BS EN 50636-2-91:2014 BSI Standards Publication Household and similar electrical appliances — Safety Part 2-91: Particular requirements for walkbehind and hand-held lawn trimmers and lawn edge trimmers BS EN 50636-2-91:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 50636-2-91:2014 It supersedes BS EN 60335-2-91:2003 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee CPL/116, Safety of motor-operated electric tools A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 54821 ICS 65.060.70 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2014 Amendments issued since publication Date Text affected BS EN 50636-2-91:2014 EUROPEAN STANDARD EN 50636-2-91 NORME EUROPÉENNE EUROPÄISCHE NORM June 2014 ICS 65.060.70 Supersedes EN 60335-2-91:2003 English Version Household and similar electrical appliances - Safety - Part 2-91: Particular requirements for walk-behind and hand-held lawn trimmers and lawn edge trimmers Appareils électrodomestiques et analogues - Sécurité Partie 2-91: Règles particulières pour les coupe-gazon et les coupe-bordures portatifs et conducteur pied Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-91: Besondere Anforderungen für handgeführte Rasentrimmer und Rasenkantenschneider This European Standard was approved by CENELEC on 2013-09-02 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 50636-2-91:2014 E BS EN 50636-2-91:2014 EN 50636-2-91:2014 Contents -2- Page Foreword Introduction .6 Scope Normative references .7 Terms and definitions General requirement General conditions for the tests .9 Classification Marking and instructions .10 Protection against access to live parts 13 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 14 16 Leakage current and electric strength .14 17 Overload protection of transformers and associated circuits 14 18 Endurance .14 19 Abnormal operation 14 20 Stability and mechanical hazards .14 21 Mechanical strength .17 22 Construction 18 23 Internal wiring .20 24 Components 20 25 Supply connection and external flexible cords 20 26 Terminals for external conductors .21 27 Provision for earthing 21 28 Screws and connections 21 29 Clearances, creepage distances and solid insulation 21 30 Resistance to heat and fire 21 31 Resistance to rusting 21 32 Radiation, toxicity and similar hazards 22 Annexes 27 Annex B (normative) Appliances powered by rechargeable batteries 27 BS EN 50636-2-91:2014 -3- EN 50636-2-91:2014 Annex AA (normative) Safety signs and symbols which may be used on lawn trimmers and lawn edge trimmers 29 Annex BB (normative) Vibration 32 Annex CC (normative) Noise test code – Engineering method (grade 2) .37 Annex DD (informative) Example of a material and construction fulfilling the requirements for an artificial surface .43 Annex EE (informative) Safety instructions .45 Annex FF (normative) Test enclosure - Base 47 Annex ZZ (informative) Coverage of Essential Requirements of EU Directives 49 Bibliography 50 Figures Figure 101 Guard, lawn trimmer (see Clause 20.101.1) 23 Figure 103 Guard strength test (hand-held trimmers) 25 Figure 104 Cutting head strength test (see Clause 21.102) 25 Figure 105 Cutting means measurement (see Clause 22.103) 26 Figure AA.1 “Read operator’s manual” 29 Figure AA.2 “Keep bystanders away” 29 Figure AA.3 “Wear eye protection” 30 Figure AA.4 “Do not expose to rain” 30 Figure AA.5 “Disconnect the mains plug if the cord becomes damaged or entangled” 30 Figure AA.6 “Wear hearing protection” 31 Figure BB.1 Examples of transducer location/orientation (hand-held trimmers) 35 Figure BB.2 Examples of transducer location/orientation (walk-behind machines) 36 Figure CC.1 Microphone positions on the hemisphere (see Table CC.1) 38 Figure DD.1 Sketch of the measurement surface covered with an artificial surface (not to scale) 44 Figure FF.1 Nail plan of base 47 Figure FF.2 Base detail 48 Tables Table CC.1 Co-ordinates of microphone positions 39 Table CC.2 Absorption coefficients 40 BS EN 50636-2-91:2014 EN 50636-2-91:2014 -4- Foreword This document (EN 50636-2-91:2014) has been prepared by CLC/TC 116 "Safety of motor-operated electric tools" The following dates are fixed: • • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with this document have to be withdrawn (dop) 2014-12-20 (dow) 2016-09-02 This document supersedes EN 60335-2-91:2003 EN 60335-2-91:2013 includes the following significant technical changes: – rewording of some clauses; – alignment to EN 60335-1:2012; – improvement of Clause 20.102 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 walk-behind and hand-held lawn trimmers and lawn edge trimmers” Where a particular subclause of Part is not mentioned in document, that subclause applies as far as is relevant Where this standard states “addition”, “modification” or “replacement”, the relevant text in Part is to be adapted accordingly Compliance with the relevant clauses of Part together with this document 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 Warning: Other requirements arising from other EU Directives can be applicable to the products falling within the scope of this European Standard 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 When a definition concerns an adjective, the adjective and the associated noun are also in bold BS EN 50636-2-91:2014 -5- EN 50636-2-91:2014 