SIST EN 50144-2-13:2002

SLOVENSKI STANDARD
SIST EN 50144-2-13:2002
01-november-2002
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SIST HD 400.3L S2:1995
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Safety of hand-held electric motor operated tools -- Part 2-13: Particular requirements for
chain saws
Sicherheit handgeführter motorbetriebener Elektrowerkzeuge -- Teil 2-13: Besondere
Anforderungen für Kettensägen
Sécurité des outils électroportatifs à moteur -- Partie 2-13: Règles particulières pour les
scies à chaînes
Ta slovenski standard je istoveten z: EN 50144-2-13:2002
ICS:
25.140.20 (OHNWULþQDRURGMD Electric tools
65.060.80 Gozdarska oprema Forestry equipment
SIST EN 50144-2-13:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50144-2-13:2002

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SIST EN 50144-2-13:2002
EUROPEAN STANDARD EN 50144-2-13
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2002
ICS 25.140.20; 91.080.40 Supersedes HD 400.3L S2:1988
English version
Safety of hand-held electric motor operated tools
Part 2-13: Particular requirements for chain saws
Sécurité des outils électroportatifs Sicherheit handgeführter
à moteur motorbetriebener Elektrowerkzeuge
Partie 2-13: Règles particulières pour Teil 2-13: Besondere Anforderungen für
les scies à chaînes Kettensägen
This European Standard was approved by CENELEC on 2001-01-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any
other language made by translation under the responsibility of a CENELEC member into its own
language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50144-2-13:2002 E

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SIST EN 50144-2-13:2002
EN 50144-2-13:2002 - 2 -
Foreword
This European Standard has been prepared by Technical Committee TC 61F, Hand-held and
transportable electric motor operated tools. A first draft was submitted to the Unique Acceptance
Procedure (UAP) in August 1996. A second draft was submitted to the formal vote in September
2000 and was approved by CENELEC as EN 50144-2-13 on 2001-01-01.
This European Standard supersedes HD 400.3L S2:1988.
The following dates were fixed:
- latest date by which the EN has to be implemented
at a national level by publication of an identical
national standard or by endorsement (dop) 2003-04-01
- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-01-01
This standard is divided into two parts:
Part 1: General requirements which are common to most hand-held electric motor operated tools (for
the purpose of this standard referred to simply as tools).
Part 2: Requirements for particular types of tool which either supplement or modify the requirements
given in Part 1 to account for the particular hazards and characteristics of these specific tools.
This European Standard has been prepared under a mandate given to CEN/CENELEC by the
European Commission and the European Free Trade Association and supports the essential health
and safety requirements of the Machinery Directive.
Compliance with the clauses of Part 1 together with this part 2 provides one means of conforming
with the essential health and safety requirements of the Directive.
As with any standard, technical progress will be kept under review so that any developments can be
taken into account.
CEN/TC 114 is producing standards for petrol engined chain saws (EN 608).
Warning: Other requirements and other EC Directives can be applicable to the products falling
within the scope of this standard.
This standard follows the overall requirements of EN 292-1 and EN 292-2.
Subclauses, tables and figures which are additional to those in Part 1 are numbered starting from
101.
NOTE In this standard the following print types are used:
- Requirements proper;
- Test specifications;
- Explanatory matter.

