SIST EN 50636-2-92:2015

SLOVENSKI STANDARD
01-april-2015
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Household and similar electrical appliances - Safety - Part 2-92: Particular requirements
for pedestrian-controlled mains-operated lawn scarifiers and aerators
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-92:
Besondere Anforderungen für handgeführte netzbetriebene Rasen-Vertikutierer und
Rasen-Lüfter
Appareils électrodomestiques et analogues - Sécurité - Partie 2-92: Règles particulières
pour les scarificateurs de gazon et les aérateurs fonctionnant sur le réseau et pour
conducteur à pied
Ta slovenski standard je istoveten z: EN 50636-2-92:2014
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 50636-2-92

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 65.060.70 Supersedes EN 60335-2-92:2005
English Version
Household and similar electrical appliances - Safety - Part 2-92:
Particular requirements for pedestrian-controlled mains-operated
lawn scarifiers and aerators
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-92: Règles particulières pour les scarificateurs de ähnliche Zwecke - Teil 2-92: Besondere Anforderungen für
gazon et les aérateurs fonctionnant sur le réseau et pour handgeführte netzbetriebene Rasen-Vertikutierer und
conducteur à pied Rasen-Lüfter

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 50636-2-92:2014 E
Contents Page
Foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General requirement .10
5 General conditions for the tests .10
6 Classification .11
7 Marking and instructions .11
8 Protection against access to live parts .14
9 Starting of motor-operated appliances .14
10 Power input and current .14
11 Heating .15
12 Void .15
13 Leakage current and electric strength at operating temperature .15
14 Transient overvoltages .15
15 Moisture resistance .15
16 Leakage current and electric strength .15
17 Overload protection of transformers and associated circuits .15
18 Endurance .15
19 Abnormal operation .16
20 Stability and mechanical hazards .16
21 Mechanical strength .23
22 Construction .24
23 Internal wiring .25
24 Components .25
25 Supply connection and external flexible cords .26
26 Terminals for external conductors.27
27 Provision for earthing .27
28 Screws and connections .27
29 Clearances, creepage distances and solid insulation .27
30 Resistance to heat and fire .27
31 Resistance to rusting .27
32 Radiation, toxicity and similar hazards .27
Annex AA (normative) Safety signs and symbols .39
Annex BB (informative) Safety Instructions .42

– 3 – EN 50636-2-92:2014
Annex CC (normative) Vibration .45
Annex DD (normative) Noise test code – Engineering method (grade 2) .50
Annex EE (informative) Example of a material and construction fulfilling the requirements
for an artificial surface .56
Annex FF (normative) Base .58
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives .60
Bibliography .61

Figures
Figure 101  Safety distances – Machines with more than one axle . 28
Figure 102  Safety distances – Single axle machines . 29
Figure 103  Foot probe . 30
Figure 104  Strength of tine assembly . 31
Figure 105  Operator zone . 32
Figure 106  Front and rear guarding of tines . 33
Figure 107  Side guarding of tines . 34
Figure 108  Guarding of rear discharge machines . 35
Figure 109  Guarding of front discharge machines . 36
Figure 110  Thrown object test rig for rear discharge scarifiers with rigid tines . 37
Figure 111  Impact test fixture for handle insulation . 38
Figure AA.1  “Read operator’s manual” . 39
Figure AA.2  “Keep bystanders away” . 40
Figure AA.3  “WARNING – Beware of sharp tines, keep fingers and toes away. Remove plug
from mains before maintenance, adjusting, cleaning or if the cord is entangled or damaged.
Tines continue to rotate after the motor is switched off” . 40
Figure AA.4  “Keep supply flexible cord away from tines” . 41
Figure CC.1 – Examples of transducer location/orientation . 47
Figure CC.2 – Examples of transducer location/orientation for hand-arm vibration . 48
Figure DD.1  Microphone positions on the hemisphere (see Table DD.1) . 51
Figure EE.1  Sketch of the measurement surface covered with an artificial surface (not to
scale) . 57
Figure FF.1  Base detail. 58
Figure FF.2  Nail plan of base . 59

Tables
Table DD.1  Co-ordinates of microphone positions . 52
Table DD.2  Absorption coefficients . 53

Foreword
This document (EN 50636-2-92:2014) 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
• latest date by which the national standards conflicting (dow) 2016-09-02
with this document have to be withdrawn
This document supersedes EN 60335-2-92:2005.
EN 60335-2-92:2014 includes the following significant technical changes:
– rewording of some clauses;
– 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 “Particular requirements for pedestrian-controlled walk-
behind mains operated scarifiers and aerators”.
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 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 , notes, tables and figures 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. Common modifications are indicated by a vertical line in the left margin of the text.

