IEC 60950-1:2005/AMD2:2013

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• withdrawn,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 VDR
Replace the first existing paragraph of this subclause by the following new paragraph:
It is permitted to bridge BASIC INSULATION by a VDR complying with the requirements of
Annex Q, with or without a GDT in series, provided that one side of the circuit is earthed in
accordance with 2.6.1 a).
Replace the last existing paragraph of this subclause, added by Amendment 1, and the
compliance statement by the following new text:
For all other equipment, it is permitted to bridge BASIC INSULATION by a VDR in series with a
GDT provided that:
– the VDR complies with the requirements of Annex Q; and
– the GDT complies with:
• the electric strength test for BASIC INSULATION; and
• the external CLEARANCE and CREEPAGE DISTANCE requirements for BASIC INSULATION.
Compliance is checked by inspection and, if necessary, by measurement and test.
1.7 Markings and instructions
Delete the existing reference to “2.1.1.8 Energy hazards”.
1.7.1.1 Power rating markings
Replace the existing second paragraph, added by Amendment 1, by the following two new
paragraphs:
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, unless they are the same, but the overall equipment

– 6 – 60950-1 Amend.2 © IEC:2013
or system electrical rating need not be marked. If the multiple MAINS SUPPLY are identical, it is
permitted to mark them, for example, as “MAINS SUPPLY electrical rating x N” where N is the
number of identical MAINS SUPPLY connections.
1.7.1.2 Identification markings
Add, after the existing subclause added by Amendment 1, the following new subclause:
1.7.1.3 Use of graphical symbols
Graphical symbols placed on the equipment, whether required by this standard or not, shall
be in accordance with IEC 60417 or ISO 3864-2 or ISO 7000, if available. In the absence of
suitable symbols, the manufacturer may design specific graphical symbols.
Symbols placed on the equipment shall be explained in the user manual.
2.2.3 Voltages under fault conditions
Replace, in the existing first paragraph of this subclause, the existing words "Figure 2E" by
"Figure 2E.1 and Figure 2E.2" (two instances).
Replace in the existing first paragraph of this subclause the value “120 V d.c” by “120 V ”.
peak
Replace the existing third paragraph starting with “Only one pulse ." by the following new
text:
A limit of 120 V applies if the pulse goes above V only once during time t , for example
peak 1 1
see Figure 2E.1.
A limit of 71 V applies if the pulse goes above V more than once during time t , for
peak 1 1
example see Figure 2E.2.
Figure 2E – Voltages in SELV circuits under single fault conditions
Replace the existing Figure 2E by the following new Figures 2E.1 and 2E.2:

t t
1 2
V 120 V
2 peak
V
0 V
IEC  710/13
Figure 2E.1 – Voltages in SELV circuits under single
fault conditions for a single pulse above V1

60950-1 Amend.2 © IEC:2013 – 7 –

t t
1 2
V 71 V
2 peak
V
0 V
IEC  711/13
Figure 2E.2 – Voltages in SELV circuits under single
fault conditions for multiple pulses above V1
Table 2B – Limits for power sources without an overcurrent protective device
Replace the existing footnote d of this table by the following new footnote:
d
Measurement of I and S are made 5 s after application of the load if protection is by an electronic circuit and
sc
60 s for a positive temperature coefficient device or in other cases.
2.6.2 Functional earthing
Delete the existing last dashed item of this subclause, including the bulleted items of this
dash.
Add, before the existing last sentence of this subclause, the following new text:
For equipment having a power supply cord where a conductor with green-and-yellow
insulation is used only to provide a FUNCTIONAL EARTHING connection:
– the equipment shall not be marked with the symbol , IEC 60417-5172 (2003-02); and
– the equipment may be marked with:
• the symbol , IEC 60417-5018 (2011-07); or
• the symbol , IEC 60417-6092 (2011-10).
These symbols shall not be used for CLASS I EQUIPMENT.
There are no requirements other than those in 3.1.9 regarding the termination of this
FUNCTIONAL EARTHING conductor at the equipment end.

Table 2D – Minimum size of protective bonding conductors
Replace the value “16” in the first column, first row by “20”.
2.7.1 Basic requirements
Replace in the existing note the word “CENELEC” by “CENELEC and in China”.

