Household and similar electrical appliances - Safety - Part 2-99: Particular requirements for commercial electric hoods

IEC 60335-2-99:2021 is available as IEC 60335-2-99:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60335-2-99:2021 deals with the safety of electrically operated commercial hoods intended for installation above commercial cooking appliances such as ranges, griddles, griddle grills and deep fat fryers, their rated voltage being not more than 250 V for single phase hoods connected between one phase and neutral, and 480 V for other hoods. Only single complete units and hoods supplied as separate parts which when assembled form a complete working hood, incorporating a fan, are within the scope of the standard.
The hood may be used above one or more appliance or types of appliances.
The following extraction systems are within the scope of this standard:
- back-draft ventilation systems;
- down-draft ventilation systems;
- fume extraction modules.
These appliances are not intended for household and similar purposes. They are used in areas not open to the public, for example in kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries and butcheries.
As far as is practicable, this standard deals with the common hazards presented by these types of appliances.
Attention is drawn to the fact that:
- for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can be necessary;
- in many countries additional requirements including ventilation requirements are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities.
This standard does not apply to:
- domestic range hoods (IEC 60335-2-31);
- purpose-built hoods, although this standard can be used as a guide (a purpose-built hood is either constructed on-site or specially constructed in the factory and is not mass produced);
- appliances not incorporating a fan;
- appliances designed exclusively for industrial purposes;
- appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
- battery-operated appliances.
This second edition cancels and replaces the first edition published in 2003 and Amendment 1:2017. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) the text has been aligned with IEC 60335-1:2020;
b) some notes have been converted to normative text (Clause 1, 11.7, 22.102, 22.104, 27.2, 30.101);
c) exclusion of battery-operated appliances and appliances used in areas open to the public (Clause 1);
d) addition of requirement for appliances incorporating means for ionizing air (32.101);
e) conciliation of the text of IEC 60335-2-99 with other standards under IEC/TC61/MT32.
This Part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments unless that edition precludes it; in that case, the latest edition that does not preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.

Appareils électrodomestiques et analogues - Sécurité - Partie 2-99: Exigences particulières pour les hottes de cuisine électriques à usage commercial

IEC 60335-2-99:2021 est disponible sous forme de IEC 60335-2-99:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60335-2-99:2021 traite de la sécurité des hottes électriques à usage commercial destinées à être installées au-dessus des appareils de cuisson à usage commercial, tels que les cuisinières, les plaques à griller et les friteuses électriques, dont la tension assignée est inférieure ou égale à 250 V pour les hottes monophasées raccordées entre un conducteur de phase et le conducteur de neutre et à 480 V pour les autres hottes. Seules les unités complètes uniques et les hottes fournies en tant que parties séparées qui, lorsqu'elles sont assemblées, constituent une hotte de travail complète, avec un ventilateur incorporé, relèvent du domaine d'application de la présente norme.
La hotte peut être utilisée au-dessus d'un ou de plusieurs appareils ou types d'appareils.
La liste suivante répertorie les exemples de systèmes d'extraction qui relèvent du domaine d'application de la présente norme:
- systèmes de ventilation à flux montant;
- systèmes de ventilation à flux descendant;
- modules d'extraction de fumée.
Ces appareils ne sont pas destinés à un usage domestique ou analogue. Ils sont utilisés dans des zones non ouvertes au public, par exemple dans les cuisines de restaurants, les cantines, les hôpitaux et les entreprises commerciales, telles que les boulangeries et les boucheries.
Dans la mesure du possible, la présente norme traite des dangers courants que présentent ces types d'appareils.
L'attention est attirée sur le fait que:
- pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences supplémentaires peuvent être nécessaires;
- dans de nombreux pays, des exigences supplémentaires, y compris des exigences de ventilation, sont spécifiées par les organismes nationaux de la santé, par les organismes nationaux responsables de la protection des travailleurs et par des organismes similaires.
La présente norme ne s'applique pas:
- aux hottes de cuisine à usage domestique (IEC 60335-2-31);
- aux hottes spécialisées même si la présente norme peut être utilisée comme guide (une hotte spécialisée est soit construite sur site soit spécialement construite en usine et n'est pas produite en série);
- aux hottes qui ne comportent pas de ventilateur;
- aux appareils prévus exclusivement pour des usages industriels;
- aux appareils destinés à être utilisés dans des locaux qui présentent des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz);
- aux appareils alimentés par batteries.
Cette deuxième édition annule et remplace la première édition parue en 2003 et son Amendement 1:2017. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) alignement du texte sur l'IEC 60335-1:2020;
b) conversion en texte normatif de certaines notes (Article 1, 11.7, 22.102, 22.104, 27.2, 30.101);
c) exclusion des appareils alimentés par batteries et des appareils utilisés dans des lieux ouverts au public (Article 1);
d) ajout de l'exigence pour les appareils qui incorporent des dispositifs d'ionisation de l'air (32.101);
e) alignement du texte de l'IEC 60335-2-99 sur d'autres normes sous l'IEC/TC61/MT32.
La présente Partie 2 doit être utilisée conjointement avec la dernière édition de l'IEC 60335-1 et ses amendements, sauf si cette édition l'exclut. Dans ce cas, la dernière édition qui n'exclut pas la présente Partie 2 est utilisée. Elle a été établie sur la base de la sixième édition (2020) de cette norme.