– 5 – EN 50636-2-92:2014
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.
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.

– 7 – EN 50636-2-92:2014
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 pedestrian controlled walk-behind mains operated scarifiers and aerators, hereinafter
referred to as ‘machine(s)’, which are designed for re-generating lawns by, for instance, combing out
grass, thatch and moss or cutting vertically into the lawn face using tines which rotate about a
horizontal axis. This standard applies in conjunction with Part 1.
NOTE 1 Lawn scarifiers are also known as lawn rakes.
This European Standard does not apply to non-powered scarifiers and aerators, battery powered
scarifiers and aerators, vertical axis scarifiers and aerators or those aerators which cut into the soil by
means of a reciprocating motion and ride-on machines.
This European Standard does not apply to
– lawnmowers (EN 60335-2-77);
– lawn trimmers (EN 60335-2-91);
– lawn edge trimmers (EN 60335-2-91);
– lawn edgers, flail mowers, sickle-bar mowers or agricultural mowers.
This European Standard is not applicable to aerators/scarifiers which are manufactured before the
date of publication of this document.
This European Standard deals with all the significant hazards presented by pedestrian-controlled
lawn scarifiers and lawn aerators when they are used as intended and under conditions of misuse
which are reasonably foreseeable.
NOTE 2 Combustion engine machines are covered by EN 13684.
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
EN 60335-1:2012, Household and similar electrical appliances  Safety  Part 1: General
requirements (IEC 60335-1:2010, modified)
EN ISO 354:1993, Acoustics  Measurement of sound absorption in a reverberation room
(ISO 354:2003)
EN ISO 2758:2003, Paper  Determination of bursting strength (ISO 2758:2001)
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 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 12100:2010, Safety of machinery  General principles for design  Risk assessment and
risk reduction (ISO 12100:2010)
EN ISO 13857:2008, Safety of machinery  Safety distances to prevent hazard zones being reached
by upper and lower limbs (ISO 13857:2008)
EN ISO 20643:2008; Mechanical vibration  Hand-held and hand-guided machinery  Principles for
evaluation of vibration emission (ISO 20643:2005)
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
Addition:
3.101
braking system
combination of one or more brakes and related means of operation and control
3.102
catcher
part or combination of parts which provides a means for collecting grass, thatch, moss or other debris
3.103
control
means or device which will control the operation of the machine or any specific operating function
thereof
3.104
discharge chute
extension of the tine enclosure from the discharge opening, generally used to control the discharge
of material from the tines
3.105
discharge opening
gap or opening in the tine enclosure through which grass, thatch, moss and other debris may be
discharged.
a) front discharge
denotes throwing out grass, thatch and moss so that they will be collected in a catcher which is
located in front of the tines
b) rear discharge
denotes throwing out grass, thatch and moss so that they will be collected in a catcher which is
located behind the tines
– 9 – EN 50636-2-92:2014
3.106
guard
part of the machine or component incorporated to provide protection for the operator and/or bystander
by means of a physical barrier
3.107
handle
any part likely to be hand-held for guiding the machine in normal use
3.108
hit
test projectile passing completely through all layers of the target material
3.109
intended use
any use of the machine which is reasonably foreseeable, as described in the user instructions, and
which is consistent with such activities as operating, starting, stopping or connecting to (or
disconnecting from) a mains supply
3.110
lawn aerator
corer
machine which uses the ground to determine the depth of cut, designed for penetrating the lawn
surface
3.111
lawn scarifier
machine designed to scratch the surface, or earth face thereby also combing the lawn
3.112
maximum operating motor speed
highest motor speed obtainable when the motor is adjusted in accordance with the instructions, with
the tines engaged
3.113
operator control
any control requiring the operator’s actuation to perform specific functions
3.114
operator presence control
control designed so that it will automatically interrupt power to a drive when the operator's actuating
force is removed
3.115
operator zone
zone for persons operating a lawn scarifier or aerator (presented in Figure 105)
3.116
parking brake
device incorporated into the machine which, when operated, prevents the machine from moving from
a stationary position and remains applied without the operator present
3.117
pedestrian-controlled
ground-supported, controlled by an operator walking behind