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(s) For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this document BS EN 50636-2-91:2014 EN 50636-2-91:2014 -6- Introduction This document is a type C standard as stated in EN ISO 12100 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 BS EN 50636-2-91:2014 -7- EN 50636-2-91:2014 Scope This clause of Part is replaced by the following This European Standard specifies safety requirements and their verification for the design and construction of electric powered walk-behind and hand-held lawn trimmers and lawn edge trimmers, with cutting element(s) of non-metallic filament line or freely pivoting non-metallic cutter(s), with a kinetic energy of not more than 10 J each, used by a standing operator for cutting grass, their rated voltage being not more than 250 V for a.c or 75 V d.c NOTE 101 The method of calculating the kinetic energy for the purposes of this standard is given in 22.103 In this European Standard, hand-held and walk-behind lawn trimmers and lawn edge trimmers are referred to collectively as machine(s) This European Standard does not apply to − scissor type or lawn trimmers and lawn edge trimmers with cutting means other than those described above; − lawn trimmers and lawn edge trimmers with collecting devices; − self-propelled lawn trimmers or lawn edge trimmers; EMC and environmental aspects, except noise, have not been considered in this European Standard This European Standard does not apply to chargers as covered by EN 60335-2-29 This European Standard does not apply to batteries as covered by EN 62133 This European Standard deals with all the significant hazards presented by hand-held and walkbehind lawn trimmers and lawn edge trimmers when they are used as intended and under conditions of misuse which are reasonably foreseeable Normative references This clause of Part is applicable except as follows Addition: EN 28662-1:1992, Hand-held portable power tools Measurement of vibrations at the handle Part 1: General (ISO 8662-1:1988) EN 60068-2-75, Environmental testing Part 2-75: Tests Test Eh: Hammer tests (IEC 60068-275) EN 60320 (all parts), Appliance couplers for household and similar general purposes (IEC 60320) EN 60335-1:2012, Household and similar electrical appliances Safety Part 1: General requirements (IEC 60335-1:2010, modified) EN 62233:2008, Measurement methods for electromagnetic fields of household appliances and similar apparatus with regard to human exposure (IEC 62233:2005, modified) EN ISO 354:2003, Acoustics Measurement of sound absorption in a reverberation room (ISO 354:2003) BS EN 50636-2-91:2014 EN 50636-2-91:2014 -8- EN ISO 3744:2010, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane (ISO 3744:2010) EN ISO 3767-1:2000, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment Symbols for operator controls and other displays Part 1: Common symbols (ISO 3767-1:1998) EN ISO 3767-3, 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 3767-3) EN ISO 4871:2009, Acoustics Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996) 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 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment Safety signs and hazard pictorials General principles Terms and definitions This clause of Part is applicable except as follows 3.1.9 Replacement: 3.1.9 normal operation operation of the machine at rated voltage with the load necessary to attain rated power input 3.5.2 Replacement: 3.5.2 hand-held trimmer machine which is supported by hand, possibly assisted by wheel(s), skids or harness etc and constructed such that it cannot maintain its operating position without being held by an operator Addition: 3.101 walk-behind trimmer machine which is ground supported, controlled by an operator walking behind and constructed such that it maintains its operating position without being held by an operator BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 38 - Dimensions in m Key r radius of hemisphere Figure CC.1 Microphone positions on the hemisphere (see Table CC.1) BS EN 50636-2-91:2014 - 39 - EN 50636-2-91:2014 Table CC.1 Co-ordinates of microphone positions Position X/r y/r Z +0,7 +0,7 1,5 m –0,7 +0,7 1,5 m –0,7 –0,7 1,5 m +0,7 –0,7 1,5 m –0,27 +0,65 0,71 r +0,27 –0,65 0,71 r No NOTE Microphones numbered to are not exactly on the hemisphere but a little bit outside For the determination of the measured sound power level: Microphones shall be set at the positions specified in the table; − The area of the measurement surface to take into account is that of a hemisphere with a radius of m, so assuming that all microphones are on this hemisphere CC.3 A-weighted emission sound pressure level measurement For the measurement of the A-weighted emission sound pressure level, EN ISO 11201:2010 grade shall be used subject to the following modifications or additional requirements: − the reflecting surface shall be replaced by an artificial surface which complies with Clause CC.4.1 or by natural grass which complies with Clause CC.4.2 Reproducibility of results using natural grass is likely to be lower than that required for grade of accuracy In the case of dispute, measurements shall be carried out in the open air and on the artificial surface; − environmental conditions shall be within the