– 8 – 60950-1 Amend.2 © IEC:2013
2.9.2 Humidity conditioning
Replace in the existing first paragraph, modified in Amendment 1, the value “2 K” by “± 2 °C”.
Replace the existing second paragraph by the following two new paragraphs:
For equipment designated for use in tropical conditions, the time duration shall be 120 h at a
temperature of (40 ± 2) °C and a relative humidity of (93 ± 3) %.
With the concurrence of the manufacturer, it is permitted to increase the time durations.
Table 2H – Examples of application of insulation
Replace the existing row for BASIC, TNV-2 CIRCUIT of this table by the following new row:
d e
TNV-2 CIRCUIT – unearthed TNV-1 CIRCUIT B12
d f
– earthed TNV-1 CIRCUIT B13
f
– TNV-3 CIRCUIT B14
Replace the existing row for SUPPLEMENTARY, TNV CIRCUIT of this table by the following new
row:
TNV CIRCUIT – basic-insulated conductive part S2
– ELV CIRCUIT S2
Figure 2H – Examples of application of insulation
Replace the existing figure, including the note, by the following new note and figure:

60950-1 Amend.2 © IEC:2013 – 9 –

Similar circuit or
conductive part
PRIMARY CIRCUIT
F6
R B
B1
Unearthed
HAZARDOUS VOLTAGE
SECONDARY CIRCUIT B4
S/R B
B1
Earthed
HAZARDOUS VOLTAGE
F5
B
SECONDARY CIRCUIT
R
B3 B6 B6
ELV CIRCUIT or
basic-insulated
F4
S
conductive part
F
c)
b)
R1 R3 S/R1 S1
Unearthed SELV CIRCUIT
or double-insulated
conductive part
F2
B6 B F
B2 B5 B5 F3 F1
Earthed SELV CIRCUIT
F11
B F
c)
f)
f)
R2 R4 S/R2 S2
B7 F12
Unearthed TNV-1 CIRCUIT
F7
B
c)
f) f)
R2 R4 S/R2 S2
F10 F13
Earthed TNV-1 CIRCUIT
F7
B
c)
d) f)  d) d) d) e)
R2 R4 S/R2 S2
B8 B10 B12
B13
TNV-2 CIRCUIT
F8
B
d) f)  d) e) d) e)
c)
R2 R4 S/R2 S2 B13 B14 B9 B11 B12
TNV-3 CIRCUIT
F9
F: FUNCTIONAL INSULATION B: BASIC INSULATION
S: SUPPLEMENTARY INSULATION S/R: see Footnote c in Table 2H
R: REINFORCED INSULATION
IEC  712/13
NOTE The references b), c), d), e) and f) refer to the corresponding footnotes in Table 2H.
2.10.3.1 General
Add, after the existing Note 1, the following new note and renumber the subsequent notes
accordingly:
NOTE 2 China has special requirements in choosing multiplication factors at altitudes above 2 000 m.
Table 2L – Additional clearances in primary circuits
Replace the existing table, modified by Amendment 1, by the following new table:

– 10 – 60950-1 Amend.2 © IEC:2013
CLEARANCES in mm
MAINS TRANSIENT VOLTAGE
c c
1 500 V 2 500 V
a a
Pollution Pollution FUNCTIONAL REINFORCED Pollution degrees FUNCTIONAL REINFORCED
b
Degrees Degree 3 BASIC or INSULATION 1, 2 and 3 BASIC or INSULATION
b
1 and 2  SUPPLEMENTARY SUPPLEMENTARY

