IEC 62863:2017

Methods of measuring performances of electric hair clippers or trimmers for household use

IEC 62863:2017 applies to reciprocating electric hair clippers or trimmers for household use.
This document deals with the methods of measuring performances of electric hair clippers or trimmers for household use with a rated voltage not greater than 250 V.
This document does not specify safety or performance requirements.
This document does not apply to professional hair clippers or trimmers, animal shearers and animal clippers, or shavers. For shavers, refer to IEC 61254.
This document does not cover safety requirements (see IEC 60335-2-8).

Méthode de mesure de l'aptitude à la fonction des tondeuses ou des tondeuses de finition pour usage domestique

L'IEC 62863:2017 s’applique aux tondeuses ou tondeuses de finition électriques à mouvement alternatif pour usage domestique.
Le présent document traite des méthodes de mesure de l'aptitude à la fonction des tondeuses ou tondeuses de finition électriques pour usage domestique, dont la tension assignée ne dépasse pas 250 V.
Le présent document ne spécifie pas les exigences de sécurité ou d'aptitude à la fonction.
Le présent document ne s’applique pas aux tondeuses ou tondeuses de finition professionnelles, aux tondeuses pour bétail et aux tondeuses pour animaux domestiques, ni aux rasoirs. Pour les rasoirs, se référer à l’IEC 61254.
Le présent document ne couvre pas les exigences de sécurité (voir IEC 60335-2-8).

General Information

• Status: Published
• Publication Date: 15-Aug-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 97.170 - Body care equipment
• Technical Committee: SC 59L - Small household appliances
• Current Stage: BPUB - Publication being printed
• Start Date: 21-Jul-2017

Standards Content (Sample)

IEC 62863
Edition 1.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Method of measuring performances of electric hair clippers or trimmers for
household use
Méthode de mesure de l'aptitude a la fonction des tondeuses ou tondeuses de
finition pour usage domestique
IEC 62863:2017-08(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2017 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org

The stand-alone application for consulting the entire The world's leading online dictionary of electronic and

bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in

Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional

documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical

iPad. Vocabulary (IEV) online.

IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary

The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and

variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of

committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been

and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc

details all new publications released. Available online and If you wish to give us your feedback on this publication or

also once a month by email. need further assistance, please contact the Customer Service

Centre: [e-mail].
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais

La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des

en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées

comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et

projets et les publications remplacées ou retirées. CISPR de l'IEC.

IEC Just Published - webstore.iec.ch/justpublished Service Clients - webstore.iec.ch/csc

Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette

Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:

Disponible en ligne et aussi une fois par mois par email. [e-mail].
---------------------- Page: 2 ----------------------
IEC 62863
Edition 1.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Method of measuring performances of electric hair clippers or trimmers for
household use
Méthode de mesure de l'aptitude a la fonction des tondeuses ou tondeuses de
finition pour usage domestique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.170 ISBN 978-2-8322-6201-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62863:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General conditions for the tests ....................................................................................... 6

4.1 General ................................................................................................................... 6

4.2 Pre-conditioning ...................................................................................................... 7

4.3 Battery condition ..................................................................................................... 7

4.4 Test environment .................................................................................................... 7

4.5 Limits of voltage variation ....................................................................................... 7

4.6 Test voltage ............................................................................................................ 7

4.7 Test frequency ........................................................................................................ 7

4.8 Test electrical supply system .................................................................................. 7

5 Testing procedures .......................................................................................................... 7

5.1 General ................................................................................................................... 7

5.2 Preconditioning run ................................................................................................. 7

5.3 Test condition for no-load operation ........................................................................ 8

5.4 Measurement of supply cord length ......................................................................... 8

5.5 Starting ability test .................................................................................................. 8

5.6 Ability-to-cut test ..................................................................................................... 8

5.7 Test of airborne acoustical noise........................................................................... 10

5.8 Test of reliability of the mechanical /electrical connection between the

adapter and the cord/cordless rechargeable hair clipper or trimmer ...................... 10

5.9 Determination of the working minutes of a rechargeable hair clipper or

trimmer after full charging ..................................................................................... 11

5.10 Determination of energy consumption of battery-operated hair clipper or

trimmer ................................................................................................................. 11

5.11 Endurance test ...................................................................................................... 11

6 Records of test information and test result ..................................................................... 12

6.1 Product details ...................................................................................................... 12

