EN 50636-2-94:2014

Household and similar electrical appliances - Safety - Part 2-94: Particular requirements for scissors type grass shears

This clause of Part 1 is replaced by the following. This European Standard specifies safety requirements and their verification for the design and construction of electric powered hand-held scissors type grass shears with a maximum cutting width of 200 mm designed primarily for cutting grass, their rated voltage being not more than 250 V for a.c. or 75 V d.c. In this European Standard the term “machine” means “electric powered scissors type grass shear”. This European Standard does not apply to hedge trimmers as covered by EN 60745–2–15. Requirements for chargers are covered by EN 60335-2-29:2004. Requirements for batteries are covered by EN 62133:2003. EMC and environmental aspects except for noise have not been considered in this European Standard. This European Standard deals with all the significant hazards presented by hand-held scissors type grass shears when they are used as intended and under conditions of misuse which are reasonably foreseeable.

Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-94: Besondere Anforderungen für Grasscheren mit Scherblättern

Appareils électrodomestiques et analogues - Sécurité - Partie 2-94: Règles particulières pour les coupe-gazon de type ciseaux

Gospodinjski in podobni električni aparati - Varnost - 2-94. del: Posebne zahteve za škarje za travo

To točko 1. dela nadomešča naslednje besedilo.
Ta evropski standard določa varnostne zahteve in njihovo preverjanje za načrtovanje ter konstrukcijo električno gnanih prenosnih škarij za travo z največjo širino rezanja 200 mm, ki so zasnovane zlasti za rezanje trave, pri čemer njihova nazivna napetost ne sme presegati 250 V izmeničnega toka ali 75 V enosmernega toka.
V tem evropskem standardu izraz »stroj« pomeni »električno gnane prenosne škarje za travo«.
Ta evropski standard se ne uporablja za škarje za živo mejo iz standarda EN 60745-2-15.
Zahteve za polnilnike so obravnavane v standardu EN 60335-2-29:2004.
Zahteve za baterije so obravnavane v standardu EN 62133:2003.
Elektromagnetna združljivost in okoljski vidiki z izjemo hrupa niso obravnavani v tem evropskem standardu.
Ta evropski standard obravnava vsa večja tveganja, ki jih predstavljajo prenosne škarje
za travo, kadar se uporabljajo v skladu z njihovim namenom in pod pogoji razumno predvidene nepravilne
uporabe.

General Information

• Status: Published
• Publication Date: 19-Jun-2014
• Withdrawal Date: 29-Sep-2016
• ICS: 65.060.70 - Horticultural equipment
• Technical Committee: CLC/TC 116 - Safety of hand-held motor-operated electric tools
• Drafting Committee: CLC/TC 116/WG 05 - Gardening appliances
• Parallel Committee: IEC/SC 61F - IEC_SC_61F --> TC 116
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 20-Jun-2014
• Completion Date: 20-Jun-2014
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 98/37/EC - Machinery
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: SIST EN 50636-2-94:2015 - Household and similar electrical appliances - Safety -- Part 2-94: Particular requirements for scissors type grass shears

Overview

EN 50636-2-94:2014 (CLC) is the European safety standard that specifies particular requirements for electric powered hand‑held scissors type grass shears. It applies to machines designed primarily for cutting grass with a maximum cutting width of 200 mm, and rated voltages up to 250 V a.c. or 75 V d.c. This Part 2 standard is intended to be used together with EN 60335-1:2012 (General requirements for household and similar electrical appliances) and aligns with the EU Machinery Directive 2006/42/EC for essential health and safety requirements.

Key Topics

The standard supplements and modifies clauses of EN 60335-1 and addresses significant hazards specific to scissors‑type grass shears. Major technical topics include:

• Scope and definitions specific to scissors type grass shears (machine terminology, cutting width limits).
• Design and construction requirements to prevent mechanical hazards, access to live parts, and entanglement.
• Marking and instructions: mandatory labels, warnings and user information (Annex AA provides graphical symbols).
• Mechanical strength and stability tests for cutting means, handles and housings (endurance, impact and strength tests).
• Starting and stopping controls, including protection against unexpected restart.
• Electrical safety checks: leakage current, electric strength, transient overvoltages and insulation requirements.
• Battery and charger interfaces: NOTE - chargers and batteries are covered by other standards (EN 60335-2-29 for chargers, EN 62133 for batteries).
• Noise and vibration assessment (normative annexes BB and CC cover vibration and noise test codes).
• Test conditions and verification methods, including normative annexes for battery‑powered appliances and test enclosures.

