IEC 60950-1:2005/AMD1:2009

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

The contents of the corrigendum of August 2012 have been included in this copy.

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

Le contenu du corrigendum d'août 2012 a été pris en considération dans cet exemplaire.

General Information

• Status: Withdrawn
• Publication Date: 16-Dec-2009
• 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
• Corrected By: IEC 60950-1:2005/AMD1:2009/COR1:2012 - Corrigendum 1 - Amendment 1 - Information technology equipment - Safety - Part 1: General requirements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60950-1 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
AMENDMENT 1
Information technology equipment – Safety –
Part 1: General requirements
IEC 60950-1:2005/A1:2009(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,

please contact the address below or your local IEC member National Committee for further information.

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Switzerland
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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 60950-1 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
AMENDMENT 1
Information technology equipment – Safety –
Part 1: General requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
W
ICS 35.020; 35.260 ISBN 978-2-88910-345-4
– 2 – 60950-1 Amend. 1 © IEC:2009(E)

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
108/350/FDIS 108/357/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 maintenance result 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.
The contents of the corrigendum of August 2012 have been included in this copy.
____________
CONTENTS
Add the titles of the new annexes as follows:
Annex CC (normative), Evaluation of integrated circuit (IC) current limiters
Annex DD (normative), Requirements for the mounting means of rack-mounted equipment
Annex EE (normative), Household and home/office document/media shredders
Add the titles of the new figures as follows:

Figure 4G – Example for determining opening ‘X’ without a deflector
Figure 4H – Example for determining opening ‘X’ with a deflector
Figure EE.1 – Wedge probe (overall view)
Figure EE.2 – Wedge probe (tip details)

60950-1 Amend. 1 © IEC:2009(E) – 3 –

1.2 Definitions
Add after “RATING, PROTECTIVE CURRENT….1.2.13.17” in the list of “Definitions in alphabetical

order of nouns” the following new entry:

SHREDDER (DOCUMENT/MEDIA, HOUSEHOLD AND HOME/OFFICE) ….1.2.13.18

Add, after the existing definition 1.2.13.17, the following new definition:

1.2.13.18
(HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA) SHREDDER

equipment with a plug configuration associated with PLUGGABLE EQUIPMENT TYPE A, or battery
operated equipment, designed to shred paper or other forms of media as instructed by the
manufacturer
NOTE 1 Examples of other forms of media include but are not limited to digital video disks, compact disks, flash
memory, magnetic strip cards, or magnetic disks, or the like.
NOTE 2 HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA SHREDDERS are typically identified as either strip-cut type
or cross-cut type. A strip-cut HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA SHREDDER shreds the paper into long
strips using a motor-based shredding mechanism. A cross-cut DOCUMENT/MEDIA SHREDDER shreds paper two or
more ways into tiny particles, typically using a more powerful motor and more complex shredding mechanism.
NOTE 3 A document/media shredder is considered to be non-household or non-home/office type if the
document/media shredder is provided with a plug configuration associated with PLUGGABLE EQUIPMENT TYPE B, or is
PERMANENTLY CONNECTED EQUIPMENT.
Table 1C – Capacitor ratings according to IEC 60384-14
Replace the existing rule 3 of this table by the following:
3 For a single capacitor bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION, the peak
test voltage of the capacitor shall be at least equal to 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, and the r.m.s. test voltage 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.
Replace the existing rule 4 of this table by the following:
4 For a single capacitor bridging DOUBLE INSULATION or REINFORCED INSULATION, the peak test voltage of the
capacitor 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; and the r.m.s. test voltage 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.
Replace the existing rule 7 of this table 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 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 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 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 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.

– 4 – 60950-1 Amend. 1 © IEC:2009(E)

Table 1D – Informative examples of application of capacitors

Replace the existing Table 1D by the following new table:

AC MAINS
SUPPLY
MAINS
Number of capacitors
voltage
TRANSIENT
Overvoltage Bridged Capacitor
VOLTAGE
up to and Category insulation type
Using Table Using Table
including
kV
5B 5C
V r.m.s.
II 1,5 B or S Y2 1 1
II 1,5 D or R Y2 2 2
II 1,5 D or R Y1 1 1
II 1,5 F X2 1 1
III 2,5 F X2 1 1
150 III 2,5 B or S Y2 - 2
III 2,5 D or R Y1 - 1
IV 4,0 F X1 - 1
IV 4,0 B or S Y1 - 1
IV 4,0 B or S Y2 - 2
IV 4,0 D or R Y1 - 2
II 2,5 F X2 1 1
III 4,0 F X1 1 1
II 2,5 B or S Y2 1 2
II 2,5 D or R Y1 1 1
II 2,5 D or R Y2 2 3
III 4,0 B or S Y1 - 1
III 4,0 B or S Y2 - 2
III 4,0 D or R Y1 - 2
III 4,0 D or R Y2 - 4
IV 6,0 F X1 - 2
IV 6,0 B or S Y1 - 2
IV 6,0 D or R Y1 - 3
II 4,0 F X1 1 1
II 4,0 B or S Y1 1 1
II 4,0 D or R Y1 1 2
III 6,0 F X1 - 2
500 III 6,0 B or S Y1 - 2
III 6,0 D or R Y1 - 3
IV 8,0 F X1 - 2
IV 8,0 B or S Y1 - 2
IV 8,0 D or R Y1 - 3
The values in the table apply to FUNCTIONAL INSULATION (F), BASIC INSULATION (B), SUPPLEMENTARY
INSULATION (S), DOUBLE INSULATION (D) and REINFORCED INSULATION (R).
NOTE Table 5B is used for Overvoltage Categories I and II only.

60950-1 Amend. 1 © IEC:2009(E) – 5 –

1.5.7.1 Resistors bridging functional insulation, basic insulation or supplementary

insulation
Replace the existing note of this subclause by the following new note:

NOTE In Finland, Norway and Sweden resistors bridging BASIC INSULATION in CLASS I PLUGGABLE EQUIPMENT TYPE

A must comply with 1.5.7.1. In addition when a single resistor is used, the resistor must withstand the resistor test

in 1.5.7.2.
1.5.7.2 Resistors bridging double insulation or reinforced insulation between the a.c.

mains supply and other circuits
Replace the fifth paragraph of this subclause by the following new paragraph:
If an accessible conductive part or circuit is separated from another part by DOUBLE
INSULATION or REINFORCED INSULATION that is bridged by a resistor or group of resistors, the
accessible part or circuit shall comply with the requirements for a LIMITED CURRENT CIRCUIT in
2.4 between the accessible conductive part or circuit and earth. If a group of resistors is used,
the current measurement in 2.4.2 is made with each resistor short-circuited in turn, unless the
group passes the resistor test below. When measuring the LIMITED CURRENT CIRCUIT, the
ammeter is placed between the load side of the bridging components and any USER
accessible part, including earth.

1.5.9.4 Bridging of basic insulation by a VDR
After the existing note of this subclause, add the following new paragraph:
It is permitted to use a gas discharge tube (GDT) in series with a VDR that bridges BASIC
INSULATION in accordance with the conditions in this subclause if the GDT complies with the
requirements for FUNCTIONAL INSULATION.

– 6 – 60950-1 Amend. 1 © IEC:2009(E)

1.7 Markings and instructions
Replace the existing note of this subclause by the following new note:

NOTE Additional requirements for markings and instructions are contained in the following subclauses:

2.1.1.2 Battery compartments 4.3.3 Adjustable controls

2.1.1.8 Energy hazards 4.3.5 Plugs and sockets

2.3.2.3 Protection by earthing 4.3.13.4 UV radiation

2.6.1 Unearthed parts 4.3.13.5 Lasers

2.6.2 FUNCTIONAL EARTHING 4.4.2 Hazardous moving parts
2.6.3.4 c) Bonding conductors 4.4.5.2 Fan protection for USERS
2.6.5.1 Bonding conductors 4.4.5.3 Fan protection for service persons
2.7.1 External protective devices 4.5.4 Table 4C Marking of hot parts
2.7.6 Neutral fusing 4.5.4 Touch temperatures
2.10.3.2 Overvoltage Categories 4.6.2 Equipment on non-combustible floors
3.2.1.2 DC MAINS SUPPLY 4.6.3 Removable doors and covers
3.3.7 Grouping of wiring terminals 5.1.7.1 TOUCH CURRENT exceeding 3,5 mA
3.4.3 Disconnect devices  5.1.8.2 Summation of TOUCH CURRENTS
3.4.6 Two-pole disconnect devices  6.1.1 and 6.1.2.2 Earthing for a TELECOMMUNICATION NETWORK
3.4.7 Four-pole disconnect devices 7.2 and 7.4.1 Earthing for a CABLE DISTRIBUTION SYSTEM
3.4.9 Plugs as disconnect devices G.2.1 Equipment in Overvoltage Categories III and IV
3.4.10 Interconnected equipment DD.2 Maximum shelf load
3.4.11 Multiple power sources EE.2 Shredder warning
4.1 Equipment stability EE.4 Shredder power disconnection
4.2.5 Impact test
1.7.1 Power rating
Replace the existing title and text of this subclause by the following new title and text
(including the new subclauses 1.7.1.1 and 1.7.1.2):
1.7.1 Power rating and identification markings
1.7.1.1 Power rating markings
Equipment shall be provided with a power rating marking, the purpose of which is to specify a
supply of correct voltage and frequency, and of adequate current-carrying capacity.
If the equipment is not provided with a means for direct connection to a MAINS SUPPLY, it need
not be marked with any electrical rating, such as its RATED VOLTAGE, RATED CURRENT or RATED
FREQUENCY. If the equipment, or a system, has multiple MAINS SUPPLY connections, each
individual MAINS SUPPLY electrical rating must be marked, but the overall equipment or system
electrical rating need not be marked.