limits specified by the manufacturers of the measuring equipment The ambient air temperature shall be in the range from °C to 30 °C, and the wind speed shall be less than m/s and preferably less than m/s; − the microphone shall be head mounted 200 mm ± 20 mm from the median plane of the head on the louder side and in line with the eyes The operator stands upright and looks straight ahead The operator shall wear a helmet on which the microphone may be attached The helmet shall be of a shape so that its outer edge is at least 30 mm closer to the head than the microphone The operator shall be 1,75 m ± 0,05 m tall − For walk-behind trimmers, the microphone shall be aimed with its axis of maximally flat response (as specified by the manufacturer) pointing forwards and at an angle of 45° downwards from the horizontal − For hand-held trimmers, the microphone shall be aimed with its axis of maximally flat response (as specified by the manufacturer) pointing at the front handle of the machine For the emission sound pressure level measurement, the shortest distance from an imaginary line drawn through the upper horizontal part of the front handle to the head mounted microphone shall be as close to 0,7 m as practicable When measuring the emission sound pressure level at the operator position, tests shall be repeated to attain the required grade of accuracy, and until three consecutive A-weighted results give values within not more than dB The arithmetic average of these shall be the measured A-weighted emission sound pressure level of the machine BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 40 - CC.4 Requirements for the test floor CC.4.1 Artificial surface The artificial surface shall have absorption coefficients as given in Table CC.2, measured in accordance with EN ISO 354:2003 Table CC.2 Absorption coefficients Frequencies Absorption coefficients Tolerance 125 0,1 ± 0,1 250 0,3 ± 0,1 500 0,5 ± 0,1 000 0,7 ± 0,1 000 0,8 ± 0,1 000 0,9 ± 0,1 Hz The artificial surface shall be placed on a hard, reflecting surface and have a size of at least 3,6 m x 3,6 m placed at the centre of the test environment The construction of the supporting structure shall be such that the requirements for the acoustic properties are also met with the absorptive material in place The structure shall support the operator to avoid compression of the absorbing material NOTE See Annex DD for an example of a material and construction which can be expected to fulfil these requirements CC.4.2 Natural grass The test environment shall be covered, at least for the horizontal projection of the measurement surface used, with high quality natural grass Before the measurements are taken, the grass shall be cut with a mower to a height of cut as near as possible to 30 mm The surface shall be clean of grass clippings and debris and shall be visibly free of moisture, frost or snow CC.5 Installation, mounting and operating conditions Measurements shall be carried out on a new, normal production machine featuring standard equipment as provided with the machine If the cutting means is a non-metallic filament that is fed from a coil held by the cutting head, the length of the rotating cutting means shall be adjusted to be approximately mm less than the maximum length” Automatic line feeders shall be disabled The machine shall be run until stable conditions are reached before the test is commenced All speed setting devices shall be adjusted to the highest figure For electric motors supplied from mains: − the rated voltage of the upper limit of the rated voltage range and/or frequency shall be maintained during the test at 0,98 to 1,02 times the stated values; − the supply voltage of mains powered machines is measured at the plug of the cable or cord supplied, not at the plug of any extension cable or cord For electric motors supplied from batteries: − noise measurements shall be started with fully charged batteries as specified by the User Instructions but shall not be continued when the battery voltage under load drops to lower than BS EN 50636-2-91:2014 - 41 - EN 50636-2-91:2014 0,9 times the battery voltage under load at the beginning of the measurements for lead-acid batteries, or to lower than 0,8 times for other batteries; − the battery voltage shall be measured at the battery terminals During the test, the cutting means shall be engaged and unloaded Measurements shall be made with maximum motor speed lf the machine has a governor which is below that speed, the measurement shall be made at the maximum revolution speed stipulated by the User Instructions with the cutting means engaged Adjustable handle(s) shall be set to the mid-position If a harness is provided, it shall be used during the test The machine handle(s) shall be held in the normal operating position with the plane of the cutting means parallel or perpendicular to the ground, as appropriate, at a height of 50 mm The cutting means shall be free of all obstructions A motor speed indicator shall be used to check the speed of the motor It shall have an accuracy of ± 2,5 % of the reading The indicator and its engagement with the machine shall not affect the operation during the test For the sound power level determination, the cutting device shall be above the centre of the hemisphere CC.6 