Applications and Who Uses It

EN 50636-2-94 is used by:

• Manufacturers and product designers to design safe scissors type grass shears and prepare technical files for conformity assessment.
• Test laboratories and certification bodies for type testing, routine testing and verification of compliance.
• Safety engineers and compliance officers ensuring products meet EU safety requirements and support CE marking.
• Procurement specialists and retailers to specify compliant products for consumer and professional markets.
• Regulators and notified bodies assessing conformity with the Machinery Directive and relevant EU legislation.

Related Standards

Key related documents referenced for harmonized requirements:

• EN 60335-1:2012 - General safety for household appliances (Part 1)
• EN 60335-2-29 - Requirements for chargers
• EN 62133 - Requirements for batteries
• EN 60745‑2‑15 - Hedge trimmers (explicitly excluded)
• Acoustic and vibration standards: EN ISO 11201, EN ISO 3744, EN ISO 4871, and vibration measurement standards.

This standard is essential for anyone developing, testing or purchasing safe, compliant scissors‑type grass shears for the European market.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2015
*RVSRGLQMVNLLQSRGREQLHOHNWULþQLDSDUDWL9DUQRVWGHO3RVHEQH]DKWHYH
]DãNDUMH]DWUDYR
Household and similar electrical appliances - Safety -- Part 2-94: Particular requirements
for scissors type grass shears
Appareils électrodomestiques et analogues - Sécurité -- Partie 2-94: Règles particulières
pour les coupe-gazon de type ciseaux
Ta slovenski standard je istoveten z: EN 50636-2-94:2014
ICS:
13.120 Varnost na domu Domestic safety
65.060.70 Vrtnarska oprema Horticultural equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50636-2-94

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 65.060.70
English Version
Household and similar electrical appliances - Safety - Part 2-94:
Particular requirements for scissors type grass shears

Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-94: Règles particulières pour les coupe-gazon de ähnliche Zwecke - Teil 2-94: Besondere Anforderungen für
type ciseaux Grasscheren mit Scherblättern

This European Standard was approved by CENELEC on 2013-09-30. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50636-2-94:2014 E
Contents
Foreword.4
Introduction .6
1 Scope .7
2 Normative references .7
3 Terms and definitions .8
4 General requirement .9
5 General conditions for the tests .9
6 Classification .9
7 Marking and instructions . 10
8 Protection against access to live parts . 12
9 Starting of motor-operated appliances . 13
10 Power input and current . 13
11 Heating . 13
12 Void . 13
13 Leakage current and electric strength at operating temperature . 13
14 Transient overvoltages . 13
15 Moisture resistance . 13
16 Leakage current and electric strength . 13
17 Overload protection of transformers and associated circuits . 13
18 Endurance . 14
19 Abnormal operation . 14
20 Stability and mechanical hazards . 14
21 Mechanical strength . 16
22 Construction . 17
23 Internal wiring . 19
24 Components . 19
25 Supply connection and external flexible cords . 19
26 Terminals for external conductors . 20
27 Provision for earthing . 20
28 Screws and connections . 20
29 Clearances, creepage distances and solid insulation . 20
30 Resistance to heat and fire . 21
31 Resistance to rusting . 21
32 Radiation, toxicity and similar hazards . 21
Annexes . 28
Annex B (normative) Appliances powered by rechargeable batteries . 28
Annex AA (normative) Safety signs and symbols which may be used on scissors type grass
shears . 30
Annex BB (normative) Vibration . 32
Annex CC (normative) Noise test code engineering method (grade 2) . 36

