IEC 60335-2-72:2002/AMD1:2005

INTERNATIONAL IEC
STANDARD 60335-2-72
AMENDMENT 1
2005-11
Amendment 1
Household and similar electrical appliances –
Safety –
Part 2-72:
Particular requirements for automatic
machines for floor treatment for commercial
and industrial use
 IEC 2005 Droits de reproduction réservés  Copyright - all rights reserved
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– 2 – 60335-2-72 Amend. 1  IEC:2005(E)
FOREWORD
This amendment has been prepared by subcommittee 61J: Electrical motor-operated cleaning
appliances for industrial use, 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
61J/203/FDIS 61J/211/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• withdrawn,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.
_____________
CONTENTS
Add the titles of the new Annexes BB and CC as follows:
Annex BB Measurement of acoustical noise.
Annex CC Falling-object protective structures (FOPS) – Dynamic test and performance
requirements.
Add, in the list of figures, the titles of the new Figures 102 to 105 as follows:
Figure 102 – Apparatus for testing the abrasion resistance of current-carrying hoses
Figure 103 – Apparatus for testing the resistance to flexing of current-carrying hoses
Figure 104 – Configuration of the hose for the freezing treatment
Figure 105 – Flexing positions for the hose after removal from the freezing cabinet

FOREWORD
Add, at the end of the Foreword, the following new text:
The following differences exist in the countries indicated below:
– 7.12 No requirements for sound and vibration markings exist (USA).

60335-2-72 Amend. 1  IEC:2005(E) – 3 –
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.
1 Scope
Delete Note 101and renumber the subsequent notes accordingly.
2 Normative references
Add the following new references:
ISO 2631-1, Mechanical vibration and shock – Evaluation of human exposure to whole-body
vibration – Part 1: General requirements
ISO 3471, Earth-moving machinery – Roll-over protective structures – Laboratory tests and
performance requirements
ISO 3743-1, Acoustics – Determination of sound power levels of noise sources – Engineering
methods for small, movable sources in reverberant fields – Part 1: Comparison method for
hard-walled test rooms
ISO 3744, Acoustics – Determination of sound power levels of noise sources using sound
pressure – Engineering method in an essentially free field over a reflecting plane
ISO 4743-1, Acoustics – Determination of sound power levels of noise sources – Engineering
methods for small, movable sources in reverberant fields – Part 1: Comparison method for
hard-walled test rooms
ISO 4871, Acoustics – Declaration and verification of noise emission values of machinery and
equipment
ISO 5349-1, Mechanical vibration – Measurement and evaluation of human exposure to hand-
transmitted vibration – Part 1: General requirements
ISO 5353, Earth-moving machinery, and tractors and machinery for agriculture and forestry –
Seat index point
ISO 6344-2, Coated abrasives – Grain size analysis – Part 2: Determination of grain size
distribution of macrogrits P12 to P220
ISO 11201, Acoustics – Noise emitted by machinery and equipment – Measurement of
emission sound pressure levels at a work station and at other specified positions –
Engineering method in an essentially free field over a reflecting plane
ISO/TR 11688-1, Acoustics – Recommended practice for the design of low-noise machinery
and equipment – Part 1: Planning
ISO 12100-2, Safety of machinery – Basic concepts, general principles for design – Part 2:
Technical principles
– 4 – 60335-2-72 Amend. 1  IEC:2005(E)
3 Definitions
3.1.9 Add, after the first paragraph, the following new paragraph:
Power outlets for accessories are loaded with a resistive load in accordance with the marking.
Add the following new definitions:
3.107
water-suction cleaning appliance
appliance for aspirating an aqueous solution that may contain foaming detergent
3.108
motorized cleaning head
accessory containing a motor that is supplied from the appliance and which is attached to the
end of a hand-held hose or tube
NOTE The main cleaning head permanently attached is not regarded as a motorized cleaning head.
7 Marking and instructions
7.1 Replace the last dashed item by the following:
– the symbol indicating the maximum gradient of operation, with the value of x being a
minimum of 2.
Add:
7.6 Addition:
x %
maximum gradient of operation
[symbol IEC 60417-5935 (DB:2002-10)] motorized cleaning head for
water-suction cleaning
7.12 Replace the existing text by the following:
Addition:
The front cover of the instruction manual shall include the substance of the following:
CAUTION Read the instruction manual before using the appliance.
This wording may be replaced by symbols 0434 and 1641 of ISO 7000. If these symbols are
used, their meaning is to be explained in the instructions for use.
The instruction manual shall include the substance of the following warnings, as applicable.
– CAUTION  This appliance is not suitable for picking up hazardous dust.
– CAUTION  This appliance is for dry use only and is not to be used or stored outdoors in
wet conditions.
– CAUTION  Do not use on surfaces having a gradient exceeding that marked on the
appliance.
60335-2-72 Amend. 1  IEC:2005(E) – 5 –
– WARNING  Only use the brushes provided with the appliance or those specified in the
instruction manual. The use of other brushes may impair safety.
The instruction manual shall give details regarding the following, as applicable:
– a statement that the appliance is only to be used by persons who have been adequately
instructed;
– the precautions to be taken when using the appliance under specific conditions such as
handling flammable liquids or dust, and dust hazardous to health;
– a statement that the appliance is to be disconnected from its power source during cleaning
or maintenance and when replacing parts or converting the appliance to another function:
• for mains operated appliances, the plug is to be removed from the socket-outlet;
• for battery operated appliances, the key of the supply switch is to be removed or an
equivalent disconnection is to be made;
– a statement that doors and covers are to be positioned as indicated in the instruction
manual before using the appliance;
– the precautions to be taken when changing brushes or other attachments which require
the appliance to be energized;
– the intended use of brushes which are specified for the appliance;
– a warning that large diameter brushes provided specifically for dry buffing are not intended
for general polishing.
The instruction manual shall state
– the weighted r.m.s. acceleration value to which the operators’ arms are subjected in m/s²,
separately for each arm (if applicable), measured in accordance with ISO 5349-1 for arm
vibrations, the appliance being supplied at rated voltage or at the maximum rated
voltage for machines with a range of voltages
2,
– the weighted r.m.s. acceleration value to which the operator is subjected in m/s measured
in accordance with ISO 2631-1, the appliance being supplied at rated voltage and
operated under normal operation.
The instruction manual for mains operated appliances shall include the substance of the
following:
– do not allow the rotating brushes to come into contact with the supply cord;
– regularly examine the supply cord for damage, such as cracking or ageing. If damage is
found, replace the cord before further use;
– only replace the supply cord with the type specified in the instruction manual;
– only use the socket outlet on the appliance for purposes specified in the instruction
manual.
The instruction manual for appliances having a traction drive and a mass exceeding 100 kg
shall include the substance of the following:
– in order to prevent unauthorised use of the appliance, the power source is to be switched
off or locked, for example by removing the key of the power switch;
– appliances left unattended are to be secured against unintentional movement.
The instruction manual for appliances having anchorage points for installing roll-over
protection systems (ROPS) or falling object protection systems (FOPS) shall include
instructions for fitting the system. The intended purpose of any protection system shall be
stated.
– 6 – 60335-2-72 Amend. 1  IEC:2005(E)
The instructions for appliances having a current-carrying hose operating at other than safety
extra-low voltage shall include the substance of the following:
CAUTION: This hose contains electrical connections:
– do not use to collect water;
– do not immerse in water for cleaning;
– the hose should be checked regularly and must not be used if damaged.
If the symbol IEC 60417-5935 is used, its meaning shall be explained.
Add the following new subclauses:
7.12.101 The instructions shall include a noise emission declaration according to BB 2.7.
7.14 Addition:
The height of symbol IEC 60417-5935 shall be at least 15 mm.
Compliance is checked by measurement.
7.101 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.
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.
NOTE This symbol is an information sign and, except for the colours, the rules of ISO 3864-1 apply.
Compliance is checked by inspection.
7.102 Power outlets for accessories shall be marked with the maximum load in watts.
NOTE This marking may be on the appliance close to the appliance outlet.
Compliance is checked by inspection.
10 Power input and current
Replace the existing text by the following:
This clause of Part 1 is applicable except as follows.
10.1 Addition:
The power input of motorized cleaning heads is measured separately.

