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IEC 62841-4-5
Edition 1.0 2021-08
INTERNATIONAL
STANDARD
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-5: Particular requirements for grass shears
your local IEC member National Committee for further information.
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IEC 62841-4-5
Edition 1.0 2021-08
INTERNATIONAL
STANDARD
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-5: Particular requirements for grass shears
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.140.20 ISBN 978-2-8322-9807-7
– 2 – IEC 62841-4-5:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirements . 11
5 General conditions for the tests . 11
6 Radiation, toxicity and similar hazards . 12
7 Classification . 12
8 Marking and instructions . 12
9 Protection against access to live parts . 14
10 Starting . 14
11 Input and current . 14
12 Heating . 14
13 Resistance to heat and fire . 15
14 Moisture resistance . 15
15 Resistance to rusting . 15
16 Overload protection of transformers and associated circuits . 15
17 Endurance . 16
18 Abnormal operation . 16
19 Mechanical hazards . 16
20 Mechanical strength . 28
21 Construction . 35
22 Internal wiring . 38
23 Components . 38
24 Supply connection and external flexible cords . 38
25 Terminals for external conductors . 40
26 Provision for earthing . 40
27 Screws and connections . 40
28 Creepage distances, clearances and distances through insulation . 40
Annexes . 45
Annex I (informative) Measurement of noise and vibration emissions . 45
Annex K (normative) Battery tools and battery packs . 53
Annex L (normative) Battery tools and battery packs provided with mains connection
or non-isolated sources . 62
Annex AA (normative) Safety signs for safety instructions and warnings . 67
Annex BB (informative) Example of a material and construction fulfilling the
requirements for an artificial surface . 69
Bibliography . 71
Figure 101 – Cutting device with one cutter blade and shear plate . 9
Figure 102 – Cutting device with two cutter blades . 10
Figure 103 – Examples of grass shears . 11
Figure 104 – Measurement of handle dimensions . 18
Figure 105 – Measurement of handle dimensions for machines fitted with an extension
shaft . 19
Figure 106 – Minimum radial clearance around the power switch . 19
Figure 107 – Examples of handle attachment and measurement of distance for hand
protection . 22
Figure 108 – Measurement of distance for hand protection for machines with a front
hand barrier . 24
Figure 109 – Measurement of distance for hand protection for machines with bail or
closed handles or centrally supported (i.e. T-type) handles without a front hand barrier . 25
Figure 110 – Projection incorporated as an integral part of a cutter blade . 26
Figure 111 – Projection incorporated as an integral part of a shear plate . 27
Figure 112 – Projection as a separate stationary plate . 28
Figure 113 – Grass shear positions for drop test . 31
Figure 114 – Impact test apparatus for handle insulation . 33
Figure 115 – Cutting device strength test . 34
Figure 116 – Example of a lock-off device located within the gripping surface of a
handle . 37
Figure 117 – Example of an operator presence sensor. 38
Figure 118 – Test assembly for accessibility of attachment plug blades . 39
Figure I.101 – Microphone positions on the hemisphere (see Table I.101) . 45
Figure I.102 – Positions of transducers for grass shears . 51
Figure AA.1 – Safety sign illustrating – "DANGER – Keep hands away from blade". 67
Figure AA.2 – Alternative safety sign illustrating – "DANGER – Keep hands away from
blade" . 67
Figure AA.3 – Safety sign illustrating – "Do not expose to rain" . 68
Figure AA.4 – Safety sign illustrating – "Remove plug from the mains immediately if the
cable is damaged or cut" . 68
Figure AA.5 – Safety sign illustrating – "Wear ear protection" . 68
Figure BB.1 – Sketch of the measurement surface covered with an artificial surface . 70
Table 4 – Required performance levels . 16
Table 7 – Switch trigger force . 35
Table 12 – Minimum creepage distances and clearances . 42
Table I.101 – Coordinates of microphone positions . 47
Table I.102 – Absorption coefficients . 47
Table 301 – Pull and torque value . 58
Table K.1 – Minimum creepage distances and clearances between parts of different
potential . 59
Table K.2 – Minimum total sum of creepage distances and clearances to accessible
surfaces . 60
– 4 – IEC 62841-4-5:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 4-5: Particular requirements for grass shears
FOREWORD
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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,
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interested IEC National Committees.
3) IEC Publications have the form of recommen
...