– 3 – EN 50636-2-94:2014
Annex DD (informative) Example of a material and construction fulfilling the requirements for
an artificial surface (see CC.4.1) . 42
Annex EE (informative) Safety instructions . 44
Annex FF (normative) Test enclosure – Base . 46
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives . 49
Bibliography . 50
Figures
Figure 101 – Parts of cutting means (see 3.103, 3.104) – Cutting width (see 3.101) . 22
Figure 102 – Examples of grass shears (see 3.102) . 22
Figure 103 – Cutter blade extension (see 20.101) . 23
Figure 104 – Examples of compliance/non-compliance and measurement method for hand
protection (see 20.102). 24
Figure 105 – Example showing the layout for the strength test and a possible orientation for the
machine (see 21.102) . 25
Figure 106 – Cutting means strength test (see 21.103) . 26
Figure 107 – Device for impact test (see 22.35) . 27
Figure AA.1 – “Read operator’s manual” . 30
Figure AA.2 – “Do not expose to rain” . 30
Figure AA.3 – “Warning: cutting means continues to run after the motor is switched off” . 31
Figure AA.4 – Mains operated machines – “Disconnect the mains plug if the cord becomes
damaged or entangled” . 31
Figure AA.5 – “Keep bystanders away” . 31
Figure BB.1 – Examples of transducer location/orientation (handle) . 35
Figure CC.1 – Microphone positions on the hemisphere (see Table CC.1) . 37
Figure DD.1 – Sketch of the measurement surface covered with an artificial surface (not to scale). 43
Figure FF.1 – Nail plan of base . 47
Figure FF.2 – Base detail . 48
Tables
Table CC.1 – Coordinates of microphone-positions . 38
Table CC.2 – Absorption coefficients . 39

Foreword
This document (EN 50636-2-94:2014) has been prepared by CLC/TC 116 "Safety of motor-operated
electric tools".
The following dates are fixed:

(dop) 2014-12-20
• latest date by which this document has to be
implemented
at national level by publication of an identical
national standard or by endorsement
(dow) 2016-09-30
• latest date by which the national standards conflicting
with this document have to be withdrawn

– alignment to the European Machinery Directive 2006/42/EC;
– alignment to EN 60335-1:2012.
This document is to be used in conjunction with EN 60335-1:2012 “Household and similar electrical
appliances - Safety – Part 1: General requirements”.
When “Part 1” is mentioned in this standard, it refers to EN 60335-1:2012.
This document supplements or modifies the corresponding clauses in Part 1, so as to convert that
publication into the European Standard “Safety requirements for scissors type grass shears”.
Where a particular subclause of Part 1 is not mentioned in this document, that subclause applies as
far as is relevant. Where this standard states “addition”, “modification” or “replacement”, the relevant
text in Part 1 is to be adapted accordingly.
Compliance with the relevant clauses of Part 1 together with this Part 2 provides one means of
conforming to the specified essential health and safety requirements of the Directive.
This European Standard follows the overall requirements of EN ISO 12100.
Other harmonised standards referred to in this European Standard are listed in Annex ZC of Part 1
and this document. The annex lists the valid edition of those documents at the time of issue of this EN.
All references are however to be understood as references to the latest edition.
The following numbering system is used:
– subclauses that are numbered starting from 101 are additional to those in Part 1;
– additional annexes are lettered AA, BB, etc.;
NOTE In this European Standard the following print types are used:
- requirements proper: in roman type;
- test specifications: in italic type;
- explanatory matter: in smaller roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the associated
noun are also in bold.
– 5 – EN 50636-2-94:2014
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive.
For the relationship with EU Directive 2006/42/EC, see informative Annex ZZ, which is an integral part
of this document.
Warning: Other requirements arising from other EU Directives can be applicable to the products
falling within the scope of this European Standard.

Introduction
This document is a type C standard as stated in EN ISO 12100:2010.
The machinery concerned and the extent to which hazards, hazardous situations and events are
covered is as indicated in the scope of this document.
When provisions of this type C standard are different from those which are stated in type A or B
standards, the provisions of this type C standard take precedence over the other standards, for
machines which have been built and designed to the provisions of this type C standard.

