Luminaires - Part 2-24: Particular requirements - Luminaires with limited surface temperatures

IEC 60598-2-24:2013 series specifies requirements for luminaires intended for use where the necessity of limited temperature on the outer surface exists, due to the risk of thermal effects, combustion or degradation of materials but where the risk of explosion in the atmosphere does not exist. The luminaires are for use with electric light sources on supply voltages not exceeding 1 000 V. This standard specifically excludes requirements for luminaires for use in explosive gas atmospheres and explosive dust atmospheres. This second edition cancels and replaces the first edition published in 1997. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) change of required degree of protection from IP6X to IP4X to harmonize with the international wiring rules;
b) temperature limits introduced for glass surface of any light source exposed to risk of dust.
This publication is to be read in conjunction with IEC 60598-1:2008.

Luminaires - Partie 2-24: Exigences particulières - Luminaires avec surfaces à températures limitées

La CEI 60598-2-24:2013, spécifie les exigences applicables aux luminaires prévus pour une utilisation qui nécessite de limiter la température de leurs surfaces extérieures, en raison du risque d'effets thermiques, de combustion ou de dégradation de matériaux, mais où le risque d'explosion dans l'atmosphère n'existe pas. Ces luminaires sont équipés avec des sources lumineuses électriques, pour des tensions d'alimentation ne dépassant pas 1000 V. La présente norme exclut spécifiquement les exigences pour les luminaires à utiliser dans des atmosphères gazeuses explosives et dans des atmosphères à poussières explosives. Cette deuxième édition annule et remplace la première édition parue en 1997. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) remplacement du degré de protection requis de l'IP6X à l'IP4X pour harmoniser avec les règles de câblage international.
b) des températures limites ont été introduites pour les surfaces vitrées de toutes les sources lumineuses exposées au risque de la poussière.
Cette publication doit être lue conjointement avec la CEI 60598-1:2008.

General Information

Status
Published
Publication Date
18-Jun-2013
Technical Committee
Current Stage
PPUB - Publication issued
Start Date
19-Jun-2013
Completion Date
19-Jun-2013
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IEC 60598-2-24
Edition 2.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Luminaires –
Part 2-24: Particular requirements – Luminaires with limited surface
temperatures
Luminaires –
Partie 2-24: Exigences particulières – Luminaires avec surfaces à températures
limitées
IEC 60598-2-24:2013
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60598-2-24
Edition 2.0 2013-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Luminaires –
Part 2-24: Particular requirements – Luminaires with limited surface
temperatures
Luminaires –
Partie 2-24: Exigences particulières – Luminaires avec surfaces à températures
limitées
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX J
ICS 29.140.40 ISBN 978-2-83220-867-0

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 – 60598-2-24 © IEC:2013
CONTENTS

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

24.1 Scope ...................................................................................................................... 5

24.2 Normative references .............................................................................................. 5

24.3 General test requirements........................................................................................ 5

24.4 Terms and definitions .............................................................................................. 5

24.5 Classification of luminaires ...................................................................................... 6

24.6 Marking ................................................................................................................... 6

24.7 Construction ............................................................................................................ 6

24.8 Creepage distances and clearances ......................................................................... 7

24.9 Provision for earthing ............................................................................................... 7

24.10 Terminals and electrical connections........................................................................ 7

24.11 External and internal wiring ...................................................................................... 7

24.12 Protection against electric shock .............................................................................. 7

24.13 Endurance test and thermal test............................................................................... 7

24.13.1 Temperature limits – normal operation ..................................................... 7

24.13.2 Temperature limits – abnormal operation ................................................. 8

24.13.3 Temperature limits – fault conditions ....................................................... 8

24.14 Resistance to dust, solid objects and moisture ......................................................... 8

24.15 Insulation resistance and electric strength ................................................................ 8

24.16 Resistance to heat, fire and tracking ........................................................................ 8

Figure 1 – Symbol for luminaires with limited surface temperatures ......................................... 6

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60598-2-24 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LUMINAIRES –
Part 2-24: Particular requirements –
Luminaires with limited surface temperatures
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

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

agreement between the two organizations.

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

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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 60598-2-24 has been prepared by subcommittee 34D: Luminaires,

of IEC technical committee 34: Lamps and related equipment.

This publication is intended to be read in conjunction with IEC 60598-1: Luminaires – Part 1:

General requirements and tests.

This second edition cancels and replaces the first edition published in 1997. It constitutes a

technical revision.

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

edition:

a) change of required degree of protection from IP6X to IP4X to harmonize with the

international wiring rules;

b) temperature limits introduced for glass surface of any light source exposed to risk of dust.

---------------------- Page: 5 ----------------------
– 4 – 60598-2-24 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
34D/1094/FDIS 34D/1100/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.

A list of all the parts in the IEC 60598 series, published under the general title Luminaires can

be found on the IEC website.

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

In this standard, the following print types are used:
– requirements: roman type.
– test specifications: italic type.
– notes: smaller roman type.

