EN IEC 62841-3-7:2021/A11:2021

SLOVENSKI STANDARD
01-julij-2021
Elektromotorna ročna orodja, prenosna orodja ter stroji za trato in vrt - Varnost - 3-
7. del: Posebne zahteve za premične stenske žage - Dopolnilo A11
Electric motor-operated hand-held tools, transportable tools and lawn and garden
machinery - Safety - Part 3-7: Particular requirements for transportable wall saws
Outils électroportatifs à moteur, outils portables et machines pour jardins et pelouses -
Sécurité - Partie 3-7: Exigences particulières pour les scies murales portables
Ta slovenski standard je istoveten z: EN IEC 62841-3-7:2021/A11:2021
ICS:
25.080.60 Strojne žage Sawing machines
25.140.20 Električna orodja Electric tools
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62841-3-7:2021/A11

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 25.140.20
English Version
Electric motor-operated hand-held tools, transportable tools and
lawn and garden machinery - Safety - Part 3-7: Particular
requirements for transportable wall saws
Outils électroportatifs à moteur, outils portables et machines Elektrische motorbetriebene handgeführte Werkzeuge,
pour jardins et pelouses - Sécurité - Partie 3-7: Exigences transportable Werkzeuge und Rasen- und
particulières pour les scies murales portables Gartenmaschinen - Sicherheit - Teil 3-7: Besondere
Anforderungen für transportable Wandsägen
This amendment A11 modifies the European Standard EN IEC 62841-3-7:2021; it was approved by CENELEC on 2021-04-26. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62841-3-7:2021/A11:2021 E