Measurement uncertainty The total measurement uncertainty of the emission sound pressure level respectively sound power level is depending on the standard deviation σR0 given by the applied noise emission measurement method and the uncertainty associated with the instability of the operating and mounting conditions σomc The resulting total uncertainty is then calculated from σ tot = σR2 + σomc NOTE σ tot was formerly denoted as σR ! The upper bound value of σR0 is about 1,5 dB for a grade measurement method, assuming a noise source which emits sound without significant tones NOTE For machines with a rather constant noise emission a value of 0,5 dB for σomc can apply In other cases, e.g a large influence of the material flow into and out of the machine or material flow that varies in an unpredictable manner, it is possible that a value of dB may be more appropriate Methods to determine σomc are described in the basic measurement standards The expanded measurement uncertainty U, in decibels, shall be calculated from U = k σtot, with k the coverage factor NOTE The expanded measurement uncertainty depends on the degree of confidence that is desired For the purpose of comparing the result with a limit value, it is appropriate to apply the coverage factor for a one-sided normal distribution In that case, the coverage factor k = 1,6 corresponds to a 95 % confidence level Further information is given in EN ISO 4871:2009 Please note that the expanded measurement uncertainty U is denoted as K in EN ISO 4871:2009 NOTE The expanded measurement uncertainty as described in this International Standard does not include the standard deviation of production which is used in EN ISO 4871:2009 for the purpose of making a noise declaration for batches of machines BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 42 - CC.7 Information to be recorded and reported CC.7.1 Information to be recorded The information to be recorded covers all of the technical requirements of this noise test code Any deviations from this noise test code or from the basic standards upon which it is based are to be recorded together with the technical justification for such deviations CC.7.2 Information to be reported The information to be included in the test report is at least that which is required to prepare a noise declaration or to verify the declared values Thus as a minimum the following information shall be included: − reference to this noise test code and to the basic standards used; − description of the machine; − description of the mounting and operating conditions; − the noise emission values obtained It shall be confirmed that all requirements of the noise test code have been fulfilled, or, if this is not the case, any unfulfilled requirements shall be identified Deviations from the requirements shall be stated and technical justification for the deviations shall be given CC.8 Declaration and verification of noise emission values The declaration of the A-weighted emission sound pressure level shall be made as a dual number noise emission declaration according to EN ISO 4871:2009 It shall declare the noise emission value LpA and separately the respective uncertainty KpA The declaration of the A-weighted sound power level LWA shall be made as a single number noise emission declaration according to EN ISO 4871:2009, thus declaring the sum of LWA and the respective uncertainty KWA The noise emission values shall be rounded to the highest decibel The noise declaration shall state that the noise emission values have been obtained according to this noise test code and to the basic standards EN ISO 11201:2010 and EN ISO 3744:2010 If this statement is not true, the noise emission declaration shall indicate clearly what the deviations are from this standard and/or from the basic standards If undertaken, verification shall be done according to EN ISO 4871:2009 by using the same mounting, installation and operating conditions as those used for the initial determination of the noise emission values BS EN 50636-2-91:2014 - 43 - EN 50636-2-91:2014 Annex DD (informative) Example of a material and construction fulfilling the requirements for an artificial surface DD.1 Material Mineral fibre, 20 mm thick, having an airflow resistance of 11 kN s/m4 and a density of 25 kg/m3 DD.2 Construction As is shown in Figure DD.1, the artificial flooring of the measurement site is sub-divided into nine joint planes, each of approximately 1,20 m × 1,20 m The backing layer (a) of the construction as shown in Figure DD.1 consists of chipboard, 19 mm thick, coated with a plastics material on both sides Such boards are used, for example, for the construction of kitchen furniture The cut edges of the chipboards should be protected against moisture by applying a coat of plastic paint The outsides of the flooring are bordered by a two-legged aluminium section (d), its leg height being 20 mm Sections of this profile material are also screwed to the edges of the joint planes where they serve as spacers and attachment points On the middle joint plane on which the machine is placed during measurement as well as any other place on which the operator can get to stand on, aluminium T-sections (c) with a leg length of 20 mm are mounted as spacers These sections also provide exact markings