IEC 60335-2-92:2002

Household and similar electrical appliances - Safety - Part 2-92: Particular requirements for pedestrian-controlled mains-operated lawn scarifiers and aerators

Deals with the safety of pedestrian-controlled mains-operated electric lawn scarifiers and aerators. These scarifiers have rotating cutters for regenerating lawns by, for instance, combing out grass thatch and moss, or by cutting vertically into the lawn face. These scarifiers are designed primarily for home use, with a rated voltage not more than 250 V single phase. For lawnmowers, see IEC 60335-2-77; for lawn trimmers, see IEC 60335-2-91. The contents of the corrigendum of May 2003 have been included in this copy.

General Information

• Status: Published
• Publication Date: 25-Jul-2002
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 65.060.70 - Horticultural equipment
• Technical Committee: TC 116 - Safety of motor-operated electric tools
• Drafting Committee: MT 3 - TC 116/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jul-2002
• Completion Date: 26-Jul-2002

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
60335-2-92
Second edition
2002-07
Household and similar electrical appliances –
Safety –
Part 2-92:
Particular requirements for pedestrian-controlled
mains-operated lawn scarifiers and aerators
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-92:
Règles particulières pour les scarificateurs de gazon
et les aérateurs fonctionnant sur le réseau et pour
conducteur à pied
Reference number
IEC 60335-2-92:2002(E)

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INTERNATIONAL IEC
STANDARD
60335-2-92
Second edition
2002-07
Household and similar electrical appliances –
Safety –
Part 2-92:
Particular requirements for pedestrian-controlled
mains-operated lawn scarifiers and aerators
Appareils électrodomestiques et analogues –
Sécurité –
Partie 2-92:
Règles particulières pour les scarificateurs de gazon
et les aérateurs fonctionnant sur le réseau et pour
conducteur à pied
© IEC 2002 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
X
International Electrotechnical Commission
Ɇɟɠɞɭɧɚɪɨɞɧɚɹ ɗɥɟɤɬɪɨɬɟɯɧɢɱɟɫɤɚɹ Ʉɨɦɢɫɫɢɹ
For price, see current catalogue

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CONTENTS
FOREWORD . 4
INTRODUCTION .6
1 Scope . 7
2 Normative references. 7
3 Definitions . 8
4 General requirement .10
5 General conditions for the tests .10
6 Classification .10
7 Marking and instructions .11
8 Protection against access to live parts .13
9 Starting a motor-operated appliance .13
10 Power input and current.14
11 Heating.14
12 Void .14
13 Leakage current and electric strength at operating temperature .14
14 Transient overvoltages.14
15 Moisture resistance.14
16 Leakage current and electric strength .14
17 Overload protection of transformers and associated circuits.14
18 Endurance .15
19 Abnormal operation.15
20 Stability and mechanical hazards.15
21 Mechanical strength.21
22 Construction .21
23 Internal wiring.23
24 Components .23
25 Supply connection and external flexible cords.23
26 Terminals for external conductors .24
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.34
Annex AA (normative) Test enclosure construction.34
Annex BB (normative) Base for thrown object test enclosure.39
Annex CC (normative) Target panel elevation zones and recommended test report for
thrown object test.42

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60335-2-92 © IEC:2002(E) – 3 –
Bibliography.44
Figure 101 – Safety distances – Rotary appliances .26
Figure 102 – Safety distances – Other lawn scarifiers and aerators.27
Figure 103 – Foot probe.28
Figure 104 – Foot probe test .29
Figure 105 – Strength of cutting means.30
Figure 106 – Operator zone .31
Figure 107 – Use of test rod to check guarding of cylinders.32
Figure 108 – Side coverage of cylinders.32
Figure 109 –Guarding of rear discharge cylinders .32
Figure 110 – Guarding of front discharge cylinders .32
Figure 111 – Impact test fixture for handle insulation .33
Figure AA.1 – Thrown object test fixture.35
Figure AA.2 – Single spindle rotary appliances – Test enclosure.36
Figure AA.3 – Test enclosure walls and base .37
Figure AA.4 – Test fixture for corrugated fibreboard penetration test.38
Figure BB.1 – Thrown object test fixture base detail.40
Figure BB.2 – Nail plan of test fixture base .41
Table CC.1 – Recommended test data sheet.43

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-92: Particular requirements for pedestrian-controlled
mains-operated lawn scarifiers and aerators
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC subcommittee 61F:
Safety of hand-held motor-operated electric tools, of IEC technical committee 61: Safety of
household and similar electrical appliances.
This second edition cancels and replaces the first edition published in 2000. It constitutes a
technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
61F/453/FDIS 61F/474/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 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 fourth edition (2001) 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 pedestrian-controlled
mains-operated electric lawn scarifiers and aerators.