– 7 – EN 50636-2-94:2014
1 Scope
This clause of Part 1 is replaced by the following.
This European Standard specifies safety requirements and their verification for the design and
construction of electric powered hand-held scissors type grass shears with a maximum cutting
width of 200 mm designed primarily for cutting grass, their rated voltage being not more than 250 V
for a.c. or 75 V d.c.
In this European Standard the term “machine” means “electric powered scissors type grass shear”.
This European Standard does not apply to hedge trimmers as covered by EN 60745–2–15.
Requirements for chargers are covered by EN 60335-2-29:2004.
Requirements for batteries are covered by EN 62133:2003.
EMC and environmental aspects except for noise have not been considered in this European
Standard.
This European Standard deals with all the significant hazards presented by hand-held scissors type
grass shears when they are used as intended and under conditions of misuse which are reasonably
foreseeable.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
1)
EN 12449:1999 , Copper and copper alloys – Seamless, round tubes for general purposes
EN 28662-1:1992, Hand-held portable power tools – Measurement of vibrations at the handle -–
Part 1: General (ISO 8662-1:1988)
EN 60320 (all parts), Appliance couplers for household and similar general purposes
(IEC 60320 (all parts))
EN 60335-1:2012, Household and similar electrical appliances – Safety – Part 1: General
requirements (IEC 60335-1:2010, mod.)
EN 62233:2008, Measurement methods for electromagnetic fields of household appliances and similar
apparatus with regard to human exposure (IEC 62233:2005, mod.)
EN ISO 354:2003, Acoustics – Measurement of sound absorption in a reverberation room
(ISO 354:2003)
EN ISO 3744:2010, Acoustics – Determination of sound power levels and sound energy levels of
noise sources using sound pressure – Engineering method for an essentially free field over a
reflecting plane (ISO 3744:2010)
EN ISO 4871:2009, Acoustics – Declaration and verification of noise emission values of machinery
and equipment (ISO 4871:1996)
1)
Superseded by EN 12449:2012.
EN 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 (ISO 11201:2010)
EN ISO 11688-1:2009, Acoustics – Recommended practice for the design of low-noise machinery and
equipment – Part 1: Planning (ISO/TR 11688-1:1995)
EN ISO 12100:2010, Safety of machinery – General principles for design – Risk assessment and risk
reduction (ISO 12100:2010)
ISO 3767-1:1998, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment – Symbols for operator controls and other displays – Part 1: Common symbols
ISO 3767-3:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment – Symbols for operator controls and other displays – Part 3: Symbols for powered lawn and
garden equipment
ISO 7000, Graphical symbols for use on equipment – Registered symbols
EN ISO 7010, Graphical symbols - Safety colours and safety signs - Registered safety signs (ISO 7010)
ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden
equipment – Safety signs and hazard pictorials – General principles
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
3.1.9
normal operation
operation of the machine under the following conditions: the machine is operated at rated voltage
with the load necessary to attain rated power input
3.5.2 Replacement:
3.5.2
hand-held machine
portable machine intended to be held in the hand during normal use, including machines which will not
maintain their operating position unless supported, possibly with an extension shaft and/or assisted
by wheel(s), skid(s) or similar
Addition:
3.101
width of cut
the effective cutting width of the cutting device measured from the inside edge of the first blade tooth
or shear plate tooth to the inside edge of the last blade tooth or shear plate tooth, whichever is the
greater (see Figure 101)
3.102
scissors type grass shears
grass-cutting machine with two blades where the one cutter blade reciprocates along a straight or
curved path (see Figure 102)
3.103
blade tooth
part of the cutter blade which is sharpened to perform the shearing action (see Figure 101)

– 9 – EN 50636-2-94:2014
3.104
cutter blade
part of the cutting means having blade teeth which cut by shearing action against the teeth of the
shear plate (see Figure 101)
3.105
cutting means
cutter blade and shear plate together with any supporting part(s), which together perform the cutting
action
3.106
cutting means control
device, activated by the operator’s hand or finger, for controlling the operation of the cutting means
3.107
no load
operation of the machine at rated voltage with the cutting means attached
3.108
extension shaft
optional shaft which is designed to be fitted to a hand-held machine to enable the operator to cut
grass while in a standing position
3.109
power switch
switch that controls the primary operating means of the machine
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
A new machine shall be used for each of the tests of Clause 21.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Mains operated machines shall be of one of the following classes with respect to protection against
electric shock:
− class II or class III.
Battery powered machines incorporating battery chargers shall be class II. Other battery-powered
machines shall be class III.
Compliance is checked by inspection and by the relevant tests.

