IEC 62841-4-1:2017/AMD1:2024

IEC 62841-4-1 ®
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 4-1: Particular requirements for chain saws

Outils électroportatifs à moteur, outils portables et machines pour jardins et
pelouses – Sécurité –
Partie 4-1: Exigences particulières pour les scies à chaîne
IEC 62841-4-1:2017-10/AMD1:2024-10(en-fr)

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IEC 62841-4-1 ®
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 4-1: Particular requirements for chain saws

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

pelouses – Sécurité –
Partie 4-1: Exigences particulières pour les scies à chaîne

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.140.20  ISBN 978-2-8322-9797-1

– 2 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC MOTOR-OPERATED HAND-HELD TOOLS, TRANSPORTABLE
TOOLS AND LAWN AND GARDEN MACHINERY – SAFETY –

Part 4-1: Particular requirements for chain 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
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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) 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
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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.
Amendment 1 to IEC 62841-4-1:2017 has been prepared by IEC technical committee 116:
Safety of motor-operated electric tools.
The text of this Amendment is based on the following documents:
Draft Report on voting
116/816/FDIS 116/837/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
© IEC 2024
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
Replace the existing reference ISO 6533:2012 with the following new reference:
ISO 6533:2020, Forestry machinery – Portable chain-saw front hand-guard – Dimensions and
clearances
Replace the existing reference ISO 7915:1991 with the following new reference:
ISO 7915:2021, Forestry machinery – Portable chain-saws – Determination of handle strength
Replace the existing reference ISO 9518 with the following new reference:
ISO 9518:2018, Forestry machinery – Portable chain-saws – Kickback test
Add the following new references:
IEC 60664-3:2016, Insulation coordination for equipment within low-voltage systems – Part 3:
Use of coating, potting or moulding for protection against pollution
ISO 37:2017, Rubber, vulcanized or thermoplastic – Determination of tensile stress-strain
properties
– 4 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
3 Terms and definitions
3.111
maximum speed
Replace the existing definition with the following new text:
highest steady-state saw chain 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 saw chain speed excludes transients such as overshoot that can occur before
attaining a steady-state condition.
5 General conditions for the tests
Delete Subclause 5.14.
Add the following new subclause:
5.15 Addition:
For tests carried out at any percentage of rated input or rated current, except for no-load, the
saw chain and the guide bar may be removed and the chain saw loaded by means of a brake.
7 Classification
Replace the existing text with the following new text:
This clause of Part 1 is applicable, except as follows:
7.2 Replacement:
Chain saws shall not be classified with a degree of protection against harmful ingress of water
higher than IPX0 according to IEC 60529:1989, IEC 60529:1989/AMD1:1999 and
IEC 60529:1989/AMD2:2013.
Compliance is checked by inspection.
8 Marking and instructions
Add the following new subclauses:
8.1 Replacement:
Chain saws shall be marked with rating information as follows:
– rated voltage(s) or rated voltage range, in volts. Machines for star-delta connection shall
be clearly marked with the two rated voltages (for example 230 Δ/ 400 Y). A machine that
complies with this standard for a voltage range, may also be marked with any single voltage