6.2 Test parameters .................................................................................................... 12

6.3 Measured data ...................................................................................................... 12

6.4 Test and laboratory details .................................................................................... 13

Annex A (informative) Supplier information of hair strip ........................................................ 14

Annex B (informative) Positioning of the hair clipper or trimmer under test ........................... 15

Bibliography .......................................................................................................................... 16

Figure 1 – Sketch for the stationary blade tooth plane ............................................................. 6

Figure 2 – Measurement of supply cord length ........................................................................ 8

Figure 3 – Stationary blade tooth plane parallel to the hair strip surface ................................. 9

Figure 4 – Hair strip width ....................................................................................................... 9

Figure 5 – Distribution of hairs on the hair strip ..................................................................... 10

Figure 6 – Orientation and length of hair ............................................................................... 10

Figure 7 – Electrical connection diagram............................................................................... 11

Figure B.1 – Positioning of the hair clipper or trimmer under test .......................................... 15

---------------------- Page: 4 ----------------------
IEC 62863:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METHOD OF MEASURING PERFORMANCES OF ELECTRIC
HAIR CLIPPERS OR TRIMMERS FOR HOUSEHOLD USE
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62863 has been prepared by subcommittee 59L: Small household

appliances, of IEC technical committee 59: Performance of household and similar electrical

appliances.

This bilingual version (2018-11) corresponds to the monolingual English version, published in

2017-08.
The text of this standard is based on the following documents:
FDIS Report on voting
59L/144/FDIS 59L/146/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
The French version of this standard has not been voted upon.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 5 ----------------------
– 4 – IEC 62863:2017 © IEC 2017

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 62863:2017 © IEC 2017 – 5 –
METHOD OF MEASURING PERFORMANCES OF ELECTRIC
HAIR CLIPPERS OR TRIMMERS FOR HOUSEHOLD USE
1 Scope

This document applies to reciprocating electric hair clippers or trimmers for household use.

This document deals with the methods of measuring performances of electric hair clippers or

trimmers for household use with a rated voltage not greater than 250V.
This document does not specify safety or performance requirements.

This document does not apply to professional hair clippers or trimmers, animal shearers and

animal clippers, or shavers. For shavers, refer to IEC 61254.
NOTE This document does not cover safety requirements (see IEC 60335-2-8).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.

IEC 60704-2-8, Household and similar electrical appliances – Test code for the determination

of airborne acoustical noise – Part 2: Particular requirements for electric shavers

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardisation at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
clipper
trimmer

appliance that is designed to cut hair that consists of a motor, drive system, fixed blade

containing teeth and a moving blade containing teeth moving in a reciprocating motion

intended for clipping/trimming, not shaving

Note 1 to entry: Depending on the specific function, clippers are also called trimmers.

3.2
battery-operated hair clipper
battery-operated hair trimmer

hair clipper or trimmer deriving its energy solely from primary batteries or secondary batteries

and not designed for connection to the mains supply or a charger, or from the battery packs

that are supplied by manufacturers together with the hair clipper or trimmer

Note 1 to entry: If the manufacturer supplies a specific charger and rechargeable batteries with the clipper or

trimmer, the combined device is considered as a rechargeable hair clipper or trimmer when performance is

measured.
---------------------- Page: 7 ----------------------
– 6 – IEC 62863:2017 © IEC 2017
3.3
rechargeable hair clipper
rechargeable hair trimmer

hair clipper or trimmer powered by rechargeable batteries or battery packs that are recharged

in the hair clipper or trimmer

Note 1 to entry: There are two types, cordless rechargeable hair clipper or trimmer and cord/cordless

rechargeable hair clipper or trimmer.
3.4
cordless rechargeable hair clipper
cordless rechargeable hair trimmer

rechargeable hair clipper or trimmer that is not intended to run while connected to the mains

supply or a charger
3.5
cord/cordless rechargeable hair clipper
cord/cordless rechargeable hair trimmer

cordless rechargeable hair clipper or trimmer that can be operated while connected to the

mains supply with discharged batteries
3.6
corded hair clipper
corded hair trimmer

hair clipper or trimmer without batteries or battery packs, that can operate only while

connected to the mains supply
3.7
cool state

state in which one hour passes after the outside of the device has fallen to ambient

temperature
3.8
stationary blade tooth plane
SEE: Figure 1.
Housing
Moving blade
Stationary blade
Tooth plane
IEC
Figure 1 – Sketch for the stationary blade tooth plane
3.9
soft surface

surface that prevents the device from moving while running and should have limited impact on

the temperature of the device
4 General conditions for the tests
4.1 General

Unless otherwise specified, the tests are carried out in accordance with Subclauses 4.1 to 4.8.