3.118
service brake
designated primary means for decelerating and stopping a machine from its ground travel speed
3.119
tine
mechanism used to provide the penetrating or scratching action of a machine
3.120
tine enclosure
part or assembly which provides the protective means around the tines
3.121
tine tip circle
path described by the outermost point of the tine as it rotates about its shaft axis
3.122
traction drive
means (system) used to transmit power from the motor to the ground drive means
3.123
width of cut
total width of scarification/aeration measured across the tines at right angles to the direction of travel
3.124
working position
any depth setting of the tines designated by the manufacturer
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:
Tests carried out in Clauses 20 and 21 require a new machine for each test. If testing requires the
same test to be carried out on the machine for different functions a new machine shall be used for
each test.
5.5 Addition:
During the tests the tines are adjusted in accordance with the manufacturer's instructions.
5.6 Addition:
Electronic speed control devices are set for the maximum operating motor speed.

– 11 – EN 50636-2-92:2014
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Machines shall be of class II with respect to protection against electric shock.
Compliance is checked by inspection and by the relevant tests.
6.2 Addition:
Machines shall be at least IPX4.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
The machines shall be marked with the following minimum information:
– business name and full address of the manufacturer and, where applicable his authorized
representative;
– designation of the machine,
designation of machine may be achieved by a combination of letters and/or numbers. The
designation may be provided in the form of a code, providing that this code is explained by giving
the explicit designation such as “scarifiers” or “aerators”, etc. in the instructions supplied with the
machine;
NOTE 1 An example of such code is “A123B”.
– year of construction, that is the year in which the manufacturing process is completed;
– 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.
– serial number, if any;
– rated power in watts or rated current in amperes;
– guards designed to be opened or removed shall have a sign warning of the relevant hazard
visible on the machine both when the guard is closed and when it is opened or removed;
– controls which may give rise to a hazard (e.g. operator presence control for the tines) when
operated shall be marked or so placed as to indicate clearly which part of the machine they
control;
– 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.
Where replaceable during normal use, except for spring type tines, the tines shall be marked to
identify the part number(s) and the manufacturer, importer or supplier.

Marking giving warning information shall be easily legible and located as close as practicable to the
relevant hazard.
The substance of the following warnings shall be placed in a prominent position on the machine:
– WARNING – Read user instructions;
– WARNING – Beware of sharp tines, keep fingers and toes away. Remove plug from mains
before maintenance, adjusting, cleaning or if the cord is entangled or damaged;
– Tines continue to rotate after the motor is switched off;
– Keep flexible cord away from the tines;
– Keep bystanders away,
and as appropriate to the machine design:
– Wear eye and/or ear protection.
If a pictogram is used it shall be that shown in Annex AA. It shall be in contrasting colours to the base
material. If it is embossed, stamped or cast colours are not required. Markings or safety signs giving
cautionary information shall be located close to the hazard.
Compliance shall be checked by inspection.
7.6 Addition:
NOTE 101 Information on operator symbols may be found in EN ISO 3767-1 and EN ISO 3767-3, ISO 11684 and in ISO 3864
for colours.
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;

– 13 – EN 50636-2-92:2014
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, especially with a view to necessary tilting of the
machine and keeping both hands in the operating position before returning the machine to the
ground;
k) instructions for the operating position and the correct and safe operation of the machine such as
moving, safe positioning, handling, clearing blockages and keeping the discharge chute clear of
processed material for use, preparation, maintenance and storage of the machine;
l) an advice to not overreach and to keep the balance at all times, to always be sure of the 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) if a collecting facility is provided with the machine, instructions for when and how to attach and
detach the collection device to and from the machine;
p) information about the residual risks that remain despite the inherent safe design measures,
safeguarding and complementary protective measures adopted;
q) instructions to always wear substantial footwear and long trousers while operating the machine;
r) instructions to disconnect the supply (e.g. remove the plug from the mains or remove the disabling
device)
1) whenever the machine is left by the user;
2) before clearing a blockage;
3) before checking, cleaning or working on the machine;
4) after striking a foreign object to inspect the machine for damage;
5) if the machine starts to vibrate abnormally, for immediately check;

