Household and similar electrical appliances - Safety - Part 2-68: Particular requirements for spray extraction machines, for commercial use

IEC 60335-2-68:2012 deals with the safety of electrical portable, non-self-propelled motor-operated spray extraction machines with or without attachments and with or without electrical heating elements, intended for commercial indoor use. 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;
- rental services for those machines and all uses other than normal housekeeping purposes.
They are not equipped with a traction drive. The following power systems are covered: mains powered motors up to a rated voltage of 250 V for single-phase appliances and 480 V for other appliances and battery powered motors. This standard applies to machines in which the pressure of the employed cleaning agent does not exceed 2,5 MPa, and in which the product of the pressure (in MPa) and the flow of cleaning agent (in litres per minute) does not exceed 100, and in which the temperature of the cleaning agent at the spray nozzle outlet does not exceed 85 °C. This fourth edition cancels and replaces the third edition published in 2002 and its Amendments 1 (2005) and 2 (2007). It constitutes a technical revision. The principal changes in this edition as compared with the third edition of IEC 60335-2-68 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;
- the standard has been revised in general and updated regarding state-of-the-art, as far as necessary, in particular some changes has been made to Clauses 15, 22 and 25;
- the markings and instructions (Clause 7) have been revised basically;
- a new Annex AA 'Emission of acoustical noise' was added;
- and a new Annex BB 'Emission of vibration' was added. Keywords: Spray extraction machines; cleaning agent.
This publication is to be read in conjunction with IEC 60335-1:2010.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-68: Exigences particulières pour les machines de nettoyage par pulvérisation et aspiration, à usage commercial

La CEI 60335-2-68:2012 traite de la sécurité des machines de nettoyage par pulvérisation et aspiration électriques mobiles non auto-motrices, avec ou sans accessoires et avec ou sans éléments chauffants électriques, destinées à un usage commercial à l'intérieur des locaux. La présente norme s'applique aux machines à usage commercial. La liste suivante, sans être exhaustive, donne une indication des emplacements compris dans le domaine d'application:
- espaces publics tels que les hôtels, les écoles, les hôpitaux;
- sites industriels, par exemple les usines et les ateliers de fabrication;
- commerces, par exemple les magasins de détail et les supermarchés;
- établissements commerciaux, par exemple les bureaux et les banques;
- services de location pour ces machines;
- toute utilisation autre que les utilisations domestiques normales. Ces machines ne possèdent pas de dispositif de transmission. Les systèmes d'alimentation électrique suivants sont couverts: moteurs alimentés par le réseau jusqu'à une tension assignée de 250 V pour les appareils monophasés et 480 V pour les autres appareils, moteurs alimentés par batteries. La présente norme s'applique aux machines dans lesquelles la pression de l'agent nettoyant ne dépasse pas 2,5 MPa ou dont le produit de la pression (en MPa) de l'agent nettoyant par son débit (en litres par minute) n'excède pas 100, et dans lesquelles la température de l'agent nettoyant à la sortie de la buse n'excède pas 85 °C. Cette quatrième édition annule et remplace la troisième édition publiée en 2002 et ses Amendements 1 (2005) et 2 (2007). Elle constitue une révision technique. Les principales modifications de la présente édition par rapport à la troisième édition de la CEI 60335-2-68 sont les suivantes (les changements mineurs ne sont pas listés):
- le titre a été modifié pour une meilleure distinction d'avec la CEI 60335-2-72;
- le domaine d'application a fait l'objet d'une révision éditoriale afin d'éviter toute erreur d'interprétation;
- les termes et définitions ont été révisés par rapport aux exigences révisées;
- la norme a été révisée de manière générale et mise à jour au regard de l'état de l'art, dans la mesure du nécessaire;
- certaines modifications, en particulier, ont été apportées aux Articles 15, 22, et 25;
- les marquages et instructions (Article 7) ont été révisés fondamentalement;
- une nouvelle Annexe AA 'Emission de bruit acoustique' a été ajoutée;
- et une nouvelle Annexe BB 'Emission de vibrations' a été ajoutée. Mots clé: machines de nettoyage par pulvérisation et aspiration; agent nettoyant
Cette publication doit être lue conjointement avec la CEI 60335-1:2010.