---------------------- Page: 8 ----------------------
IEC 62863:2017 © IEC 2017 – 7 –

Unless otherwise specified, the tests are carried out when the controller of the hair clipper or

trimmer is set to the highest setting.
4.2 Pre-conditioning

For rechargeable hair clippers, preconditioning shall be carried out according to 5.2.1 before

performing the tests specified in this document.

For hair clippers or trimmers other than rechargeable types, a preconditioning run shall be

carried out according to 5.2.2 before performing the tests specified in this document.

4.3 Battery condition

For battery-operated hair clippers or trimmers, new batteries shall be used, unless otherwise

specified.

For rechargeable hair clippers or trimmers, the battery shall be fully charged before each test

according to the manufacturer’s instructions.
4.4 Test environment

The tests are carried out in draft-free indoor environment at an ambient temperature of

(23 ± 2) °C.
4.5 Limits of voltage variation

During the test, the variation in the voltage shall not exceed ± 1 % of the test voltage.

4.6 Test voltage

Unless otherwise specified, the tests are carried out at a specific voltage within a voltage

range (e.g. 100 V to 240 V) or at the rated voltage or voltages (e.g. 120 V, or 120 V and

240 V).
4.7 Test frequency

Hair clippers or trimmers are tested at the rated frequency or within a rated frequency range

(e.g. rated as 50 Hz and 60 Hz, or 50 Hz to 60 Hz).
4.8 Test electrical supply system

Total harmonic distortion of the test electrical supply system shall be less than 5 %.

5 Testing procedures
5.1 General

Oil the cutting system according to the instructions for use before each test, unless otherwise

specified. During the oiling, the clipper blades shall be in a horizontal position.

5.2 Preconditioning run

5.2.1 For rechargeable hair clipper or trimmers, the following preconditioning run is

required.
a) Fully charge the device according to its instructions for use.
b) Let the device reach the cool state.
c) Oil the cutting system according to its instructions for use.

d) Lay the device horizontally on a soft surface with the teeth of the cutting element pointing

upwards.

e) Continuously run (discharge) the device under no-load test condition until it stops.

f) Let the device reach the cool state.
g) Repeat the procedures a) to f) three times.
5.2.2 For hair clippers or trimmers other than rechargeable type, the following
preconditioning run is required.
---------------------- Page: 9 ----------------------
– 8 – IEC 62863:2017 © IEC 2017
a) Oil the cutting system according to its instructions for use.

b) Lay the device horizontally on a soft surface with the teeth of the cutting element pointing

upwards.
c) Continuously run the device under no-load test conditions for 20 min.
d) Let the device reach the cool state.
5.3 Test condition for no-load operation

Lay the device horizontally on a soft surface with the teeth of the cutting element pointing

upwards and without any load on the cutters. If possible, there shall be no combs attached.

The device shall operate in normal mode (e.g. no turbo) with only the main cutting system in

operation.
The cutting head mounted during the tests shall be recorded.
5.4 Measurement of supply cord length

The length of the supply cord is measured between the point where the cord or the cord

sheath enters into the enclosure and the entry to the plug (see Figure 2). The cord is

stretched to its full length. For coiled cords, a 10 N force is applied to stretch.

Clipper
Total length of cord
IEC
Figure 2 – Measurement of supply cord length
5.5 Starting ability test

Oil the cutting system of the corded hair clipper or trimmer according to the instructions for

use. The corded hair clipper or trimmer is started three times at 0,9 times the rated voltage.

The hair clipper or trimmer shall come to a complete stop before it is restarted. The outcome

of starting for each time shall be recorded.

For battery-operated hair clippers or trimmers and rechargeable hair clippers or trimmers, the

starting ability test is not carried out.
5.6 Ability-to-cut test
All attachments are removed.

