IEC 62368-1:2014

Audio/video, information and communication technology equipment - Part 1: Safety requirements

IEC 62368-1:2014 deals with the safety of electrical and electronic equipment within the field of audio, video, information and communication technology, and business and office machines with a rated voltage not exceeding 600 V. This standard does not include requirements for performance or functional characteristics of equipment. Examples of equipment within the scope of this standard are given in Annex A. A rated voltage of 600 V is considered to include equipment rated at 400/690 V. This part of IEC 62368 is also applicable to: components and subassemblies intended for incorporation in this equipment. Such components and subassemblies need not comply with every requirement of the standard, provided that the complete equipment, incorporating such components and subassemblies, does comply; external power supply units intended to supply other equipment within the scope of this part of IEC 62368 and accessories intended to be used with equipment within the scope of this part of IEC 62368. This part of IEC 62368 does not apply to power supply systems which are not an integral part of the equipment, such as motor-generator sets, battery backup systems and distribution transformers. This part of IEC 62328 specifies safeguards for ordinary persons, instructed persons, and skilled persons. Additional requirements may apply for equipment that is clearly designed or intended for use by children or specifically attractive to children. This second edition cancels and replaces the first edition published in 2010. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of requirements for LEDs;
- new requirements for wall and ceiling mounting means;
- addition of acoustic shock requirements for personal music players;
- revision of the battery requirements, including new requirements for coin/button cell batteries and revision of the burn requirements. Key words: Audio/Video, Safeguards, Information, Communication The contents of the corrigenda of February 2015 and November 2015 have been included in this copy.

Equipements des technologies de l'audio/vidéo, de l'information et de la communication - Partie 1: Exigences de sécurité

L'IEC 62368-1:2014 s'applique à la sécurité de l'équipement électrique et électronique dans le domaine des technologies audio, vidéo, d'information et de communication, et des machines commerciales ou de bureau dont la tension assignée est inférieure ou égale à 600 V. La présente norme ne contient ni les exigences de performances ni les caractéristiques fonctionnelles de l'équipement. Des exemples d'équipement relevant du domaine d'application de la présente norme sont donnés dans l'Annexe A. Une tension assignée de 600 V est considérée inclure les équipements ayant une tension assignée de 400/690V. La présente partie de la CEI 62368 s'applique également: aux composants et aux sous-ensembles destinés à être intégrés dans cet équipement. Il n'est pas nécessaire que ces composants et sous-ensembles soient conformes à toutes les exigences présentées dans la norme, à condition que l'équipement complet, qui intègre ces composants et sous-ensembles, le soit, aux alimentations externes destinées à alimenter d'autres équipements entrant dans le domaine d'application de la présente partie de la CEI 62368 et aux accessoires destinés à être utilisés avec des équipements entrant dans le domaine d'application de la présente partie de la CEI 62368. La présente partie de la CEI 62368 ne s'applique pas aux systèmes d'alimentation électrique ne faisant pas partie intégrante de l'équipement, tels que les groupes convertisseurs, les systèmes de batterie de secours et les transformateurs de distribution. La présente partie de la CEI 62368 spécifie des protections pour les personnes ordinaires, les personnes averties et les personnes qualifiées. Des exigences supplémentaires peuvent s'appliquer aux équipements clairement conçus ou destinés à être utilisés par des enfants ou particulièrement attrayants pour les enfants. Cette deuxième édition annule et remplace la première édition publiée en 2010. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- addition des exigences pour les LED;
- nouvelles exigences pour les dispositifs montés sur un mur et un plafond;
- addition des exigences relatives aux chocs acoustiques pour les lecteurs de musique individuels;
- révision des exigences relatives aux piles et batteries, avec de nouvelles exigences concernant les piles et accumulateurs boutons;
- révision des exigences relatives aux brûlures. Mots-clés: Audio/Vidéo, Protection, Information, Communication Le contenu des corrigendas de février 2015 et novembre 2015 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 25-Feb-2014
• ICS: 29.080.10 - Insulators
• ICS: 29.240.20 - Power transmission and distribution lines
• ICS: 33.160.01 - Audio, video and audiovisual systems in general
• ICS: 35.020 - Information technology (IT) in general
• Technical Committee: TC 108 - Safety of electronic equipment within the field of audio/video, information technology and communication technology
• Drafting Committee: WG HBSDT - TC 108/WG HBSDT
• Current Stage: DELPUB - Deleted Publication
• Start Date: 04-Oct-2018
• Completion Date: 26-Oct-2025