which facilitate the alignment of the machine in the middle of the measurement site The prepared boards are then covered with the insulating felt material (b) cut to size The felt flooring of the joint planes which are neither stood on nor driven over (type A surface in Figure DD.1) are covered with a simple wire mesh fastened to the edge strips and to the attachment points; for this purpose, the sections should be provided with holes Thus, the material is adequately attached, but it remains possible to replace the felt material should it become soiled As a wire mesh, a so-called aviary wire (e) with a mesh width of 10 mm and a wire diameter of 0,8 mm has proved to be suitable This wire appears to protect the surface adequately without affecting the acoustic conditions Protection by simple wire mesh is not, however, sufficient in the area subjected to traffic (type B surface in Figure DD.1) For these surfaces, the use of wire grating of corrugated steel wire (f) with a diameter of 3,1 mm and a mesh width of 30 mm has proved to be suitable The construction of the measurement site as described above offers two advantages: it can be prepared without much time and effort, and all the materials are easily obtainable The fact that the microphone positions are not situated directly above the flooring of the measurement site allows the microphones to be easily mounted on stands, assuming that the ground is even and hard as, for example, an asphalt or concrete site When arranging the microphones, account has to be taken of the fact that the height of the microphones has to be determined in relation to the surface of the flooring of the measurement site It shall, therefore, be 40 mm higher when measuring from the ground under the microphone BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 44 - Dimensions in mm (unless otherwise stated all dimensions are approximate) Key A This surface is not suitable to carry weight Do not stand on or drive over B This surface is suitable to carry weight May be stood on or driven over a Backing layer of plastics coated chipboard (nominally 19 thick) b Mineral wool fibre layer (nominally 20 thick) c Aluminium T-sections (nominally thick × 20 high) d Aluminium U-sections (nominally thick × 20 high) e Wire mesh (nominally 10 × 10 mesh made of 0,8 diameter steel wire) f Wire grating (nominally 30 × 30 mesh made of 3,1 diameter steel wire) Figure DD.1 Sketch of the measurement surface covered with an artificial surface (not to scale) BS EN 50636-2-91:2014 - 45 - EN 50636-2-91:2014 Annex EE (informative) Safety instructions EE.1 General This annex presents safe operating practices for all machine types covered by this standard These practices are not all inclusive The substance of these requirements should be provided with each machine as appropriate and tailored to the specific type of machine It should also include information concerning noise and vibration levels and any necessary warnings, together with the following: IMPORTANT READ CAREFULLY BEFORE USE KEEP FOR FUTURE REFERENCE EE.2 Safe operating practices EE.2.1 Training a) Read the instructions carefully Be familiar with the controls and the correct use of the machine b) Never allow children or people unfamiliar with these instructions to use the machine Local regulations can restrict the age of the operator c) Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people or their property EE.2.2 Preparation a) Before use check the supply and extension cord for signs of damage or aging If the cord becomes damaged during use, disconnect the cord from the supply immediately DO NOT TOUCH THE CORD BEFORE DISCONNECTING THE SUPPLY Do not use the machine if the cord is damaged or worn b) Before use, always visually inspect the machine for damaged, missing or misplaced guards or shields c) Never operate the machine while people, especially children, or pets are nearby EE.2.3 Operation a) Keep supply and extension cords away from cutting means b) Wear eye protection and stout shoes at all times while operating the machine c) Avoid using the machine in bad weather conditions especially when there is a risk of lightning d) Use the machine only in daylight or good artificial light e) Never operate the machine with damaged guards or shields or without guards or shields in place f) Switch on the motor only when the hands and feet are away from the cutting means g) Always disconnect the machine from the power supply (i.e remove the plug from the mains, remove the disabling device or removable battery) 1) whenever the machine is left unattended; 2) before clearing a blockage; BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 46 - 3) before checking, cleaning or working on the machine; 4) after striking a foreign object; 5) whenever the machine starts vibrating abnormally h) Take care against injury to feet and hands from the cutting means i) Always ensure that the ventilation openings are kept clear of debris EE.2.4 Maintenance and storage a) Disconnect the machine from the power supply (i.e remove the plug from the mains, remove the disabling device or removable battery) before carrying out maintenance or cleaning work b) Use only the manufacturer’s recommended replacement parts and accessories c) Inspect and maintain the machine regularly