INSULATION INSULATION
PEAK WORKING PEAK WORKING
VOLTAGE VOLTAGE
up to and up to and
including including
V V
210 (210) 210 (210) 0,0 0,0 420 (420) 0,0 0,0
298 (288) 294 (293) 0,1 0,2 493  (497) 0,1 0,2
386 (366) 379 (376) 0,2 0,4 567  (575) 0,2 0,4
474 (444) 463 (459) 0,3 0,6 640  (652) 0,3 0,6
562 (522) 547 (541) 0,4 0,8 713  (729)
0,4 0,8
650 (600) 632 (624) 0,5 1,0 787  (807) 0,5 1,0
738 (678) 715 (707) 0,6 1,2 860  (884) 0,6 1,2
826 (756) 800 (790) 0,7 1,4 933  (961) 0,7 1,4
914 (839) 885 (873) 0,8 1,6 1 006 (1 039) 0,8 1,6
1 002 (912)  970 (956) 0,9
1,8 1 080 (1 116) 0,9 1,8
1 090 (990)
1 055 (1 039) 1,0 2,0 1 153 (1 193) 1,0 2,0
1 178 (1 068) 1 140 (1 122) 1,1 2,2 1 226 (1 271) 1,1 2,2
1 266 (1 146) 1 225 (1 205) 1,2 2,4 1 300 (1 348) 1,2 2,4
1 354 (1 224) 1 310 (1 288) 1,3 2,6 1 374 (1 425) 1,3 2,6
The additional CLEARANCES in the table apply if required by 2.10.3.3 b).
The values in parentheses shall be used:
– if the values in parentheses in Table 2K are used; and
– for FUNCTIONAL INSULATION if required by 5.3.4 a).
For voltage values above the PEAK WORKING VOLTAGE values given in the table, linear extrapolation is permitted.
For voltage values within the PEAK WORKING voltage values given in the table, linear interpolation is permitted
between the nearest two points, the calculated minimum additional CLEARANCE being rounded up to the next higher
0,1 mm increment.
a
There is no minimum CLEARANCE for FUNCTIONAL INSULATION unless it is required by 5.3.4 a). See 2.10.1.3.
b
It is not required to pass the tests of 2.10.10 for Pollution Degree 1.
c
The relationship between MAINS TRANSIENT VOLTAGE and AC MAINS SUPPLY voltage is given in Table 2J.

2.10.10 Test for Pollution Degree 1 environment and for insulating compound
Replace the existing last paragraph of this subclause by the following new text:
For other than printed boards, compliance is checked by inspection of the cross-sectional
area, and there shall be no visible voids, gaps or cracks in the insulating material.
In the case of insulation between conductors on the same inner surface of printed boards and
the insulation between conductors on different surfaces of multilayer printed boards,
compliance is checked by external visual inspection. There shall be no delamination which
affects the pollution degree.
60950-1 Amend.2 © IEC:2013 – 11 –
2.10.11 Tests for semiconductor devices and for cemented joints
Replace the existing last paragraph of this subclause by the following new text:
Compliance is checked by inspection and measurement.
Except for cemented joints on the same inner surface of a printed board, compliance is
checked by inspection of the cross-sectional area, and there shall be no visible voids, gaps or
cracks in the insulating material.
In the case of insulation between conductors on the same inner surface of printed boards and
the insulation between conductors on different surfaces of multilayer boards, compliance is
checked by measurement and external visual inspection. There shall be no delamination.
3.2.5.1 AC power supply cords
Replace the entire existing text of this subclause, except for Table 3B, by the following new
text:
A MAINS SUPPLY cord shall be of the sheathed type and comply with the following as
appropriate:
– if rubber sheathed, be of synthetic rubber and not lighter than ordinary tough rubber-
sheathed flexible cord according to IEC 60245-1 (designation 60245 IEC 53);
– if PVC sheathed:
• for equipment provided with a NON-DETACHABLE POWER SUPPLY CORD and having a mass
not exceeding 3 kg, be not lighter than light PVC sheathed flexible cord according to
IEC 60227-1:2007 (designation 60227 IEC 52);
• for equipment provided with a NON-DETACHABLE POWER SUPPLY CORD and having a mass
exceeding 3 kg, be not lighter than ordinary PVC sheathed flexible cord according to
IEC 60227-1:2007 (designation 60227 IEC 53);
NOTE 1 There is no limit on the mass of the equipment if the equipment is intended for use with a
DETACHABLE POWER SUPPLY CORD.
• for equipment provided with a DETACHABLE POWER SUPPLY CORD, be not lighter than
light PVC sheathed flexible cord according to IEC 60227-1:2007 (designation 60227
IEC 52);
• for screened cords of MOVEABLE EQUIPMENT, the flexing test of 3.1 of
IEC 60227-2:1997;
NOTE 2 Although screened cords are not covered in the scope of IEC 60227-2, the relevant flexing tests
of IEC 60227-2 are used.
– other types of cords may be used if they have similar or better electro-mechanical and fire
safety properties as above.
NOTE 3 Where national or regional standards exist, they can be used to show compliance with the above
paragraph.
For equipment required to have protective earthing, a PROTECTIVE EARTHING CONDUCTOR shall
be included in the MAINS SUPPLY cord.
A MAINS SUPPLY cord shall have conductors with a cross-sectional area not less than those
specified in Table 3B.
Compliance is checked by inspection. For screened cords, damage to the screen is
acceptable provided that:
– during the flexing test the screen does not make contact with any conductor, and

