IEC 62841-4-3:2020

Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 4-3: Particular requirements for pedestrian controlled walk-behind lawnmowers

IEC 62841-4-3:2020 This document applies to the design of pedestrian controlled walk-behind
- cylinder lawnmowers;
and
- rotary lawnmowers
equipped with
- metallic cutting means; and/or
- rigid non-metallic cutting means; and/or
- non-metallic cutting means with one or more cutting elements pivotally mounted on a generally circular drive unit, where these cutting elements rely on centrifugal force to achieve cutting, and have a kinetic energy for each single cutting element of greater than 10 J.
This document does not apply to
- robotic lawnmowers;
- remote-controlled lawnmowers;
- flail mowers or flail-type attachments;
- scissors type lawnmowers;
- grassland mowers;
- sickle bar mowers;
- towed/semi-mounted grass-cutting machines;
- scrub-clearing machines;
- lawn trimmers and lawn edge trimmers;
- lawn edgers;
- grass trimmers;
- brush cutters;
- brush saws;
- agricultural mowers;
- trailing seat/sulky units;
- ride-on machines;
- non-powered lawnmowers;
- combustion engine powered lawnmowers;
- hybrid and fuel cell powered machines and associated charging systems; and
- garden tractors or their attachments.
Robotic lawnmowers are covered by IEC 60335-2-107, and will be covered by a future part of IEC 62841.

Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 4-3: Exigences particulières pour tondeuses à gazon à conducteur à pied

IEC 62841-4-3:2020 Le présent document s’applique à la conception des
- tondeuses à lames hélicoïdales;
et
- tondeuses à axe vertical
à conducteur à pied équipées
- d'un organe de coupe métallique; et/ou
- d’un organe de coupe non métallique rigide; et/ou
- d’un organe de coupe non métallique avec un ou plusieurs éléments de coupe montés de façon pivotante sur une unité centrale, en général circulaire, l’action de coupe de ces éléments dépendant de la force centrifuge et l’énergie cinétique de chaque élément de coupe unique étant supérieure à 10 J.
Le présent document ne s’applique pas aux:
- tondeuses à gazon robotisées;
- tondeuses télécommandées;
- tondeuses à fléaux ou équipements à fléaux;
- tondeuses à cisailles;
- faucheuses;
- tondeuses à barre de coupe;
- tondeuses remorquées/semi-portées;
- débroussailleuses;
- coupe-gazon et coupe-bordures;
- taille-bordures;
- coupe-herbes;
- débroussailleuses;
- débroussailleuses à lame de scie;
- tondeuses agricoles;
- sièges tirés/sulkys;
- machines à conducteur porté;
- tondeuses non motorisées;
- tondeuses à gazon à moteur à combustion interne;
- machines à moteur hybride et à pile à combustible et systèmes de charge associés; et
- tracteurs de jardin ou leurs équipements.
Les tondeuses à gazon robotisées sont traitées par l’IEC 60335-2-107, et seront traitées par une future partie de l’IEC 62841.

General Information

• Status: Published
• Publication Date: 10-Nov-2020
• ICS: 65.060.70 - Horticultural equipment
• Technical Committee: TC 116 - Safety of motor-operated electric tools
• Drafting Committee: WG 10 - TC 116/WG 10
• Current Stage: PPUB - Publication issued
• Start Date: 23-Oct-2020
• Completion Date: 11-Nov-2020

Standards Content (Sample)

IEC 62841-4-3
®

Edition 1.0 2020-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-3: Particular requirements for pedestrian controlled walk-behind
lawnmowers

Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 4-3: Exigences particulières pour tondeuses à gazon à conducteur à pied

IEC 62841-4-3:2020-11(en-fr)

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---------------------- Page: 2 ----------------------
IEC 62841-4-3

®


Edition 1.0 2020-11




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety –

Part 4-3: Particular requirements for pedestrian controlled walk-behind

lawnmowers



Outils électroportatifs à moteur, outils portables et machines pour jardins et


pelouses – Sécurité –

Partie 4-3: Exigences particulières pour tondeuses à gazon à conducteur à pied












INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 65.060.70 ISBN 978-2-8322-8896-2




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

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– 2 – IEC 62841-4-3:2020 © IEC 2020
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 9
4 General requirements . 11
5 General conditions for the tests . 11
6 Radiation, toxicity and similar hazards . 11
7 Classification . 12
8 Marking and instructions . 12
9 Protection against access to live parts . 16
10 Starting . 16
11 Input and current . 16
12 Heating . 16
13 Resistance to heat and fire . 17
14 Moisture resistance . 17
15 Resistance to rusting . 18
16 Overload protection of transformers and associated circuits . 18
17 Endurance . 18
18 Abnormal operation . 19
19 Mechanical hazards . 20
20 Mechanical strength . 39
21 Construction . 41
22 Internal wiring . 46
23 Components . 46
24 Supply connection and external flexible cords . 48
25 Terminals for external conductors . 50
26 Provision for earthing . 50
27 Screws and connections . 50
28 Creepage distances, clearances and distances through insulation . 50
Annexes . 55
Annex I (informative) Measurement of noise and vibration emissions . 55
Annex K (normative) Battery tools and battery packs . 64
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 80
Annex AA (normative) Safety signs . 86
Annex BB (normative) Test enclosure . 92
Annex CC (normative) Rotary lawnmower foot protection test . 101
Annex DD (normative) Lawnmower cutting means stopping time test . 110
Annex EE (informative) Example of a material and construction for fulfilling the
requirements for an artificial surface . 112
Bibliography . 114