Have the machine repaired only by an authorized repairer d) When not in use, store the machine out of the reach of children EE.2.5 Recommendation (For mains powered machines and those with an integral charger) The machine should be supplied via a residual current device (RCD) with a tripping current of not more than 30 mA BS EN 50636-2-91:2014 - 47 - EN 50636-2-91:2014 Annex FF (normative) Test enclosure - Base The base shall consist of 19 mm plywood covered with 500 mm squares of coconut matting nailed to the plywood with nails spaced as shown in Figure FF.1 (see also Figure FF.2) Any square of coconut matting showing a worn area where there is evidence of 50 % or more reduction in the height or number of fibres shall be replaced The minimum base size shall be 1,5 m larger than the cutting width and 1,5 m larger than the distance between the forward edge of the leading blade tip circle and the rear edge of the trailing blade tip circle The coconut matting shall have approximately 20 mm high fibres embedded in a PVC base weighing approximately 000 g/m² Dimensions in mm NOTE Dimensions shown are approximate Figure FF.1 Nail plan of base BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 48 - Dimensions in mm Figure FF.2 Base detail BS EN 50636-2-91:2014 - 49 - EN 50636-2-91:2014 Annex ZZ (informative) Coverage of Essential Requirements of EU Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and within its scope the standard covers all relevant essential requirements as given in EU Directive 2006/42/EC (Machinery Directive) Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive concerned WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard BS EN 50636-2-91:2014 EN 50636-2-91:2014 - 50 - Bibliography The bibliography of Part is applicable except as follows Addition: CR 1030-1:1995, Hand-arm vibration Guidelines for vibration hazards reduction Part 1: Engineering methods by design of machinery EN 60335-2-29, Household and similar electrical appliances Safety Part 2-29: Particular requirements for battery chargers (IEC 60335-2-29) EN 60745-1:2009, Hand-held motor-operated electric tools Safety Part 1: General requirements (IEC 60745-1:2006, modified) EN 62133:2003, Secondary cells and batteries containing alkaline or other non-acid electrolytes Safety requirements for portable sealed secondary cells, and for batteries made from them, for use in portable applications (IEC 62133:2002) This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and across all sectors choose standards to help them achieve their goals Information on standards We can provide you with the knowledge that your organization needs to succeed Find out more about British Standards by visiting our website at bsigroup.com/standards or contacting our Customer Services team or Knowledge Centre Buying standards You can buy and download PDF versions of BSI publications, including British and adopted European and international standards, through our website at bsigroup.com/shop, where hard copies can also be purchased If you need international and foreign standards from other Standards Development Organizations, hard copies can be ordered from our Customer Services team Subscriptions Our range of subscription services are designed to make using standards easier for you For further information on our subscription products go to bsigroup.com/subscriptions With British Standards Online (BSOL) you’ll have instant access to over 55,000 British and adopted European and international standards from your desktop It’s available 24/7 and is refreshed daily so you’ll always be up to date You can keep in touch with standards developments and receive substantial discounts on the purchase price of standards, both in single copy and subscription format, by becoming a BSI Subscribing Member PLUS is an updating service exclusive to BSI Subscribing Members You will automatically receive the latest hard copy of your standards when they’re revised or replaced To find out more about becoming a BSI Subscribing Member and the benefits of membership, please visit bsigroup.com/shop With a Multi-User Network Licence (MUNL) you are able to host standards publications on your intranet Licences can cover as few or as many users as you wish With updates supplied as soon as they’re available, you can be sure your documentation is current For further information, email bsmusales@bsigroup.com BSI Group Headquarters 389 Chiswick High Road London W4 4AL UK We continually improve the quality of our products and services to benefit your business If you find an inaccuracy or ambiguity within a British Standard or other BSI publication please inform the Knowledge Centre Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) and has formally licensed such information to BSI for commercial publication and use Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI Details and advice can be obtained from the Copyright & Licensing Department Useful Contacts: Customer Services Tel: +44 845 086 9001 Email (orders): orders@bsigroup.com Email (enquiries): cservices@bsigroup.com Subscriptions Tel: +44 845 086 9001 Email: subscriptions@bsigroup.com Knowledge Centre Tel: +44 20 8996 7004 Email: knowledgecentre@bsigroup.com Copyright & Licensing Tel: +44 20 8996 7070 Email: copyright@bsigroup.com