IEC 62841-4-4:2020/AMD1:2024

IEC 62841-4-4 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Electric motor-operated hand-held tools, transportable tools and lawn and
garden machinery – Safety –
Part 4-4: Particular requirements for lawn trimmers, lawn edge trimmers, grass
trimmers, brush cutters and brush saws

Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 4-4: Exigences particulières pour les taille-gazon, les coupe bordures, les
coupe herbes, les débroussailleuses et les débroussailleuses à lame de scie
IEC 62841-4-4:2020-11/AMD1:2024-10(en-fr)

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IEC 62841-4-4 ®
Edition 1.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Electric motor-operated hand-held tools, transportable tools and lawn and

garden machinery – Safety –
Part 4-4: Particular requirements for lawn trimmers, lawn edge trimmers, grass

trimmers, brush cutters and brush saws

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

pelouses – Sécurité –
Partie 4-4: Exigences particulières pour les taille-gazon, les coupe bordures, les

coupe herbes, les débroussailleuses et les débroussailleuses à lame de scie

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20  ISBN 978-2-8322-9619-6

– 2 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS,
TRANSPORTABLE TOOLS AND LAWN AND GARDEN MACHINERY –
SAFETY –
Part 4-4: Particular requirements for lawn trimmers, lawn edge trimmers,
grass trimmers, brush cutters and brush saws

AMENDMENT 1
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights. IEC shall not be held responsible for
identifying any or all such patent rights.
Amendment 1 to IEC 62841-4-4:2020 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.

© IEC 2024
The text of this Amendment is based on the following documents:
Draft Report on voting
116/806/FDIS 116/829/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 Amendment is English.
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/publications/.
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 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, or
• revised.
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.
___________
2 Normative references
Add the following new reference:
ISO 22867:2021, Forestry and gardening machinery – Vibration test code for portable hand-
held machines with internal combustion engine – Vibration at the handles
Replace, in the existing reference ISO 22868, "2011" with "2021".
3 Terms and definitions
Add, before the addition, the following new text:
3.16 Addition:
Note 101 to entry: Interchangeable attachments such as a lower shaft assembly or an interchangeable guard are
considered not to be detachable parts.

– 4 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
8 Marking and instructions
Add, after the last dashed item of 8.2.101.2, the following new dashed items:
– " WARNING – Keep bystanders away" or one of the safety signs specified in Figure AA.7;
– safety sign W017 of ISO 7010 (2011-05) in accordance with Table 2, if applicable.
Delete Subclause 8.2.101.4.
Delete the first dashed item of 8.2.101.5.
Replace the existing text of the first dashed item of 8.2.101.6 with the following new text:
– "Wear head protection where there is a risk of falling objects" or a relevant safety sign of
ISO 7010 or the safety sign specified in Figure AA.10;
Delete Subclause 8.4.
Replace the existing modification of 8.6 with the following new text:
n maximum speed assigned by the manufacturer in accordance with 8.1
Delete 8.14.1.101, item o).
Delete 8.14.1.102, item h).
Replace the existing text of 8.14.1.102, item i), with the following new text:
i) While operating the machine, always wear non-slip and protective footwear. Do not
operate the machine when barefoot or wearing open sandals. This reduces the chance
of injury to the feet from contact with the moving cutter line or blade.
Delete 8.14.1.102, Note 104.
Delete 8.14.1.102, item j).
Delete 8.14.1.102, Note 105.
In 8.14.2 b), item 116), add "assigned by the manufacturer" after "maximum speed of the
spindle".
12 Heating
Add, after 12.2.1, the following new text:
Replacement of Table 2:
Table 2 – Maximum outside surface temperature rises
a
Parts
Temperature rise
K
External enclosure, except handles held in normal use 60
Handles, knobs, grips, and the like which, in normal use, are continuously held:
− of metal 30
− of porcelain or vitreous material
− of moulded material, rubber or wood 50

© IEC 2024
a
Parts
Temperature rise
K
Handles, knobs, grips, and the like which, in normal use, are held for short periods

only (e.g. switches):
− of metal
− of porcelain or vitreous material
− of moulded material, rubber or wood 60
a
Temperature rise limits are not applicable to the cutting means or cutting accessory drive enclosure, if it is
marked with the safety sign W017 of ISO 7010 (2011-05).

