Purpose: To identify the purpose and applicability of this standard and the exclusions from the scope.

Rationale: The scope excludes requirements for functional safety. Functional safety is addressed in IEC 61508-1. Because the scope includes computers that may control safety systems, functional safety requirements would necessarily include requirements for computer processes and software. The TC108 experts are experts in hardware safety, and have little or no expertise to properly address functional safety requirements.

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PDF Pages	PDF Title
4	FOREWORD
6	Clause 0 Introduction – Principles of this product safety standard Clause 1 Scope Clause 3 Terms and definitions
8	Clause 4 General requirements
11	Clause 5 Electrically-caused injury
13	Figures Figure 1 – Conventional time/current zones of effects of a.c. currents (15 Hz to 100 Hz) on persons for a current path corresponding to left hand to feet (see IEC/TS 60479-1:2005, Figure 20) Tables Table 1 – Time/current zones for a.c. 15 Hz to 100 Hzfor hand to feet pathway (see IEC/TS 60479-1:2005, Table 11)
14	Figure 2 – Conventional time/current zones of effects of d.c. currents on persons for a longitudinal upward current path (see IEC/TS 60479-1:2005, Figure 22) Table 2 – Time/current zones for d.c. for hand to feet pathway(see IEC/TS 60479-1:2005, Table 13)
15	Figure 3 – Illustration that limits depend on both voltage and current
17	Table 3 – Limits for steady-state voltages (see IEC 61201:2007)
18	Table 4 – Limit values of accessible capacitance (threshold of pain) – (IEC 61201:2007)
19	Table 5 – Total body resistances RT for a current path hand to hand, d.c.,for large surface areas of contact in dry condition
20	Figure 4 – Safeguards between an energy source and an ordinary person
21	Figure 5 – Safeguards between an energy source and an instructed person
22	Figure 6 – Safeguards between energy sources and a skilled person
29	Figure 7 – Illustration of transient voltages on paired conductor external circuits
30	Figure 8 – Illustration of transient voltages on coaxial-cable external circuits
32	Table 6 – Voltage drop across clearance and solid insulation in series
37	Figure 9 – Example illustrating accessible internal wiring
40	Figure 10 – Overview of protective conductors
42	Figure 11 – Example of a typical touch current measuring network
43	Clause 6 Electrically caused fire
47	Figure 12 – Possible safeguards against electrically-caused fire
49	Table 7 – Examples of application of various safeguards
50	Figure 13 – Fire clause flow chart
51	Table 8 – Basic safeguards against fire under normal operating conditionsand abnormal operating conditions
52	Table 9 – Supplementary safeguards against fire under single fault conditions
53	Table 10 – Method 1: Reduce the likelihood of ignition
54	Figure 14 – Prevent ignition flow chart
56	Figure 15 – Control fire spread summary 1
57	Figure 16 – Control fire spread summary 2
60	Table 11 – Method 2: Control fire spread
65	Figure 17 – Fire cone application to large component
66	Table 12 – Fire barrier and fire enclosure flammability requirements
69	Table 13 – Summary – Fire enclosure and fire barrier material requirements
71	Table 14 – Other flammability requirements
72	Clause 7 Chemically-caused injury
73	Table 15 – Control of chemical hazards
74	Figure 18 – Flowchart demonstrating the hierarchy of hazard management
75	Clause 8 Mechanically-caused injury Figure 19 – Model for chemical injury
79	Table 16 – Summary for 8.6
83	Clause 9 Thermal burn injury Figure 20 – Model for a burn injury
85	Figure 21 – Model for safeguards against thermal burn injury Figure 22 – Model for absence of a thermal hazard
86	Figure 23 – Model for presence of a thermal hazard with a physical safeguard in place Figure 24 – Model for presence of a thermal hazard with behavioural safeguard in place
90	Clause 10 Radiation
91	Table 17 – Protection against radiation
92	Figure 25 – Overview of operating modes Annex B Normal operating condition tests, abnormal operating condition tests and single fault condition tests
93	Annex D Test generators Annex E Test conditions for equipment containing audio amplifiers Annex F Equipment markings, instructions, and instructional safeguards
94	Annex G Components
98	Annex H Criteria for telephone ringing signals
99	Figure 26 – Current limit curves
100	Annex J Insulated winding wires for use without interleaved insulation Annex K Safety interlocks Annex L Disconnect devices
101	Annex M Batteries and fuel cells
102	Annex O Measurement of creepage distances and clearances Annex P Safeguards against entry of foreign objects, foreign liquids, and spillage of internal liquids Annex Q Interconnection with building wiring Annex R Limited short-circuit test Annex S Tests for resistance to heat and fire
103	Annex T Mechanical strength tests
105	Annex U Mechanical strength of CRTs and protection against the effects of implosion
106	Bibliography

Published By	Publication Date	Number of Pages
BSI	2011	110


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Status	Withdrawn
Title	Audio/video, information and communication technology equipment – Explanatory information related to IEC 62368-1
Publisher	BSI
Committee	EPL/108
Pages	110
Publication Date	2011-07-31
Withdrawn Date	2015-03-31
Replaced By	PD IEC/TR 62368-2:2015
ISBN	978 0 580 74051 0
Standard Number	PD IEC/TR 62368-2:2011
Identical National Standard Of	IEC TR 62368-2:2011
Descriptors	Communication equipment, Computers, Data processing, Video recording, Electronic equipment and components, Electrical components, Hazards, Audio equipment, Fire safety, Electrical safety, Television equipment, Safety measures
ICS Codes	35.020 - Information technology (IT) in general

BSI PD IEC/TR 62368-2:2011

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