IEC 60335-2-67:2012

IEC 60335-2-67 ®
Edition 4.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-67: Particular requirements for floor treatment machines, for
commercial use
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-67: Exigences particulières pour les machines de traitement des sols,
à usage commercial
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IEC 60335-2-67 ®
Edition 4.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –

Part 2-67: Particular requirements for floor treatment machines, for

commercial use
Appareils électrodomestiques et analogues – Sécurité –

Partie 2-67: Exigences particulières pour les machines de traitement des sols,

à usage commercial
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 23.080; 91.140.65 ISBN 978-2-8322-0067-4

– 2 – 60335-2-67 © IEC:2012
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 General requirement . 11
5 General conditions for the tests . 11
6 Classification . 11
7 Marking and instructions . 12
8 Protection against access to live parts . 15
9 Starting of motor-operated appliances . 15
10 Power input and current . 15
11 Heating . 15
12 Void. 16
13 Leakage current and electric strength at operating temperature . 16
14 Transient overvoltages . 16
15 Moisture resistance . 16
16 Leakage current and electric strength . 18
17 Overload protection of transformers and associated circuits . 18
18 Endurance . 18
19 Abnormal operation . 18
20 Stability and mechanical hazards . 19
21 Mechanical strength . 20
22 Construction . 22
23 Internal wiring . 24
24 Components . 24
25 Supply connection and external flexible cords . 24
26 Terminals for external conductors . 26
27 Provision for earthing . 26
28 Screws and connections . 26
29 Clearances, creepage distances and solid insulation . 26
30 Resistance to heat and fire . 26
31 Resistance to rusting . 26
32 Radiation, toxicity and similar hazards . 26
Annexes . 31
Annex AA (normative) Precast paving slabs . 32
Annex BB (normative) Requirements for internal combustion engine powered
machines using liquefied petroleum gas (LPG) . 33
Annex CC (informative) Emission of acoustical noise . 36
Annex DD (informative) Emission of vibration . 39
Bibliography . 40

60335-2-67 © IEC:2012 – 3 –
Figure 101 – Impact test apparatus . 27
Figure 102 – Apparatus for testing the abrasion resistance of current-carrying hoses . 28
Figure 103 – Apparatus for testing the resistance to flexing of current-carrying hoses . 28
Figure 104 – Configuration of the hose for the freezing treatment . 29
Figure 105 – Flexing positions for the hose after removal from the freezing cabinet . 29
Figure 106 – Warning symbol: Do not inhale exhaust fumes . 30

Table 12 – Pull force and torque . 25
Table CC.1 – Determination of uncertainty . 38

– 4 – 60335-2-67 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-67: Particular requirements for floor
treatment machines, for commercial use

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
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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6) All users should ensure that they have the latest edition of this publication.
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
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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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60335-2-67 has been prepared by subcommittee 61J: Electrical
motor-operated cleaning appliances for commercial use, of IEC technical committee 61:
Safety of household and similar electrical appliances.
This fourth edition cancels and replaces the third edition published in 2002 and its
Amendment 1 (2005). It constitutes a technical revision.
The principal changes in this edition as compared with the third edition of IEC 60335-2-67 are
as follows (minor changes are not listed):
– the title has been changed for better distinction with regard to IEC 60335-2-72;
– the scope has been revised editorially to avoid misunderstandings;
– terms and definitions has been revised with regard to the requirements revised;

60335-2-67 © IEC:2012 – 5 –
– the standard has been revised in general and updated regarding state-of-the-art, as far as
necessary, in particular some changes have been made to Clauses 15, 22 and 25;
– a new Annex BB (LPG requirements) was added;
– a new Annex CC 'Emission of acoustical noise' was added; and
– a new Annex DD 'Emission of vibration' was added.
The text of this standard is based on the following documents:
FDIS Report on voting
61J/489/FDIS 61J/498/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fifth edition (2010) 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 floor treatment
machines for commercial use.
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.
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.