EN IEC 62841 3 7:2021/A11:2021 (E)
European foreword
This document (EN IEC 62841-3-7:2021/A11:2021) was prepared by CLC/TC 116 “Safety and
environmental aspects of motor-operated electric tools”.
The following dates are fixed:
• latest date by which this document has (dop) 2022-04-26
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2025-04-26
standards conflicting with this document
have to be withdrawn
This document modifies by common modifications EN IEC 62841-3-7:2021, which consists of the text of
116/455/FDIS (future IEC 62841-3-7, Ed. 1) prepared by IEC/TC 116 “Safety of motor-operated electric
tools”.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This series is divided into four parts:
Part 1: General requirements which are common to most hand-held electric motor operated tools (for the
purpose of this standard referred to simply as tools) which could come within the scope of this standard;
Part 2, 3 or 4: Requirements for particular types of tools which either supplement or modify the
requirements given in Part 1 to account for the particular hazards and characteristics of these specific
tools.
The Part 3-7 is to be used in conjunction with EN 62841-1:2015 and its amendments.
The Part 3-7 supplements or modifies the corresponding clauses in EN 62841-1:2015, so as to convert it
into the European Standard: Particular requirements for transportable wall saws.
Where a particular subclause of Part 1 is not mentioned in Part 3-7, that subclause applies as far as
relevant. When this standard states “addition”, “modification” or “replacement”, the relevant text in Part 1
is to be adapted accordingly.
The following print types are used:
— requirements: in roman type;
— test specifications: in italic type;
— notes: in smaller roman type.
The terms defined in Clause 3 are printed in bold typeface.
Subclauses, notes, tables and figures which are additional to those in Part 1 are numbered starting
from 101.
Clauses, subclauses, notes, tables, figures and annexes which are additional to those in
IEC 62841-3-7:2020 are prefixed “Z”.
This document follows the overall requirements of EN ISO 12100.
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).
EN IEC 62841 3 7:2021/A11:2021 (E)
For the relationship with EU Directive(s), see informative Annex ZZ, which is an integral part of this
document.
Compliance with the clauses of Part 1 together with Part 3-7 provides one means of conforming with the
essential health and safety requirements of the Directive concerned.
EN IEC 62841 3 7:2021/A11:2021 (E)
1 Modification to Clause 1, “Scope”
Replace the existing text of Clause 1 with the following:
“This clause of Part 1 is applicable, except as follows:
Replacement of the third paragraph:
The rated voltage is not more than 250 V for single-phase a.c. or d.c. tools, and 480 V for three-phase
a.c. tools.
Addition:
This document applies to transportable wall saws guided by a track guiding system intended for dry
cutting or to be connected to a liquid system for cutting concrete, stone or similar material by means of a
diamond wheel. The rated speed of the diamond wheel does not exceed a peripheral speed of 100 m/s
at rated capacity.
This document does not apply to transportable wall saws with a design that allows an automatic change
of the cutting direction without user intervention before any change of the cutting direction.
This document does not apply to transportable wall saws that employ hydraulic systems.
This document does not apply to hand-held cut-off machines.
NOTE 101 Hand-held cut-off machines will be covered by a future part of IEC 62841-2.
This document covers all significant hazards, hazardous situations or hazardous events relevant for tools
covered by this standard.
NOTE Z101 Essential requirements not mentioned in Table ZZ.1 are deemed to be not applicable, because the
corresponding hazards are either not relevant for tools covered by this standard or do not require specific action by
the designer.”
2 Addition to Clause 2, “Normative references”
Add the following normative reference and information and delete from the Bibliography:
"Replacement of normative reference ISO 11203:
ISO 11203:1995, Acoustics — Noise emitted by machinery and equipment — Determination of emission
sound pressure levels at a work station and at other specified positions from the sound power level"
3 Modification to Clause 3, “Terms and definitions”
Replace the existing 3.106 with the following:
“3.106
saw unit
unit on which the diamond wheel, the wheel guard, the saw unit feed motor, if any, and the interface to
connect it to the track guiding system are mounted”
4 Modifications to Clause 8, “Marking and instructions”
Add the following additional safety warning to 8.14.1.101:
“f) Never leave the wall saw unattended during operation. This reduces the risk of jamming the
diamond wheel which could cause loss of control or damage to the wall saw.
NOTE This warning is omitted, if the wall saw is equipped with a momentary power switch without a provision
to lock it in the “on” position.”
EN IEC 62841 3 7:2021/A11:2021 (E)
Replace the text and NOTE after 8.14.2 c) 101) with the following:
“8.14.2 Za) Replacement:
Emissions
1) The noise emission, measured in accordance with I.2, as follows:
— A-weighted emission sound pressure level L and its uncertainty K , where L exceeds
pA pA pA
70 dB(A).
Where L does not exceed 70 dB(A), this fact shall be indicated;
pA
— A-weighted sound power level L and its uncertainty K , where the A-weighted emission
WA WA
sound pressure level L exceeds 80 dB(A);
pA
— C-weighted peak emission sound pressure level L , where this exceeds 130 dB in relation
pC,peak
to 20 µPa.
2) Recommendation for the operator to wear hearing protection.
3) The following information:
— that the declared noise emission value(s) have been measured in accordance with a standard
test method and may be used for comparing one tool with another;
— that the declared noise emission value(s) may also be used in a preliminary assessment of
exposure.
4) A warning:
— that the noise emissions during actual use of the power tool can differ by up to 10 dB compared
to the declared values, depending on the diamond wheel and working conditions, which should
be taken into account when selecting hearing protection; and
— of the need to identify safety measures to protect the operator that are based on an estimation of
the noise exposure in the actual conditions of use (taking account of all parts of the operating
cycle such as the times when the tool is switched off and when it is running idle in addition to the
trigger time).”
5 Addition to Clause 19, “Mechanical hazards”
Add the following new subclause 19.4:
“19.4 Addition:
Wall saws with manual feed shall have at least one handle or grasping surface to ensure safe handling
during use.”
6 Modifications to Clause 20, “Mechanical strength”
Add the following new subclause 20.3:
“20.3 Addition:
If a wall saw includes any hand-held unit(s) such as a remote control, only 20.3.1 applies for these
hand-held unit(s).”
Replace the first paragraph of subclause 20.5 with the following:
“Wall saw handles and grasping surfaces for safe handling during use as required by 19.4 shall have
adequate mechanical strength in order to provide insulation between the grasping area and the output
shaft.”
EN IEC 62841 3 7:2021/A11:2021 (E)
7 Modifications to Clause 21, “Construction”
Replace the existing subclause 21.30 with the following:
“21.30 This subclause of Part 1 is applicable for handles and grasping surfaces for safe handling during
use as required by 19.4.”
Replace the third paragraph of subclause 21.102 with the following:
“Controls on the saw unit shall override commands from the remote control.”
Delete the existing subclause 21.104.
Replace the existing subclause 21.105 with the following:
“21.105 Tools equipped with motor-fed saw units shall be fitted with (an) additional control(s),
separate from the power switch, for
— selecting the direction of travel for the saw unit feed motor; and
— turning the saw unit feed motor off and on.
The actuating member of this control(s) shall be easily visible and accessible.
Switching on the power switch shall not result in starting the saw unit feed motor.
The stopping of all movements shall be possible with one actuation of a single control.
Compliance is checked by inspection and by practical test.”
8 Modification to Clause 24, “Supply connection and external flexible cords”
Replace the existing subclause 24.4 with the following:
“24.4 Replacement:
Supply cords shall be not lighter than heavy polychloroprene or PUR sheathed flexible cord (code
designation 60245 IEC 66, H07RN-F or H07BQ-F) or equivalent.
Compliance is checked by inspection and by measurement.”
9 Modifications to Annex I, “Measurement of noise and vibration emissions”
Replace the title of Annex I with the following:
“Annex I
(normative)
Measurement of noise and vibration emissions”
and delete NOTE 101.
rd
Replace the 3 paragraph of I.2.2.3 with the following:
“The radius R of the hemisphere shall start from the ground (centre of the measurement hemisphere on
the reflecting plane, see key item 8 of Figure I.101). The radius R may be reduced to a minimum of 1 m
from the reference box, if this is needed for technical reasons. The radius R shall be reported. The
number of microphones is 10 according to Table B.1 and Figure B.1 describing the key microphone
positions of ISO 3744:2010. It may be reduced down to 6 observing the requirements given in
ISO 3744:2010, 8.1.1, but the microphone positions 2, 4, 6, 8, 10 and 12 shall be used in that case.”
EN IEC 62841 3 7:2021/A11:2021 (E)
Replace the existing I.2.3.2 with the following:
“I.2.3.2 Transportable tools
Replacement:
The A-weighted emission sound pressure level L at the work station shall be determined in accordance
pA
with ISO 11201:2010, grade 2 at the operator’s position in normal operation according to I.2.4 and I.2.5.
The microphone position during measuring and respectively the method to obtain L shall be at 0,7 m
pA
distance from the handle or grasping surface for manual feeding of the wall saw at the position of the
operator's head, 10 cm from the ear, on the side with the highest sound pressure level.
For the case of no defined work station and for wall saws operated with a remote control, the A-
weighted emission sound pressure level L at the work station shall be determined in accordance with
pA
ISO 11203:1995 as follows:
L = L - Q, in dB
pA WA
where Q = 14 dB.
Three measuremen
...