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IEC 62841-4-3:2020 © IEC 2020 – 3 –
Figure 101 – Operator control zones . 24
Figure 102 – Handle distance and rear cutting means enclosure for rotary lawnmowers . 27
Figure 103 – Example of design for rotary lawnmower front opening . 28
Figure 104 – Examples of front opening allowance for rotary lawnmowers . 29
Figure 105 – Obstruction test . 35
Figure 106 – Guarding of cylinder lawnmower cutting means, general . 37
Figure 107 – Guarding of cylinder lawnmower cutting means, side coverage . 37
Figure 108 – Guarding of cylinder lawnmower cutting means, free and rear discharge . 38
Figure 109 – Guarding of cylinder lawnmower cutting means, front discharge . 38
Figure 110 – Cylinder lawnmower throw line and handle distance . 39
Figure 111 – Impact test fixture for handle insulation . 42
Figure 112 – Lawnmower cutting means measurement . 46
Figure 113 – Test assembly for accessibility of attachment plug blades . 49
Figure I.101 – Microphone positions on the hemisphere (see Table I.101) . 56
Figure I.102 – Examples of positions of transducers for lawnmowers . 62
Figure K.301 – Examples of separable battery pack connection points and direction of
applied force . 74
Figure AA.1 – Safety signs illustrating – "WARNING – Beware of thrown objects – keep
bystanders away" . 86
Figure AA.2 – Safety signs illustrating – "WARNING – Remove plug from mains before
maintenance or if cord is damaged" . 87
Figure AA.3 – Safety sign illustrating – "WARNING – Keep the supply cord away from
the blades” . 87
Figure AA.4 – Safety signs illustrating – "WARNING – Keep hands and feet away from
the blades" . 88
Figure AA.5 – Safety signs illustrating – "WARNING – Disconnect battery before
maintenance" . 89
Figure AA.6 – Safety signs illustrating – "WARNING – Remove the disabling device
before maintenance" . 90
Figure AA.7 – Safety signs illustrating – "WARNING – Activate the disabling device
before maintenance" . 91
Figure AA.8 – Safety sign illustrating – "DANGER – Keep hands and feet away" . 91
Figure BB.1 – Test enclosure, construction detail . 92
Figure BB.2 – Base detail . 93
Figure BB.3 – Example of base, nail plan . 93
Figure BB.4 – Test enclosure, general view . 95
Figure BB.5 – Test enclosure, single spindle rotary lawnmower . 96
Figure BB.6 – Test enclosure, multiple spindle rotary lawnmower . 97
Figure BB.7 – Fixture for fibreboard penetration test . 99
Figure CC.1 – Foot probe . 102
Figure CC.2 – Areas to be probed for rotary lawnmowers . 104
Figure CC.3 – Area to be probed for rotary lawnmowers with movable offset handles . 105
Figure CC.4 – Area to be probed for air-cushion lawnmowers with single cutting means . 106
Figure CC.5 – Area to be probed for air-cushion lawnmowers with multiple cutting
means . 107
Figure CC.6 – Area to be probed for rotary lawnmowers with single cutting means . 108

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– 4 – IEC 62841-4-3:2020 © IEC 2020
Figure CC.7 – Area to be probed for rotary lawnmowers with multiple cutting means . 109
Figure EE.1 – Sketch of the measurement surface covered with an artificial surface . 113

Table 4 – Required performance levels . 20
Table 101 – Cutting means stopping time . 32
Table 102 – Permissible hits from thrown object test . 34
Table 9 – Pull and torque value . 50
Table 12 – Minimum creepage distances and clearances . 52
Table I.101 – Co-ordinates of microphone positions . 58
Table I.102 – Values of the constant a . 58
Table I.103 – Absorption coefficients . 59
Table 4 – Required performance levels . 69
Table 301 – Pull and torque value . 76
Table K.1 – Minimum creepage distances and clearances between parts of different
potential . 78
Table K.2 – Minimum total sum of creepage distances and clearances to accessible
surfaces . 79
Table 4 – Required performance levels . 82

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IEC 62841-4-3:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 4-3: Particular requirements for pedestrian
controlled walk-behind lawnmowers

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 62841-4-3 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
The text of this International standard is based on the following documents:
FDIS Report on voting
116/467/FDIS 116/478/RVD

Full information on the voting for the approval of this International 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.