– 6 – 60335-2-67 © IEC:2012
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
60335-2-67 © IEC:2012 – 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.
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 may 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 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.
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, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 8 – 60335-2-67 © IEC:2012
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-67: Particular requirements for floor
treatment machines, for commercial use

1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of powered floor treatment machines
intended for commercial indoor or outdoor use for the following applications:
– scrubbing,
– wet or dry pick-up,
– polishing and dry buffing,
– application of wax, sealing products and powder based detergents,
– shampooing,
– stripping, grinding and scarifying
of floors with an artificial surface.
Their cleaning motion is more lateral or periodic than linear.
NOTE 101 By contrast, the cleaning motion of machines covered by IEC 60335-2-72 is more linear than lateral or
periodic.
NOTE 102 This standard applies to machines for commercial use. The following list, although not
comprehensive, gives an indication of locations that are included in the scope:
– public use areas such as hotels, schools, hospitals;
– industrial locations, for example factories and manufacturing shops;
– retail outlets, for example shops and supermarkets;
– business premises, for example offices and banks;
– all uses other than normal housekeeping purposes.
They are not equipped with a traction drive. The following power systems are covered:
– internal combustion engines,
– mains powered motors up to a rated voltage of 250 V for single-phase appliances and
480 V for other appliances,
– battery-powered motors.
Battery powered machines may be equipped with a built-in battery charger.
This standard does not apply to
– vacuum cleaners and water-suction cleaning appliances for household use
(IEC 60335-2-2);
– floor treatment appliances for household use according to IEC 60335-2-10;
– spray extraction machines for commercial use (IEC 60335-2-68);
– wet and dry vacuum cleaners, including power brush, for commercial use
(IEC 60335-2-69);
60335-2-67 © IEC:2012 – 9 –
– floor treatment machines with or without traction drive, for commercial use, according to
IEC 60335-2-72;
– hand-held and transportable motor-operated electric tools (IEC 60745 series, IEC 61029
series);
– machines designed for use in corrosive or explosive environments (dust, vapour or gas);
– machines designed for picking up hazardous dusts (as defined in IEC 60335-2-69),
inflammable substances, or glowing particles;
– machines designed for use in vehicles or on board of ships or aircraft.
NOTE 103 Attention is drawn to the fact that in many countries, additional requirements on the safe use of the
equipment covered can be specified by the national health authorities, the national authorities responsible for the
protection of labour, the national water supply authorities and similar authorities.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60312-1, Vacuum cleaners for household use – Part 1: Dry vacuum cleaners – Methods
for measuring the performance
ISO 6344-2, Coated abrasives – Grain size analysis – Part 2: Determination of grain size
distribution of macrogrits P12 to P220
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
conditions under which the machine is operated in normal use, as intended by the
manufacturer
It denotes the load corresponding to the rated power input or the highest obtainable load of
all particular loads of the various functions that can be operated at the same time according to
the manufacturer’s instructions.
Tanks of machines, if applicable, are filled before starting the operation to the highest level as
indicated on the tank, or completely if no marking is provided.
Socket-outlets for accessories are loaded with a resistive load in accordance with the
marking. Suction functions, if applicable, are switched on during operation.
The normal operation related to the operational functions is specified in 3.1.9.101 to
3.1.9.103.
3.1.9.101 Scrubbing, stripping, grinding and scarifying machines are operated with the
appropriate brushes or pads on a surface of hydraulically pressed concrete paving slabs (see
Annex AA).
An alternative is a smooth concrete area of a surface consistency comparable with
hydraulically pressed concrete paving slabs.