6.2 Addition:
Class II machines shall be at least IPX4. Class III machines shall be at least IPX1.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Add the following indents:
− business name and full address of the manufacturer and, where applicable his authorized
representative;
− year of construction;
− designation of the machine,
designation of machine may be achieved by a combination of letters and/or numbers providing
that this code is explained by giving the explicit designation such as “scissors type grass shear”
etc. in the instructions supplied with the machine;
NOTE 1 An example of such code is “A123B”.
− designation of series or type,
allowing the technical identification of the product. This may be achieved by a combination of
letters and/or numbers and may be combined with the designation of machine;
NOTE 2 The term “designation of series or type” is also known as model number.
− mandatory markings;
NOTE 3 For machines and their related products intended to be put on the market in the EEA, CE-marking as defined in
the applicable European Directive(s), e.g. the Machinery Directive.
Controls which may give rise to a hazard (e.g. cutting means control in accordance with 22.40) when
operated shall be marked or so placed as to indicate clearly which part of the machine they control.
Add the following new paragraphs:
The following warnings shall be located in easily visible positions, indicating:
− Warning: Read instruction manual.
− Warning: Do not expose to rain.
− Warning: Cutting means continues to run after the motor is switched off.
− Warning: Keep bystanders away.
Mains-operated machines shall also be marked with the substance of the following:
− Disconnect the mains plug if the cord becomes damaged or entangled.
Marking giving cautionary information shall be located as close as practicable to the relevant hazard.
Such marking shall either be in one of the official languages of the country in which the machine is to
be sold or the safety signs and symbols according to Annex AA shall be used. Symbols according to
ISO 3767-1, ISO 3767-3 and/or ISO 11684 may also be used, as appropriate. Colours shall be in
accordance with ISO 3767-1 and ISO 3767-3 and/or ISO 11684 as appropriate unless the symbols are

– 11 – EN 50636-2-94:2014
cast, embossed or stamped when colours are not required. If symbols and/or safety signs are used,
their significance shall be described in the instruction manual.
7.9 Not applicable.
7.12 Replacement:
An instruction manual shall be supplied with the machine, giving operating, servicing, maintenance
and safety instructions that comply as appropriate with EN ISO 12100:2010, 6.4. The words ‘Original
instructions’ shall appear on the language version(s) verified by the manufacturer or his authorised
representative. Where no ‘Original instructions’ exist in the official language(s) of the country where
the machine is to be used, a translation into that/those language(s) shall be provided by the
manufacturer or his authorised representative or by the person bringing the machine into the language
area in question. The translations shall bear the words ‘Translation of the original instructions’, and
they shall be accompanied by a copy of the ‘Original instructions’.

This instruction manual shall include
a) a repeat of those warnings required to be marked on the machine together with further
explanation, where appropriate. Where safety signs are used in the marking on the machine, their
function shall be explained,
b) a warning to never allow children, persons with reduced physical, sensory or mental capabilities
or lack of experience and knowledge or people unfamiliar with these instructions to use the
machine, local regulations may restrict the age of the operator,
c) a warning to never operate the machine while people, especially children, or pets are nearby,
d) a general description of the machine, the intended use, instructions for the proper use of the
machine including advice on what the machine should be used for, how to use it for the intended
purpose(s) and any reasonably foreseeable misuse thereof,
e) warnings concerning ways - that experience has shown might occur - in which the machinery shall
not be used,
f) instructions for the proper assembly and disassembly of the machine for use, if the machine is not
supplied in a completely assembled form,
g) instructions for proper adjustment and any necessary user maintenance of the machine, including
timescales and a warning of the danger of moving hazardous parts,
h) instructions for the recommended replacement or repair of, or service attention to critical
components. Where parts are consumable, the part number of the spare part shall be specified,
i) instructions on the operation of all controls,
j) information how to start the machine safely,
k) instructions for the operating position and the correct and safe operation of the machine such as
moving, safe positioning, handling, clearing blockages for use, preparation, maintenance and
storage of the machine,
l) an advice not to overreach and to keep balance at all times, to always be sure of footing on slopes
and to walk, never run,
m) a warning not to touch moving hazardous parts before the machine is disconnected from the
mains and the moving hazardous parts have come to a complete stop,
n) an advice on the use, length and type of extension cords to be used (not lighter than required by
25.7),
o) information about the residual risks that remain despite the inherent safe design measures,
safeguarding and complementary protective measures adopted,
p) instructions to always wear substantial footwear and long trousers while operating the machine,
q) instructions to disconnect the supply (e.g. remove the plug from the mains or remove the disabling
device)
- whenever the machine is left by the user,