or smaller voltage range within that range;
– symbol for nature of supply, unless the rated frequency(ies) or rated frequency range is
marked. The symbol for nature of supply shall be placed next to the marking for rated
voltage;
© IEC 2024
– rated input, in watts or rated current, in amperes. The rated input or rated current to be
marked on the machine is the total maximum input or current that can be drawn from external
circuit at the same time. If a machine has alternative components which can be selected by
a control device, the rated input or rated current is that corresponding to the highest
loading possible;
– symbol for class II construction, for class II tools (machines) only.
8.1.101 Chain saws shall not be marked with an IP rating for the degree of protection against
harmful ingress of water higher than IPX0 in accordance with IEC 60529:1989,
IEC 60529:1989/AMD1:1999 and IEC 60529:1989/AMD2:2013. Chain saws may be marked
with an IP rating for the degree of protection against solid foreign objects and access to
hazardous parts in accordance with IEC 60529:1989, IEC 60529:1989/AMD1:1999 and
IEC 60529:1989/AMD2:2013.
Compliance is checked by inspection.
8.2 Replace the existing text of the third dash with the following new text:
– "Do not expose to rain" or the safety sign specified in Annex AA.
14 Moisture resistance
Add, after Clause 14, the following new subclause:
14.2 This subclause of Part 1 is not applicable.
Replace the existing text of 14.2.1 with the following new text:
14.2.1 This subclause of Part 1 is not applicable.
Add the following new subclause:
14.2.2 This subclause of Part 1 is not applicable.
14.3 Replace the existing text of 14.3 with the following new text:
14.3 to 14.5 These subclauses of Part 1 are not applicable for saw chain lubrication tanks
and lubrication systems intended for use with oil as specified in 8.14.2.
18 Abnormal operation
Add, after 18.5, the following new subclause:
18.6.1 Addition:
Components intended to discharge capacitors to comply with 21.21 and K.21.21 are only
subjected to the fault conditions a) to f) whilst connected to the mains or battery, as applicable,
and no evaluation for compliance is conducted whilst disconnected from the mains or battery,
as applicable.
– 6 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
Table 4 – Required performance levels
Replace the existing table with the following new table:
Table 4 – Required performance levels
Type and purpose of SCF Minimum Performance
Level (PL)
Power switch – prevent unwanted switch-on c
Power switch – provide desired switch-off c
Provide desired direction of rotation for cutting lengths a
≤ 300 mm
Provide desired direction of rotation for cutting lengths b
> 300 mm
Starting current limitation as in 10.2 Not an SCF
Prevent exceeding thermal limits as in 18.4 and 18.5.3 a
Manually activated chain brake function if required in b
19.107.1 for chain saws
Prevent saw chain speed from exceeding 6 m/s for chain a
saws with no chain brake, if such overspeed would cause
non-compliance with 19.107.1
Prevent exceeding the required average braking time and the a
maximum braking time in 19.107.1.2 by more than 0,03 s
Overspeed prevention for chain saws without a non- a
manually activated chain brake to prevent saw chain speed
above 18 m/s as in 19.107.2
Non-manually activated chain brake function as in 19.107.2 b
Overspeed prevention if such overspeed would cause non-
a
compliance with 19.107.4
Provide automatic lubrication of the saw chain as in 19.110 Not an SCF
Prevent exceeding the maximum run-down time in 19.112 by a
more than 1 s
Operator presence sensor as in 21.18.102 a
Lock-off function as required by 21.18.102 b
Visual or audible indicator as referenced in 21.18.102 Not an SCF
Function to fulfil the requirements of 21.21 or K.21.21 Not an SCF
Prevent self-resetting as required in 23.3 a