– 10 – 60335-2-67 © IEC:2012
3.1.9.102 Polishing and dry buffing machines are operated as follows.
PVC or comparable surfaces are considered to be suitable for establishing normal operation.
The peak of input occurring during the drying process of the chemical applied to treat the
surface is not taken as normal operation but is averaged by extending measurements over a
period of at least 10 min.
3.1.9.103 Carpet shampooers are operated on a test surface consisting of a carpet, in
accordance with IEC 60312-1, the carpet being fastened to the floor.
Prior to testing, the brush of the shampooing machine is conditioned by operating it for 15 min
on a clean, dry concrete surface. After running on the concrete surface the brush is immersed
in a shampoo solution for at least 30 min.
3.101
water-suction cleaning machine
machine for applying and sucking up a water-based cleaning solution
3.102
motorized cleaning head
hand-held or hand-guided cleaning device connected to the machine, with an integrated
electrical motor
Note 1 to entry: The permanently attached main cleaning head is not regarded as a motorized cleaning head.
3.103
traction drive
system used to propel the machine, e.g. by powered wheels
Traction by the effect of rotating brushes is not included
3.104
operator presence control
OPC
control device that automatically interrupts the power, e.g. to a drive or an engine, when the
operator's actuating force is removed
Note 1 to entry: Such devices may be, for example, continuous action controls ("hold-to-run" controls).
3.105
guard
part of the machine specifically designed to provide protection by means of a physical barrier,
such as, for example, a casing, a shield, a cover, a screen, a door, an enclosure or a fence;
other parts of the machine that fulfil a primarily operational function, such as, for example, the
frame of the machine, may also fulfil a protective function but are not referred to as guards
Note 1 to entry: Three main kinds of guards can be distinguished: fixed guards, interlocking moveable guards
and adjustable guards. Interlocking movable guards are required where frequent access is envisaged, while fixed
guards can be used where frequent access is not envisaged.
3.106
operator
person installing, operating, adjusting, maintaining, cleaning or moving the machine
3.107
test solution
solution which consists of 20 g of NaCl and 1 ml of a solution of 28 % by mass of dodecyl
sodium sulphate in each 8 l of water
Note 1 to entry: The chemical designation of dodecyl sodium sulphate is C H NaSO .
12 25 4
60335-2-67 © IEC:2012 – 11 –
3.108
commercial use
intended use of machines covered by this standard, i.e. not intended for normal housekeeping
purposes by private persons but which may be a source of danger to the public
I.e. in particular that
– the machines may be used by cleaning contractors, cleaning staff, etc.;
– they are used in commercial or public premises (i.e. offices, shops, hotels, hospitals,
schools, etc.) or in industrial (plants, etc.) and light industrial (workshops, etc.)
environments.
Note 1 to entry: Commercial use is also called professional use.
4 General requirement
This clause of Part 1 is applicable except as follows.
Replacement of the first paragraph by the following text:
Machines shall be constructed so that they function safely so as to cause no danger to
persons or surroundings during normal use, even in the event of carelessness, and during
installation, adjusting, maintenance, cleaning, repairing or transportation.
Addition:
For the purpose of this standard, the term ‘appliance’ as used in Part 1 is to be read as
‘machine’.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.101 The test solution is to be stored in a cool atmosphere and used within seven days
after its preparation.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Machines shall be one of the following classes with respect to the protection against electric
shock:
– class I,
– class II or
– class III.
Compliance is checked by inspection and by the relevant tests.
6.2 Addition:
Mains supplied machines for indoor use and intended for dry cleaning only, shall be at least
IPX0. Other machines shall be at least IPX4.