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60335-2-92 © IEC:2002(E) – 5 –
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 proper: 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.
The committee has decided that the contents of this publication will remain unchanged until
2004. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
The contents of the corrigendum of May 2003 have been included in this copy.

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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.
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.
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.
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.

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60335-2-92 © IEC:2002(E) – 7 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-92: Particular requirements for pedestrian-controlled
mains-operated lawn scarifiers and aerators
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of pedestrian-controlled mains-operated
electrical lawn scarifiers and aerators with rotating cutters for regenerating lawns by, for
instance, combing out grass thatch and moss, or by cutting vertically into the lawn face.
These scarifiers are designed primarily for use at and around the home or for similar
purposes, their rated voltage being not more than 250 V single phase.
This standard does not, in general, take into account:
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
NOTE 101 Attention is drawn to the fact that
– in many countries additional requirements are specified by the national authorities responsible for the protection
of labour.
NOTE 102 This standard does not apply to
– lawnmowers (IEC 60335-2-77);
– lawn trimmers and lawn edge trimmers (IEC 60335-2-91);
– lawn edgers, flail mowers, sickle-bar mowers or agricultural mowers.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
ISO 2758:2001, Paper – Determination of bursting strength
ISO 3411:1995, Earth-moving machinery – Human physical dimensions of operators and
minimum operator space envelope
ISO 3767-1:1998, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment – Symbols for operator controls and other displays – Part 1: Common symbols
ISO 3767-3:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment – Symbols for operator controls and other displays – Part 3: Symbols for powered
lawn and garden equipment
ISO 3864, Safety colours and safety signs
ISO 13852:1996, Safety of machinery – Safety distances to prevent danger zones being
reached by the upper limbs

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3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions: the appliance is operated at rated
voltage with the load necessary to attain rated power input
3.101
braking system
a combination of one or more brakes and related means of operation and control
3.102
catcher
a part or combination of parts which provides a means for collecting grass, thatch, moss or
other debris
3.103
control
means or device which will control the operation of the appliance or any specific operating
function thereof
3.104
cutting means
for the purposes of this standard, the mechanism used to provide the cutting action of a
scarifier or aerator
3.105
cutting means enclosure (housing)
the part of the assembly which provides the protective means around the cutting means
3.106
cutting means tip circle
the path described by the outermost point of the cutting means as it rotates about its shaft
axis.
3.107
cutting position
any setting of the cutting means designated by the manufacturer
3.108
cutting width
the width of cut measured across the cutting means at right angles to the direction of travel
and calculated from the dimensions of the cutting means or the diameter(s) of the cutting
means tip circle(s)
3.109
discharge chute
an extension of the cutting means enclosure from the discharge opening, generally used to
control the discharge of material from the cutting means
3.110
discharge opening
a gap or opening in the cutting means enclosure through which grass, thatch and moss may
be discharged

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60335-2-92 © IEC:2002(E) – 9 –
3.111
guard
a part of the appliance or component incorporated to provide protection for the operator
and/or bystander
3.112
handle
any part likely to be hand-held for guiding the appliance in normal use
3.113
hit
the test projectile passing completely through all layers of the target material
3.114
intended use
any use of the appliance which is reasonably foreseeable, as described in the user
instructions, and which is consistent with such activities as operating, starting, stopping or
connecting to (or disconnecting from) a power source
3.115
lawn aerator
a powered appliance designed for slitting the lawn surface. The appliance uses the ground to
determine the height of cut
3.116
lawn scarifier
lawn rake
an appliance where the cutting means cuts vertically into the lawn or earthface, or scratches
the surface, thereby also combing the lawn. The appliance uses the ground to determine the
height of cut
3.117
maximum operating motor speed
the highest motor speed obtainable when the motor is adjusted in accordance with the
manufacturer's specifications and/or instructions, with the cutting means engaged
3.118
operator control
any control requiring the operator’s actuation to perform specific functions
3.119
operator presence control
a control designed so that it will automatically interrupt power to a drive when the operator's
actuating force is removed
3.120
operator zone
the operator zone for persons operating a lawn scarifier or lawn aerator
3.121
parking brake
a device incorporated into the appliance which, when operated, prevents the appliance from
moving from a stationary position and remains applied without the operator present
3.122
pedestrian-controlled
ground-supported, controlled by an operator walking behind

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3.123
power source
a motor which provides mechanical energy for linear or rotational movement
3.124
rotary appliance
a scarifier/ aerator in which the cutting means rotates about an axis or axes normal to the
ground
3.125
service brake
the designated primary means for decelerating and stopping a machine from its ground travel
speed
3.126
thrown object hazard
the potential for injury caused by object(s) propelled by the moving cutting means
3.127
tine(s)
for the purposes of this standard, a term used in warnings and instructions to denote "cutting
means" (see 3.104)
3.128
traction drive
the means (system) used to transmit power from the power source to the ground drive means
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.5 Addition:
During the tests the cutting means are adjusted and lubricated in accordance with the
manufacturer's instructions specific to the test.
5.6 Addition:
Electronic speed control devices are set for the highest speed.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be either class II or class III with respect to protection against electric
shock.
Compliance is checked by inspection and by the relevant tests.