General Information

Status
Published
Publication Date
11-Nov-2021
Current Stage
PPUB - Publication issued
Completion Date
12-Nov-2021
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IEC 60335-2-99
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-99: Particular requirements for commercial electric hoods
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-99: Exigences particulières pour les hottes de cuisine électriques
à usage commercial
IEC 60335-2-99:2021-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60335-2-99
Edition 2.0 2021-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-99: Particular requirements for commercial electric hoods
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-99: Exigences particulières pour les hottes de cuisine électriques
à usage commercial
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.040.20 ISBN 978-2-8322-1045-5

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 60335-2-99:2021 © IEC 2021
CONTENTS

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

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

4 General requirement ........................................................................................................ 9

5 General conditions for the tests ....................................................................................... 9

6 Classification ................................................................................................................... 9

7 Marking and instructions .................................................................................................. 9

8 Protection against access to live parts ........................................................................... 10

9 Starting of motor-operated appliances ........................................................................... 11

10 Power input and current ................................................................................................. 11

11 Heating .......................................................................................................................... 11

12 Charging of metal-ion batteries ...................................................................................... 12

13 Leakage current and electric strength at operating temperature ..................................... 12

14 Transient overvoltages .................................................................................................. 12

15 Moisture resistance ....................................................................................................... 12

16 Leakage current and electric strength ............................................................................ 13

17 Overload protection of transformers and associated circuits .......................................... 13

18 Endurance ..................................................................................................................... 13

19 Abnormal operation ....................................................................................................... 13

20 Stability and mechanical hazards ................................................................................... 14

21 Mechanical strength ...................................................................................................... 14

22 Construction .................................................................................................................. 14

23 Internal wiring ................................................................................................................ 15

24 Components .................................................................................................................. 15

25 Supply connection and external flexible cords ............................................................... 15

26 Terminals for external conductors .................................................................................. 16

27 Provision for earthing .................................................................................................... 16

28 Screws and connections ................................................................................................ 16

29 Clearances, creeping distances and solid insulation ...................................................... 17

30 Resistance to heat and fire ............................................................................................ 17

31 Resistance to rusting ..................................................................................................... 18

32 Radiation, toxicity and similar hazards ........................................................................... 18

Annexes ............................................................................................................................... 19

Annex B (normative) Battery-operated appliances, separable batteries and

detachable batteries for battery-operated appliances ............................................................ 20

Annex P (informative) Guidance for the application of this standard to appliances used

in tropical climates ................................................................................................................ 21

Bibliography .......................................................................................................................... 22

Table 101 – Assembling torques for screwed connections providing earthing continuity ........ 17

---------------------- Page: 4 ----------------------
IEC 60335-2-99:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-99: Particular requirements for commercial electric hoods
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.

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

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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.

IEC 60335-2-99 has been prepared by IEC technical committee 61: Safety of household and

similar electrical appliances. It is an International Standard.
This second edition cancels and replaces the first edition published in 2003 and
Amendment 1:2017. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) the text has been aligned with IEC 60335-1:2020;

b) some notes have been converted to normative text (Clause 1, 11.7, 22.102, 22.104, 27.2,

30.101);

c) exclusion of battery-operated appliances and appliances used in areas open to the public

(Clause 1);

d) addition of requirement for appliances incorporating means for ionizing air (32.101);

e) conciliation of the text of IEC 60335-2-99 with other standards under IEC/TC61/MT32.