18 Abnormal operation
Table 4 – Required performance levels
In the existing text of the first row after "Overspeed prevention", under the column "Type and
purpose of SCF", add "assigned by the manufacturer" after "of maximum speed".
Delete the last row ("Prevent self-resetting as required in 23.3").
19 Mechanical hazards
In 19.101.1.3, add the following sentence after the first sentence of the second paragraph:
The guard shall cover, from above and to the operator side, the area beyond 80 % of the largest
radius of the cutting means.
Figure 107 – Minimum guard coverage, lawn trimmer (see 19.101.1)
In key item 4, replace "radius" with "largest radius".
19.101.4 Guard requirements
Replace the existing text of the first paragraph with the following new text:
The guards specified in 19.101.1 and 19.101.2 shall be
– imperforate in the area of the guard beyond 80 % of the radius of the largest cutting means
that can be used with the guard in accordance with 8.14.2 a); and
– permanently attached or secured to prevent removal without the aid of a tool, by means
such as screws, nuts or snap fits.
The guard specified in 19.101.3 shall be permanently attached or secured to prevent removal
without the aid of a tool, by means such as screws, nuts or snap fits.
19.102.1 General
Replace, in the second dashed item, "8.14.2 b) 109)" with "8.14.2 b) 6) of Part 1".
Figure 112 – Measurement of handle gripping length
In the title of Figure 112 b), delete the word "straight".
19.102.1.1 Lawn trimmers and lawn edge trimmers
In the third paragraph, replace "lawn trimmers or lawn edge trimmers" with "hand-held
trimmers".
– 6 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
19.102.1.2 Grass trimmers, brush cutters and brush saws
In the first paragraph, delete "or grasping surfaces".
In the third paragraph, replace "8.3.101" with "8.3.102".
Figure 113 – Measurement of distance between handles for grass trimmers, brush cutters
and brush saws
Replace the existing Figure 113 with the following new figure:

Key
1 centre of the handle
l distance between handles
Figure 113 – Measurement of distance between handles for
grass trimmers, brush cutters and brush saws
19.102.3 Dimensions of straight handles supported centrally (T–type)
In the title and in the first paragraph, delete "straight" before "handles".
20 Mechanical strength
In 20.3.1, delete the eighth paragraph (starting with "In addition").
Replace the existing text of the last paragraph with the following new text:
Each drop shall be conducted on a separate sample, unless a single sample can be subjected
to multiple drops without failure. If a sample has been subjected to multiple drops and fails,
then the drop in the orientation that resulted in the failure is repeated using a new sample. If
the new sample passes the test for the drop in that orientation, then the requirements for the
drop in that orientation are considered to be fulfilled. The test is continued in this manner until
all drops in each of the three orientations are completed.

© IEC 2024
In 20.5, replace the existing text of the third paragraph with the following new text:
For grass trimmers, brush cutters and brush saws, if a pliable insulation material is used
– to cover a tubular shaped metal handle, and
– is relied upon to fulfil the requirements of this subclause,
it shall be suitable for temperatures foreseen in normal use and shall have adequate
mechanical strength in order to provide insulation between the grasping area and the cutting
device. This requirement is not applicable for metal handles that are isolated by insulating
barrier(s) from accessible metal parts that can become live by the cutting device in accordance
with 21.30.
NOTE 102 Examples of pliable insulation material include foam, heat shrink and elastomeric tubing.
NOTE 103 Examples of a tubular shaped metal handle include those with a round, oval or square cross section.
21 Construction
Replace the existing text of 21.17.1 with the following new text:
21.17.1 Addition:
This subclause of Part 1 is also applicable for an operator presence sensor whose motion is
mechanically obstructed and either
– functions as a lock-off device; or
– is locked off by the lock-off device.
In 21.18.1, replace, in the first paragraph, "8.14.2 b) 109)" with "8.14.2 b) 6) of Part 1".
In 21.18.101, replace, in the penultimate paragraph, "longitudinal vertical plane" with
"surrounding surface", "8.14.2 a)" with "8.14.2 b) 6) of Part 1" and "actuate the power switch"
with "actuate the locked-off control (i.e. the power switch or the operator presence sensor,
as applicable)".
Replace the last paragraph with the following new text and figures:
With the power switch or the operator presence sensor, as applicable, in the "off" position,
the lock-off device shall not be actuated by the cylindrical face of a 25 mm diameter × 75 mm
long steel rod when applied with a force not exceeding 20 N. The axis of the rod is applied
perpendicular to the axis of the handle and is:
– first rotated around the handle, see Figure 122, and
– then applied in the direction perpendicular to the handle axis, see Figure 123,
while bridging the handle surface and surface of the lock-off device and any surface adjacent
to the lock-off device. When applying the steel rod, the circular end faces and edges shall not
be used for probing.
During the test, it shall not be possible to actuate the locked-off control by applying a force as
specified in Table 7.
– 8 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
Key
1 handle
2 handle axis
3 lock-off device
4 steel rod
5 steel rod axis
Figure 122 – Application of steel rod when rotated around the handle