– 12 – 60950-1 Amend.2 © IEC:2013
– after the flexing test, the sample withstands the appropriate electric strength test between
the screen and all other conductors.
Table 3E – Sizes of terminals for mains supply conductors and protective earthing
conductors
Replace the existing table by the following new table:
Minimum nominal thread Area of cross section
diameter mm
RATED CURRENT
Conductor size
mm
A 2
mm
b b
up to and including
Pillar type or Screw type  Pillar type or Screw type
stud type stud type
10 1 3,0 3,5 7 9,6
16 1,5 3,5 4,0 9,6 12,6
25 2,5 4,0 5,0 12,6 19,6
32 4 4,0 5,0 12,6 19,6
40 6 5,0 5,0 19,6 19,6
c
63 10 6,0 6,0 28 28
c
80 16 7,9 7,9 49 49
a
This table is also used for the sizes of terminals for PROTECTIVE BONDING CONDUCTORS if specified in 2.6.4.2.
b
"Screw type" refers to a terminal that clamps the conductor under the head of a screw, with or without a

washer.
c
As an alternative to the requirements of this table, the protective earthing conductor may be attached to
special connectors, or suitable clamping means (for example, an upturned spade or closed loop pressure
type; clamping unit type; saddle clamping unit type; mantle clamping unit type; etc.) that is secured by a
screw and nut mechanism to the metal chassis of the equipment. The sum of the cross-sectional areas of the
screw and the nut shall not be less than three times the cross-sectional area of the conductor size in
Table 2D or Table 3B as applicable. The terminals shall comply with IEC 60998-1 and IEC 60999-1 or

IEC 60999-2.
3.4.11 Multiple power sources
Add, after the existing first paragraph of this subclause, the following new paragraph:
If the disconnect device is not in the equipment, the marking shall be on the equipment and
located close to the MAINS input terminals.
4.1 Stability
Add, at the end of the existing text of the first dashed item, the following new paragraph and
new note:
Alternatively, the unit is placed in its intended position of use on a plane, inclined at an
angle of 10° to the horizontal, and then rotated slowly through an angle of 360° about
its normal vertical axis.
NOTE It could be the plane being turned around or the plane could be stationary and the equipment is
rotated.
4.3.8 Batteries
Delete the first existing paragraph of this subclause.
Add, after the existing Note 3, the following new paragraphs:
Portable secondary sealed cells and batteries (other than button) containing alkaline or other
non-acid electrolyte shall comply with IEC 62133.

60950-1 Amend.2 © IEC:2013 – 13 –
Equipment containing batteries shall be designed to reduce the risk of fire, explosion and
chemical leaks under normal conditions and after a single fault in the equipment (see 1.4.14).
For USER-replaceable batteries, the design shall reduce the likelihood of reverse polarity
installation if this would create a hazard.
Replace, in the existing list after Note 6, the existing first dashed item, including the bullets,
by the following new dashed item:
– Overcharging of a rechargeable battery. The battery is charged while briefly
subjected to the simulation of any SINGLE FAULT CONDITION that is likely to occur in the
charging circuit and that results in overcharging of the battery. To minimize testing
time, the failure is chosen that causes the worst-case overcharging condition. The
battery is then charged for a single period of 7h with the simulated failure in place.
4.3.13.5.2 Light emitting diodes (LEDs)
Add, after the existing Note 2 added by Amendment 1, the following new note:
NOTE 3 If optical radiation is broadband visible and lR-A radiation and the luminance of the source does not
4 2
exceed 10 cd/m , it is expected that the radiation does not exceed the exposure limits given in 4.3 of
IEC 62471:2006 (see 4.1 of IEC 62471:2006).
4.4.5.2 Protection for users
Replace in the existing third paragraph, added by Amendment 1, the words “similar symbol,
combined” with “similar symbol combined”, thereby deleting the comma.
4.7.3.4 Materials for components and other parts inside fire enclosures
Add, at the end of the existing first paragraph, the following new sentence:
Requirements for voltage dependent resistors (VDR’s) are in Annex Q.
Table 5C – Test voltages for electric strength tests based on required withstand
voltages
Replace the existing table by the following new table:

– 14 – 60950-1 Amend.2 © IEC:2013
Table 5C – Test voltages for electric strength tests
based on required withstand voltages
REQUIRED WITHSTAND Test voltage for BASIC Test voltage for
VOLTAGE INSULATION or SUPPLEMENTARY REINFORCED INSULATION
up to and including kV peak INSULATION
kV peak a.c. or d.c.
0,33 0,33 0,5
0,5 0,5 0,8
0,8 0,8 1,5
1,5 1,5 2,5
2,5 2,5 4
4,0 4 6
6,0 6 8
8,0 8 12
12 12 18
a
U U 1,5 x U
Linear interpolation is permitted between the nearest two points.
If FUNCTIONAL INSULATION is tested (as required by 5.3.4 b), the test voltage for a WORKING VOLTAGE up to and
including 42,4 V peak or 60 V d.c. shall not exceed 707 V peak or d.c. For a higher WORKING VOLTAGE, the test
voltage given in Table 5B or Table 5C is used.
a
U is any REQUIRED WITHSTAND VOLTAGE higher than 12,0 kV.

6.2.2 Electric strength test procedure
Replace the existing note by the following new note:
NOTE In Australia, a value of 3,0 kV is used for 6.2.1 a) equipment and 1,5 kV for 6.2.1 b) and 6.2.1 c)
equipment. These values have been determined considering the low frequency induced voltages from the power
supply distribution system.
7.4.1 General
Add, at the end of the second dashed list starting with “The above requirements …”, the
following new dashed paragraph:
– to equipment where:
• the circuit under consideration is a TNV-1 CIRCUIT; and
• the common or earthed side of the circuit is connected to the screen of the coaxial
cable and to all accessible parts and circuits (SELV, accessible metal parts and LIMITED
CURRENT CIRCUITS, if any); and
• the screen of the coaxial cable is intended to be connected to earth in the building
installation.
7.4.3 Impulse test
Add, at the end of the existing text, the following new paragraph:
The 4 kV test is not needed for an electrical separation that complies with the 3 000 V r.m.s.
or 4 242 V peak a.c. or d.c. test in accordance with 5.2.2.
B.7.2 Test procedure
Replace the existing text of this subclause by the following new text:

60950-1 Amend.2 © IEC:2013 – 15 –
The motor is operated at the voltage used in its application and with its rotor locked for 7 h or
until steady state conditions are established, whichever is the longer. However, if the motor
winding opens, or the motor otherwise becomes permanently de-energized, the test is
discontinued.
Temperatures shall not exceed the values specified in Table B.1.
B.7.3 Alternative test procedure
Replace the existing second paragraph of this subclause by the following new paragraph:
The motor is then operated at the voltage used in its application and with its rotor locked for
7 h or until steady state conditions are established, whichever is the longer. However, if the
motor winding opens, or the motor otherwise becomes permanently de-energized, the test is
discontinued.
Figure D.1 – Measuring instrument
Replace, in the existing key, “15 Hz up to 1 MHz” by “20 Hz up to 1 MHz”.
Figure F.8 – Narrow recess
Replace the existing figure by the following new figure:

IEC  713/13
a
IEC  714/13
b
Gap between head of screw and wall of recess too narrow to be taken into account.
Measurement of creepage distance is from screw to wall where the distance is equal to X mm.
Figure F.8 – Narrow recess
CLEARANCE        CREEPAGE DISTANCE