---------------------- Page: 5 ----------------------
– 4 – IEC 60335-2-99:2021 © IEC 2021
The text of this International Standard is based on the following documents:
Draft Report on voting
61/6371/FDIS 61/6421/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 60335 series, published under the general title Household and

similar electrical appliances – Safety, can be found on the IEC website.

This Part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its

amendments unless that edition precludes it; in that case, the latest edition that does not

preclude it is used. It was established on the basis of the sixth edition (2020) of that standard.

NOTE 1 When "Part 1" is mentioned in this standard, it refers to IEC 60335-1.

This Part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to convert

that publication into the IEC standard: Particular requirements for commercial electric hoods.

When a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies as

far as is reasonable. When this standard states "addition", "modification" or "replacement", the

relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:

– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;

– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including

those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
notes: in small 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.

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

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 60335-2-99:2021 © IEC 2021 – 5 –

NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing

organizations may need a transitional period following publication of a new, amended or revised IEC publication in

which to make products in accordance with the new requirements and to equip themselves for conducting new or

revised tests.

It is the recommendation of the committee that the content of this publication be adopted for implementation nationally

not earlier than 12 months or later than 36 months from the date of publication.
The following differences exist in the countries indicated below.
– 6.1: Class 01 hoods are allowed (Japan).
– 13.2: Leakage current limits are different (Japan).
– 16.2: Leakage current limits are different (Japan).
---------------------- Page: 7 ----------------------
– 6 – IEC 60335-2-99:2021 © IEC 2021
INTRODUCTION

It has been assumed in the drafting of this international standard that the execution of its

provisions is entrusted to appropriately qualified and experienced persons.

Guidance documents concerning the application of the safety requirements for appliances can

be accessed via TC 61 supporting documents on the IEC website
https://www.iec.ch/tc61/supportingdocuments

This information is given for the convenience of users of this International Standard and does

not constitute a replacement for the normative text in this standard.

This standard recognizes the internationally accepted level of protection against hazards such

as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal

use taking into account the manufacturer's instructions. It also covers abnormal situations that

can be expected in practice.

This standard takes into account the requirements of IEC 60364 as far as possible so that there

is compatibility with the wiring rules when the appliance is connected to the supply mains.

However, national wiring rules may differ.

If an appliance within the scope of this standard also incorporates functions that are covered

by another Part 2 of IEC 60335, the relevant Part 2 is applied to each function separately, as

far as is reasonable. If applicable, the influence of one function on the other is taken into

account.

When a Part 2 standard does not include additional requirements to cover hazards dealt with

in Part 1, Part 1 applies.

NOTE 1 This means that the technical committees responsible for the Part 2 standards have determined that it is

not necessary to specify particular requirements for the appliance in question over and above the general

requirements.

This standard is a product family standard dealing with the safety of appliances and takes

precedence over horizontal and generic standards covering the same subject.

NOTE 2 Horizontal publications, basic safety publications and group safety publications covering a hazard are not

applicable since they have been taken into consideration when developing the general and particular requirements

for the IEC 60335 series of standards.

An appliance that complies with the text of this standard will not necessarily be considered to

comply with the safety principles of the standard if, when examined and tested, it is found

to have other features that impair the level of safety covered by these requirements.

An appliance employing materials or having forms of construction differing from those detailed

in the requirements of this standard may be examined and tested according to the intent of the

requirements and, if found to be substantially equivalent, may be considered to comply with the

standard.
NOTE 3 Standards dealing with non-safety aspects of household appliances are:
– IEC standards published by TC 59 concerning methods for measuring performance;

– CISPR 11, CISPR 14-1 and relevant IEC 61000-3 series standards concerning electromagnetic emissions;

– CISPR 14-2 concerning electromagnetic immunity;
– IEC standards published by TC 111 concerning environmental matters.
---------------------- Page: 8 ----------------------
IEC 60335-2-99:2021 © IEC 2021 – 7 –
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-99: Particular requirements for commercial electric hoods
1 Scope
This clause of Part 1 is replaced by the following.

This part of IEC 60335 deals with the safety of electrically operated commercial hoods intended

for installation above commercial cooking appliances such as ranges, griddles, griddle grills

and deep fat fryers, their rated voltage being not more than 250 V for single phase hoods

connected between one phase and neutral, and 480 V for other hoods. Only single complete

units and hoods supplied as separate parts which when assembled form a complete working

hood, incorporating a fan, are within the scope of the standard.
The hood may be used above one or more appliance or types of appliances.
The following extraction systems are within the scope of this standard:
– back-draft ventilation systems;
– down-draft ventilation systems;
– fume extraction modules.

