IEC 61347-1:2024

IEC 61347-1 ®
Edition 4.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Controlgear for electric light sources – Safety –
Part 1: General requirements
Appareillages de commande pour les sources de lumière électriques – Sécurité –
Partie 1: Exigences générales
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IEC 61347-1 ®
Edition 4.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Controlgear for electric light sources – Safety –

Part 1: General requirements
Appareillages de commande pour les sources de lumière électriques – Sécurité –

Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.99  ISBN 978-2-8322-9057-6

– 2 – IEC 61347-1:2024 © IEC 2024
CONTENTS
FOREWORD . 8
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 14
4 General requirements . 25
4.1 General . 25
4.2 Transformers . 25
4.3 Information for controlgear design in light sources standards . 26
5 General notes on tests . 26
5.1 General . 26
5.2 Sample size . 26
5.3 Test sequence . 26
5.4 DC supplied controlgear . 27
6 Information and marking . 27
6.1 General . 27
6.2 Information and marking items . 27
6.3 Durability and legibility of marking . 31
6.4 Built-in controlgear without an enclosure and integral controlgear . 31
7 Terminals . 32
8 Earthing . 32
8.1 General . 32
8.2 Protective earthing . 32
8.2.1 Constructional requirements . 32
8.2.2 Earthing via printed circuit board tracks . 33
8.2.3 Earthing via independent controlgear . 33
8.2.4 Conditioning and compliance . 33
8.3 Functional earthing . 34
9 Protection against accidental contact with hazardous live parts . 34
9.1 General . 34
9.2 Capacitors . 34
9.3 ELV limits . 35
9.4 SELV and PELV touch currents . 35
9.5 Safety isolating controlgear which does not rely upon the luminaire
enclosure for protection against electric shock . 36
9.5.1 General . 36
9.5.2 Touch voltage limits . 36
9.5.3 Touch current limits . 37
10 Insulation resistance and electric strength . 37
10.1 General . 37
10.2 Insulation resistance . 38
10.2.1 Moisture treatment and testing. 38
10.2.2 Compliance . 38
10.3 Electric strength . 38
10.3.1 General . 38
10.3.2 AC test . 39

10.3.3 DC test . 39
10.3.4 General test conditions and compliance . 39
11 Fault conditions . 40
11.1 General . 40
11.2 Applicable fault conditions . 40
11.2.1 PCB tracks . 40
11.2.2 Electronic components. 40
11.2.3 Insulation layers . 40
11.3 Test power supply requirements . 40
11.4 Test procedure and compliance . 42
11.4.1 Test procedure . 42
11.4.2 Compliance . 43
12 Construction . 43
12.1 Use of fibrous materials . 43
12.2 Insulation between circuits and accessible parts . 44
12.2.1 General . 44
12.2.2 SELV or PELV circuits . 44
12.2.3 FELV circuits . 45
12.2.4 Other circuits . 45
12.3 Metal core printed circuits boards (MCPCBs) . 45
12.4 Interrupted DC output . 45
12.5 Control circuits . 45
12.6 Bridging of insulation . 46
12.6.1 Resistors . 46
12.6.2 Capacitors . 46
12.7 Built-in controlgear with basic insulation and built-in controlgear with double
insulation . 47
12.8 Transformers . 47
12.8.1 General . 47
12.8.2 Components . 48
12.9 Independent controlgear . 48
13 Creepage distances, clearances and distances through insulation . 48
13.1 General . 48
13.2 Creepage distances . 49
13.2.1 General . 49
13.2.2 Creepage distances for working frequencies not exceeding 30 kHz . 49
13.2.3 Creepage distances for working frequencies above 30 kHz . 50
13.2.4 Compliance with the required creepage distances . 51
13.3 Clearances . 52
13.3.1 General . 52
13.3.2 Clearances considering mains supply transient overvoltages . 53
13.3.3 Clearances not considering mains supply transient overvoltages . 54
13.3.4 Compliance with the required clearances . 57
13.4 Distances through insulation (DTI) . 57
13.5 Specific requirements for PCB . 57
13.5.1 General . 57
13.5.2 Reduction of creepage distances . 57
13.5.3 No minimum requirements for creepage distances and clearances . 58
13.6 Specific requirements for insulation layers . 58