60950-1 Amend. 1 © IEC:2009(E) – 7 –

For equipment intended to be installed by an OPERATOR, the power rating marking, if required,

shall be readily visible in any OPERATOR ACCESS AREA. If a manual voltage selector is not

OPERATOR-accessible, the power rating marking shall indicate the RATED VOLTAGE for which

the equipment is set during manufacture; a temporary marker is permitted for this purpose.

The power rating marking is permitted on any outer surface of the equipment, except the

bottom of equipment having a mass exceeding 18 kg.

For STATIONARY EQUIPMENT, the power rating marking shall be visible after the equipment has

been installed as in normal use.

For equipment intended to be installed by a SERVICE PERSON, and if the power rating marking
...

IEC 60950-1 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Information technology equipment – Safety –
Part 1: General requirements
Matériels de traitement de l'information – Sécurité –
Partie 1: Exigences générales
IEC 60950-1:2005/A1:2009
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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International Standards for all electrical, electronic and related technologies.

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IEC 60950-1 ®
Edition 2.0 2009-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
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 W
ICS 35.020; 35.260 ISBN 978-2-88912-075-8

– 2 – 60950-1 Amend. 1  IEC:2009
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.
This bilingual version (2012-04) corresponds to the monolingual English version, published in
2009-12.
The text of this amendment is based on the following documents:
FDIS Report on voting
108/350/FDIS 108/357/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 French version of this amendment has not been voted upon.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result 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.
The contents of the corrigendum of August 2012 have been included in this copy.
____________
CONTENTS
Add the titles of the new annexes as follows:
Annex CC (normative), Evaluation of integrated circuit (IC) current limiters
Annex DD (normative), Requirements for the mounting means of rack-mounted equipment
Annex EE (normative), Household and home/office document/media shredders
Add the titles of the new figures as follows:
Figure 4G – Example for determining opening ‘X’ without a deflector
Figure 4H – Example for determining opening ‘X’ with a deflector
Figure EE.1 – Wedge probe (overall view)
Figure EE.2 – Wedge probe (tip details)

60950-1 Amend. 1  IEC:2009 – 3 –
1.2 Definitions
Add after “RATING, PROTECTIVE CURRENT….1.2.13.17” in the list of “Definitions in alphabetical
order of nouns” the following new entry:
SHREDDER (DOCUMENT/MEDIA, HOUSEHOLD AND HOME/OFFICE) ….1.2.13.18
Add, after the existing definition 1.2.13.17, the following new definition:
1.2.13.18
(HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA) SHREDDER
equipment with a plug configuration associated with PLUGGABLE EQUIPMENT TYPE A, or battery
operated equipment, designed to shred paper or other forms of media as instructed by the
manufacturer
NOTE 1 Examples of other forms of media include but are not limited to digital video disks, compact disks, flash
memory, magnetic strip cards, or magnetic disks, or the like.
NOTE 2 HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA SHREDDERS are typically identified as either strip-cut type
or cross-cut type. A strip-cut HOUSEHOLD AND HOME/OFFICE DOCUMENT/MEDIA SHREDDER shreds the paper into long
strips using a motor-based shredding mechanism. A cross-cut DOCUMENT/MEDIA SHREDDER shreds paper two or
more ways into tiny particles, typically using a more powerful motor and more complex shredding mechanism.
NOTE 3 A document/media shredder is considered to be non-household or non-home/office type if the
document/media shredder is provided with a plug configuration associated with PLUGGABLE EQUIPMENT TYPE B, or is
PERMANENTLY CONNECTED EQUIPMENT.
Table 1C – Capacitor ratings according to IEC 60384-14
Replace the existing rule 3 of this table by the following:
3 For a single capacitor bridging FUNCTIONAL INSULATION, BASIC INSULATION or SUPPLEMENTARY INSULATION, the peak
test voltage of the capacitor shall be at least equal to 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, and the r.m.s. test voltage 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.
Replace the existing rule 4 of this table by the following:
4 For a single capacitor bridging DOUBLE INSULATION or REINFORCED INSULATION, the peak test voltage of the
capacitor 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; and the r.m.s. test voltage 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.
Replace the existing rule 7 of this table 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 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 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 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 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.

