FprEN IEC 60598-2-24:2026

• Status: Not Published
• Publication Date: 06-Dec-2026
• ICS: 29.140.40 - Luminaires
• Technical Committee: CLC/TC 34 - 'Lamps and related equipment
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 04-Sep-2026
• Completion Date: 04-Sep-2026
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Ref Project: kSIST FprEN IEC 60598-2-24:2026 - Luminaires - Part 2-24: Particular requirements - Luminaires with limited surface temperatures

• Amended By: FprEN IEC 60598-2-24:2026/prAA:2026 - Luminaires - Part 2-24: Particular requirements - Luminaires with limited surface temperatures
• Effective Date: 19-Nov-2024
• Revises: EN 60598-2-24:2013 - Luminaires - Part 2-24: Particular requirements - Luminaires with limited surface temperatures
• Effective Date: 28-Feb-2023

FprEN IEC 60598-2-24:2026 is the Part 2-24 standard for luminaires with limited surface temperatures, published here through CLC in the IEC luminaires series. It specifies safety requirements for luminaires intended to limit surface temperatures in dusty locations, so it is relevant to manufacturers, test labs, specifiers, quality teams, and buyers selecting luminaires for those environments.

What does FprEN IEC 60598-2-24:2026 specify?

FprEN IEC 60598-2-24:2026 sets particular requirements for luminaires that use limited surface temperatures to reduce ignition risks from combustible dust or from material deposits on the luminaire. It applies to luminaires using electric light sources on supply voltages up to 1 000 V.

The document excludes luminaires for explosive gas atmospheres and explosive dust atmospheres. It is organized as a Part 2 document that works with IEC 60598-1, then adds clauses for classification, marking, construction, thermal testing, and connection details.

Annex	What it covers
Annex AAA	Informative schedule of amended clauses containing more serious or critical requirements that may require retesting

Main structure:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Terms and definitions
• Clause 4 - General requirements
• Clause 5 - Classification
• Clause 6 - Marking
• Clause 7 - Construction
• Clauses 8 to 13 - Wiring, earthing, electric shock protection, dust/moisture resistance, insulation, creepage distances and clearances
• Clause 14 - Endurance and thermal tests
• Clause 15 - Resistance to heat, fire and tracking
• Clauses 16 to 17 - Terminals and electrical connections

What are the key requirements of FprEN IEC 60598-2-24:2026?

FprEN IEC 60598-2-24:2026 focuses on keeping external surfaces cool enough in service and on making the intended use clear to installers. The practical result is that the luminaire has to be selected, marked, installed, and tested for the dusty location it is meant for.

Classification and intended use

Clause 5.101 classifies luminaires by the location they are intended for. The classification links the luminaire to dust conditions and to the relevant wiring rules, so the user must match the product to the site conditions instead of treating all dusty areas the same.

Marking and instructions

Clause 6 requires a symbol for luminaires with limited surface temperatures, and that symbol must remain visible after installation and with the lamp in place. The manufacturer’s instructions must identify the intended location, mounting positions, and use locations, because those details determine which surfaces can become dust-collecting upward-facing surfaces.

If mounting can create upward-facing external surfaces, the instructions must call for regular cleaning of dust deposits. In practice, this tells the installer and maintenance team where dust control is needed to keep surface temperatures within limits.

Enclosure protection and thermal design

Clause 7 requires an enclosure with the appropriate IP protection for dust conditions, and the protection includes the light source. The luminaire must also be constructed so that its permissible external surface temperatures are not exceeded.

Built-in control gear and other built-in devices must either be thermally protected with a temperature marking limit or be designed so that their failure will not push the upward-facing surfaces beyond the permitted limit. Where that protection is not provided by marking, the relevant built-in devices are tested in the luminaire under fault conditions.

Thermal testing and temperature limits

Clause 14 covers normal operation, abnormal operation, and failed-winding conditions. The key practical point is that upward-facing external surfaces are held to a stricter temperature limit than other external surfaces, and the same upward-facing limit applies in abnormal operation.

For certain fault cases in control gear, the clause requires the upward-facing external surfaces to remain within their permitted limit during the fault test. That matters to buyers and inspectors because the luminaire has to stay safe not only when operating normally but also under foreseeable failure conditions.

Clause order and existing products

Clause 4.102 sets the order in which the clauses are applied, which helps users follow the document in the correct sequence. Clause 4.101 also gives a transition rule for luminaires already assessed to the previous edition, allowing review against the amended clauses listed in Annex AAA.