19 Mechanical hazards
19.104 Drive sprocket cover
Replace the first sentence with the following new text:
The drive sprocket and saw chain shall be covered to provide protection against personal
injury.
Add the following new paragraph after the first paragraph:
The chain saw shall comply with ISO 6533:2020, 7.3.

© IEC 2024
Replace the compliance paragraph with the following new text:
Compliance is checked by inspection, by measurement and by the following test.
Delete, in the last paragraph, "and saw chain" after the second "drive sprocket" and delete
"within the area of the body of the chain saw" at the end.
19.107.1.2 Replace, in the third paragraph, the last sentence with the following new text:
If no recommendations are provided, the saw chain tension shall generally be adjusted so that,
when a (0,9 ± 0,1) kg mass is hanging from the centre of the cutting length along the lower
portion of the saw chain, the gap between the saw chain side link and the guide bar is
(0,020 ± 0,003) mm per millimetre of guide bar length.
19.107.2 Replace the existing text of the last paragraph with the following new text:
Compliance is checked by inspection and by the test of ISO 13772:2009, with the power switch
in the "on" position and the chain saw disconnected from the power source. For chain saws
with the longest nominal guide bar size in accordance with 8.3 less than 500 mm, the threshold
level of chain saws for forest service with ≤ 40 cm engine displacement shall apply. For chain
saws with the longest nominal guide bar size in accordance with 8.3 of 500 mm or greater, the
threshold level of chain saws for forest service with > 40 cm engine displacement shall apply.
Measurements shall not be carried out on guide bars longer than 500 mm nominal length,
except if no guide bar below 500 mm is specified in accordance with 8.3, measurements shall
be carried out with the shortest specified guide bar only.
19.107.4 Add, after the first paragraph, the following new text:
This requirement does not apply to guide bars with a nominal cutting length of more than
630 mm.
NOTE 101 ISO 9518:2018 is not intended for testing chain saws with a cutting length in excess of 630 mm.
Replace the existing text of the last two paragraphs with the following new text:
The medium-density fibreboard (MDF) samples shall be as specified in ISO 9518:2018.
Compliance is checked by determination of the computed kickback angle or the chain stop angle
in accordance with ISO 9518:2018, except that the speed of the drive sprocket shall be in
accordance with ISO 9518:2018, Table 1 or ISO 9518:2018, Table 2. For chain saws that
exceed the speeds of ISO 9518:2018, Table 1 or ISO 9518:2018, Table 2, and where it is not
possible to control the speed, the test shall be done at the nearest speed exceeding the values
of ISO 9518:2018, Table 1 or ISO 9518:2018, Table 2.
19.112 Run down time
Replace, in the third paragraph, the last sentence with the following new text:
If no recommendations are provided, the saw chain tension shall generally be adjusted so that,
when a (0,9 ± 0,1) kg mass is hanging from the centre of the cutting length along the lower
portion of the chain, the gap between the saw chain side link and the guide bar is
(0,020 ± 0,003) mm per millimetre of guide bar length.

– 8 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
20 Mechanical strength
Replace the existing text of 20.3.1 with the following new text:
20.3.1 Replacement:
The chain saw, equipped with the longest guide bar in accordance with 8.3 and with the
lubrication tank empty, is dropped three times in total on a concrete surface from a height of
1 m. For these three drops, the sample is tested in the three most unfavourable positions with
the lowest point of the machine being 1 m above the concrete surface. Secondary impacts shall
be avoided.
NOTE A method for avoiding secondary impacts is tethering.
If attachments other than guide bars are provided as specified and mounted in accordance
with 8.14.2, the test is repeated with each attachment or combination of attachments mounted
to a separate machine sample.
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.
After the test, the lubrication tank is filled to the maximum level in accordance with 8.14.2.
It is not necessary for the chain saw to be operable after the test. If it is operable after the test,
then immediately following this test it shall be run at maximum speed at no-load for 30 s.
20.101 Handles
Replace the text of the last paragraph with the following new text:
Compliance is checked by the handle strength test of ISO 7915:2021, the test forces for a chain
saw for forest service with an electric motor shall apply.
21 Construction
21.18.102 Replace the second paragraph with the following new text:
The lock-off device shall be actuated before the power switch can enable drive to the saw
chain.
Replace the paragraph after the note (without the dashes) with the following new text:
After the power switch is released, the machine shall return to the original locked state (i.e. at
least two separate and dissimilar actions are required before drive to the cutting means or
cutting accessory is possible) within 5 s unless:
Replace the last paragraph with the following new text:

© IEC 2024
With the power switch 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 111; and
– then applied in the direction perpendicular to the handle axis, see Figure 112
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.
Add, after 21.18.102, the following new subclause:
21.35 This subclause of Part 1 is not applicable.
21.103 Spiked bumper
Replace "Chain saws may" with "Chain saws with a nominal guide bar size or size range in
accordance with 8.3 exceeding 400 mm shall".
Delete the Note.
28 Creepage distances, clearances and distances through insulation
Replace the existing text of Clause 28 with the following new text:
This clause of Part 1 is applicable, except as follows.
28.1 Replacement:
Creepage distances and clearances shall not be less than the values in millimetres shown in
Table 12. The values specified in the table do not apply to cross-over points of motor windings.
The values in Table 12 are equal or larger than the values required by IEC 60664-1, when
– an overvoltage category II;
– a material group III;
– a pollution degree 1 for parts protected against deposition of dirt and for lacquered or
enamelled windings;
– a pollution degree 3 for other parts;
– inhomogeneous electric field;
– transient overvoltages originating in the equipment not exceeding 4 000 V
are applied.
Protection against deposition of dirt may be achieved through the use of
– encapsulation with a minimum thickness of 0,5 mm; or
– protective coatings that prevent the combined deposition of fine particles and moisture on
surfaces between conductors. Requirements for these types of protective coatings are
described in IEC 60664-3; or
– enclosures that prevent the ingress of dust by means of filters or seals, provided that no
dust is generated within the enclosure itself.
NOTE 1 An example of encapsulation is potting.

– 10 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
If a resonance voltage occurs between the point where a winding and a capacitor are connected
together, and metal parts which are separated from live parts by basic insulation only, the
creepage distance and clearance shall not be less than the values specified for the value of
the voltage imposed by the resonance, these values being increased by 4 mm in the case of
reinforced insulation.
Compliance is checked by measurement.
For machines provided with an appliance inlet, the measurements are made with an appropriate
connector inserted. For other machines, they are made on the machine as delivered.
For machines provided with belts, the measurements are made with the belts in place, and the
devices intended for varying the belt tension adjusted to the most unfavourable position within
their range of adjustment, and also with the belts removed.
Movable parts are placed in the most unfavourable position; nuts and screws with non-circular
heads are assumed to be tightened in the most unfavourable position.
The clearances between terminals and accessible metal parts are also measured with the
screws or nuts unscrewed as far as possible, but the clearances shall then be not less than
50 % of the value shown in Table 12.

© IEC 2024
Table 12 – Minimum creepage distances and clearances
Dimensions in millimetres
Other machines
Class III tools
Working voltage Working Working
(machines)
≤ 130 V voltage > 130 V and voltage > 280 V and
Distances
≤ 280 V ≤ 480 V
Creepage Clear- Creepage Clear- Creepage Clear- Creepage Clear-
distance ance distance ance distance ance distance ance
Between parts of
a
different potential :
– if lacquered or
enamelled windings or
if protected against
deposition of dirt 1,0 1,0 1,0 1,0 2,0 2,0 2,0 2,0
– if not protected
against deposition of
c b b e
dirt 2,0 1,5 2,0 1,5 3,0 2,5 8,0 3,0
Between live parts and
other metal parts over
basic insulation:
– if the live parts are
lacquered or
d
enamelled windings
or if protected against
deposition of dirt – – 1,0 1,0 2,0 2,0 2,0 2,0
– if not protected
against deposition of
c c e
dirt – – 2,4 1,5 4,0 3,0 8,0 3,0
Between live parts and
other metal parts over
reinforced insulation:
– if the live parts are
lacquered or
enamelled windings or
protected against
e
deposition of dirt – – 5,0 5,0 6,0 6,0 10,0 6,0
– for other live parts
not protected against
e
deposition of dirt – – 5,0 5,0 8,0 8,0 16,0 8,0
Between metal parts
separated by
supplementary
e
insulation – – 2,5 2,5 4,0 4,0 8,0 4,0
a
The clearances specified do not apply to the air gap between the contacts of thermal controls, protective
devices, switches of micro-gap construction, and the like, or to the air gap between the current-carrying
members of such devices where the clearance varies with the movement of the contacts.
b
These creepage distances are slightly lower than suggested by IEC 60664-1. Creepage distances between
parts of different potential (functional insulation) are only associated to fire hazard, not to electric shock hazard.
As products in the scope of IEC 62841 are products supervised during normal use, lower distances are
justified.
c
These creepage distances may be reduced to values in accordance with IEC 60664-1, if the insulation parts
are of material group II or lower.
d
Windings are considered to have basic insulation if they are wrapped with tape and then impregnated, or if
they are covered with a layer of self-hardening resin, and if, after the test of 14.1, an electric strength test as
specified in Clause D.2 is withstood, the test voltage being applied between the conductors of the winding and
metal foil in contact with the surface of the insulation.
It is sufficient that the wrapping and impregnation, or the layer of self-hardening resin, cover the windings only
at places where it is not possible to obtain the creepage distance or clearance specified for lacquered or
enamelled windings.
e
These creepage distances are valid for frequencies up to 30 kHz. For higher frequencies, creepage distances
shall be in accordance with IEC 60664-4. Creepage distances and clearances can be reduced in accordance
with IEC 60664-1 if the insulation parts are of material group II or lower and/or for working voltages ≤400 V,
however they shall not be lower than the values required in the column "Working voltage > 130 V and ≤ 280 V".