s) 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;
t) a warning never to operate the machine with defective guards or shields, or without safety
devices, or if the cord is damaged or worn;
u) 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;
v) 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;
w) the operating method to be followed in the event of accident or breakdown;
x) instructions how to disconnect the machine from the mains, if the cord becomes damaged or
entangled during use;
y) recommendations
1) 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,
2) to avoid using the machine in bad weather conditions especially when there is a risk of
lightning;
z) information about airborne noise emissions of the machine according to Annex DD, this includes:
1) the A-weighted emission sound pressure level at the operator position as determined
according to Annex DD, where this exceeds 70 dB(A); where this level does not exceed
70 dB(A), this fact shall be indicated;

2) the A-weighted sound power level emitted by the machinery as determined according to
Annex DD;
3) the uncertainties surrounding the determined noise emission values according to Annex DD;

aa) the vibration total value to which the hands are subjected as determined according to Annex CC,
where this exceeds 2,5 m/s²; where this level does not exceed 2,5 m/s², this fact shall be
indicated;
bb) the uncertainty of measurement for vibration value;
cc) instructions how to proceed in case of abnormal vibrations;
dd) mass in kilograms.
NOTE Examples of safety instructions are given Annex BB.
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.
9 Starting of motor-operated appliances
This clause of Part 1 is replaced by the following.
Motors shall start under all normal voltage conditions which may occur in use.
In all cases, the machine shall operate and overload protection devices incorporated in the machine
shall not activate. Centrifugal and other automatic starting switches, if any, shall operate reliably, and
without contact chattering.
Compliance is checked by starting the machine three times, at no-load, at a voltage equal to
0,85 times rated voltage or the lower limit of the rated voltage range, with any control device set at
maximum speed.
For the test the tines are raised so that they are not in contact with any surface.
The machine shall operate in such a way that safety is not affected.
10 Power input and current
This clause of Part 1 is applicable except as follows.
10.1 This clause of Part 1 is not applicable.

– 15 – EN 50636-2-92:2014
11 Heating
This clause of Part 1 is applicable except as follows:
11.5 Addition:
The machine shall be operated at rated voltage and rated current or rated power input until a
steady state is reached. The torque being applied shall be measured. When tested by 0,94 and
1,06 times rated voltage the previously determined torque shall be maintained.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.1.2 Modification:
The machine shall be rotated during the test along its vertical axis. The rate of rotation shall be 12 ± 2
revolutions per minute.
15.2 Addition:
Machines fitted with a machine inlet or cable coupler shall be tested with the appropriate mating
connector in place.
Air filters are not removed.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
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 standard. The insulation shall not be
damaged, and contacts and connections shall not have worked loose as a result of heating, vibration,
etc.
Moreover, overload devices shall not operate under normal running conditions.
Compliance is checked by the tests of Clause 18.102.
18.102 The machine is operated at no load, series motors being supplied at a voltage such that the
rotating speed is the same as that obtained at rated voltage and under normal operation. The
machine is operated for 48 h, reduced by the running time necessary for the tests of Clauses 11 and
13.
Machines are operated continuously, or for a corresponding number of periods, each period being not
less than 8 h.
During the test, replacement of carbon brushes is allowed and the machine is lubricated as in normal
use.
18.103 During the tests of Clause 18.102, overload protective devices shall not operate.
After the tests of Clause 18.102 the machine shall withstand the tests of Clause 16. Connections,
handles, guards, brush-caps and other fittings or components shall not have worked loose, and there
shall be no deterioration impairing safety.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.7 Addition:
This test is only conducted on machines with fixed or rigid tines.
19.9 This clause of Part 1 is not applicable.
20 Stability and mechanical hazards
This clause of Part 1 is applicable except as follows.
20.1 Modification:
This clause is not applicable to single axel machines.
20.2 Replacement:
To prevent unexpected operation which may result in a hazard, only manually reset cut-outs or those
which require the operating control to be released are allowed.
All power-driven components except the tines and the ground-contacting parts of machines with
traction drive shall be guarded to prevent contact with these parts during normal operation.
All apertures and safety distances shall conform to the relevant clauses of EN ISO 13857:2008.
Rotating covers or discs shall have a continuous unbroken or smooth surface.
Where a guard is designed to be opened or removed, thereby exposing a hazard, a safety sign
warning of the hazard shall be located on the guard or adjacent to the guard.

