Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 4-7: Particular requirements for pedestrian controlled walk-behind lawn scarifiers and aerators

IEC 62841-4-7:2022 clause 1 of IEC 62841-1:2014, is applicable, except as follows:
Addition:
This document applies to pedestrian controlled walk-behind lawn scarifiers and lawn aerators which are designed for regenerating lawns by combing out materials such as grass, thatch and moss or cutting vertically into the lawn face using
metallic tines; and/or
rigid non-metallic tines  which rotate about a horizontal axis.
This document does not apply to
pedestrian controlled walk-behind lawnmowers;
towed/semi-mounted lawn scarifiers and lawn aerators;
ride-on machines;
non-powered lawn scarifiers and lawn aerators;
combustion engine powered lawn scarifiers and lawn aerators;
plug aerators (corers);
hybrid and fuel cell powered machines and associated charging systems; and
garden tractors or their attachments.

Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses - Sécurité - Partie 4-7: Exigences particulières pour les scarificateurs à gazon et les aérateurs de gazon à conducteur à pied

IEC 62841-4-7:2022, La clause 1 de la IEC 62841-1:2014 est applicable, sauf dans les cas suivants :
Addition:
Le présent document s’applique aux scarificateurs et aux aérateurs de pelouse contrôlés par les piétons qui sont conçus pour régénérer les pelouses en peignant des matériaux tels que l’herbe, le chaume et la mousse ou en coupant verticalement dans la taille de la pelouse à l’aide de
tiges métalliques; et/ou
tiges rigides non métalliques
qui tournent autour d’un axe horizontal.
Le présent document ne s’applique pas aux
tondeuses à gazon à marche contrôlées par les piétons;
scarificateurs de pelouse et aérateurs de pelouse remorqués/semi-montés;
machines autoportées;
scarificateurs de pelouse et aérateurs de pelouse non motorisés;
scarificateurs de pelouse et aérateurs de pelouse alimentés par moteur à combustion;
aérateurs de bouchon (corers);
les machines hybrides et à pile à combustible et les systèmes de charge associés; et
tracteurs de jardin ou leurs accessoires.

General Information

Status
Published
Publication Date
19-Jul-2022
Current Stage
PPUB - Publication issued
Completion Date
20-Jul-2022
Ref Project

Buy Standard

Standard
IEC 62841-4-7:2022 - Electric motor-operated hand-held tools, transportable tools and lawn and garden machinery - Safety - Part 4-7: Particular requirements for pedestrian controlled walk-behind lawn scarifiers and aerators
English and French language
187 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 62841-4-7
Edition 1.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-7: Particular requirements for pedestrian controlled walk-behind lawn
scarifiers and aerators
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 4-7: Exigences particulières pour les scarificateurs à gazon et les
aérateurs de gazon à conducteur à pied
IEC 62841-4-7:2022-07(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2022 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, 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

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni

utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et

les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

variety of criteria (reference number, text, technical publications previews. With a subscription you will always have

committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.

and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.

Recherche de publications IEC - Découvrez notre puissant moteur de recherche et consultez

webstore.iec.ch/advsearchform gratuitement tous les aperçus des publications. Avec un

La recherche avancée permet de trouver des publications IEC abonnement, vous aurez toujours accès à un contenu à jour

en utilisant différents critères (numéro de référence, texte, adapté à vos besoins.

comité d’études, …). Elle donne aussi des informations sur les

projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.
Service Clients - webstore.iec.ch/csc
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
IEC Products & Services Portal - products.iec.ch
---------------------- Page: 2 ----------------------
IEC 62841-4-7
Edition 1.0 2022-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-7: Particular requirements for pedestrian controlled walk-behind lawn
scarifiers and aerators
Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 4-7: Exigences particulières pour les scarificateurs à gazon et les
aérateurs de gazon à conducteur à pied
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.30 ISBN 978-2-8322-3961-2

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
---------------------- Page: 3 ----------------------
– 2 – IEC 62841-4-7:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

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

3 Terms and definitions ...................................................................................................... 9

4 General requirements .................................................................................................... 12

5 General conditions for the tests ..................................................................................... 12

6 Radiation, toxicity and similar hazards ........................................................................... 12

7 Classification ................................................................................................................. 12

8 Marking and instructions ................................................................................................ 13

9 Protection against access to live parts ........................................................................... 16

10 Starting ......................................................................................................................... 16

11 Input and current ........................................................................................................... 17

12 Heating .......................................................................................................................... 17

13 Resistance to heat and fire ............................................................................................ 17

14 Moisture resistance ....................................................................................................... 17

15 Resistance to rusting ..................................................................................................... 18

16 Overload protection of transformers and associated circuits .......................................... 19

17 Endurance ..................................................................................................................... 19

18 Abnormal operation ....................................................................................................... 19

19 Mechanical hazards ....................................................................................................... 20

20 Mechanical strength ...................................................................................................... 33

21 Construction .................................................................................................................. 34

22 Internal wiring ................................................................................................................ 38