Relations

• Corrected By: IEC 62368-1:2014/COR1:2015 - Corrigendum 1 - Audio/video, information and communication technology equipment - Part 1: Safety requirements
• Effective Date: 05-Sep-2023
• Corrected By: IEC 62368-1:2014/COR2:2015 - Corrigendum 2 - Audio/video, information and communication technology equipment - Part 1: Safety requirements
• Effective Date: 05-Sep-2023
• Revises: IEC 62368-1:2010 - Audio/video, information and communication technology equipment - Part 1: Safety requirements
• Effective Date: 05-Sep-2023
• Revises: IEC 62368-1:2010/COR1:2010 - Corrigendum 1 - Audio/video, information and communication technology equipment - Part 1: Safety requirements
• Effective Date: 05-Sep-2023
• Revised: IEC 62368-1:2018 - Audio/video, information and communication technology equipment - Part 1: Safety requirements
• Effective Date: 05-Sep-2023

Overview

IEC 62368-1:2014 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies safety requirements for audio/video, information, and communication technology equipment. This standard applies to electrical and electronic devices, including business and office machines, with a rated voltage not exceeding 600 V. Its primary focus is on safety, excluding performance or functional characteristics, ensuring protection against electrical shock, fire, mechanical injury, thermal hazards, and exposure to hazardous substances.

The standard embraces a product safety systems approach, addressing safeguards for ordinary users, instructed persons, and skilled personnel. It includes safety principles for components, subassemblies, external power supplies, and applicable accessories. Notably, IEC 62368-1:2014 replaces the earlier 2010 edition and introduces updated safety requirements such as safeguards for LEDs, wall and ceiling mounting, acoustic shock protection in personal music players, and revised battery safety regulations.

Key Topics

• Scope and Applicability
  Covers electrical equipment related to audio, video, information, and communication technology with rated voltages up to 600 V, including components and power supply units integrated into such equipment.

• Safety Principles and Models
  Establishes safety objectives based on preventing pain and injury from hazards including electrical shock, fire, mechanical harm, thermal burns, hazardous substances, and radiation.

• Energy Source Classification
  Defines categories for energy sources (Class 1, 2, and 3) and their associated safety limits to guide the design of safeguards.

• Hierarchical Safeguards
  Introduces multiple levels of protection including equipment safeguards, installation safeguards, personal safeguards, and behavioral safeguards depending on user expertise and environment.

• Specific Hazard Protections

  • Electrical shock and burn prevention through insulation, clearances, and creepage distances.
  • Fire prevention by controlling potential ignition sources and flammability of materials.
  • Protection from mechanical injury by safe construction and enclosure design.
  • Safety requirements for batteries, including coin/button cell batteries and guidance on lithium battery safety.
  • Acoustic shock protection especially in personal music players.

• Mounting and Installation Requirements
  New requirements for safely mounting equipment on walls and ceilings to prevent hazards.

• Testing and Compliance
  Specifies tests and compliance criteria ensuring consistent application of safety measures.

Applications

IEC 62368-1:2014 serves as the fundamental safety framework for manufacturers, designers, and testers of a wide range of audio, video, information, and communication technology equipment, including:

• Consumer electronics such as TVs, audio players, and personal music devices.
• Office and business machines including printers, computers, and communication devices.
• External power supply units and accessories intended for use with covered equipment.
• Components and subassemblies incorporated into larger systems.
• Equipment intended for professional, general, or limited user groups including children’s devices with special safeguards.

By following IEC 62368-1:2014 standards, manufacturers ensure that their products meet global safety requirements, reducing risk of injury or damage during normal or fault conditions, thus improving market acceptance and regulatory compliance.

Related Standards

• IEC 60950-1 – Safety of Information Technology Equipment (predecessor with a focus on IT, largely replaced by IEC 62368-1)
• IEC 60065 – Audio, Video and Similar Electronic Apparatus - Safety Requirements (older standard replaced by IEC 62368-1)
• IEC 62368-2 – Audio/video, information and communication technology equipment – Part 2: Hazard-based safety engineering
• IEC 62133 – Safety requirements for portable sealed secondary cells and batteries, related to battery safety in IEC 62368-1
• UL 62368-1 – US counterpart harmonized with IEC 62368-1 for product safety verification in North America

Understanding and implementing IEC 62368-1:2014 is essential for maintaining the safety integrity of modern audio/video and information communication technology devices, ensuring reduced hazards and compliance with rigorous international safety regulations.