– 12 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
Distances through slots or openings in external parts of insulating material are measured to
metal foil in contact with the accessible surface; the foil is pushed into corners and the like by
means of the test probe B of IEC 61032:1997, but it is not pressed into openings.
If necessary, a force is applied to any point on internal wiring and bare conductors, other than
those of heating elements, to any point on uninsulated metal capillary tubes of thermostats
and similar devices, and to the outside of metal enclosures, in an endeavour to reduce the
creepage distances and clearances while taking the measurements.
The force is applied by means of the test probe B of IEC 61032:1997, and has a value of:
– 2 N for internal wiring and bare conductors and for uninsulated capillary tubes of
thermostats and similar devices;
– 30 N for enclosures.
The way in which creepage distances and clearances are measured is indicated in Annex A.
For machines having parts with double insulation where there is no metal between basic
insulation and supplementary insulation, the measurements are made as though a metal foil
were present between the two insulations.
Means provided for fixing the machine to a support are considered to be accessible.
Creepage distances and clearances within optocouplers are not measured if the individual
insulations are adequately sealed, and if air is excluded between individual layers of the
material.
For parts of different potential, including conductive patterns on printed circuit boards, except
for external mains connection, creepage distances and clearances smaller than the minimum
values specified
– in Table 12; or
– for conductive patterns on printed circuit boards as specified below
are allowed, provided
– the requirements of Clause 18 are met if these creepage distances and clearances are
short-circuited in turn; or
– for electronic circuits, they comply with 18.6 and 18.8.
For conductive patterns on printed circuit boards, except at their edges, the minimum creepage
distances and clearances in Table 12 between parts of different potential may be reduced, as
long as the peak value of the voltage stress does not exceed:
– 150 V per mm with a minimum value of 0,2 mm, if protected against the deposition of dirt;
– 100 V per mm with a minimum value of 0,5 mm, if not protected against the deposition of
dirt.
When the limits mentioned above lead to higher values than those of Table 12, the values of
Table 12 apply.
NOTE 2 The above values are equal or larger than the values required by IEC 60664-3.
28.2 Depending on the working voltage, the distance through insulation shall be sufficient:
– for working voltages up to and including 130 V, the distance through insulation between
metal parts shall not be less than 1,0 mm, if they are separated by supplementary
insulation, and not be less than 1,5 mm, if they are separated by reinforced insulation;

