remain unchanged until the
stability date indicated on the IEC website 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• withdrawn,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 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.
A bilingual version of this publication may be issued at a later date.
___________
1 Scope
Replacement:
Replace the first dashed item of NOTE 105 with the following:
– for appliances intended to be used in vehicles or on trains, on board ships or board aircraft, additional
requirements may be necessary;
© IEC 2019
2 Normative references
Add the following references to the existing list:
IEC 60335-2-36, Household and similar electrical appliances – Safety – Part 2-36: Particular
requirements for commercial electric cooking ranges, ovens, hobs and hob elements
IEC 60335-2-42, Household and similar electrical appliances – Safety – Part 2-42: Particular
requirements for commercial electric forced convection ovens, steam cookers and steam-
convection ovens
IEC 60335-2-49, Household and similar electrical appliances – Safety – Part 2-49: Particular
requirements for commercial electric hot cupboards
IEC 60335-2-75, Household and similar electrical appliances – Safety – Part 2-75: Particular
requirements for commercial dispensing appliances and vending machines
3 Definitions
Replace the title of this clause, not the numbering, with “Terms and definitions”.
3.113
microwave enclosure
Renumber Note 2 with Note 1 and Note 3 with Note 2.
11 Heating
11.7 Add the following text after the first sentence:
The last cycle does not include a rest period of 1 min.
15 Moisture resistance
15.2 Replace the text of the addition with the following:
A quantity of 0,5 l of the same spillage solution is poured steadily over the shelf over a period
of 1 min. If the shelf can collect spilled liquid, it is filled with the solution and a further 0,5 l is
then added over a period of 1 min.
15.101 Replace the first and second paragraph of the compliance criterion with the following:
The probe is completely immersed in water containing approximately 1 % NaCl and having a
temperature of 20 °C ± 5 °C. The solution is heated to the boiling point in approximately 15 min.
The probe is then removed from the boiling solution and immersed in the solution having a
temperature of 20 °C ± 5 °C for 30 min.
This procedure is carried out five times, after which the probe is removed from the solution. All
traces of liquid are then removed from the surface.
Replace the Note with the following:
NOTE Detachable temperature-sensing probes are not connected to the appliance for this test. Non-detachable
temperature-sensing probes are tested in the cavity, the probe being immersed as much as possible.
– 4 – IEC 60335-2-90:2015/AMD1:2019
© IEC 2019
19 Abnormal operation
19.13 Replace the first sentence of the first paragraph with the following.
During the tests, the temperature of windings shall not exceed the values shown in Table 8.
19.101 Add the following text after the last paragraph:
If microwave leakage exceeds 100 W/m , the following alternative measurement method shall
be applied, which modifies the microwave leakage limit of 19.13.
In order to identify and mark all spots where peak values of microwave leakage exceed
100 W/m , the instrument antenna is moved again over the external surface of the appliance,
particular attention being given to the door and its seals.
NOTE 1 A peak hold function of the measurement instrument, if any, can be activated for identification of spots
where peak values of microwave leakage exceeds 100 W/m .
The leakage values of each such spot shall be recorded and the averaged leakage value of any
spot over the most onerous 20 s shall not exceed 100 W/m . Furthermore, the peak value shall
not exceed 500 W/m .
NOTE 2 Since the stirrer and/or turntable revolution time and the number of microwave stirrer blades determine the
frequency and duration of actual peak leakage values, instruments
...