- before clearing a blockage,
- before checking, cleaning or working on the machine,
- after striking a foreign object to inspect the machine for damage,
- if the machine starts to vibrate abnormally, for immediately check,
r) instructions when, where and how to inspect the machine, the supply and extension cord for signs
of damage or ageing and, if permitted, how to make repairs,
s) a warning never to operate the machine with defective guards or shields, or without safety
devices, or if the cord is damaged or worn,
t) an advice not to connect a damaged cord to the supply or touch a damaged cord before it is
disconnected from the supply for the reason that damaged cords can lead to contact with live
parts,
u) an advice to keep extension cords away from moving hazardous parts to avoid damages to the
cords which can lead to contact with live parts,
v) the operating method to be followed in the event of accident or breakdown,
w) instructions how to disconnect the machine from the mains, if the cord becomes damaged or
entangled during use,
x) recommendations
- to connect the machine only to a supply circuit protected by a residual current device (RCD)
with a tripping current of not more than 30 mA,
- to avoid using the machine in bad weather conditions especially when there is a risk of
lightning,
y) information about airborne noise emissions of the machine according to Annex CC, this includes
- the A- weighted emission sound pressure level emitted by the machinery, where this exceeds
70 dB(A), where this level does not exceed 70 dB(A), this fact shall be indicated,
- the peak C-weighted instantaneous sound pressure value at machinery, where this exceeds
63 Pa (130 dB in relation to 20 μPa),
- the A-weighted sound power level emitted by the machinery, if the A-weighted emission sound
pressure level exceeds 80 dB(A),
- the uncertainties surrounding the determined noise emission values according to Annex CC.
z) the vibration total value to which the hands are subjected as determined according to Annex BB,
where this exceeds 2,5 m/s²; where this level does not exceed 2,5 m/s², this fact shall be
indicated:
- the uncertainty of measurement for vibration value;
- instructions how to proceed in case of abnormal vibrations;
- mass in kilograms.
NOTE Examples of safety instructions are given Annex EE.
Compliance shall be checked by inspection.
7.12.1 This clause of Part 1 is applicable.
7.12.5 to 7.12.6 These clauses of Part 1 are applicable.
8 Protection against access to live parts
This clause of Part 1 is applicable.

– 13 – EN 50636-2-94:2014
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is not applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.4 Not applicable.
11.5 Replacement:
The machine is operated in still air under normal operation conditions until a steady state is reached,
the torque being applied is measured. While the torque is maintained, the voltage is then adjusted to
0,94 times the rated voltage or 1,06 times the rated voltage, or the mean of the rated voltage
range, whichever is the most unfavourable.
11.6 Not applicable.
11.7 Replacement:
Machines are operated until steady conditions are established.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable for class II machines.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable.
16 Leakage current and electric strength
This clause of Part 1 is applicable for class II machines.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.