– 12 – 60335-2-67 © IEC:2012
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
th
7.1 Replacement of the 4 dashed item as follows:
– business name and address of the manufacturer and, if applicable, his authorized
representative; any address shall be sufficient to ensure postal contact;
Addition:
Machines shall be marked in addition with the following:
– serial number, if any;
– designation of the machine and series or type, allowing the technical identification of the
product. This may be achieved by a combination of letters and/or numbers;
NOTE 101 Designation of machine, series or type includes the model or type reference as required in Part 1.
– year of construction, i.e. the year in which the manufacturing process is completed.
NOTE 102 The year of construction can be part of the serial number.
Machines shall be marked with the mass of the most usual configuration in kg.
Machines intended to be used indoors and powered by internal combustion engines shall be
marked with the symbol according to Figure 106. It is acceptable to show this symbol in
monochrome colour.
7.1.101 Motorized cleaning heads shall be marked with
– rated voltage or rated voltage range in volts;
– rated power input in watts;
– name, trade mark or identification mark of the manufacturer or responsible vendor;
– model or type reference;
– mass of the most usual configuration in kg.
Motorized cleaning heads for water-suction cleaning appliances, except those of class III
construction having a working voltage up to 24 V shall be marked with symbol
IEC 60417-5935 (2002-10).
NOTE This symbol is an information sign and, except for the colours, the rules of ISO 3864-1 apply.
Compliance is checked by inspection.
7.1.102 Socket-outlets for accessories shall be marked with the maximum load in watts on
the socket-outlet or nearby.
Compliance is checked by inspection.
7.6 Addition:
motorized cleaning head for
[symbol IEC 60417-5935 (2002-10)]
water-suction cleaning
60335-2-67 © IEC:2012 – 13 –
th
7.12 Replacement of the 4 paragraph by the following text.
This machine is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge.
Addition:
The front cover of the instructions shall include the substance of the following warning:
CAUTION Read the instructions before using the machine.
This wording may be replaced by symbols ISO 7000-0434 (2004-01) and either
ISO 7000-1641 (2004-01) or ISO 7000-0790 (2004-01).
The instructions shall contain at least the following:
– the business name and full address of the manufacturer and, if applicable, his authorized
representative;
– designation of series or type of the machine as marked on the machine itself, except for
the serial number;
NOTE 101 The designation of series or type can be abstracted, as long as the identification of the product must
be ensured.
– the general description of the machine;
– the intended use of the machine and the auxiliary equipment as covered by the scope of
this standard;
NOTE 102 Examples of auxiliary equipment are spray units, suction units, and lights.
– the meaning of the symbols used on the machine and in the instructions;
– drawings, diagrams, descriptions and explanations necessary for the safe use,
maintenance and repair of the machine and for checking its correct functioning;
– technical data including the markings on the machine;
– information regarding putting into service, safe operation, handling, transportation, and
storage of the machine taking into account its weight;
– instructions to enable adjustment and maintenance to be carried out safely, including the
protective measures that should be taken during these operations;
– the conditions in which the machine meets the requirement of stability during use,
transportation, assembly, dismantling when out of service, testing or foreseeable
breakdowns;
– the procedure to be followed to prevent unsafe situations in the event of accident (e.g.
contact with or spillage of detergents, battery acid, fuel or oil) or equipment breakdown;
– the substance of the following:
This machine is intended for commercial use, for example in hotels, schools, hospitals,
factories, shops, offices and rental businesses.
The instructions shall indicate the type and frequency of inspections and maintenance
required for safe operation, including preventive maintenance measures. They shall, if
applicable, give the specifications of the spare parts if they affect the health and safety of the
operator.
– 14 – 60335-2-67 © IEC:2012
In addition, the instructions shall give the following information, if applicable:
– for battery powered machines, instructions regarding the precautions to be taken for safe
charging;
– precautions to be taken when changing brushes or other attachments;
– information on the detergents or other liquids that may be used including the choice and
use of personal protective equipment (PPE);
– essential characteristics of auxiliary equipment which may be fitted to the machine;
– information regarding safe disposal of batteries;
– the intended use of the brushes specified for the machine;
– if split rims are used for pneumatic tyres, instructions shall be given for the safe change of
tyres.
7.12.101 The instructions shall include warnings concerning ways in which the machine shall
not be used, which in the experience of the manufacturer are likely to occur. At least, it shall
include the substance of the following warnings, if applicable.
– WARNING Operators shall be adequately instructed on the use of these machines.
– WARNING Only use the brushes provided with the appliance or those specified in the
instructions. The use of other brushes may impair safety.
– WARNING This machine is for dry use only.
– WARNING Do not inhale exhaust gas fumes. Only use indoors when adequate ventilation
is provided, and when a second person has been instructed to look after you.
– CAUTION This machine is for indoor use only.
– CAUTION This machine shall be stored indoors only.
– A warning that the machine shall be disconnected from its power source during cleaning or
maintenance and when replacing parts or converting the machine to another function:
• for mains operated machines, by removing the plug from the socket-outlet;
• for battery-powered machines, by safely disconnecting at least the non-frame
connected pole of the battery or by an equivalent method (disconnecting device);
• for internal combustion engine powered machines with a battery starter, by
disconnecting the battery.
Instructions for mains operated machines shall also include the substance of the following:
– WARNING Do not allow the supply cord to come into contact with the rotating brushes or
pads.
Instructions for machines having a current-carrying hose for dry suction, operating at other
than safety extra-low voltage, shall also include the substance of the following:
– WARNING This hose contains electrical connections: do not use it to collect water and
do not immerse in water for cleaning.
Instructions for internal combustion engine powered machines using LPG shall also include
the substance of the following:
– WARNING Machines shall be parked safely.
– The machine shall be inspected by a qualified person regularly, in particular regarding the
LPG container and their connections, as required for safe operation by regional or national
regulations.
7.12.102 Information on noise
NOTE The instructions can provide information on airborne noise emission as indicated in CC.2.7.