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Status
Published
Publication Date
28-Mar-2012
Current Stage
PPUB - Publication issued
Start Date
29-Mar-2012
Completion Date
29-Mar-2012
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IEC 60335-2-68
Edition 4.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-68: Particular requirements for spray extraction machines, for
commercial use
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-68: Exigences particulières pour les machines de nettoyage
par pulvérisation et aspiration, à usage commercial
IEC 60335-2-68:2012
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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---------------------- Page: 2 ----------------------
IEC 60335-2-68
Edition 4.0 2012-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-68: Particular requirements for spray extraction machines, for
commercial use
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-68: Exigences particulières pour les machines de nettoyage
par pulvérisation et aspiration, à usage commercial
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 97.020 ISBN 978-2-8322-0068-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 60335-2-68 © IEC:2012
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope ............................................................................................................................... 7

2 Normative references ....................................................................................................... 8

3 Terms and definitions ....................................................................................................... 8

4 General requirement ....................................................................................................... 10

5 General conditions for the tests ...................................................................................... 10

6 Classification .................................................................................................................. 11

7 Marking and instructions ................................................................................................. 11

8 Protection against access to live parts ............................................................................ 14

9 Starting of motor-operated appliances ............................................................................ 14

10 Power input and current ................................................................................................. 14

11 Heating .......................................................................................................................... 14

12 Void................................................................................................................................ 15

13 Leakage current and dielectric strength at operating temperature ................................... 15

14 Transient overvoltages ................................................................................................... 15

15 Moisture resistance ........................................................................................................ 15

16 Leakage current and electric strength ............................................................................. 17

17 Overload protection of transformers and associated circuits ........................................... 17

18 Endurance ...................................................................................................................... 17

19 Abnormal operation ........................................................................................................ 17

20 Stability and mechanical hazards ................................................................................... 18

21 Mechanical strength ....................................................................................................... 18

22 Construction ................................................................................................................... 21

23 Internal wiring ................................................................................................................. 23

24 Components ................................................................................................................... 23

25 Supply connection and external flexible cords ................................................................ 23

26 Terminals for external conductors ................................................................................... 25

27 Provision for earthing ..................................................................................................... 25

28 Screws and connections ................................................................................................. 25

29 Clearances, creepage distances and solid insulation ...................................................... 25

30 Resistance to heat and fire ............................................................................................. 25

31 Resistance to rusting ...................................................................................................... 25

32 Radiation, toxicity and similar hazards ............................................................................ 25

Annexes ............................................................................................................................... 29

Annex AA (informative) Emission of acoustical noise ........................................................... 30

Annex BB (informative) Emission of vibration ....................................................................... 33

Bibliography .......................................................................................................................... 34

---------------------- Page: 4 ----------------------
60335-2-68 © IEC:2012 – 3 –

Figure 101 – Impact test apparatus ....................................................................................... 26

Figure 102 – Apparatus for testing the abrasion resistance of current-carrying hoses .......... 27

Figure 103 – Apparatus for testing the resistance to flexing of current-carrying hoses ......... 27

Figure 104 – Configuration of the hose for the freezing treatment ........................................ 28

Figure 105 – Flexing positions for the hose after removal from the freezing cabinet ............. 28

Figure AA.1 – Machine with cleaning head connected by hose and connecting tube ............ 32

Table 12 – Pull force and torque ........................................................................................... 24

---------------------- Page: 5 ----------------------
– 4 – 60335-2-68 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-68: Particular requirements for spray
extraction 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

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

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

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

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 60335-2-68 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

Amendments 1 (2005) and 2 (2007). It constitutes a technical revision.

The principal changes in this edition as compared with the third edition of IEC 60335-2-68 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;

---------------------- Page: 6 ----------------------
60335-2-68 © 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 has been made to Clauses 15, 22 and 25;
– the markings and instructions (Clause 7) have been revised basically;
– a new Annex AA 'Emission of acoustical noise' was added; and
– a new Annex BB 'Emission of vibration' was added.
The text of this standard is based on the following documents:
FDIS Report on voting
61J/490/FDIS 61J/499/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 spray extraction

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.

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.
---------------------- Page: 7 ----------------------
– 6 – 60335-2-68 © IEC:2012
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.
---------------------- Page: 8 ----------------------
60335-2-68 © IEC:2012 – 7 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-68: Particular requirements for spray
extraction machines, for commercial use
1 Scope
This clause of Part 1 is replaced by the following.

This International Standard deals with the safety of electrical portable, non-self-propelled

motor-operated spray extraction machines with or without attachments and with or without

electrical heating elements, intended for commercial indoor use.

NOTE 101 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;
– rental services for those machines;
– all uses other than normal housekeeping purposes.