Standards Content (Sample)

IEC 62368-1 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Audio/video, information and communication technology equipment –
Part 1: Safety requirements
Équipements des technologies de l'audio/vidéo, de l'information et de la
communication –
Partie 1: Exigences de sécurité

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IEC 62368-1 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Audio/video, information and communication technology equipment –

Part 1: Safety requirements
Équipements des technologies de l'audio/vidéo, de l'information et de la

communication –
Partie 1: Exigences de sécurité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 33.160.01, 35.020 ISBN 978-2-8322-1405-3

– 2 – 62368-1 © IEC:2014
CONTENTS
FOREWORD . 19

INTRODUCTION . 22

0 Principles of this product safety standard . 22

0.1 Objective . 22

0.2 Persons . 22

0.2.1 General . 22

0.2.2 Ordinary person . 22
0.2.3 Instructed person . 22
0.2.4 Skilled person . 22
0.3 Model for pain and injury . 22
0.4 Energy sources . 23
0.5 Safeguards . 24
0.5.1 General . 24
0.5.2 Equipment safeguard . 25
0.5.3 Installation safeguard . 25
0.5.4 Personal safeguard. 25
0.5.5 Behavioural safeguards . 26
0.5.6 Safeguards during ordinary or instructed person service
conditions . 27
0.5.7 Equipment safeguards during skilled person service
conditions . 27
0.5.8 Examples of safeguard characteristics . 27
0.6 Electrically-caused pain or injury (electric shock) . 28
0.6.1 Models for electrically-caused pain or injury . 28
0.6.2 Models for protection against electrically-caused pain or injury . 29
0.7 Electrically-caused fire . 30
0.7.1 Models for electrically-caused fire . 30
0.7.2 Models for protection against electrically-caused fire . 31
0.8 Injury caused by hazardous substances . 31
0.9 Mechanically-caused injury . 32
0.10 Thermally-caused injury (skin burn) . 32
0.10.1 Models for thermally-caused injury . 32

0.10.2 Models for protection against thermally-caused pain or injury . 33
0.11 Radiation-caused injury . 34
1 Scope . 36
2 Normative references . 37
3 Terms, definitions and abbreviations . 43
3.1 Energy source abbreviations . 43
3.2 Other abbreviations . 43
3.3 Terms and definitions . 44
3.3.1 Circuit terms . 46
3.3.2 Enclosure terms . 46
3.3.3 Equipment terms . 47
3.3.4 Flammability terms . 47
3.3.5 Insulation . 49
3.3.6 Miscellaneous . 49

62368-1 © IEC:2014 – 3 –
3.3.7 Operating and fault conditions . 51

3.3.8 Persons . 52

3.3.9 Potential ignition sources . 52

3.3.10 Ratings . 53

3.3.11 Safeguards . 53

3.3.12 Spacings . 55

3.3.13 Temperature controls . 55

3.3.14 Voltages and currents . 55

3.3.15 Classes of equipment with respect to protection from electric

shock . 56

3.3.16 Chemical terms . 57
3.3.17 Batteries . 57
4 General requirements . 59
4.1 General . 59
4.1.1 Application of requirements and acceptance of materials,
components and subassemblies . 59
4.1.2 Use of components . 59
4.1.3 Equipment design and construction . 59
4.1.4 Equipment installation . 60
4.1.5 Constructions and components not specifically covered . 60
4.1.6 Orientation during transport and use . 60
4.1.7 Choice of criteria . 60
4.1.8 Conductive liquids . 60
4.1.9 Electrical measuring instruments . 60
4.1.10 Temperature measurements . 60
4.1.11 Steady state conditions . 61
4.1.12 Hierarchy of safeguards . 61
4.1.13 Examples mentioned in the standard . 61
4.1.14 Tests on parts or samples separate from the end-product . 61
4.1.15 Markings and instructions . 61
4.2 Energy source classifications . 61
4.2.1 Class 1 energy source . 61
4.2.2 Class 2 energy source . 62
4.2.3 Class 3 energy source . 62
4.2.4 Energy source classification by declaration . 62