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7.12.103 Information on vibration
NOTE The instructions can provide information on vibration emission as indicated in Clause DD.2.
7.13 Addition:
The words “Original instructions” shall appear on the language version(s) verified by the
manufacturer.
7.14 Addition:
The height of symbol IEC 60417-5935 (2002-10) shall be at least 15 mm.
Compliance is checked by measurement.
8 Protection against access to live parts
This clause of Part 1 is applicable except as follows.
8.1 Addition:
Water and water-borne cleaning agents are considered conductive.
9 Starting of motor-operated appliances
This clause of Part 1 is replaced by the following.
It shall only be possible to start the machine by intended actuation of a control device
provided for the purpose. The same requirement applies when restarting the machine after a
stoppage, whatever the cause. This requirement only applies to components where the
unexpected starting might cause a hazard. It does not apply to components such as suction
units, pumps, etc.
Compliance is checked by inspection and test.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.4 Not applicable.
11.6 Not applicable.
11.7 Addition:
Machines are operated until steady conditions are established.

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12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Addition:
For class I appliances where several motors operate at the same time, the leakage current
shall not exceed 3,5 mA.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.2 Addition:
Wet cleaning machines, except shampooing machines, are operated for 10 min with to and
from movements over a distance of 1 m at 15 cycles per minute on a floor of paving slabs with
a smooth surface that are fastened to the bottom of a tray. At the beginning of the test, the
tray is filled with the test solution to a level of approximately 5 mm above the surface of the
floor.
15.2 Replacement:
Machines having a liquid container shall be so constructed that
– spillage of liquid due to normal operation,
– filling including overfilling, and
– overturning of hand-held appliances and unstable machines
does not affect their electrical insulation.
Compliance is checked by the following tests:
The machine is placed on a support inclined at an angle of 10 ° to the horizontal, the liquid
container being filled to half the level indicated in the instructions. A machine is considered to
be unstable if it overturns when a force of 180 N is applied to the top of the machine in the
most unfavourable horizontal direction.
Machines having a liquid container and provided with an appliance inlet are fitted with an
appropriate connector and flexible cable or cord; machines having a liquid container and type
X attachment are fitted with the lightest cross-sectional area specified in Table 11. Other
machines are tested as delivered.
The liquid container of the machine is completely filled with a saline solution of water
containing approximately 1 % NaCl and a further quantity, equal to 15 % of the capacity of the
container or 0,25 l, whichever is the greater, is poured in steadily over a period of 1 min.

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Hand-held appliances and machines that are unstable are then, with the container
completely filled and with the cover or lid in place, overturned from the most unfavourable of
the normal positions of use, and are left in that position for 5 min unless the machine returns
automatically to its normal position of use.
Motorized cleaning heads of water-suction cleaning machines are placed in a tray, the
base of which is level with the surface supporting the machine. The tray is filled with the test
solution to a level of 5 mm above its base, this level being maintained throughout the test.
The machine including the motorized cleaning head is operated until its liquid container is
completely full and afterwards for a further 5 min.
After each of these tests, the machine shall withstand the electric strength test of 16.3.
There shall be no trace of liquid on insulation that reduces the clearances or creepage
distances below the values specified in Clause 29.
15.3 Modification:
The relative humidity shall be (93 ± 6) %.
15.101 Motorized cleaning heads of water-suction cleaning machines shall be resistant
to liquids that may come into contact with them during normal use.
The following test is not applicable to motorized cleaning heads of class III construction
having a working voltage up to 24 V.
Compliance is checked by the following four tests.
The motorized cleaning head is subjected to an impact test as described in IEC 60068-2-75,
the value of the impact being 2 J. The motorized cleaning head is rigidly supported and
three blows are applied to every point of the enclosure that is likely to be weak.
It is then subjected to the free fall test procedure 1 of IEC 60068-2-31. It is dropped
4 000 times from a height of 100 mm onto a steel plate having a thickness of not less than
15 mm. It is dropped
– 1 000 times on its right side;
– 1 000 times on its left side;
– 1 000 times on its front face;
– 1 000 times on its cleaning surface.
The motorized cleaning head is then subjected to the test described in 14.2.4 of IEC 60529,
using the test solution.
The motorized cleaning head is to be operated in a flat-bottomed vessel filled with a saline
solution of water containing approximately 1 % NaCl so that a depth of 3,0 mm of water is
maintained. The
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