They are not equipped with a traction drive. The following power systems are covered:

– mains powered motors up to a rated voltage of 250 V for single-phase appliances and

480 V for other appliances,
– battery powered motors.

This standard applies to machines in which the pressure of the employed cleaning agent

does not exceed 2,5 MPa, and in which the product of the pressure (in MPa) and the flow of

cleaning agent (in litres per minute) does not exceed 100, and in which the temperature of

the cleaning agent at the spray nozzle outlet does not exceed 85 °C.
This standard does not apply to
– vacuum cleaners and water-suction cleaning appliances for household use
(IEC 60335-2-2);
– floor treatment machines for commercial use (IEC 60335-2-67, IEC 60335-2-72);
– wet and dry vacuum cleaners, including power brush, for commercial use
(IEC 60335-2-69);

– 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 to handle hazardous solvents, such as flammable or explosive liquids;

NOTE 102 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.

---------------------- Page: 9 ----------------------
– 8 – 60335-2-68 © IEC:2012
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, specified as follows:

the machine is operated with the spray extraction pump with the nozzle giving the highest

load, the vacuum motor, the device for agitating the carpet pile (if any), the cleaning agent

heater (if any) and the soiled water discharge pump (if any) all in use. Any marking of short

time intermittent operation of the pumps is observed.

The normal operation P of the vacuum motor is obtained at the following power input:

P = 0,5 (P + P )
m f i
where

is the input, in watts, when the machine has been operated for 3 min, fitted with the

nozzle and hose giving the highest input;

is the input, in watts, when the machine has been operated for 20 s with the nozzle

sealed, immediately following the 3-minute-period with the nozzle open. Any valve or

similar device used to ensure a flow of air to cool the motor in the event of a blockage

of a main air inlet is rendered ineffective.

P and P are measured with the supply voltage adjusted to rated voltage, or to a voltage

f i

equal to the mean value of the rated voltage range if the difference between the limits of the

rated voltage range does not exceed 10 % of the mean value of the range. If the difference

between the limits of the rated voltage range exceeds 10 % of the mean value, the tests are

carried out with the supply voltage set to the upper limit of the range.

The hose is laid out straight. If the machine is provided with a hose as an optional accessory,

it is operated without the hose.

Electrically driven devices for agitating the carpet, if any, are in operation but are not in

contact with the floor or any other surface or with the means used to seal the air inlet.

The adjustment of the air inlet is not altered when it is specified that the machine is operated

under normal load, irrespective of the supply voltages specified in the test. Where optional

filtration systems are supplied with the spray extraction machine, the filtration system giving

the least air resistance (maximum flow) is fitted.
---------------------- Page: 10 ----------------------
60335-2-68 © IEC:2012 – 9 –

The normal load is equal to the mean load P for the electrically driven agitating device such

as a motor driven brush is determined in accordance with the following:
– the agitating device operates on a carpet as specified in IEC 60312-1;
– the mean load P is determined when using the device in the following way:

After setting the device, the device is moved twice over a distance of 5 m in the direction

giving the highest load;

– the motor responsible for the airflow operates under the same conditions as determining

P , i. e. no airflow restrictions, and measurements are taken after 3 min;
– the device is adjusted to the carpet pile height;

– it is necessary to move the agitating device slowly across the carpet to avoid carpet

damage.
Soiled water discharge pumps, if applicable, are operated as follows.

The pump delivers a continuous flow of water without any soiled water discharge hose

attached to the soiled water outlet of the machines unless the discharge hose is permanently

attached to the machine. The vacuum motor works during the test, unless an interlock device

is provided to prevent combined operation of both motors.

Socket-outlets for accessories are loaded with a resistive load in accordance with the

marking.
3.101
cleaning agent pre-heater

electric heating element which is intended to raise the temperature of the cleaning agent to

operating temperature before the cleaning operation
3.102
cleaning agent heater

electric heater which is intended to maintain the cleaning agent at the correct temperature

for effective operation
3.103
cleaning agent
water with or without the addition of soluble or miscible detergent
3.104
spray extraction machine

machine with or without heating elements and with or without attachments, by which a

cleaning agent under pressure is sprayed into or onto the surface to be cleaned and the

remaining soiled cleaning agent is removed by suction
3.105
maximum rated operating pressure
maximum pressure generated by the pump when operated at rated voltage
3.106
water-suction cleaning machine
machine for applying and extracting a cleaning agent
3.107
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.

---------------------- Page: 11 ----------------------
– 10 – 60335-2-68 © IEC:2012
3.108
operator

person installing, operating, adjusting, cleaning, moving, or performing user maintenance on

the machine
3.109
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 formula of for dodecyl sodium sulphate is C H NaSO .

12 25 4
3.110
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 commerci
...

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