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Contents
1 Scope .4
2 Definitions.4
3 General requirements.5
4 General conditions for the tests .5
5 Rating.5
6 Classification .5
7 Marking and information for use.6
8 Protection against electric shock .7
9 Starting .8
10 Input and current.8
11 Heating .8
12 Leakage current .8
13 Environmental requirements.8
14 Moisture resistance . 9
15 Insulation resistance and electric strength . 9
16 Endurance . 9
17 Abnormal operation. 9
18 Mechanical hazards .10
19 Mechanical strength .14
20 Construction.15
21 Components .16
22 Internal wiring .16
23 Supply connection and external flexible cables and cords .16
24 Terminals for external conductors.16
25 Provision for earthing .16
26 Screws and connections.16
27 Creepage distances, clearances and distances through insulation .16
28 Resistance to heat, fire and tracking.16
29 Resistance to rusting.16
30 Radiation .16
Annexes.28
Figure 101 – Usable cutting length .17
Figure 102 – Description of felling: undercutting .17
Figure 103 – Description of felling: escape routes.18
Figure 104 – Impact test apparatus .18
Figure 105 – Clearance at and below switch actuator .19
Figure 106 – Clearance behind switch actuator .19
Figure 107 – Handle clearances and dimension requirements .20
Figure 108 – Front handle clearance and distance between front and rear handle .21
Figure 109 – Dimensions and clearances of front hand guard .22
Figure 110 – Test probe .22
Figure 111 – Chain catcher .23
Figure 112 – Dynamic test of chain catcher .23
Figure 113 – Chain brake test and dynamic test of front hand guard .24
Figure 114 – Handle gripping area .25
Figure 115 – Application of loads for handle strength test.25
Figure 116 – Dynamic test of rear hand guard: principle.26
Figure 117 – Dynamic test of rear hand guard: impact point .26
Figure 118 – Accelerometer positions .27
Table 101 – Test conditions for chain saws .9
Table 102 – Clearance dimensions of handles .10
Table 103 – Dimensions and clearances in Figure 109 .11
Table 104 – Handle strength test loads .14

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SIST EN 50144-2-13:2002
EN 50144-2-13:2002 - 4 -
1 Scope
This clause of Part 1 is applicable except as follows:
1.1 Addition:
This standard applies to chain saws but does not apply to chain saws operated by two persons and to
pole cutters and pruners.
This standard does not give requirements for the design of the tool to reduce the risks arising from
noise and vibration.
2 Definitions
This clause of Part 1 is applicable except as follows:
2.2.18 Replacement:
2.2.18
normal load
load obtained when the chain saw is operated continuously, the load being such that the input, in
watts, is equal to rated input and will be measured using the rated voltage or on the upper limit of the
rated voltage range
Additional definitions:
2.101
chain saw
electric tool which is intended for cutting wood by means of the saw chain supported by a guide bar
2.102
chain brake
device for stopping or locking the saw chain operated manually or automatically when kick-back
occurs
2.103
drive sprocket
the toothed part that drives the saw chain
2.104
front handle
support handle located at or towards the front of the motor housing
2.105
guide bar
the part that supports and guides the saw chain
2.106
kickback
upward and/or backward motion of the guide bar that may occur when the nose of the saw chain,
unexpectedly contacts an object
2.107
rear handle
the support handle located at or toward the rear of the chain saw

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SIST EN 50144-2-13:2002
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2.108
saw chain
loop of chain having cutting teeth that is driven by the motor and is supported by the guide bar
2.109
spiked bumper
part fixed to the casing, parallel to the guide-bar used as a pivot whilst sawing
2.110
usable cutting length
the distance measured along the guide bar axis from the root of the spiked bumper to the tip of the
nose with the chain tension adjuster set at mid position. In the case of the chain saw fitted with a nose
guard, measured from the root of the spiked bumper to the rear edge of the nose guard (see
Figure 101)
2.111
chain catcher
device for restraining the saw chain if it breaks or derails
2.112
run down time
the elapsed time from the release of the main switch until the saw chain stops
3 General requirements
This clause of Part 1 is applicable.
4 General conditions for the tests
This clause of Part 1 is applicable except as follows:
4.2 Addition:
For the tests of Clauses 13 and 18 additional samples may be provided.
4.10 Addition:
For tests carried out at normal load, the chain and bar may be removed and the driving wheel of the
saw chain loaded by means of a brake.
5Rating
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
Modification:
Class I tools are not allowed.