– 4 – IEC 61347-1:2024 © IEC 2024
14 Screws, current-carrying parts and connections . 58
14.1 General . 58
14.2 Electrical connections . 58
14.3 Self-tapping and thread-cutting screws . 59
14.4 Locking against loosening . 59
14.5 Current-carrying parts . 59
14.6 Mechanical stress resistance . 60
15 Resistance to heat, fire and tracking . 61
15.1 Resistance to heat . 61
15.2 Resistance to flames and fire . 62
15.2.1 General . 62
15.2.2 Glow-wire test. 62
15.2.3 Needle-flame test . 62
15.2.4 Printed circuit boards . 63
15.3 Resistance to tracking . 63
16 Thermal requirements . 63
16.1 General . 63
16.1.1 Test specifications . 63
16.1.2 Built-in controlgear . 63
16.1.3 Integral controlgear . 64
16.1.4 Independent controlgear . 64
16.2 Normal operation . 65
16.3 Abnormal operation . 65
Annex A (normative) Test to establish whether a conductive part is a hazardous live
part. 69
A.1 General . 69
A.2 Touch voltage limits . 69
A.3 Touch current limits . 69
A.4 Compliance . 69
Annex B (normative) Temperature declared thermally protected controlgear . 70
B.1 General requirements . 70
B.1.1 Thermal protection means . 70
B.1.2 Circuit breaking of the thermal protection means . 70
B.2 General notes on tests . 70
B.3 Classification . 70
B.4 Limitation of heating. 70
B.4.1 Pre-selection test . 70
B.4.2 Functioning of the thermal protection means . 71
Annex C (normative) Thermal tests of thermally protected controlgear . 72
C.1 General . 72
C.2 Test chamber . 72
C.3 Controlgear operating temperatures . 72
C.4 Controlgear position in the test chamber . 72
C.5 Temperature measurements . 73
Annex D (normative) Draught-proof test chambers . 74
Annex E (normative) Tests requirements . 75
E.1 Ambient temperature and test room . 75
E.2 Test voltage and test frequency . 75

E.3 Magnetic effects. 75
E.4 Instrument characteristics . 75
E.4.1 Potential circuits . 75
E.4.2 Current circuits . 75
E.4.3 RMS measurements . 75
E.5 Test conditions . 76
E.5.1 Resistance measurement delays . 76
E.5.2 Electrical resistance of contacts and leads . 76
Annex F (informative) Schedule of more onerous requirements . 77
Annex G (informative) Conformity testing during manufacture . 78
G.1 General . 78
G.2 Routine testing . 78
G.3 Additional electric strength routine tests for controlgear with protection

against pollution using coating or potting material . 78
Annex H (normative) Requirements for insulation materials used for double or
reinforced insulation . 80
H.1 General requirements . 80
H.2 Insulating barrier test . 80
Annex I (normative) Reduction of creepage distances and clearances for coated or
potted controlgear . 81
I.1 General . 81
I.2 Reduction of creepage distances . 81
I.2.1 Creepage distances for working frequencies not exceeding 30 kHz . 81
I.2.2 Creepage distances for working frequencies above 30 kHz . 81
I.3 Conditioning and compliance . 83
I.3.1 Compliance . 83
I.3.2 Conditioning of the controlgear . 83
I.3.3 Moisture resistance and electric strength . 83
I.3.4 Impulse voltage dielectric test . 83
Annex J (informative) Example for U calculation . 85
p
Annex K (informative) Concept of creepage distances and clearances . 86
K.1 Basic concept considerations . 86
K.1.1 Creepage distances . 86
K.1.2 Clearances . 86
K.2 Reasons for setting up tables . 87
Annex L (informative) Overvoltage category III controlgear . 88
L.1 General . 88
L.2 Electric strength test voltages . 88
L.3 Clearances for controlgear not protected against pollution by coating or

potting materials . 88
L.4 Clearances for controlgear protected against pollution by coating or potting . 89
L.5 Distances through insulation . 89
L.6 Bridging by Y capacitors . 89
Annex M (informative) Information for luminaire design . 91
M.1 Controlgear to be tested together with the luminaire . 91
M.2 Earthing of built-in controlgear . 91
M.3 Insulation between controlgear circuits and accessible conductive parts of
luminaires . 91
M.4 Thermally protected controlgear . 91

– 6 – IEC 61347-1:2024 © IEC 2024
Annex N (normative) Touch current measurements . 94
N.1 General conditions . 94
N.2 Perception weighted measuring network . 95
N.3 Set-up and test sequence . 95
N.3.1 Touch currents between accessible parts and earth . 95
N.3.2 Touch currents between (different) accessible parts . 96
N.3.3 Touch currents between output and earth . 97
Annex O (informative) Information on document reorganization . 100
O.1 General . 100
O.2 Renumbering of clauses and annexes . 100
O.3 Renumbering of figures . 102
O.4 Renumbering of tables . 103
O.5 Rearrangement of marking and information items . 103
Bibliography . 105

Figure 1 – Test circuit (default) . 41
Figure 2 – Test circuit (for controlgear provided with internal protection that supports
selectivity) . 41
Figure 3 – Determination of creepage distances . 49
Figure 4 – Determination of clearances (general) . 52
Figure 5 – Determination of clearances (guidance on Table 15 and Table 16) . 53
Figure 6 – Screw type examples . 59
Figure 7 – Ball-pressure apparatus . 62
Figure 8 – Test arrangement for heating test . 64
Figure C.1 – Example of a heating test chamber for thermally protected controlgear . 73
Figure H.1 – Test electrode . 80
Figure J.1 – Example for the calculation of U . 85
p
Figure M.1 – Example of a controlgear insulation . 92
Figure N.1 – Measuring network (perception weighted) . 95
Figure N.2 – Test configuration for touch currents between accessible parts and earth . 96
Figure N.3 – Test configuration for touch currents between different accessible parts . 97
Figure N.4 – Test configuration for touch currents between output and earth . 98