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– 6 – IEC 62841-4-3:2020 © IEC 2020
This Part 4-3 is to be used in conjunction with the first edition of IEC 62841-1:2014.
This Part 4-3 supplements or modifies the corresponding clauses in IEC 62841-1, so as to
convert it into the IEC Standard: Particular requirements for pedestrian controlled walk-behind
lawnmowers.
Where a particular subclause of Part 1 is not mentioned in this Part 4-3, that subclause
applies as far as reasonable. Where this document states “addition”, “modification” or
“replacement”, the relevant text in Part 1 is to be adapted accordingly.
The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The terms defined in Clause 3 are printed in bold typeface.
Subclauses, notes, tables and figures which are additional to those in Part 1 are numbered
starting from 101.
Subclauses, notes, tables and figures in Annex K and Annex L which are additional to those in
the main body of this Part 4-3 are numbered starting from 301.
A list of all parts of the IEC 62841 series, under the general title: Electric motor-operated
hand-held tools, transportable tools and lawn and garden machinery – 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.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 36 months from the date of publication.

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IEC 62841-4-3:2020 © IEC 2020 – 7 –
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 4-3: Particular requirements for pedestrian
controlled walk-behind lawnmowers



1 Scope
This clause of Part 1 is applicable, except as follows:
Addition:
This document applies to the design of pedestrian controlled walk-behind
– cylinder lawnmowers;
and
– rotary lawnmowers
equipped with
– metallic cutting means; and/or
– rigid non-metallic cutting means; and/or
– non-metallic cutting means with one or more cutting elements pivotally mounted on a
generally circular drive unit, where these cutting elements rely on centrifugal force to
achieve cutting, and have a kinetic energy for each single cutting element of greater than
10 J.
NOTE 101 Machines that have non-metallic cutting means and a kinetic energy for each single cutting element
of less than or equal to 10 J are considered to be lawn trimmers.
This document does not apply to
– robotic lawnmowers;
– remote-controlled lawnmowers;
– flail mowers or flail-type attachments;
– scissors type lawnmowers;
– grassland mowers;
– sickle bar mowers;
– towed/semi-mounted grass-cutting machines;
– scrub-clearing machines;
– lawn trimmers and lawn edge trimmers;
– lawn edgers;
– grass trimmers;
– brush cutters;
– brush saws;
– agricultural mowers;
– trailing seat/sulky units;
– ride-on machines;

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– 8 – IEC 62841-4-3:2020 © IEC 2020
– non-powered lawnmowers;
– combustion engine powered lawnmowers;
– hybrid and fuel cell powered machines and associated charging systems; and
– garden tractors or their attachments.
NOTE 102 Robotic lawnmowers are covered by IEC 60335-2-107, and will be covered by a future part of
IEC 62841.
NOTE 103 Lawn trimmers and lawn edge trimmers are covered by IEC 60335-2-91.
NOTE 104 Lawn trimmers, lawn edge trimmers, grass trimmers, brush cutters and brush saws will be covered by
a future part of IEC 62841.
NOTE 105 Lawn edgers will be covered by a future part of IEC 62841.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
IEC 60664-3, Insulation coordination for equipment within low-voltage systems – Part 3: Use
of coating, potting or moulding for protection against pollution
IEC 60664-4, Insulation coordination for equipment within low-voltage systems – Part 4:
Consideration of high-frequency voltage stress
IEC 61058-2-6:2018, Switches for appliances – Part 2-6: Particular requirements for switches
used in electric motor-operated hand-held tools, transportable tools and lawn and garden
machinery
IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications
ISO 354:2003, Acoustics – Measurement of sound absorption in a reverberation room
ISO 5395-1:2013, Garden equipment – Safety requirements for combustion-engine-powered
lawnmowers – Part 1: Terminology and common tests
ISO 5395-1:2013/AMD1:2017
ISO 5395-2:2013/AMD1:2016, Garden equipment – Safety requirements for combustion-
engine-powered lawnmowers – Part 2: Pedestrian-controlled lawnmowers
ISO 5395-2:2013/AMD1:2016/AMD2:2017
ISO 13857:2019, Safety of machinery – Safety distances to prevent hazard zones being
reached by upper and lower limbs
ANSI B71.1:2017, Consumer turf care equipment – Pedestrian-controlled mowers and ride-on
mowers – Safety specifications
EN 12096, Mechanical Vibration – Declaration and Verification of Vibration Emission Values
Replacement:
IEC 61058-1:2016, Switches for appliances – Part 1: General requirements

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IEC 62841-4-3:2020 © IEC 2020 – 9 –
ISO 3744:2010, Acoustics – Determination of sound power levels and sound energy levels of
noise sources using sound pressure – Engineering methods for an essentially free field over a
reflecting plane
ISO 11201:2010, Acoustics – Noise emitted by machinery and equipment – Determination of
emission sound pressure levels at a work station and at other specified positions in an
essentially free field over a reflecting plane with negligible environmental corrections
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.101
cutter bar
stationary device used on a cylinder lawnmower to provide a shearing action in combination
with the cutting means
3.102
cutting height
shortest vertical distance between the cutting edge of the cutting means and the supporting
surface of a lawnmower
3.103
cutting means
rotating mechanism or rotating part of the lawnmower that is designed to perform the cutting
action
Note 101 to entry: Cutting
...