What terms does FprEN IEC 60598-2-24:2026 define?

• dust - Small solid particles in air that settle under their own weight but can stay suspended for a time.
• conductive dust - Combustible dust with low electrical resistance, which increases the need for enclosure protection.
• explosive gas atmosphere - A gas or vapour mixture with air that can keep flame propagation going after ignition.
• explosive dust atmosphere - A dust, fibre, or flying mixture with air that can keep flame propagation going after ignition.
• upward facing external surface - An external surface that can collect dust because of the mounting position and therefore needs thermal limitation.
• combustible - Capable of being ignited and burned.

Who uses FprEN IEC 60598-2-24:2026?

This standard is used by luminaire manufacturers, test laboratories, conformity assessment teams, and technical specifiers working with dusty environments. It is also relevant to buyers and quality managers who need to check whether a luminaire is suitable for a location where dust accumulation or dust coating could create a fire risk.

Installers and maintenance teams use it indirectly through the manufacturer’s instructions, especially for mounting positions, installation location, and cleaning of dust deposits. Safety and compliance teams use it to decide whether a luminaire is appropriate for agricultural, industrial, or other dust-related locations covered by the referenced wiring rules.

What changed in FprEN IEC 60598-2-24:2026 from the previous edition?

This document replaces the second edition published in 2013 and is described as a technical revision. The stated changes are:

• clause numbers and structure aligned with IEC 60598-1
• improved terms and definitions
• more detailed classification of luminaires
• indication of mounting positions and use locations
• thermal protection of built-in control gear and other built-in devices required

Annex AAA adds that no requirements in this document are considered more onerous than in the previous edition.

Which standards are used with FprEN IEC 60598-2-24:2026?

• IEC 60598-1 - The general requirements and tests base document used together with this Part 2-24.
• IEC 60364-4-42 - Used for protection against thermal effects and for identifying dust-related installation environments.
• IEC 60364-7-705 - Used for requirements for agricultural and horticultural premises, including a location class with fire risk from combustible dust coating.
• ISO 4225:1994 - Provides the air-quality vocabulary used for the definition of dust.
• IEC 61347-1 - Used for the fault-condition test referenced when built-in control gear or other built-in devices are not thermally protected by marking.

What does the FprEN IEC 60598-2-24:2026 document contain?

FprEN IEC 60598-2-24:2026 contains a symbol for marking luminaires with limited surface temperatures, plus clauses for classification, marking, construction, thermal testing, and terminal arrangements. It also includes the clause sequence that controls how Part 1 and this Part 2-24 are applied together.

The document gives the instructions that manufacturers must provide for intended locations and mounting positions, because those instructions determine which surfaces become upward-facing and may need cleaning. It also includes the thermal test framework for normal operation, abnormal operation, and fault conditions.

Annex AAA lists amended clauses that may need retesting when products are reviewed against this revision.

SLOVENSKI STANDARD
oSIST prEN IEC 60598-2-24:2024
01-december-2024
Svetilke - 2-24. del: Posebne zahteve - Svetilke z omejeno površinsko temperaturo
Luminaires - Part 2-24: Particular requirements - Luminaires with limited surface
temperatures
Leuchten - Teil 2-24: Besondere Anforderungen - Leuchten mit begrenzter
Oberflächentemperatur
Luminaires - Partie 2-24: Exigences particulières - Luminaires avec surfaces à
températures limitées
Ta slovenski standard je istoveten z: prEN IEC 60598-2-24:2024
ICS:
29.140.40 Svetila Luminaires
oSIST prEN IEC 60598-2-24:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60598-2-24:2024

oSIST prEN IEC 60598-2-24:2024
34D/1745/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60598-2-24 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-10-18 2025-01-10
SUPERSEDES DOCUMENTS:
34D/1708/CD, 34D/1718A/CC
IEC SC 34D : LUMINAIRES
SECRETARIAT: SECRETARY:
United Kingdom Ms Shanti Conn
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights
of which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

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

PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.