23 Components .................................................................................................................. 38

24 Supply connection and external flexible cords ............................................................... 40

25 Terminals for external conductors .................................................................................. 42

26 Provision for earthing .................................................................................................... 42

27 Screws and connections ................................................................................................ 42

28 Creepage distances, clearances and distances through insulation ................................. 42

Annexes ............................................................................................................................... 47

Annex I (informative) Measurement of noise and vibration emissions ................................... 47

Annex K (normative) Battery tools and battery packs ........................................................... 56

Annex L (normative) Battery tools and battery packs provided with mains connection

or non-isolated sources ......................................................................................................... 71

Annex AA (normative) Product safety labels ........................................................................ 75

Annex BB (normative) Test surface ...................................................................................... 80

Annex CC (normative) Lawn scarifier and lawn aerator foot protection test .......................... 82

Annex DD (normative) Lawn scarifier and lawn aerator tines stopping time test ................... 85

Annex EE (informative) Example of a material and construction for fulfilling the

requirements for an artificial surface ..................................................................................... 87

Bibliography .......................................................................................................................... 89

---------------------- Page: 4 ----------------------
IEC 62841-4-7:2022 © IEC 2022 – 3 –

Figure 101 – Example of a lawn scarifier or a lawn aerator ................................................... 11

Figure 102 – Operator control zones ..................................................................................... 23

Figure 103 – Safety distances – single-axle machines .......................................................... 25

Figure 104 – Handle distance – machines with more than one axle ....................................... 26

Figure 105 – Guarding of lawn scarifier and lawn aerator tines, general ................................ 27

Figure 106 – Guarding of lawn scarifier and lawn aerator tines, side coverage ...................... 28

Figure 107 – Guarding of lawn scarifier and lawn aerator tines, rear discharge ..................... 29

Figure 108 – Guarding of lawn scarifier and lawn aerator tines, front discharge .................... 30

Figure 109 – Thrown object test rig for rear discharge lawn scarifiers and lawn aerators ...... 32

Figure 110 – Strength of tines assembly ............................................................................... 34

Figure 111 – Impact test fixture for handle insulation ............................................................ 36

Figure 112 – Test assembly for accessibility of attachment plug blades ................................ 41

Figure I.101 – Microphone positions on the hemisphere (see Table I.101) ............................ 47

Figure I.102 – Examples of positions of transducers for lawn scarifiers and lawn

aerators ................................................................................................................................ 54

Figure K.301 – Examples of separable battery pack connection points and direction of

applied force ......................................................................................................................... 65

Figure AA.1 – Product safety labels illustrating – "WARNING – Beware of thrown

objects – keep bystanders away" .......................................................................................... 75

Figure AA.2 – Product safety label illustrating – "WARNING – Keep hands and feet

away from the tines" ............................................................................................................. 76

Figure AA.3 – Product safety labels illustrating – "WARNING – Remove plug from

mains before maintenance or if cord is damaged" ................................................................. 76

Figure AA.4 – Product safety label illustrating – "WARNING – Keep the supply cord

away from the tines" ............................................................................................................. 77

Figure AA.5 – Product safety labels illustrating – "WARNING – Disconnect battery

before maintenance" ............................................................................................................. 77

Figure AA.6 – Product safety labels illustrating – "WARNING – Remove the disabling

device before maintenance" .................................................................................................. 78

Figure AA.7 – Product safety labels illustrating – "WARNING – Activate the disabling

device before maintenance" .................................................................................................. 79

Figure BB.1 – Test surface detail .......................................................................................... 80

Figure BB.2 – Example of test surface, nail plan ................................................................... 81

Figure CC.1 – Foot probe ..................................................................................................... 82

Figure CC.2 – Area to be probed for lawn scarifiers and lawn aerators ................................. 84

Figure EE.1 – Sketch of the measurement surface covered with an artificial surface ............. 88

Table 4 – Required performance levels ................................................................................. 20

Table 9 – Pull and torque value ............................................................................................ 42

Table 12 – Minimum creepage distances and clearances ...................................................... 44

Table I.101 – Co-ordinates of microphone positions .............................................................. 50

Table I.102 – Values of the constant a .................................................................................. 50

Table I.103 – Absorption coefficients .................................................................................... 50

Table 4 – Required performance levels ................................................................................. 61

Table K.301 – Pull and torque value ..................................................................................... 67

---------------------- Page: 5 ----------------------
– 4 – IEC 62841-4-7:2022 © IEC 2022
Table K.1 – Minimum creepage distances and clearances between parts of different

potential ................................................................................................................................ 69

Table K.2 – Minimum total sum of creepage distances and clearances to accessible

surfaces ................................................................................................................................ 70

---------------------- Page: 6 ----------------------
IEC 62841-4-7:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN
MACHINERY – SAFETY –
Part 4-7: Particular requirements for pedestrian controlled
walk-behind lawn scarifiers and aerators
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.