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

stability date indicated on the IEC web site 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 ----------------------
60598-2-24 © IEC:2013 – 5 –
LUMINAIRES –
Part 2-24: Particular requirements –
Luminaires with limited surface temperatures
24.1 Scope

This part of the IEC 60598 series specifies requirements for luminaires intended for use where

the necessity of limited temperature on the outer surface exists, due to the risk of thermal

effects, combustion or degradation of materials but where the risk of explosion in the

atmosphere does not exist. The luminaires are for use with electric light sources on supply

voltages not exceeding 1 000 V.

This standard specifically excludes requirements for luminaires for use in explosive gas

atmospheres and explosive dust atmospheres.
24.2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

IEC 60364-4-42, Low-voltage electrical installations – Part 4-42: Protection for safety –

Protection against thermal effects
IEC 60598-1, Luminaires – Part 1: General requirements and tests
ISO 4225:1994, Air quality – General aspects – Vocabulary
24.3 General test requirements

The provisions of Section 0 in IEC 60598-1 apply. The tests described in each appropriate

section of IEC 60598-1 shall be carried out in the order listed in this standard.

24.4 Terms and definitions

For the purposes of this document, the terms and definitions given in Section 1 of

IEC 60598-1 apply, as well as the following apply.
24.4.1
dust

small solid particles in the atmosphere which settle out under their own weight, but which may

remain suspended in air for some time (includes dust and grit as defined in ISO 4225)

24.4.2
explosive gas atmosphere

mixture with air, under atmospheric conditions, of flammable substances in the form of gas or

vapour which, after ignition, permits self sustaining flame propagation
[SOURCE: IEC 60050-426:2008, 426-01-07]
---------------------- Page: 7 ----------------------
– 6 – 60598-2-24 © IEC:2013
24.4.3
explosive dust atmosphere

a mixture with air, under atmospheric conditions, of flammable substances in the form of dust,

fibres or flyings which, after ignition, permits self-sustaining propagation
[SOURCE: IEC 60050-426:2008, 426-01-08]
24.5 Classification of luminaires

Luminaires shall be classified in accordance with the provisions of Section 2 of IEC 60598-1.

Additionally luminaires complying with this section are classified suitable for use in locations

specified in IEC 60364-4-42 as follows.
a) For use in environments where no unusual accumulation of dust is expected.

b) For use in environments where an accumulation of non-conductive dust on the luminaire

may be expected.

c) For use in environments where an accumulation of conductive dust on the luminaire may be

expected.
24.6 Marking

The provisions of Section 3 of IEC 60598-1 apply together with the following requirements.

24.6.1 Luminaires shall be marked with the symbol (see Figure 1). This marking shall be

visible and meet the requirements of 3.2 c) of IEC 60598-1.
Figure 1 – Symbol for luminaires with limited surface temperatures

24.6.2 From the manufacturers literature it shall be evident to which location the luminaire is

intended in accordance with the luminaires classification as given in 24.5 of this standard.

24.7 Construction

The provisions of Section 4 of IEC 60598-1 apply, together with the requirements of 24.7.1 and

24.7.2 below.

24.7.1 Luminaires shall be provided with an enclosure providing a degree of protection of at

least IP4X or in the presence of dust, IP5X or in the presence of conductive dust, IP6X.

For certain locations the international wiring rules may require at least IP5X or IP6X (see

IEC 60364-4-42).
Compliance is checked by inspection.
---------------------- Page: 8 ----------------------
60598-2-24 © IEC:2013 – 7 –

24.7.2 Surfaces where dust may accumulate and all surfaces greater than 7,5 mm wide and

non-vertical surfaces shall comply with the requirements of horizontal surfaces.

Vertical surfaces not complying with spacing requirements in 24.13 shall comply with the limits

for horizontal surfaces.
Compliance is checked by inspection.
24.8 Creepage distances and clearances
The provisions of Section 11 of IEC 60598-1 apply.
24.9 Provision for earthing
The provisions of Section 7 of IEC 60598-1 apply.
24.10 Terminals and electrical connections
The provisions of Sections 14 and 15 of IEC 60598-1 apply.
24.11 External and internal wiring
The provisions of Section 5 of IEC 60598-1 apply.
24.12 Protection against electric shock
The provisions of Section 8 of IEC 60598-1 apply.
24.13 Endurance test and thermal test

The provisions of Section 12 of IEC 60598-1 apply, together with the requirements of 24.13.1

to 24.13.3 below.

Luminaires with the symbol shall be subjected to the relevant tests given in 12.4, 12.5,

12.6 and 12.7 of Section 12 of IEC 60598-1 after the test(s) given in 9.2 but before the test(s)

given in 9.3 of Section 9 of IEC 60598-1 specified in 24.14 of this standard.

Where the gap between vertical surfaces is less than 30 mm, the temperature limit for

horizontal surfaces shall apply.
24.13.1 Temperature limits – Normal operation

For luminaires with the symbol, a temperature of 90 °C on all horizontal surfaces of the

luminaire exposed to the accumulation of dust shall not be exceeded, at 1,06 times the rated

voltage and, on all vertical external surfaces, the maximum temperature shall not exceed 150

°C at 1,06 times the rated voltage.

If a luminaire has an outer surface likely to be positioned against part of a building (wall or

similar), with a temperature higher than 90 °C, but not exceeding 150 °C, the luminaire shall be

provided with mounting instructi
...

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