4.3 Protection against energy sources . 62
4.3.1 General . 62
4.3.2 Safeguards for protection of an ordinary person . 62
4.3.3 Safeguards for protection of an instructed person . 64
4.3.4 Safeguards for protection of a skilled person . 64
4.3.5 Safeguards in a restricted access area . 65
4.4 Safeguards . 66
4.4.1 Equivalent materials or components . 66
4.4.2 Composition of a safeguard . 66
4.4.3 Accessible parts of a safeguard . 66
4.4.4 Safeguard robustness . 66
4.5 Explosion . 68
4.5.1 General . 68
4.5.2 Requirements . 68

– 4 – 62368-1 © IEC:2014
4.6 Fixing of conductors . 69

4.6.1 Requirements . 69

4.6.2 Compliance criteria . 69

4.7 Equipment for direct insertion into mains socket-outlets . 69

4.7.1 General . 69

4.7.2 Requirements . 69

4.7.3 Compliance criteria . 70

4.8 Products containing lithium coin / button cell batteries . 70

4.8.1 General . 70

4.8.2 Instructional safeguard . 70

4.8.3 Construction . 70
4.8.4 Tests . 71
4.8.5 Compliance criteria . 71
4.9 Likelihood of fire or shock due to entry of conductive objects . 72
5 Electrically-caused injury . 72
5.1 General . 72
5.2 Classification and limits of electrical energy sources . 73
5.2.1 Electrical energy source classifications . 73
5.2.2 Electrical energy source ES1 and ES2 limits . 73
5.3 Protection against electrical energy sources . 79
5.3.1 General . 79
5.3.2 Accessibility to electrical energy sources and safeguards . 79
5.4 Insulation materials and requirements . 81
5.4.1 General . 81
5.4.2 Clearances . 87
5.4.3 Creepage distances . 97
5.4.4 Solid insulation . 101
5.4.5 Antenna terminal insulation. 110
5.4.6 Insulation of internal wire as a part of a supplementary
safeguard . 111
5.4.7 Tests for semiconductor components and for cemented joints . 111
5.4.8 Humidity conditioning . 111
5.4.9 Electric strength test . 112
5.4.10 Safeguards against transient voltages from external circuits . 115
5.4.11 Separation between external circuits and earth . 117

5.5 Components as safeguards . 118
5.5.1 General . 118
5.5.2 Capacitors and RC units . 118
5.5.3 Transformers . 120
5.5.4 Optocouplers . 120
5.5.5 Relays . 120
5.5.6 Resistors . 120
5.5.7 SPDs . 120
5.5.8 Insulation between the mains and an external circuit
consisting of a coaxial cable . 121
5.6 Protective conductor . 121
5.6.1 General . 121
5.6.2 Requirements for protective conductors . 121
5.6.3 Requirements for protective earthing conductors . 122

62368-1 © IEC:2014 – 5 –
5.6.4 Requirements for protective bonding conductors . 123

5.6.5 Terminals for protective conductors . 125

5.6.6 Resistance of the protective bonding system . 126

5.6.7 Reliable earthing . 128

5.7 Prospective touch voltage, touch current and protective conductor current. 128

5.7.1 General . 128

5.7.2 Measuring devices and networks . 128

5.7.3 Equipment set-up, supply connections and earth connections . 128

5.7.4 Earthed accessible conductive parts . 129

5.7.5 Protective conductor current . 129

5.7.6 Prospective touch voltage and touch current due to external
circuits . 130
5.7.7 Summation of touch currents from external circuits . 131
6 Electrically-caused fire . 133
6.1 General . 133
6.2 Classification of power sources (PS) and potential ignition sources (PIS) . 133
6.2.1 General . 133
6.2.2 Power source circuit classifications . 133
6.2.3 Classification of potential ignition sources . 136
6.3 Safeguards against fire under normal operating conditions and abnormal
operating conditions . 137
6.3.1 Requirements . 137
6.3.2 Compliance criteria . 138
6.4 Safeguards against fire under single fault conditions. 138
6.4.1 General . 138
6.4.2 Reduction of the likelihood of ignition under single fault
conditions in PS1 circuits . 138
6.4.3 Reduction of the likelihood of ignition under single fault
conditions in PS2 circuits and PS3 circuits . 138
6.4.4 Control of fire spread in PS1 circuits . 140
6.4.5 Control of fire spread in PS2 circuits . 140
6.4.6 Control of fire spread in a PS3 circuit . 141
6.4.7 Separation of combustible materials from a PIS . 142
6.4.8 Fire enclosures and fire barriers . 144
6.5 Internal and external wiring . 149
6.5.1 Requirements . 149