18 Endurance
This clause of Part 1 is not applicable to battery powered machines.
For mains operated machines this clause of Part 1 is applicable except as follows.
18.101 Machines shall be so constructed that, in normal use, there will be no electrical or mechanical
failure that might impair compliance with this European Standard. The insulation shall not be damaged
and contacts and connections shall not work loose as a result of heating, vibrations, etc.
Moreover, overload protection devices shall not operate under normal running conditions.
Compliance is checked by the test of Clause 18.102.
Immediately after the test, the machine shall withstand an electric strength test as specified
in Clause 16. Connections shall not have worked loose, and there shall be no deterioration impairing
safety in normal use.
18.102 The machine is operated with the plane of the cutting means horizontal and at no load for
15 h of operation at a voltage equal to 1,1 times rated voltage, and then for 15 h at a supply voltage
equal to 0,9 times rated voltage. The machine may be operated for a number of periods, each period
being not less than 7 h.
During this test, the machine is maintained according to the instruction manual and replacement of the
carbon brushes is allowed.
During these tests, overload protection devices shall not operate.
19 Abnormal operation
For mains operated machines this clause of Part 1 is applicable except as follows:
19.7 Not applicable.
19.9 Not applicable.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.1 Not applicable.
20.2 Replacement:
All power driven transmission parts (other than the cutting means) shall be guarded to prevent the
operator's contact with these parts.
All guards shall be either permanently attached, or secured by screws, nuts or snap fits to prevent
removal.
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Fixed guards that the user is instructed to remove for regular maintenance shall have their fixing
means retained on either the guard or the body of the machine.
Compliance to be checked by inspection.
20.101 Cutting means configuration
Cutting means shall be so constructed, that the shear plate teeth extend at least 2 mm beyond the
moving cutter teeth. The extension shall be measured for each cutter blade/shear plate tooth
combination (see Figure 103).
20.102 Hand protection
The housing shall be so constructed, that inadvertent contact of the hand holding the machine with the
cutter blade(s) shall be prevented.
This shall be achieved if the handle is so constructed that it is attached to the machine at the front of
the handle grip and the shortest distance between the front of the handle grip and the nearest root of a
cutter blade tooth is at least 120 mm (see Figure 104).
The distances shall be measured along the shortest path from the front of the handle grip to the
nearest cutting edge of a cutter blade.
Compliance shall be checked by inspection and measurement.
20.103 Noise reduction
20.103.1 Reduction at source by design and protective measures
Noise reduction shall be an integral part of the design process thus specifically taking into account
measures at source. The success of the applied noise reduction measures is assessed on the bases
of the actual noise emission values in relation to other machines of the same family. If required to be
declared, the noise test code of Annex CC shall be used for the determination of the sound power
level and of the emission sound pressure level at the operator's position. The main sources causing
noise are:
− air intake system;
− cutting system;
− vibrating surfaces.
EN ISO 11688-1:2009 gives general technical information on widely recognized technical rules and
means to be followed in the design of low-noise machines.
20.103.2 Reduction by information
After taking possible technical noise reduction at source, it is still required that, if appropriate, the
instruction manual
− recommends the use of low-noise operating modes, and/or limited time of operation,
− gives a warning of the noise level and recommends the use of ear protection.

20.104 Vibration reduction
20.104.1 Reduction by design and protective measures
The machine shall be designed to generate a vibration level as low as practicable. If required to be
declared, the vibration test code of Annex BB shall be used for the measurement of hand-arm
vibration. The main sources causing vibration are the
− oscillating forces from the motor,
− cutting means,
− unbalanced moving parts,
− impact in gears, bearings and other mechanisms,
− interaction between operator, machine and material being worked,
− machine design related to mobility,
− travelling surface, speed, tyre pressure.
NOTE 1 CR 1030-1:1995 gives general technical information on widely recognized technical rules and means to be followed in
the design of machines for low hand-arm vibration solutions.
NOTE 2 Besides the vibration reduction of the source, technical measures to isolate the vibration source from the handle may
be used, when appropriate, such as isolators and resonating masses.
20.104.2 Reduction by information
If required, after taking possible technical measures for vibration reduction, it is still recommended
that, when appropriate, the instruction manual recommends
− the use of low-vibration operating modes, and/or limited time of operation,
− the wearing of personal protection equipment (PPE).
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
21.1 Replacement of the third paragraph:
The machine is rigidly supported and three blows are applied to every point of the enclosure that is
likely to be weak.
The impact energy will be 1,0 ± 0,05 J and blows shall also be applied to handles, levers, knobs,
handle shafts and cutting elements.
21.101 General
The mechanical strength of the machine shall be adequate for normal use.
Compliance shall be checked by the tests given in Clause 21.102 and 21.103.
21.102 Strength and rigidity
One sample of the complete machine shall be dropped three times so that it falls through a vertical
distance of (900 ± 10) mm onto a smooth horizontal concrete surface in such a manner as to test the