– 17 – EN 50636-2-92:2014
All guards shall be permanently attached to the machine and shall not be detachable without the use
of tools. The opening of guards shall require the use of a tool. An exceptions to this is the opening of
automatically closing hinged guards for discharge chutes.
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 is checked by inspection and measurement.
20.101 Power driven components
All power driven components except the tines and the ground-contacting parts of pedestrian-
controlled machines with traction drive shall be guarded to prevent contact with these parts during
normal operation.
All openings and safety distances shall conform to 4.5.2 and 4.5.3 of EN ISO 13857:2008 unless
otherwise specified in this standard.
Guards shall be provided to prevent accidental contact with hazardous servicing points when the
machine is serviced.
Compliance is checked by inspection.
20.102 Guard attachment
All guards shall be permanently attached to the machine and shall not be detachable without the use
of tools and shall withstand a force of 75 N in any direction.
The opening of guards, except for the following, shall require the use of a tool:
– the opening of removable interlocked guards which disable the protected moving parts;
– the opening of hinged, automatically closing guards for debris discharge chutes.
Compliance is checked by inspection.
20.103 Controls
20.103.1 General
Except as indicated in the following list, controls shall be located within, and have a range of
movement which remains within the anthropometric dimensions given for the operator zone 1 in
Figure 105:
– controls for setting the depth of penetration of the tines;
– catcher discharge arrangements;
The operating range of controls that do not require sustained manual actuation may be extended by
allowing the operator’s trunk, when standing with both feet on the ground, to articulate within the
confines of the operator zone 2 (e.g. lean forward until contacting the handle in any of the operating
positions). The control for lifting the tines off the ground for transportation reasons is regarded to be
such a control.
If the control for lifting the tines off the ground for transportation is foot operated it shall be ≤ 450 mm
in front of the handle, measured horizontally from the rearmost point of the handle. If the handle is
adjustable the ≤ 450 mm dimension shall apply for all positions of the handle.

It shall not be possible to sustain a motor speed greater than the maximum operating motor speed
by use of any control or by simple adjustments made by using standard tools.
On machines with traction drive it shall be possible to engage or disengage the traction drive when
the tines are operating.
Compliance shall be checked by inspection.
20.103.2 Operator presence control
Machines shall be fitted with a device on the control handle, which will automatically stop tine rotation
when the operator’s hands are removed from the handle. This may be accomplished, for example,
either by stopping the drive motor or by an intermediate tine clutch mechanism.
For restarting tine rotation, the control shall require two separate actions. If these actions are to be
carried out by using the same hand then the actions shall be separate and dissimilar in order to
prevent accidental “switch on”.
Compliance shall be checked by inspection.
20.103.3 Traction drive
The control for traction drive shall automatically stop or disengage the traction drive when the
operator's hands are removed from the handle.
The reverse function of the traction drive control shall require continuous activation in the direction
of travel to drive. It shall not be possible to drive the tines when the traction drive is in reverse.
Compliance shall be checked by inspection.
20.103.4 Tines
Machines that have a designated position that raises the tines such that they are not in contact with
the ground shall be provided with a means to prevent unintentional contact with the rotating tines.
This shall be achieved by one of the following three options:
a) it shall not be possible to raise the tines into a transport position unless the tines are stopped,
and it shall not be possible to engage the drive to the tines when the machine is in the transport
position (i.e. the tines are not in contact with the ground); or
b) the tines shall stop within 3 s of the operator presence control being released; or
c) the tine enclosure shall prevent inadvertent foot contact by the operator.
Compliance shall be checked for a) by inspection, for b) by measurement and for c) by the foot probe
test of Clause 20.109.
NOTE The requirements for stopping time test are not included in this standard and can be found in EN 60335-2-77.
20.104 Heavy machines – Test method
Heavy machines are required to have a service and parking brake system.
Compliance is checked by measurement and the following test.
A service and parking brake system is required on machines with a mass greater than 63 kg.
NOTE The requirements for service and parking brakes for heavy machines are not included in this standard and can be
found in ISO 5395-2.
– 19 – EN 50636-2-92:2014
20.105 Vibration reduction
20.105.1 Reduction by design and protective measures
The machine shall be designed to generate a vibration level as low as practicable. The
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