6.5.2 Compliance criteria . 149
6.5.3 Requirements for interconnection to building wiring. . 149
6.5.4 Compliance criteria . 150
6.6 Safeguards against fire due to the connection of additional equipment. 150
7 Injury caused by hazardous substances . 150
7.1 General . 150
7.2 Reduction of exposure to hazardous substances. 150
7.3 Ozone exposure . 150
7.4 Use of personal safeguards (PPE) . 150
7.5 Use of instructional safeguards and instructions . 151
7.6 Batteries and their protection circuits . 151
8 Mechanically-caused injury . 151
8.1 General . 151

– 6 – 62368-1 © IEC:2014
8.2 Mechanical energy source classifications . 151

8.2.1 General classification . 151

8.2.2 MS1 . 153

8.2.3 MS2 . 153

8.2.4 MS3 . 153

8.3 Safeguards against mechanical energy sources . 153

8.4 Safeguards against parts with sharp edges and corners . 153

8.4.1 Requirements . 153

8.4.2 Compliance criteria . 154

8.5 Safeguards against moving parts . 154

8.5.1 Requirements . 154
8.5.2 Instructional safeguard requirements . 154
8.5.3 Compliance criteria . 155
8.5.4 Special categories of equipment comprising moving parts . 155
8.5.5 High pressure lamps . 157
8.6 Stability of equipment . 158
8.6.1 Requirements . 158
8.6.2 Static stability . 159
8.6.3 Relocation stability test . 160
8.6.4 Glass slide test . 160
8.6.5 Horizontal force test and compliance criteria. 161
8.7 Equipment mounted to a wall or ceiling . 161
8.7.1 Requirements . 161
8.7.2 Test methods . 161
8.7.3 Compliance criteria . 163
8.8 Handle strength . 163
8.8.1 General . 163
8.8.2 Test method and compliance criteria . 163
8.9 Wheels or casters attachment requirements . 163
8.9.1 General . 163
8.9.2 Test method . 164
8.10 Carts, stands, and similar carriers . 164
8.10.1 General . 164
8.10.2 Marking and instructions . 164
8.10.3 Cart, stand or carrier loading test and compliance criteria . 165

8.10.4 Cart, stand or carrier impact test. 165
8.10.5 Mechanical stability . 165
8.10.6 Thermoplastic temperature stability . 166
8.11 Mounting means for rack mounted equipment . 166
8.11.1 General . 166
8.11.2 Requirements . 166
8.11.3 Mechanical strength test . 167
8.11.4 Mechanical strength test, 250 N, including end stops . 167
8.11.5 Compliance criteria . 167
8.12 Telescoping or rod antennas . 167
9 Thermal burn injury . 168
9.1 General . 168
9.2 Thermal energy source classifications . 168
9.2.1 General . 168

62368-1 © IEC:2014 – 7 –
9.2.2 TS1 . 168

9.2.3 TS2 . 168

9.2.4 TS3 . 168

9.2.5 Test method and compliance criteria . 168

9.2.6 Touch temperature levels . 169

9.3 Safeguards against thermal energy sources . 170

9.4 Requirements for safeguards . 170

9.4.1 Equipment safeguard . 170

9.4.2 Instructional safeguard . 170

10 Radiation . 170

10.1 General . 170
10.2 Radiation energy source classifications . 170
10.2.1 General classification . 170
10.2.2 RS1 . 172
10.2.3 RS2 . 172
10.2.4 RS3 . 172
10.3 Safeguards against laser radiation . 172
10.3.1 Requirements . 172
10.3.2 Compliance criteria . 172
10.4 Safeguards against visible, infra-red, and ultra-violet radiation . 173
10.4.1 General . 173
10.4.2 Instructional safeguard . 173
10.4.3 Compliance criteria . 174
10.5 Safeguards against x-radiation . 174
10.5.1 Requirements . 174
10.5.2 Compliance criteria . 174
10.5.3 Test method . 174
10.6 Safeguards against acoustic energy sources . 175
10.6.1 General . 175
10.6.2 Classification . 176
10.6.3 Measurement methods . 176
10.6.4 Protection of persons . 177
10.6.5 Requirements for listening devices (headphones, earphones,
etc.) . 177
Annex A (informative) Examples of equipment within the scope of this standard . 179