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7 Marking and information of use
This clause of Part 1 is applicable except as follows:
7.1 Addition:
Chain saw shall be marked with:
- maximum cutting length, in millimetres as shown in Figure 107;
- indication of direction of rotation of the saw chain; this shall be clearly indicated by an arrow,
raised or sunk, or by any other means no less visible and indelible.
In addition, chain saws shall be marked with a warning of the following substance or symbols:
They shall be written in one of the official language(s) of the country in which the chain saw is to be
sold.
- Read the instructions
- Do not expose to rain
For splash-proof or watertight chain saws this warning need not be marked on the electric tool itself.
- Remove plug from the mains immediately if cable is damaged or cut
7.13.1 Addition:
- adjustment and correct operation of automatic and manual chain oilers;
- adjustment of chain tension and chain brake functioning;
- instructions on chain sharpening;
- kickback causes, effects and safety precaution;
- holding the saw in use, stance, access to work, cutting height;
- advice not to use the chain saw above shoulder height;
- advice on the need to hold the chain saw with both hands;

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- cutting branches, logging, supporting the log, effect of sloping ground;
- avoidance of cutting into ground, wire fences, cutting saplings, cutting prepared timber;
- felling: a short description with illustrations of safe procedures:
felling within the capabilities of the saw, undercutting to control direction of fall (see Figure 102),
preparation and use of escape routes (see Figure 103), restriction of access to danger zones, use
of wedges, reference to weather and onlookers and to local by-laws;
- advice on appropriate personal protective equipment (e.g. for head, eyes, ears, body, hands,
legs, feet).
7.13.2 Addition:
- a recommendation that the first time user should have practical instruction in the use of the
chainsaw and the protective equipment from an experienced operator and that the initial practice
should be cutting logs on a saw horse or cradle;
- recommendation for the use of a residual current device.
8 Protection against electric shock
This clause of Part 1 is applicable except as follows:
8.101 Addition:
For chain saws other than those of class III, handles shall be either of insulating material or of metal
having a fixed insulated covering complying with the requirements of 15.3 for supplementary
insulation.
The handles shall be so designed that, when held as in normal use, the risk of any part of a user's
hand coming into contact with metal parts which are in electrical contact with the saw chain is
obviated.
Compliance is checked by inspection and by the tests of 15.3, applied to the handles and carried out
after the test specified in 19.3.
Moreover the covering of insulation material of metal handles shall comply with the following test:
A sample of the covered part is conditioned at a temperature of 70 °C � 2 °C for 7 days (168 h). After
conditioning, the sample is allowed to attain approximately room temperature.
Inspection shall show
- that the covering has not shrunk to such an extent that the required insulation is no longer given
- that the covering has not peeled off, so that it may move longitudinally.
After this, the sample is maintained for 4 h at temperature of –10 °C � 2 C:
While still at this temperature, the sample is then subjected, in a device shown in Figure 104, to
impact applied by means of a weight "A" having a mass of 300 g and falling from a height of 350 mm
onto a chisel "B" of hardened steel, the edge of which is placed on the sample, as shown in
Figure 104.
One impact is applied to each place where the covering is likely to be weak or is likely to be damaged
is normal use, the distance between the points of impact being at least 10 mm.
After this test, inspection shall show that the covering has not peeled off and an electric strength test
is made between metal parts and metal foil wrapped round the covering of the handle shaft.

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SIST EN 50144-2-13:2002
EN 50144-2-13:2002 - 8 -
The test voltage of 2500 V is applied for 1 min.
During this test, no flashover or breakdown shall occur.
9Starting
This clause of Part 1 is applicable.
10 Input and current
This clause of Part 1 is applicable except as follows:
10.1 Modification:
This test is not made.
10.2 Addition:
Compliance is checked by measuring the current after the chain saw has been operating for 10 min.
11 Heating
11.5 Replacement:
The chain saw is operated for 30 min at normal load.
12 Leakage current
This clause of Part 1 is applicable.
13 Environmental requirements
This clause of Part 1 is applicable except as follows:
13.1 This subclause is not applicable.
13.
...