Key
1 handle
2 handle axis
3 lock-off device
4 steel rod
5 steel rod axis
Figure 123 – Application of steel rod when applied in the direction
perpendicular to the handle axis

© IEC 2024
In 21.18.102, replace the existing Figure 119 with the following new figure:

Key
1 lock-off device
2 operator presence sensor
3 power switch
Figure 119 – Example of an operator presence sensor
In 21.30, replace, in the first paragraph, "brush cutters and brush saws" with "brush cutter
and brush saw", replace "8.14.2 b) 109)" with "8.14.2 b) 6) of Part 1", replace "may" with "can"
and delete the last sentence of the paragraph.
21.102 Lawn trimmer and lawn edge trimmer cutting elements
Replace the existing title with the following new title:
21.102 Lawn trimmer, lawn edge trimmer and grass trimmer distances to guard
In 21.107.1, replace the existing text of the third paragraph with the following new text:
For machines provided with an appliance inlet or a supply cord with a length between 0,2 m
and 0,5 m, a mass of (300 ± 20) g is suspended from either
– the appliance inlet; or
– the supply cord plug; or
– any supply cord retaining device in accordance with 8.14.2,
whichever is the most unfavourable.
For machines provided with a supply cord with a length not less than 6 m, the supply cord is
placed resting on the ground.
In the last dashed item of the paragraph, replace "blade" with "cutting accessory".
In 21.107.2, replace the existing text of the third paragraph with the following new text:
A mass of (300 ± 20) g is suspended from either
– the appliance inlet; or
– the supply cord plug; or
– any supply cord retaining device in accordance with 8.14.2,
whichever is the most unfavourable.

