IEC 60950-1:2005/AMD2:2013

Amendment 2 - Information technology equipment - Safety - Part 1: General requirements

Amendement 2 - Matériels de traitement de l'information - Sécurité - Partie 1: Exigences générales

General Information

• Status: Withdrawn
• Publication Date: 27-May-2013
• Withdrawal Date: 28-Mar-2024
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 35.020 - Information technology (IT) in general
• ICS: 35.260 - Office machines
• Technical Committee: TC 108 - Safety of electronic equipment within the field of audio/video, information technology and communication technology
• Drafting Committee: MT 2 - TC 108/MT 2

Relations

• Amends: IEC 60950-1:2005 - Information technology equipment - Safety - Part 1: General requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60950-1 ®
Edition 2.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Information technology equipment – Safety –
Part 1: General requirements
Matériels de traitement de l'information – Sécurité –
Partie 1: Exigences générales
IEC 60950-1:2005/A2:2013
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IEC 60950-1 ®
Edition 2.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 2
AMENDEMENT 2
Information technology equipment – Safety –

Part 1: General requirements
Matériels de traitement de l'information – Sécurité –

Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 35.020; 35.260 ISBN 978-2-83220-741-3

– 2 – 60950-1 Amend.2 © IEC:2013
FOREWORD
This amendment has been prepared by IEC technical committee 108: Safety of electronic
equipment within the field of audio/video, information technology and communication
technology.
The text of this amendment is based on the following documents:
FDIS Report on voting
108/507/FDIS 108/510/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base 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• withdrawn,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.
____________
0.1 General principles of safety
Replace, in the existing second paragraph, the words "technologies and materials" by
"technologies, components and materials".
Add, between the existing second and third paragraphs, the following new note:
NOTE The need for additional detailed requirements to cope with a new situation should be brought promptly to
the attention of the appropriate committee.
1.1.1 Equipment covered by this standard
Replace the existing third paragraph by the following new paragraph:
This part of IEC 60950 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 60950;
– accessories intended to be used with equipment within the scope of this part of
IEC 60950.
Replace, in the existing NOTE 1, the words "components and subassemblies" by "components,
subassemblies and accessories".

60950-1 Amend.2 © IEC:2013 – 3 –
1.1.3 Exclusions
Replace in the existing first dash "and transformers;" by "and distribution transformers;"
1.2.1.1
RATED VOLTAGE
Replace the existing definition by the following new definition:
supply voltage from which the equipment is to be operated as declared by the manufacturer
1.5.1 General
Replace the existing text and notes of this subclause by the following new text:
Where safety is involved, components shall comply with the requirements of this standard or,
where specified in a requirements clause, with the safety aspects of the relevant IEC
component standards.
NOTE An IEC component standard is considered relevant only if the component in question clearly falls within its
scope.
Components and subassemblies that comply with IEC 62368-1 are acceptable as part of an
equipment covered by this standard without further evaluation other than to give consideration
to the appropriate use of the component or subassembly in the end-product.
1.5.2 Evaluation and testing of components
Replace the existing text and note of this subclause by the following new text:
Where use of an IEC component standard is permitted above, evaluation and testing of
components shall be conducted as follows:
– a component shall be checked for correct application and use in accordance with its
rating;
– a component that has been demonstrated to comply with a standard harmonized with the
relevant IEC component standard shall be subjected to the applicable tests of this
standard, as part of the equipment, with the exception of those tests that are part of the
relevant IEC component standard;
– a component that has not been demonstrated to comply with a relevant standard as above
shall be subjected to the applicable tests of this standard, as part of the equipment, and to
the applicable tests of the component standard, under the conditions occurring in the
equipment;
NOTE The applicable test for compliance with a component standard is, in general, conducted separately.
– where components are used in circuits not in accordance with their specified ratings, the
components shall be tested under the conditions occurring in the equipment. The number
of samples required for test is, in general, the same as required by an equivalent
standard.
Compliance is checked by inspection and by the relevant data or tests.
1.5.6 Capacitors bridging insulation
Replace the existing second dash of this subclause by the following new dash:
– Humidity: (93 ± 3) % relative humidity;