© IEC 2024
– for working voltages over 130 V, the distance through insulation between metal parts shall
not be less than 1,0 mm, if they are separated by supplementary insulation, and not be
less than 2,0 mm, if they are separated by reinforced insulation;
– for all working voltages, the distance through reinforced insulation used between
enamelled or lacquered windings and accessible metal shall not be less than 1,0 mm.
The required distance through insulation may be achieved through several thicknesses of solid
insulation layers that may have intervening air between the layers such that the sum of the
thicknesses of the solid insulation equals the required thickness.
This requirement does not apply, if either a) or b) is fulfilled.
a) The insulation is applied in thin sheet form, other than mica or similar scaly material, and
consists:
– for supplementary insulation, of at least two layers, provided that any one of the layers
withstands the electric strength test prescribed for supplementary insulation;
– for reinforced insulation, of at least three layers, provided that, when any two of the
layers are placed in contact, they withstand the electric strength test prescribed for
reinforced insulation.
The test voltage is applied between the outer surfaces of the layer, or of the two layers, as
applicable.
b) The supplementary insulation or the reinforced insulation is inaccessible and meets the
following condition:
The insulation, after having been conditioned for seven days (168 h) in an oven maintained
at a temperature equal to 50 K greater than the maximum temperature rise determined
during the test of Clause 12 withstands an electric strength test as specified in Annex D,
this test being made on the insulation both at the temperature occurring in the oven, and at
approximately room temperature.
Compliance is checked by inspection and by measurement.
For optocouplers, the conditioning procedure is carried out at a temperature of 50 K in excess
of the maximum temperature rise measured on the optocoupler during the tests of Clause 12
and Clause 18, the optocoupler being operated under the most onerous conditions which occur
during these tests.
– 14 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
Figures
Add, after Figure 110, the following new figures:

Key
1 rear handle
2 rear handle axis
3 lock-off device
4 steel rod
5 steel rod axis
Figure 111 – Application of steel rod when rotated around the rear handle

Key
1 rear handle
2 rear handle axis
3 lock-off device
4 steel rod
5 steel rod axis
Figure 112 – Application of steel rod when applied in the direction
perpendicular to the rear handle axis

© IEC 2024
Annexes
Add, after the figures, the following new annex:
Annex C
(normative)
Leakage current
Addition:
C.101 Measurement of insulation touch current for battery-operated machines
The insulation touch current is measured for machines with a working voltage that is a
hazardous voltage, where there is an accessible part or surface conductively connected to
internal circuitry, other than through protective impedance.
The network used for measurement as shown in Figure C.3 of Part 1 is modified such that the
value of R is decreased to 375 Ω.
s
The test is conducted by using two foil probes connected to the inputs of the modified network
of Figure C.3 of Part 1, each of 25 mm diameter consisting of metal foil backed by foam or other
compliant medium such that the probe conforms to the contour of the surfaces being checked.
The probes are positioned where a large potential difference is likely.
In addition, the foil probing test shall be conducted between handles and grasping surfaces as
identified in 8.14.2 b) 6) of Part 1 even if there are no accessible parts or surfaces connected
to internal circuitry.
When probing batteries, the test is not conducted on terminals of detachable battery packs
or separable battery packs that comply with the contact surface and voltage limitation in
accordance with K.9.3.
The measurement circuit of Figure C.3 of Part 1 shall have a measurement accuracy of 5 %,
evaluated at d.c., 100 Hz, 1 kHz and 10 kHz.
) in mA shall be calculated dependent on the value of
The insulation touch current limit (I
limit
the conductivity or resistivity of the water used for testing, as applicable.
If the water conductivity is measured,
I = 1/25 × σ
limit
with σ being the conductivity of the water in mS/m.
If the water resistivity is measured,
I = 40 / ρ
limit
with ρ being the resistivity of the water in Ωm.
NOTE 101 The value of I is 2,0 mA if water with the highest conductivity or lowest resistivity is used for the test.
limit
Water with lower conductivity or higher resistivity will result in lower values of I .
limit
– 16 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
Annex K – Battery tools and battery packs
Add, after Clause K.1, the following new clause:
K.3 Terms and definitions
Replacement of Definition 3.63 of Part 1:
K.3.63
working voltage
voltage, without the effect of transient voltages, across any insulation or between any parts of
different potential when the machine is supplied by (a) fully charged battery(ies) and operating
at no-load, or with the machine in the "off" condition, whichever is greater
Replacement of Definition K.3.211 of Part 1:
K.3.211
hazardous voltage
voltage between parts
– for machines where use in rain, cleaning with low-pressure water and immersion in water
to a depth of up to 1 m for cleaning is permitted, having
• an average value exceeding 30 V d.c.; or
• a peak value exceeding 21,2 V when the peak-to-peak ripple exceeds 10 % of the
average value; or
– for other machines, having
• an average value exceeding 60 V d.c.; or
• a peak value exceeding 42,4 V when the peak-to-peak ripple exceeds 10 % of the
average value
Note 301 to entry: For machines classified in accordance with K.7.2 as "Use in rain is permitted", "Cleaning with
low-pressure water is permitted" or "Immersion in water to a depth of up to 1 m for cleaning is permitted", it is
assumed that the operator’s hands are wet during machine handling.
Add the following new definitions:
K.3.301
insulation touch current
current which flows through a person upon contact with accessible parts of a battery-operated
machine with a working voltage that is a hazardous voltage
K.3.302
switched circuit
circuit that is a low-power circuit when the power switch is in the "off" position
Note 301 to entry: The requirements for a low-power circuit are given in Annex H.