– 10 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
23 Components
Replace the existing text of 23.3 with the following new text:
23.3 This subclause of Part 1 is not applicable.
Annex I – Measurement of noise and vibration emissions
I.2 Noise test code (grade 2)
In I.2.2.4, replace the existing Table I.101 with the following new table:
Table I.101 – Co-ordinates of microphone positions
Position No. x y z
1 +0,655 r +0,655 r 1,5 m
2 −0,655 r +0,655 r 1,5 m
3 −0,655 r −0,655 r 1,5 m
4 +0,655 r −0,655 r 1,5 m
5 −0,27 r +0,65 r 0,71 r
6 +0,27 r −0,65 r 0,71 r
In I.2.3.3, replace the existing text of the fifth paragraph (starting with "For hand-held
trimmers") with the following new text:
For hand-held trimmers, grass trimmers, brush cutters and brush saws, the microphone is
positioned according to ISO 22868:2021, B.2.3.
I.2.4 Installation and mounting conditions of the power tools during noise tests
In the fourth paragraph (starting with "Except as otherwise"), replace "Clause B.2 of ISO
22868:2011" with "ISO 22868:2021, Clause B.2" and in the last sentence, replace "the length
of the rotating cutting means" with "the length of the filament line".
In the fifth paragraph, replace "B.2.1 of ISO 22868:2011" with "ISO 22868:2021, B.2.1".
I.3 Vibration
In I.3.3.2, replace the existing text with the following new text:
Addition:
For hand-held machines, the position of the transducers shall be as specified in
ISO 22867:2021, Clause B.1. The term 'throttle trigger' shall be taken to mean the power
switch.
For walk-behind machines, the transducer(s) shall be placed where an operator holds the
handle(s). The operator(s) shall be in the normal operating position. Figure I.103 gives
examples for the positions of the transducers.
Delete Figure I.102.
© IEC 2024
Annex K – Battery tools and battery packs
Add, after K.8.2, the following new subclause:
K.8.4 Replacement of the first and second paragraph of Part 1:
Markings specified in K.8.1, K.8.2 and in K.8.3 of Part 1 shall not be on a detachable part of
the machine.
Markings specified in K.8.2 shall be clearly discernible from the outside of the machine.
Markings specified in K.8.3 of Part 1 shall be visible with any separable battery pack or
detachable battery pack removed. Other markings on the machine may be visible after
removal of a cover, if necessary.
Replace the existing text of the first paragraph of K.8.14.2 b) with the following new text:
Items 102) and 115) are not applicable.
Replace the existing text of K.19.1 with the following new text:
K.19.1 Modification:
This subclause of Part 4-4 is not applicable for covers for battery(ies) or battery
compartments.
In K.20.1, add, after the third paragraph, the following new text:
Damage to the finish, small dents and cracks which do not reduce creepage distances or
clearances below the values specified in K.28.1, or small chips which do not adversely affect
protection against shock or moisture are neglected. Damage to the cutting means, cutting
means guard, cutting head, cutting accessory or cutting accessory guard, as applicable,
during the test of K.20.3.1 are ignored.
NOTE 101 The strength and rigidity of the cutting means guard and the cutting head are covered in 20.101. The
strength and rigidity of the cutting accessory guard and the cutting accessories are covered in 20.102.
If a decorative cover is backed by an inner cover, a fracture of the decorative cover is neglected
when the inner cover withstands the test after removal of the decorative cover.
Add, after the first paragraph of K 20.3, the following new paragraph:
For walk-behind trimmers, K.20.3.2 of Part 1 applies.
In K.20.3.1, delete the eleventh paragraph (starting with "In addition, grass trimmers") and
replace the existing text of the last paragraph with the following new text:
Each drop shall be conducted on a separate sample, unless a single sample can be subjected
to multiple drops without failure. If a sample has been subjected to multiple drops and fails,
then the drop in the orientation that resulted in the failure is repeated using a new sample. If
the new sample passes the test for the drop in that orientation, then the requirements for the
drop in that orientation are considered to be fulfilled. The test is continued in this manner until
all drops in each of the three orientations are completed.

– 12 – IEC 62841-4-4:2020/AMD1:2024
© IEC 2024
In K.21.107.1, replace the existing text of the fourth paragraph with the following new text:
If the machine is supplied by means of a separable battery pack, the separable battery pack
shall be positioned as it would on an operator with a height of (1 750 ± 100) mm, in accordance
with K.8.14.2 b) 301).
In K.21.107.2, replace the existing text of the third paragraph with the following new text:
If the machine is supplied by means of a separable battery pack, the separable battery pack
shall be positioned as it would on an operator with a height of (1 750 ± 100) mm, in accordance
with K.8.14.2 b) 301).
Delete Subclause K.21.302.1.
In K.21.302.2.1, replace the text of the first paragraph with the following new text:
For grass trimmers, brush cutters and brush saws with integral batteries, a disabling
device shall be provided which shall prevent operation of the cutting means or cutting
accessory when it is removed or operated. The disabling device shall not be easily overridden.
In K.24.301, replace, in the fourth, fifth and sixth paragraphs, "Table 301" with "Table 9 of
Part 1".
Delete Table 301.
Annex AA – Safety signs which may be used on machines
Replace the existing Figure AA.3 with the following new figure:

a) Safety sign illustrating – "Wear eye, ear and head protection"

IEC 62841-4-4:2020/AMD1:20
...