oSIST prEN IEC 60598-2-24:2024
IEC 60598-2-24 © IEC 2024 2 34D/1745/CDV

1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________
4 LUMINAIRES –
5 Part 2-24: Particular requirements –
6 Luminaires with limited surface temperatures
7 FOREWORD
8 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
9 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
10 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
11 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
12 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
13 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
14 may participate in this preparatory work. International, governmental and non-governmental organizations
15 liaising with the IEC also participate in this preparation. IEC collaborates closely with the International
16 Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two
17 organizations.
18 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
19 consensus of opinion on the relevant subjects since each technical committee has representation from all
20 interested IEC National Committees.
21 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
22 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
23 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
24 misinterpretation by any end user.
25 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
26 transparently to the maximum extent possible in their national and regional publications. Any divergence between
27 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
28 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
29 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
30 services carried out by independent certification bodies.
31 6) All users should ensure that they have the latest edition of this publication.
32 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
33 members of its technical committees and IEC National Committees for any personal injury, property damage or
34 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
35 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
36 Publications.
37 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
38 indispensable for the correct application of this publication.
39 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
40 patent(s). IEC [takes no position concerning the evidence, validity or applicability of any claimed patent rights in
41 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s),
42 which may be required to implement this document. However, implementers are cautioned that this may not
43 represent the latest information, which may be obtained from the patent database available at
44 https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
46 IEC 60598-2-24 has been prepared by subcommittee 34D: Luminaires, of IEC technical committee
47 34: Lighting. It is an International Standard.
48 This third edition cancels and replaces the second edition,
49 published in 2013. This edition constitutes a technical revision.
51 This edition includes the following significant technical changes with respect to the previous edition:
52 a) the clause numbers and structure have been aligned with those of IEC 60598-1
53 b) improved terms and definitions
54 c) more detailed classification of luminaires
55 d) indication of luminaire mounting positions and use locations
56 e) thermal protection of built in control gear and other built-in devices required
58 The text of this International Standard is based on the following documents:

oSIST prEN IEC 60598-2-24:2024
IEC 60598-2-24 © IEC 2024 3 34D/1745/CDV

Draft Report on voting
XX/XX/FDIS XX/XX/RVD
61 Full information on the voting for its approval can be found in the report on voting indicated in the
62 above table.
63 The language used for the development of this International Standard, Technical is English.
64 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
65 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, and the
66 ISO/IEC Directives, JTC 1 Supplement available at www.iec.ch/members_experts/refdocs. The main
67 document types developed by IEC are described in greater detail at www.iec.ch/publications.
69 This Part 2-24 is to be used in conjunction with the latest edition of IEC 60598-1 and its
70 amendment(s). It was established on the basis of the tenth edition (20XX) of that standard.
72 NOTE  When “Part 1” is mentioned in this document, it refers to IEC 60598-1.
74 Where this document states "addition", "modification" or "replacement", the relevant text of Part 1 is to
75 be adapted accordingly.
76 Subclauses, notes, figures and tables additional to those in Part 1 are numbered starting from 101;
77 supplementary annexes are entitled AAA, AAB, etc.
78 A list of all parts in the IEC 60598 series, published under the general title Luminaires can be found
79 on the IEC website.
80 The committee has decided that the contents of this document will remain unchanged until the
81 stability date indicated on the IEC website under webstore.iec.ch in the data related to the specific
82 document. At this date, the document will be
83 • reconfirmed,
84 • withdrawn,
85 • replaced by a revised edition, or
86 amended.
oSIST prEN IEC 60598-2-24:2024
IEC 60598-2-24 © IEC 2024 4 34D/1745/CDV

88 LUMINAIRES –
89 Part 2-24: Particular requirements –
90 Luminaires with limited surface temperatures
91 1 Scope
92 This part of the IEC 60598 series specifies requirements for luminaires for which limited surface
93 temperatures are provided to counteract risks from combustible dusts (conductive or non-
94 conductive) or ignition of materials that can be deposited on luminaires. The luminaires are for
95 use with electric light sources on supply voltages not exceeding 1 000 V.
96 Note: The risk of thermal effects (combustion or degradation caused by the luminaire) to the mounting
97 surface is covered in Part 1 for all types of luminaires.
98 This document specifically excludes requirements for luminaires for use in explosive gas
99 atmospheres and explosive dust atmospheres.
100 2 Normative references
101 The following documents, in whole or in part, are normatively referenced in this document and
102 are indispensable for its application. For dated references, only the edition cited applies. For
103 undated references, the latest edition of the referenced document (including any amendments)
104 applies.
105 IEC 60364-4-42, Low-voltage electrical installations – Part 4-42: Protection for safety –
106 Protection against thermal effects
107 IEC 60364-7-705, Low-voltage electrical installations - Part 7-705: Requirements for special
108 installations or locations - Agricultural and horticultural premises
109 IEC 60598-1, Luminaires – Part 1: General requirements and tests
110 ISO 4225:1994, Air quality
...