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strength of the machine most severely (see Figure 105). Each of the three drops shall be so
conducted that the machine receives an impact in a location different from the other two.
A string can be used to suspend the machine so that the desired orientation of the machine can be
achieved. Cutting the string will allow the machine to fall in the correct orientation to test the relevant part.
No parts of the machine that are necessary for safe operation shall become detached and no visible
cracks shall have developed.
It is not necessary for the machine to be operable after the test but, if it is operable, then immediately
following this test, it shall be run at its maximum speed for 30 s and again, no parts of the machine
that are necessary for safe operation shall become detached and no visible cracks shall have
developed.
21.103 Cutting means strength and rigidity
The rigidity and mounting of the cutting means of the machine shall be capable of safely withstanding
impact with a hard object. This shall be tested by fixing the machine on a steel plate or a smooth
concrete surface in such a manner that a test piece can be easily introduced into the cutting means.
The test piece shall be a nominal 15 mm diameter copper tube, having a nominal wall thickness of
1 mm as specified in EN 12449:1999 (see Figure 106) or of other material with comparable
characteristics. The tube shall be fixed into a suitable carrying device.
The machine shall be run at maximum speed, then the tube shall be introduced into the cutting
means at a speed of 1 m/s. The machine shall continue to be run for 15 s or until the blades stop or
the tube is cut.
No part of a cutter blade or the cutting means shall become detached. Any breakage of a cutter
blade shall be considered failure of the test. Breakage of a drive shearing device or chipping of the
blade cutting edge shall not be deemed to be a test failure.
It is not necessary for the machine to be operable after the test.
22 Construction
This clause of Part 1 is applicable except as follows.
22.12 Addition:
Machines shall have at least one handle. The handle(s) shall be designed in such a way that each
one can be grasped with one hand.
The gripping length of handles shall be at least 100 mm long. On bail or closed handles (U-shaped
handles), this dimension is related to the inner width of the gripping surface. On straight handles, it is
the complete length between the housing and the end of the handle.
The gripping length of a bail or closed handle shall comprise any length that is straight or curved at a
radius of greater than 100 mm together with any blend radius but not more than 10 mm at either or
both ends of the gripping surface.
There shall be a minimum radial clearance of 25 mm around the gripping length.
If a part containing the motor complies with the dimensions above, it may be considered as a handle.

If a straight handle is supported centrally (i.e. ‘T’ type) the gripping length shall be calculated as
follows:
a) for handles with a periphery (not including the support) less than 80 mm, the gripping length is the
sum of two parts on either side of the support;
b) for handles with a periphery (not including the support) of 80 mm or more, the gripping length is
the complete length from end to end.
Where appropriate, the part of the handle containing the cutting means control shall be counted as
part of the handle gripping length. Finger grip or similar superimposed profiles shall not affect the
method of calculating handle gripping length.
Handles shall be positively locked in position. If they are adjustable in different positions, it shall not be
possible to lock them in a position which contravenes other provisions of this European Standard.
22.30 Addition:
Machines shall be constructed so as to prevent bridging of supplementary insulation and
reinforced insulation by grass cuttings or other debris.
22.35 Addition:
For class II machines, handles and operator controls which are held when operating the machine shall
either be of insulating material or covered by insulating material having a thickness of at least 1 mm, or
separated by insulation equivalent to supplementary insulation from other accessible metal parts.
Compliance is checked by inspection, by measurement and for the insulating material covering on
handles, operator controls and handle shafts, by the following tests.
A sample of the covered part is conditioned at a temperature of 70 °C ± 2 °C for seven 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 length or the
required insulation is no longer provided or that the covering has not peeled off, so that it can move
longitudinally.
After this, the sample is maintained for 4 h at a temperature of -10 °C ± 2 °C.
While still at this temperature, the sample is then subjected to impact by means of the apparatus
shown in Figure 107. The weight A having a mass of 300 g is dropped from a height of 350 mm onto
the chisel B of hardened steel, the tip of which is placed on the sample.
One impact is applied to each place where the covering is likely to be we
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