– 16 – 60950-1 Amend.2 © IEC:2013
Figure F.9 – Wide recess
Replace the existing figure by the following new figure:

≥X mm
IEC  715/13
a
≥X mm
IEC  716/13
b
Gap between head of screw and wall of recess wide enough to be taken into account.
Figure F.9 – Wide recess
CLEARANCE        CREEPAGE DISTANCE

Annex P – Normative references
Replace the existing first paragraph of this annex by the following new text:
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies taking into account any
transition period, effective date or date of withdrawal established for the existing document.
These documents are referenced, in whole, in part or as alternative requirements to the
requirements contained in this standard. Their use is specified, where necessary, for the
application of the requirements of this standard.
NOTE The list below is a summary of all standards that are referred to within this standard. Appearance of a
standard in the list on itself does not mean that the standard or parts of it are applicable. Only those parts that are
specifically referenced in this standard are applicable.
Delete the existing normative reference to IEC 60227 (all parts).
Replace the existing reference to IEC 60851-3:1996, its amendment and its footnote by the
following new normative reference:
IEC 60851-3:2009, Winding wires – Test methods – Part 3: Mechanical properties

60950-1 Amend.2 © IEC:2013 – 17 –
Replace the existing reference to IEC 60851-5:1996, its two amendments and its footnote by
the following new normative reference:
IEC 60851-5:2008, Winding wires – Test methods – Part 5: Electrical properties
Add, to the existing list, the following new normative references:
IEC 60127-1, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
IEC 60227-1:2007, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 1: General requirements
IEC 60227-2:1997, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 2: Test methods
Amendment 1: 2003
IEC 60998-1, Connecting devices for low-voltage circuits for household and similar purposes
– Part 1: General requirements
IEC 60999-1, Connecting devices – Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units – Part 1: General requirements and particular
2 2
requirements for clamping units for conductors from 0,2 mm up to 35 mm (included)
IEC 60999-2, Connecting devices – Electrical copper conductors – Safety requirements for
screw-type and screwless-type clamping units – Part 2: Particular requirements for clamping
2 2
units for conductors above 35 mm up to 300 mm (included)
IEC 62133:2012, Secondary cells and batteries containing alkaline or other non-acid
electrolytes – Safety requirements for portable sealed secondary cells, and for batteries made
from them, for use in portable applications
IEC 62368-1, Audio/video, information and communication technology equipment – Part 1:
Safety requirements
Annex Q – Voltage dependent resistors (VDRs)
Replace the existing text of this annex by the following new text:
A VDR shall comply with IEC 61051-2, whether a FIRE ENCLOSURE is provided or not, taking
into account all of the following:
– Preferred climatic categories (2.1.1 of IEC 61051-2:1991):
• lower category temperature: – 10 °C
• upper category temperature: + 85 °C
• duration of damp heat, steady state test: 21 days.
– Maximum continuous voltage
• at least 1,25 times the rated voltage of the equipment or
• at least 1,25 times the upper voltage of the rated voltage range.
NOTE The maximum continuous voltages are not limited to values specified in 2.1.2 of IEC 61051-2:1991, other
voltages are permitted.
– Combination pulse (Table I group 1 of IEC 61051-2:1991 including Amendment 1:2009).