The clipper is fed into a specified hair strip with the stationary blade tooth plane being less

than 5 mm from, and parallel to, the hair strip surface (see Figure 3) at a maximum uniform

stroke speed so that 100 % of the hair across the blade's cutting width is cut. Try to find the

fastest time where the clipper is still able to cut 100 %.
---------------------- Page: 10 ----------------------
IEC 62863:2017 © IEC 2017 – 9 –
Housing
Moving blade
Stationary blade
Tooth plane
IEC
Key
A: direction of trimmer/clipper movement
Figure 3 – Stationary blade tooth plane parallel to the hair strip surface

At least 2 units are tested and at least 3 cutting times are measured for each unit. The time to

cut the hair strip in seconds for each test is recorded.

The cutting distance is 20 cm (from the start point to the end point). In addition, 5 cm of blank

distance is reserved on the hair strip to facilitate the cutting operation (see Figure 5).

The cutting width of the blade is shown in Figure 4 where
B = A + (≥2 cm)
Strip width (B)
≥ 1 cm Blade cutting width (A) ≥ 1 cm
IEC
Key
A: blade width
B: strip width
Figure 4 – Hair strip width
The hair strip width is equal to B with the following characteristics:

– a hair stitch density of approximately 25 stitches/cm and approximately (15 ± 3) hairs per

stitch (see Figure 5);
– a hair orientation angle of approximately 45° to 65° (angle α in Figure 6).
The length of the hair is approximately 20 mm.

The material of the strip hair can be artificial and the hair diameter is 70 µm to 110 µm.

---------------------- Page: 11 ----------------------
– 10 – IEC 62863:2017 © IEC 2017
Strip width B
Ending point
Starting point
IEC
Key
L: hair strip length = 25 cm
Cutting length = 20 cm
Blank distance = 5 cm
Figure 5 – Distribution of hairs on the hair strip
Artificial hair
≈ 20 mm
65°
45°
IEC
Figure 6 – Orientation and length of hair
5.7 Test of airborne acoustical noise
The test shall be carried out according to IEC 60704-2-8:1997.
NOTE The test set up is shown in Annex B.
The result of A-weighted sound power level is recorded.

5.8 Test of reliability of the mechanical /electrical connection between the adapter

and the cord/cordless rechargeable hair clipper or trimmer

The axis of both the pin of the adapter and the socket of the clipper or trimmer are kept in a

horizontal position and aligned with each other. The pin is inserted into the socket of the

clipper or trimmer and then the plug is pulled out of the socket with the maximum pull force

being measured and recorded. Then the pin is inserted into and pulled out of the socket of the

clipper or trimmer with the charger plugged into the supply mains. One cycle includes one

insertion and one extraction. Care should be taken not to pull on the cord.

The test is repeated and the pull force and the electrical connection shall be checked and

recorded at intervals of 60 cycles. The electrical connection is checked by observing the

Blank Cutting length
5 cm 20 cm
Hair strip length (L)
25 cm
---------------------- Page: 12 ----------------------
IEC 62863:2017 © IEC 2017 – 11 –

charging indicator, or the current/power meter if no charging indicator is present

(see Figure 7). When checking the electrical connection while charging, the cord is positioned

at multiple angles to verify no intermittent connection. The device shall not be switched on

during the test.
When 600 cycles are reached, the test is terminated.
Mains A/W
IEC
Figure 7 – Electrical connection diagram

5.9 Determination of the working minutes of a rechargeable hair clipper or trimmer

after full charging

Fully charge the device according to the instructions for use. Oil the cutting unit according to

the instructions for use. When it is fully charged, the hair clipper or trimmer shall be

disconnected from the power supply. Let the device rest and the rest period shall be at least 1

h and not exceed 24h.

Run the device according to the no-load test condition specified in 5.3 for 10 min. Switch off

the device for 10 min. Repeat these on-off cycles until it stops (r/min is zero). The

accumulated working minutes of the device are recorded.

5.10 Determination of energy consumption of battery-operated hair clipper or trimmer

The battery-operated hair clipper or trimmer is supplied from a DC supply with the voltage

equal to the battery’s rated voltage as specified in the instructions for use. Run the device

according to the no-load test condition specified in 5.3 for 1 min. Then start to measure the

total energy consumption for 10 min. The obtained energy consumption (W·h) is recorded.

5.11 Endurance test

5.11.1 The corded hair clipper or trimmer is supplied with the rated voltage and is operated

according to the no-load test condition specified in 5.3 for 10 min, then stopped and rested for

10 min. This cycle is repeated until the unit fails to operate o
...