– 4 – 60950-1 Amend. 1  IEC:2009
Table 1D – Informative examples of application of capacitors
Replace the existing Table 1D by the following new table:
AC MAINS
SUPPLY
MAINS
Number of capacitors
voltage
TRANSIENT
Overvoltage Bridged Capacitor
VOLTAGE
up to and Category insulation type
Using Table Using Table
including
kV
5B 5C
V r.m.s.
II 1,5 B or S Y2 1 1
II 1,5 D or R Y2 2 2
II 1,5 D or R Y1 1 1
II 1,5 F X2 1 1
III 2,5 F X2 1 1
150 III 2,5 B or S Y2 - 2
III 2,5 D or R Y1 - 1
IV 4,0 F X1 - 1
IV 4,0 B or S Y1 - 1
IV 4,0 B or S Y2 - 2
IV 4,0 D or R Y1 - 2
II 2,5 F X2 1 1
250 III 4,0 F X1 1 1
II 2,5 B or S Y2 1 2
II 2,5 D or R Y1 1 1
II 2,5 D or R Y2 2 3
III 4,0 B or S Y1 - 1
III 4,0 B or S Y2 - 2
III 4,0 D or R Y1 - 2
III 4,0 D or R Y2 - 4
IV 6,0 F X1 - 2
IV 6,0 B or S Y1 - 2
IV 6,0 D or R Y1 - 3
II 4,0 F X1 1 1
II 4,0 B or S Y1 1 1
II 4,0 D or R Y1 1 2
III 6,0 F X1 - 2
500 III 6,0 B or S Y1 - 2
III 6,0 D or R Y1 - 3
IV 8,0 F X1 - 2
IV 8,0 B or S Y1 - 2
IV 8,0 D or R Y1 - 3
The values in the table apply to FUNCTIONAL INSULATION (F), BASIC INSULATION (B), SUPPLEMENTARY
INSULATION (S), DOUBLE INSULATION (D) and REINFORCED INSULATION (R).
NOTE Table 5B is used for Overvoltage Categories I and II only.

60950-1 Amend. 1  IEC:2009 – 5 –
1.5.7.1 Resistors bridging functional insulation, basic insulation or supplementary
insulation
Replace the existing note of this subclause by the following new note:
NOTE In Finland, Norway and Sweden resistors bridging BASIC INSULATION in CLASS I PLUGGABLE EQUIPMENT TYPE
A must comply with 1.5.7.1. In addition when a single resistor is used, the resistor must withstand the resistor test
in 1.5.7.2.
1.5.7.2 Resistors bridging double insulation or reinforced insulation between the a.c.
mains supply and other circuits
Replace the fifth paragraph of this subclause by the following new paragraph:
If an accessible conductive part or circuit is separated from another part by DOUBLE
INSULATION or REINFORCED INSULATION that is bridged by a resistor or group of resistors, the
accessible part or circuit shall comply with the requirements for a LIMITED CURRENT CIRCUIT in
2.4 between the accessible conductive part or circuit and earth. If a group of resistors is used,
the current measurement in 2.4.2 is made with each resistor short-circuited in turn, unless the
group passes the resistor test below. When measuring the LIMITED CURRENT CIRCUIT, the
ammeter is placed between the load side of the bridging components and any USER
accessible part, including earth.

1.5.9.4 Bridging of basic insulation by a VDR
After the existing note of this subclause, add the following new paragraph:
It is permitted to use a gas discharge tube (GDT) in series with a VDR that bridges BASIC
INSULATION in accordance with the conditions in this subclause if the GDT complies with the
requirements for FUNCTIONAL INSULATION.

– 6 – 60950-1 Amend. 1  IEC:2009
1.7 Markings and instructions
Replace the existing note of this subclause by the following new note:
NOTE Additional requirements for markings and instructions are contained in the following subclauses:
2.1.1.2 Battery compartments 4.3.3 Adjustable controls
2.1.1.8 Energy hazards 4.3.5 Plugs and sockets
2.3.2.3 Protection by earthing 4.3.13.4 UV radiation
2.6.1 Unearthed parts 4.3.13.5 Lasers
2.6.2 FUNCTIONAL EARTHING
...