© IEC 2024
Add the following new subclause:
K.7.2 Chain saws shall be classified in accordance with the following categories with respect
to moisture resistance:
– exposure to rain, cleaning with water and immersion in water are not permitted; or
– one or more of the following categories:
• "Use in rain is permitted"; or
• "Cleaning with low-pressure water is permitted"; or
• "Immersion in water to a depth of up to 1 m for cleaning is permitted".
Compliance is checked by inspection and by the relevant tests, as applicable.
Add the following new subclause:
K.7.301 Detachable battery packs and separable battery packs shall be of one of the
following categories with respect to moisture resistance:
– exposure to rain, cleaning with water and immersion in water are not permitted; or
– one or more of the following categories:
• "Use in rain is permitted"; or
• "Cleaning with low pressure water is permitted"; or
• "Immersion in water to a depth of up to 1 m for cleaning is permitted".
Compliance is checked by inspection and by the relevant tests, as applicable.
Add the following new subclause:
K.8.1 This subclause of Part 4-1 is not applicable.
Add, after K.8.1, the following new subclauses:
K.8.1.101 Chain saws, detachable battery packs and separable battery packs shall not be
marked with an IPX1, IPX2, IPX3, IPX6, IPX8 or IPX9 rating.
Compliance is checked by inspection.
K.8.1.301 Chain saws shall be marked in accordance with their classification in K.7.2 as
indicated in Table K.301.
Compliance is checked by inspection.

– 18 – IEC 62841-4-1:2017/AMD1:2024
© IEC 2024
Table K.301 – Chain saw moisture resistance classification and marking
Moisture resistance Required marking Additional optional marking
classification
Exposure to rain, cleaning with In accordance with K.8.2 Markings prohibiting exposure to
water and immersion in water are rain, cleaning with water or
not permitted immersion in water are permitted.
No additional markings related to
moisture resistance classification,
including IP markings, are
permitted.
Use in rain is permitted None "OK to use in rain", the sign shown
in Annex DD, "IPX4M", or any
combination thereof.
See NOTE 301 below.
Cleaning with low-pressure water is "May wash with water as indicated IPX5S
permitted in instruction manual" or a symbol
that is described in the instruction
manual
See NOTE 302 below.
Immersion in water up to a depth of "May immerse in water to a depth IPX7S
1 m for cleaning is permitted of up to 1 m for cleaning" or a
symbol that is described in the
instruction manual
See NOTE 303 below.
NOTE 301 In Canada and the United States of America, for machines that are classified as "Use in rain is permitted"
and where it is possible to fit a manufacturer-recommended detachable battery pack or a separable battery pack
to the machine that does not fulfil the requirements of K.14.2.302.6, the additional optional marking on the machine
must be one of the following:
– "OK to use in rain only when
...