Annex B (normative) Normal operating condition tests, abnormal operating condition
tests and single fault condition tests . 180
B.1 General . 180
B.1.1 Introduction . 180
B.1.2 Test applicability . 180
B.1.3 Type of test . 180
B.1.4 Test samples . 180
B.1.5 Compliance by inspection of relevant data . 180
B.1.6 Temperature measurement conditions . 180
B.2 Normal operating conditions . 181
B.2.1 General . 181
B.2.2 Supply frequency . 181
B.2.3 Supply voltage . 181
B.2.4 Normal operating voltages . 182

– 8 – 62368-1 © IEC:2014
B.2.5 Input test . 182

B.2.6 Operating temperature measurement conditions . 183

B.2.7 Battery charging and discharging under normal operating

conditions . 183

B.3 Simulated abnormal operating conditions . 184

B.3.1 General . 184

B.3.2 Covering of ventilation openings . 184

B.3.3 DC mains polarity test . 185

B.3.4 Setting of voltage selector . 185

B.3.5 Maximum load at output terminals . 185

B.3.6 Reverse battery polarity . 185
B.3.7 Audio amplifier abnormal operating conditions . 185
B.3.8 Compliance criteria during and after abnormal operating
conditions . 185
B.4 Simulated single fault conditions . 185
B.4.1 General . 185
B.4.2 Temperature controlling device . 186
B.4.3 Motor tests . 186
B.4.4 Functional insulation . 186
B.4.5 Short-circuit and interruption of electrodes in tubes and
semiconductors . 187
B.4.6 Short-circuit or disconnection of passive components . 187
B.4.7 Continuous operation of components . 187
B.4.8 Compliance criteria during and after single fault conditions . 188
B.4.9 Battery charging and discharging under single fault conditions . 188
Annex C (normative) UV radiation . 189
C.1 Protection of materials in equipment from UV radiation . 189
C.1.1 General . 189
C.1.2 Requirements . 189
C.1.3 Test method and compliance criteria . 189
C.2 UV light conditioning test . 190
C.2.1 Test apparatus . 190
C.2.2 Mounting of test samples . 190
C.2.3 Carbon-arc light-exposure test . 190
C.2.4 Xenon-arc light-exposure test . 190
Annex D (normative) Test generators . 191

D.1 Impulse test generators . 191
D.2 Antenna interface test generator . 192
D.3 Electronic pulse generator . 192
Annex E (normative) Test conditions for equipment containing audio amplifiers . 193
E.1 Audio amplifier normal operating conditions . 193
E.2 Audio amplifier abnormal operating conditions . 194
Annex F (normative) Equipment markings, instructions, and instructional safeguards . 195
F.1 General . 195
F.2 Letter symbols and graphical symbols . 195
F.2.1 Letter symbols . 195
F.2.2 Graphical symbols . 195
F.2.3 Compliance criteria . 195
F.3 Equipment markings . 195

62368-1 © IEC:2014 – 9 –
F.3.1 Equipment marking locations . 195

F.3.2 Equipment identification markings . 196

F.3.3 Equipment rating markings . 196

F.3.4 Voltage setting device . 198

F.3.5 Markings on terminals and operating devices. 198

F.3.6 Equipment markings related to equipment classification . 199

F.3.7 Equipment IP rating marking . 200

F.3.8 External power supply output marking . 200

F.3.9 Durability, legibility and permanence of markings . 201

F.3.10 Test for the permanence of markings . 201

F.4 Instructions . 201
F.5 Instructional safeguards . 202
Annex G (normative) Components . 205
G.1 Switches . 205
G.1.1 General . 205
G.1.2 Requirements . 205
G.1.3 Test method and compliance criteria . 206
G.2 Relays . 206
G.2.1 Requirements . 206
G.2.2 Overload test . 207
G.2.3 Relay controlling connectors supplying power to other
equipment. 207
G.2.4 Test method and compliance criteria . 207
G.3 Protective devices
...