These appliances are not intended for household and similar purposes. They are used in areas

not open to the public, for example in kitchens of restaurants, canteens, hospitals and in

commercial enterprises such as bakeries and butcheries.

As far as is practicable, this standard deals with the common hazards presented by these types

of appliances.
Attention is drawn to the fact that:

– for appliances intended to be used in vehicles or on board ships or aircraft, additional

requirements can be necessary;

– in many countries additional requirements including ventilation requirements are specified

by the national health authorities, the national authorities responsible for the protection of

labour and similar authorities.
This standard does not apply to:
– domestic range hoods (IEC 60335-2-31);

– purpose-built hoods, although this standard can be used as a guide (a purpose-built hood

is either constructed on-site or specially constructed in the factory and is not mass

produced);
– appliances not incorporating a fan;
– appliances designed exclusively for industrial purposes;

– appliances intended to be used in locations where special conditions prevail, such as the

presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– battery-operated appliances.
---------------------- Page: 9 ----------------------
– 8 – IEC 60335-2-99:2021 © IEC 2021
2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:

IEC 60335-2-65:2002, Household and similar electrical appliances – Safety – Part 2-65:

Particular requirements for air-cleaning appliances
IEC 60335-2-65:2002/AMD1:2008
IEC 60335-2-65:2002/AMD2:2015

ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel – Part 1:

Bolts, screws and studs with specified property classes – Coarse thread and fine pitch thread

ISO 3506-1, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners

– Part 1: Bolts, screws and studs with specified grades and property classes

ISO 3506-2, Fasteners – Mechanical properties of corrosion-resistant stainless steel fasteners

– Part 2: Nuts with specified grades and property classes

ISO 3506-3, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 3: Set

screws and similar fasteners not under tensile stress

ISO 3506-4, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 4:

Tapping screws
3 Terms and definitions
This clause of Part 1 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.4 Addition:

Note 101 to entry The rated power input is the sum of the power inputs of all the individual elements in the

appliance that can be on at one time; where several of such combinations are possible, the one giving the highest

power input is used in determining the rated power input.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions:

The appliance is operated after installation in accordance with the instructions, except that it is

not connected to a duct.

Appliances intended to be used in combination with other appliances are tested in combination

with the other appliances in operation. Appliances that are not interlocked with other appliances

are also tested with the other appliances in operation and the fan switched off.
___________

There exists a consolidated edition 2.2:2015 that includes edition 2 and its Amendment 1 and Amendment 2.

---------------------- Page: 10 ----------------------
IEC 60335-2-99:2021 © IEC 2021 – 9 –
3.5 Definitions relating to types of appliances
3.5.101
hood

motor-operated appliance intended to collect and remove contaminated air from catering

appliances

Note 1 to entry: The contaminated air may pass through filter systems and be discharged back into the room or

removed from the room.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable except as follows.
6.1 Replacement:
Appliances shall be class I with respect to protection against electric shock.
Compliance is checked by inspection and by the relevant tests.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:

Appliances shall be marked on or near the lampholder with the maximum power input of

replaceable illumination lamps as follows:
lamp max..... W
The word "lamp" may be replaced by symbol IEC 60417-5012 (2002-10).
7.12 Addition:
The instructions for use shall state the substance of the following:

– there shall be adequate air intake into the room when the appliance is used at the same

time with appliances burning gas or other fuels;
– that filters must be cleaned regularly;

– there is a fire risk if cleaning is not carried out in accordance with the instructions;

– do not flambé under the appliance.

Instructions for user maintenance, for example the method and frequency of cleaning, shall

also be given. They shall include a statement that the appliance is not to be cleaned with a

water jet or a steam cleaner.
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The instructions shall include the substance of the following:

These appliances are intended to be used for commercial applications, for example in

kitchens of restaurants, canteens, hospitals and in commercial enterprises such as bakeries,

butcheries, etc., but not for continuous mass production of food.

If the manufacturer wants to limit the use of the appliance to less than the above, this has to be

clearly stated in the instructions.
Modification:

The instruction concerning persons (including children) with reduced physical, sensory or

mental capabilities or lack of experience and knowledge and children playing with the appliance

is not applicable.
7.12.1 Replacement:

The appliance shall be accompanied by instructions detailing any special precautions necessary

for installation. The instructions for installation shall state:

– the minimum distance between the appliance and the lowest part of the appliance;

– that regulations concerning the air intake and discharge of exhaust air have to

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