60335-2-72 Amend. 1  IEC:2005(E) – 7 –
15 Moisture resistance
15.2 Replace the last sentence by the following:
Motorized cleaning heads of water-suction cleaning appliances are placed in a container,
the base of which is level with the surface supporting the appliance. The container is filled
with a detergent solution to a level of 5 mm above its base, this level being maintained
throughout the test. The solution 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.
The appliance is operated until its liquid container is completely full and for a further 5 min.
NOTE 102 The solution is to be stored in a cool atmosphere and used within seven days of its preparation.
NOTE 103 The chemical designation of dodecyl sodium sulphate is C12H25NaSO4.
After each of these tests, the appliance shall withstand the electric strength test of 16.3.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances or creepage distances below the values specified in Clause 29.
NOTE 104 The appliance is allowed to stand in normal test room atmosphere for 24h before being subjected to
the test of 15.3
Add the following new subclause:
15.101 Motorized cleaning heads of water suction cleaning appliances shall be resistant
to liquids that may come into contact with them.
Compliance is checked by the following 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 60068-2-32. 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 14.2.7 of IEC 60529,
the water containing approximately 1 % NaCl.
The motorized cleaning head shall then withstand the electric strength test of 16.3, the
voltage being applied between the live parts and the solution, and inspection shall show that
there is no trace of saline solution on insulation which could result in a reduction of
clearances and creepage distances below the values specified in Clause 29.
NOTE The test is not carried out on motorized cleaning heads of class III construction having a working
voltage up to 24 V.
– 8 – 60335-2-72 Amend. 1  IEC:2005(E)
16 Leakage current and electric strength
Replace the existing text by the following:
This clause of Part 1 is applicable except as follows.
16.3 Addition:
Current-carrying hoses, except for their electrical connections, are immersed for 1 h in water
containing approximately 1 % NaCl, at a temperature of 20 °C ± 5 °C. While the hose is still
immersed, a voltage of 2 000 V is applied for 5 min between each conductor and all the other
conductors connected together. A voltage of 3 000 V is then applied for 1 min between all the
conductors and the saline solution.
19 Abnormal operation
19.7 Add the following new paragraph:
Motorized cleaning heads are tested with the
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