Table 1 – Required rated impulse withstand voltage of equipment . 23
Table 2 – Marking according to installation type . 27
Table 3 – Symbols according to output isolation type . 28
Table 4 – Voltage steps . 30
Table 5 – Further markings . 31
Table 6 – ELV limits . 35
Table 7 – Touch current limits . 36
Table 8 – SELV touch voltage limits . 36
Table 9 – PELV touch voltage limits . 37
Table 10 – Electric strength test voltages. 39
Table 11 – Required number and type of Y capacitors . 47
Table 12 – Creepage distances – Working frequencies not exceeding 30 kHz . 50

Table 13 – Creepage distances – Working frequencies above 30 kHz . 51
Table 14 – Clearances considering mains supply transient overvoltages . 53
Table 15 – Clearances without considering mains supply transient overvoltages –
Basic or supplementary insulation . 55
Table 16 – Clearances without considering mains supply transient overvoltages –

Reinforced insulation . 56
Table 17 – Minimum creepage distances on printed circuit boards (PCBs) . 58
Table 18 – Torque tests on screws . 60
Table 19 – Values of maximum temperatures in normal use . 65
Table 20 – Maximum temperatures under abnormal operation . 66
Table 21 – Values of T and k for fuses . 67
Table G.1 – Minimum values for electrical routine tests . 79
Table I.1 – Creepage distances – Working frequencies not exceeding 30 kHz (coated
or potted controlgear) . 81
Table I.2 – Creepage distances – Working frequencies above 30 kHz (coated or
potted controlgear) . 82
Table I.3 – Impulse withstand test voltages . 84
Table L.1 – Electric strength test voltages for overvoltage category III controlgear. 88
Table L.2 – Impulse withstand test voltages for overvoltage category III coated or

potted controlgear . 89
Table L.3 – Overview of required Y capacitors . 90
Table M.1 – Insulation requirements between live parts and accessible conductive
parts for different luminaire constructions . 93
Table N.1 – Test sequence according to Figure N.2, Figure N.3 and Figure N.4 . 99
Table O.1 – Renumbering of clauses . 101
Table O.2 – Renumbering of annexes . 102
Table O.3 – Renumbering of figures. 103
Table O.4 – Renumbering of tables . 103
Table O.5 – Rearrangement of marking and information items . 104

– 8 – IEC 61347-1:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONTROLGEAR FOR ELECTRIC LIGHT SOURCES –
SAFETY –
Part 1: General requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec. IEC shall
not be held responsible for identifying any or all such patent rights.
IEC 61347-1 has been prepared by subcommittee 34C: Auxiliaries for lamps, of IEC technical
committee 34: Lighting. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2015 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) complete review of document structure, including but not limited to what is individually
described under items b) to s);
b) removal of requirements for electromagnetic controlgear;

c) addition of more specific requirements for control circuit insulation and corresponding
marking;
d) merging of thermal test requirements for transformers into a new Clause 16;
e) clarification of specifications for the moisture resistance test;
f) update of the normative reference to standards of the transformer series IEC 61558;
g) correction of the normative reference for PCB testing with respect to flames and fire;
h) update of further normative references where appropriate;
i) allowance of an alternative DC electric strength test;
j) addition of specific provisions for the use of bridging capacitors;
k) update of fire hazard testing requirements;
l) introduction of requirements for PELV applications;
m) clearance distances now generally based on peak instead of RMS voltage values;
n) introduction of a new type of protected emergency lighting controlgear;
o) review and clarification of touch current and voltage requirements;
p) clarification of the test sequence for independent controlgear with respect to the application
of the IEC 60598 series versus the IEC 61347 series;
q) introduction of reduced touch voltages and currents for interrupted DC voltage applications
or pulse width modulation (PWM);
r) changes concerning the recommendations for electric strength routine testing;
s) merging of requirements for safety isolating controlgear from former Annex L into the main
body of the document;
t) introduction of Annex N intended to address touch current measurement;
u) introduction of Annex O intended to provide information on document reorganization.
The text of this International Standard is based on the following documents:
Draft Report on voting
34C/1596/FDIS 34C/1604/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/publications.
This document is to be used in conjunction with the appropriate part of the IEC 61347-2 series.
NOTE In this document, the following print type is used:
– compliance statements: in italic type.
A list of all parts in the IEC 61347 series, published under the general title Controlgear for
electric light sources – Safety, can be found on the IEC website.
Future documents in this series will carry the new general title as cited above. Titles of existing
documents in this series will be updated at the time of the next edition.

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