– 18 – 60950-1 Amend.2 © IEC:2013
For the test, a combination pulse is selected from 2.3.6 in IEC 61051-2:1991,
Amendment 1: 2009. The test consists of 10 positive pulses or 10 negative pulses, each
having a shape of 1,2/50 µs for voltage and 8/20 µs for current.
For the selection, AC MAINS SUPPLY voltage and overvoltage category, see Table G.1.
MAINS SUPPLY under 300 V is considered to be 300 V.
For overvoltage category IV of Table G.1, a combination pulse 6 kV/3 kA is used except
for equipment intended for connection to a system supply of 600 V, for which a
combination pulse of 8 kV/4 kA is used. As an alternative to the 6 kV/3 kA test, the
combination pulse test of IEC 61051-2:1991, Amendment 1:2009 (2.3.6, Table I group 1
and Annex A), including consideration of the nominal MAINS SUPPLY voltage and
overvoltage category, is acceptable.
In addition to the performance requirements of Table I group 1 of IEC 61051-2: 1991 and
its Amendment 1: 2009, the VDR voltage at the manufacturer's specified current after the
test shall not have changed by more than 10 % when compared to the value before the
test.
The body of the VDR shall comply with the needle flame according to IEC 60695-11-5, with
the following test severities:
– duration of application of the test flame: 10 s;
– after flame time: 5 s.
If the body of the VDR complies with V-1 CLASS MATERIAL, the needle flame test does not need
to be performed.
Annex U – Insulated winding wires for use without interleaved insulation
Replace the entire existing annex by the following new text:
U.1 General
This annex specifies winding wires whose insulation may be used to provide BASIC INSULATION,
SUPPLEMENTARY INSULATION, DOUBLE INSULATION or REINFORCED INSULATION in wound
components without interleaved insulation.
This annex applies to solid round winding wires having diameters between 0,01 mm and
5,0 mm, stranded winding wires with equivalent cross-sectional areas and solid square and
solid rectangular (flatwise bending) winding wires with cross-sectional areas of 0,000 079
2 2
mm to 19,6 mm ).
NOTE See 2.10.5.12 for the minimum number of overlapping layers.
U.2 Type tests
U.2.1 General
The winding wire shall pass the following TYPE TESTS, carried out at a temperature between
15 °C and 35 °C and a relative humidity between 45 % and 75 %, unless otherwise specified.

60950-1 Amend.2 © IEC:2013 – 19 –
U.2.2 Electric strength
U.2.2.1 Solid round winding wires and stranded winding wires
U.2.2.1.1 Wires with a nominal conductor diameter up to and including 0,100 mm
The test specimen is prepared according to 4.3 of IEC 60851-5:2008. The specimen is then
subjected to the electric strength test of 5.2.2 between the conductor of the wire and the
cylinder, with a minimum test voltage of:
− 3 kV r.m.s. or 4,2 kV peak for REINFORCED INSULATION, or
− 1,5 kV r.m.s. or 2,1 kV peak for BASIC INSULATION or SUPPLEMENTARY INSULATION.
U.2.2.1.2 Wires with a nominal conductor diameter over 0,100 mm up to and including
2,500 mm
The test specimen is prepared according to 4.4.1 of IEC 60851-5:2008 (twisted pair). The
specimen is then subjected to the electric strength test of 5.2.2 with a test voltage that is not
less than twice the appropriate voltage of 5.2.2, with a minimum of:
– 6 kV r.m.s. or 8,4 kV peak for REINFORCED INSULATION, or
– 3 kV r.m.s. or 4,2 kV peak for BASIC INSULATION or SUPPLEMENTARY INSULATION.
U.2.2.1.3 Wires with a nominal conductor diameter over 2,500 mm
The test specimen is prepared according to 4.5 of IEC 60851-5:2008. The specimen is then
subjected to the electric strength test of 5.2.2 between the conductor of the wire and the shot,
with a minimum test voltage of:
− 3 kV r.m.s. or 4,2 kV peak for REINFORCED INSULATION, or
− 1,5 kV r.m.s. or 2,1 kV peak for BASIC INSULATION or SUPPLEMENTARY INSULATION.
U.2.2.2 Square or rectangular wires
The test specimen is prepared according to 4.7.1 of IEC 60851-5:2008 (single conductor
surrounded by metal shots). The specimen is then subjected to the electric strength test of
5.2.2, with a minimum test voltage of:
REINFORCED INSULATION, or
− 3 kV r.m.s. or 4,2 kV peak for
− 1,5 kV r.m.s. or 2,1 kV peak for BASIC INSULATION or SUPPLEMENTARY INSULATION.
U.2.3 Flexibility and adherence
Subclause 5.1 (in Test 8) of IEC 60851-3:2009 shall be used, using the mandrel diameters of
Table U.1.
The test specimen is then examined in accordance with 5.1.1.4 of IEC 60851-3:2009, followed
by the electric strength test of 5.2.2 in this standard, with minimum test voltage of:
– 3 kV r.m.s. or 4,2 kV peak for REINFORCED INSULATION, or
– 1,5 kV r.m.s. or 2,1 kV peak for BASIC INSULATION or SUPPLEME
...