– 4 – 60950-1 Amend.2 © IEC:2013
Table 1C – Capacitor ratings according to IEC 60384-14
Replace, in the existing Table 1C modified by Amendment 1, the first six rows by the
following:
TYPE TEST TYPE TEST r.m.s.
RATED VOLTAGE of the
Capacitor subclass according to impulse voltage of voltage of the
capacitor
IEC 60384-14 the capacitor capacitor
V r.m.s.
kV peak kV r.m.s.
Y1 Up to and including 500 8 4
Over 150 up to and
Y2 5 1,5
including 300
Y4 Up to and including 150 2,5 0,9
a
X1 Up to and including 760 4 -
a
X2 Up to and including 760 2,5 -

Replace the existing Rule 2 of Table 1C modified by Amendment 1 by the following:
2 For a single capacitor bridging FUNCTIONAL INSULATION, BASIC INSULATION, SUPPLEMENTARY INSULATION or
REINFORCED INSULATION, the voltage rating of the single capacitor shall be at least equal to the RMS WORKING
VOLTAGE across the insulation being bridged, determined according to 2.10.2.2.
Replace the existing Rule 3 of Table 1C modified by Amendment 1 by the following:
3 For a single capacitor bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION,
– the TYPE TEST impulse test voltage of the single capacitor shall be not less than the peak value of the test
voltage (not the r.m.s. voltage) of Table 5B for BASIC INSULATION, or the peak value of the test voltage of
Table 5C for BASIC INSULATION, as applicable;
– the TYPE TEST r.m.s. voltages of the single capacitor shall be not less than the required r.m.s. test voltage
of Table 5B for BASIC INSULATION, or the equivalent r.m.s. test voltage (not the peak voltage) of Table 5C
for BASIC INSULATION, as applicable.
Replace the existing Rule 4 of Table 1C modified by Amendment 1 by the following:
4 For a single capacitor bridging DOUBLE INSULATION or REINFORCED INSULATION,
– the TYPE TEST impulse voltage of the single capacitor shall be not less than the peak value of the test
voltage (not the r.m.s. voltage) of Table 5B for REINFORCED INSULATION, or the peak value of the test
voltage of Table 5C for REINFORCED INSULATION, as applicable;
– the TYPE TEST r.m.s. voltage of the single capacitors shall be not less than the required r.m.s. test voltage
of Table 5B for REINFORCED INSULATION, or the equivalent r.m.s. test voltage (not the peak voltage) of
Table 5C for REINFORCED INSULATION, as applicable;
Replace the existing Rule 7 of Table 1C modified by Amendment 1 by the following:
7 If two or more capacitors are used in series, all of the following apply:
– under single fault conditions, the voltage on each of the remaining individual capacitors shall not exceed
the voltage rating of the relevant individual capacitor;
– for BASIC INSULATION or SUPPLEMENTARY INSULATION, the sum of the TYPE TEST peak impulse test voltages
of all capacitors shall be not less than the peak value of the test voltage (not the r.m.s. voltage) of Table
5B, or the peak value of the test voltage of Table 5C, as applicable;
– for BASIC INSULATION or SUPPLEMENTARY INSULATION, the sum of the TYPE TEST r.m.s. test voltages of all
capacitors shall be not less than the required r.m.s. test voltage of Table 5B, or the equivalent r.m.s. test
voltage (not the peak voltage) of Table 5C, as applicable;
– for REINFORCED INSULATION, the sum of the TYPE TEST peak impulse test voltages of all capacitors shall be
not less than the peak value of the test voltage (not the r.m.s. voltage) of Table 5B, or the peak value of
the test voltage of Table 5C, as applicable;
– for REINFORCED INSULATION, the sum of the TYPE TEST r.m.s. test voltages of all capacitors shall be not
less than the required r.m.s. test voltage of Table 5B, or the equivalent r.m.s. test voltage (not the peak
voltage) of Table 5C, as applicable;
– they shall comply with the other rules above.

60950-1 Amend.2 © IEC:2013 – 5 –
Table 1D – Informative examples of application of capacitors
Replace, in the existing Table 1D modified by Amendment 1, the value “1” by “-” in the
following rows as shown:
150 III 2,5 F X2 - 1
250 III 4,0 F X1 - 1
1.5.7.2 Resistors bridging double insulation or reinforced insulation between the a.c.
mains supply and other circuits
Replace, in the existing second dash, the value “93 % ± 3 %” by “(93 ± 3) %”.
1.5.9.2 Protection of VDRs
Replace the last existing sentence of this subclause by the following new sentence:
Compliance is checked by inspection and, if necessary to determine that the circuit is a
LIMITED CURRENT CIRCUIT, by measurement and test.
1.5.9.4 Bridging of basic insulation by a V
...