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60335-2-92 © IEC:2002(E) – 11 –
6.2 Addition:
Appliances shall be at least IPX4.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances shall be marked with their rated power input.
The substance of the following warning shall be placed in a prominent position on the
appliance. The letters, which may be in upper or lower case, shall be a minimum of 3 mm
high, in black on a yellow background. Where appropriate IEC/ISO symbols or pictograms are
available, they may be used. Markings or symbols giving cautionary information shall be
located close to the hazard.
WARNING: Switch off and remove plug from mains before adjusting, cleaning or if the
cord is entangled or damaged.
Read the instructions sheet.
Keep the supply flexible cord away from the cutting blades.
Blades continue to rotate after machine is switched off.
For rotary lawn scarifiers/lawn aerators, if applicable, an instruction that the appliance shall
not be operated without either the entire catcher or guard in place shall be fixed near the
discharge opening and the catcher adaptor, if one is used.
7.6 Addition:
NOTE 101 Information on operator symbols may be found in ISO 3767-1 and ISO 3767-3, and in ISO 3864 for
colours.
7.9 Modification:
Replace the first paragraph by the following:
Operator controls as described in 20.101.1, other than those whose purpose is obvious,
shall have the function, direction and/or method of operation clearly identified by a durable
label or mark.
7.12 Replacement:
An instruction sheet shall be supplied with the appliance.
The instructions shall include
a) those warnings required to be marked on the appliance together with further explanation,
where appropriate;
b) instructions for the proper assembly of the appliance for use, if the appliance is not
supplied in a completely assembled form;
c) for rear delivery appliances with exposed rear rollers when used without a catcher, full
eye protection shall be worn;

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d) instructions for proper adjustment of the appliance, including a warning of the danger of
rotating parts, for example,
CAUTION – Do not touch rotating parts;
e) instructions for the safe operation of the appliance, including a recommendation that the
appliance should be supplied via a residual current device (RCD) with a rated tripping
current of not more than 30 mA;
f) instructions on the operation of all controls;
g) advice on the use and type of extension cords to be used (not lighter than required in
25.7);
h) Instructions for fitting and use of attachments, if any;
i) the following information:
1) the continuous A-weighted equivalent sound pressure level at the operator's ear if over
70 dB(A), or a statement to the effect that it does not exceed 70 dB(A);
2) the peak C-weighted instantaneous sound pressure level if over 63 Pa (130 dB in
relation to 20 μPa);
3) the sound power level emitted by the tool where the equivalent continuous sound
pressure level exceeds 85 dB(A);
2
4) the weighted root mean square acceleration value if it exceeds 2,5 m/s ;
5) a statement to the effect if the weighted r.m.s acceleration value does not exceed
2
2,5 m/s ;
j) the substance of the following, where appropriate:
1) Training
– Read the instructions carefully. Be familiar with the controls and the proper use of
the appliance.
– Never allow children to use the appliance.
– Never allow people unfamiliar with these instructions to use the appliance. Local
regulations may restrict the age of the operator.
– Never operate the appliance while people, especially children, or pets are nearby.
– The operator or user is responsible for accidents or hazards occurring to other
people or their property.
2) Preparation
– While operating the appliance, always wear substantial footwear and long trousers.
– Do not operate the appliance when barefoot or wearing open sandals.
– Thoroughly inspect the area where the appliance is to be used and remove all
stones, sticks, wires, bones, and other foreign objects.
– Before using, always visually inspect to see that the rotating parts and cutter
assembly are not worn or damaged. Replace worn or damaged parts in sets to
preserve balance.
3) Operation
– Operate the appliance only in daylight or in good artificial light.
– Avoid operating the appliance in wet grass, where feasible.
– Always be sure of your footing on slopes.
– Walk, never run.
– Always work across the face of slopes, never up and down.
– Exercise extreme caution when changing direction on slopes.
– Do not operate the appliance on excessively steep slopes.

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60335-2-92 © IEC:2002(E) – 13 –
– Use extreme caution when reversing or pulling the appliance towards you.
–Stop the rotating parts if the appliance has to be tilted for transportation. Do not
operate the cutting means when crossing surfaces other than grass, and when
transporting the appliance to and from the working area.
– Never operate the appliance with defective guards or shields, or without safety
devices, for example deflectors and/or catchers in place.
– Switch on the motor according to instructions and with feet well away from rotating
parts.
– Do not tilt appliance when switching on the motor, except if the appliance has to be
tilted for starting.
...