IEC 62841-4-7 has been prepared by IEC technical committee 116: Safety of motor-operated

electric tools. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
116/589/FDIS 116/621/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.
---------------------- Page: 7 ----------------------
– 6 – IEC 62841-4-7:2022 © IEC 2022

This document is to be used in conjunction with the first edition of IEC 62841-1 (2014).

This document 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

lawn scarifiers and aerators.

Where a particular subclause of IEC 62841-1 is not mentioned in this document, that subclause

applies as far as reasonable. Where this document states "addition", "modification" or

"replacement", the relevant text in IEC 62841-1 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 IEC 62841-1 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 document are numbered starting from 301.

A list of all parts in the IEC 62841 series, published 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.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document 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.
---------------------- Page: 8 ----------------------
IEC 62841-4-7:2022 © IEC 2022 – 7 –
INTRODUCTION

The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed

that compliance with this document may involve the use of a patent. IEC takes no position

concerning the evidence, validity, and scope of this patent right.

The holder of this patent right has assured IEC that s/he is willing to negotiate licences under

reasonable and non-discriminatory terms and conditions with applicants throughout the world.

In this respect, the statement of the holder of this patent right is registered with IEC. Information

may be obtained from the patent database available at http://patents.iec.ch.

Attention is drawn to the possibility that some of the elements of this document may be the

subject of patent rights other than those in the patent database. IEC shall not be held

responsible for identifying any or all such patent rights.
---------------------- Page: 9 ----------------------
– 8 – IEC 62841-4-7:2022 © IEC 2022
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN
MACHINERY – SAFETY –
Part 4-7: Particular requirements for pedestrian controlled
walk-behind lawn scarifiers and aerators
1 Scope
IEC 62841-1:2014, Clause 1 is applicable, except as follows:
Addition:

This document applies to pedestrian controlled walk-behind lawn scarifiers and lawn aerators

which are designed for regenerating lawns by combing out materials such as grass, thatch and

moss or cutting vertically into the lawn face using
– metallic tines; and/or
– rigid non-metallic tines
which rotate about a horizontal axis.
This document does not apply to
– pedestrian controlled walk-behind lawnmowers;
– towed/semi-mounted lawn scarifiers and lawn aerators;
– ride-on machines;
– non-powered lawn scarifiers and lawn aerators;
– combustion engine powered lawn scarifiers and lawn aerators;
– plug aerators (corers);
– hybrid and fuel cell powered machines and associated charging systems; and
– garden tractors or their attachments.

NOTE 101 Pedestrian controlled walk-behind lawnmowers are covered by IEC 62841-4-3.

2 Normative references
IEC 62841-1:2014, Clause 2 is applicable, except as follows:
Addition:

IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:

Use of coating, potting or moulding for protection against pollution

IEC 60664-4:2005, 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
---------------------- Page: 10 ----------------------
IEC 62841-4-7:2022 © IEC 2022 – 9 –
IEC 61672-1:2013, Electroacoustics – Sound level meters – Part 1: Specifications

IEC 62841-1:2014, Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety – Part 1: General requirements

ISO 354:2003, Acoustics – Measurement of sound absorption in a reverberation room

ISO 2758:2014, Paper – Determination of bursting strength

ISO 13857:2019, Safety of machinery – Safety distances to prevent hazard zones being

reached by upper and lower limbs
Replacement:
IEC 61058-1:2016, Switches for appliances – Part 1: General requirements

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
IEC 62841-1:2014, Clause 3 is applicable, except as follows:
Addition:
3.101
catcher

part or combination of parts, intended to be used with the lawn scarifier or lawn aerator, which

provides a means for collecting material such as grass, thatch, moss or other debris

3.102
cutting width

total width of scarification/aeration measured across the tines at 90° to the direction of travel

3.103
discharge chute

extension of the tines enclosure from the discharge opening, generally used to control the

discharge of material from the tines
3.104
discharge opening

gap or opening in the tines enclosure through which grass, thatch, moss and other debris may

be discharged
3.104.1
front discharge

discharge opening for throwing out grass, thatch and moss so that they will be collected in a

catcher which is located in front of the tines
---------------------- Page: 11 ----------------------
– 10 – IEC 62841-4-7:2022 © IEC 2022
3.104.2
rear discharge

discharge opening for throwing out grass, thatch and moss so that they will be collected in a

catcher which is located behind the tines
3.105
lawn aerator

machine equipped with a tines assembly which uses the ground to determine the depth of cut,

designed for penetrating the lawn surface
Note 101 to entry: See Figure 101.

Note 102 to entry: Lawn aerators that are designed to only make shallow cuts or slices in the soil are also known

as verticutters.
3.106
lawn scarifier

machine equipped with a tines assembly designed to scratch the surface or earth face

Note 101 to entry: See Figure 101.
Note 102 to entry: Lawn scarifiers are also known as lawn rakes and dethatchers.
3.107
maximum speed

highest steady-state tines speed attainable under all conditions of normal use, including

no-load, when adjusted in accordance with the manufacturer’s specifications and/or instructions

Note 101 to entry: The steady-state tines speed excludes transients such as overshoot that may occ

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.