EN IEC 60669-2-4:2025
(Main)Switches for household and similar fixed electrical installations - Part 2-4: Particular requirements - Isolating switches
Switches for household and similar fixed electrical installations - Part 2-4: Particular requirements - Isolating switches
IEC 60669-2-4:2024 applies to manually operated general purpose isolating switches with a rated voltage not exceeding 440 V and a rated current not exceeding 125 A, intended for household and similar fixed electrical installations, either indoors or outdoors. This second edition cancels and replaces the first edition published in 2004. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) revision of the present edition with reference to the published IEC 60669-1:2017 Edition 4 with its amendments and references to clauses and tables; b) introducing the values for isolating switches with ratings from 6 A to 13 A; c) introducing a circuit motor load with a rated current not exceeding 10 A and a power factor not less than 0,6 in the scope; d) modification of Table 1 and Table 5.
Schalter für Haushalt und ähnliche ortsfeste elektrische Installationen - Teil 2-4: Besondere Anforderungen - Trennschalter
Interrupteurs pour installations électriques fixes domestiques et analogues - Partie 2-4: Exigences particulières - Interrupteurs-sectionneurs
L’IEC 60669-2-4:2024 s’applique aux interrupteurs-sectionneurs pour usage général manœuvrés manuellement, de tension assignée ne dépassant pas 440 V et de courant assigné ne dépassant pas 125 A, destinés aux installations électriques fixes domestiques et analogues intérieures ou extérieures. Cette deuxième édition annule et remplace la première édition parue en 2004, dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) Révision de la présente édition par rapport à la norme publiée IEC 60669-1:2017 Édition 4, avec ses amendements et références aux articles et tableaux. b) Introduction des valeurs des interrupteurs-sectionneurs dont les caractéristiques assignées sont comprises entre 6 A et 13 A. c) Introduction, dans le domaine d’application, d’un circuit de charge par moteur de courant assigné ne dépassant pas 10 A et de facteur de puissance d’au moins 0,6. d) Modification du Tableau 1 et du Tableau 5.
Stikala za gospodinjstva in podobne nepremične električne inštalacije - 2-4. del: Posebne zahteve - Ločilniki
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2023
Stikala za gospodinjstva in podobne nepremične električne inštalacije - 2-4. del:
Posebne zahteve - Ločilniki
Switches for household and similar fixed electrical installations - Part 2-4: Particular
requirements - Isolating switches
Schalter für Haushalt und ähnliche ortsfeste elektrische Installationen - Teil 2-4:
Besondere Anforderungen - Trennschalter
Interrupteurs pour installations électriques fixes domestiques et analogues - Partie 2-4:
Prescriptions particulières - Interrupteurs-sectionneurs
Ta slovenski standard je istoveten z: prEN IEC 60669-2-4:2023
ICS:
29.120.40 Stikala Switches
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
23B/1460/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60669-2-4 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-06-23 2023-09-15
SUPERSEDES DOCUMENTS:
23B/1415/CDV, 23B/1453A/RVC
IEC SC 23B : PLUGS, SOCKET-OUTLETS AND SWITCHES
SECRETARIAT: SECRETARY:
Italy Mr Cristiano Masini
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Switches for household and similar fixed electrical installations - Part 2-4: Particular
requirements - Isolating switches
PROPOSED STABILITY DATE: 2028
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
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IEC CDV 60069-2-4 © IEC 2023 2 23B/1460/CDV
NOTE FROM TC/SC OFFICERS:
This document is a second CDV on IEC 60669-2-4. The first CDV, even if approved, received many
abstantion, leading to possible negative vote a FDIS stage. MT4 therefore discussed the comments
antroduced some technical changes.
The changes are the deletion of 16.102 (present in the first CDV) and the subsequent introduction of a
In some Country note in 13.101.
IEC CDV 60069-2-4 © IEC 2023 3 23B/1460/CDV
1 CONTENTS
2 INTERNATIONAL ELECTROTECHNICAL COMMISSION
3 ____________
5 SWITCHES FOR HOUSEHOLD AND SIMILAR
6 FIXED ELECTRICAL INSTALLATIONS –
8 Part 2-4: Particular requirements –
9 Isolating switches
12 FOREWORD
13 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
14 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
15 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
16 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
17 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
18 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
19 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
20 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
21 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
22 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an internatio nal
23 consensus of opinion on the relevant subjects since each technical committee has representation from all
24 interested IEC National Committees.
25 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
26 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
27 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
28 misinterpretation by any end user.
29 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
30 transparently to the maximum extent possible in their national and regional publications. Any divergence between
31 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
32 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment
33 declared to be in conformity with an IEC Publication.
34 6) All users should ensure that they have the latest edition of this publication.
35 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
36 members of its technical committees and IEC National Committees for any personal injury, property damage or
37 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
38 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
39 Publications.
40 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
41 indispensable for the correct application of this publication.
42 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
43 rights. IEC shall not be held responsible for identifying any or all such patent rights.
44 International Standard IEC 60669-2-4 has been prepared by subcommittee 23B: Plugs, socket-
45 outlets and switches, of IEC technical committee 23: Electrical accessories.
46 This second edition cancels and replaces the first edition published in 2004 of which it constitutes
47 a technical revision.
48 This edition includes the following significant technical changes with respect to the previous
49 edition:
50 – Revision of the present edition with reference to the published IEC60669-1:2017 Edition
51 4 with its amendments and references to clauses and tables.
52 – Introducing the values for isolating switches with ratings from 6A to 13A.
53 – Introducing a circuit motor load with a rated current not exceeding 10A and a power
54 factor not less than 0.6 in the scope.
IEC CDV 60069-2-4 © IEC 2023 4 23B/1460/CDV
55 – Modification of Tables 1 and 5
56 The text of this standard is based on the following documents:
FDIS Report on voting
23B/xxxx/FDIS 23B/xxxx/RVD
58 Full information on the voting for the approval of this standard can be found in the report on
59 voting indicated in the above table.
60 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
61 This part of IEC 60669 shall be used in conjunction with IEC 60669-1:2017. It lists the changes
62 necessary to convert that standard into a specific standard for isolating switches.
63 When a particular subclause of Part 1 is not mentioned in this part, that subclause applies as
64 far as reasonable.
65 In this publication,
66 • the following print types are used:
67 – requirements proper: in roman type;
68 – test specifications: in italic type;
69 – notes: in smaller roman type;
70 • subclauses, figures, tables or notes which are additional to those in Part 1 are numbered
71 starting from 101. Annexes additional to those in Part 1 are lettered AA, BB, etc.
72 The committee has decided that the contents of this publication will remain unchanged until
73 2008. At this date, the publication will be
74 • reconfirmed;
75 • withdrawn;
76 • replaced by a revised edition, or
77 • amended.
IEC CDV 60069-2-4 © IEC 2023 5 23B/1460/CDV
79 SWITCHES FOR HOUSEHOLD AND SIMILAR
80 FIXED ELECTRICAL INSTALLATIONS –
82 Part 2-4: Particular requirements –
83 Isolating switches
86 1 Scope
87 This clause of Part 1 applies except as follows.
88 Replacement of the first paragraph:
89 This part of IEC 60669 applies to manually operated general purpose isolating switches with a
90 rated voltage not exceeding 440 V and a rated current not exceeding 125 A, intended for
91 household and similar fixed electrical installations, either indoors or outdoors.
92 Replacement of the fifth dash of the fourth paragraph:
93 - a monophase circuit for motor load with a rated current up to 10 A and a power factor not less
94 than 0,6;
96 NOTE Isolating switches are designed for overvoltage category III and used in environment of pollution degree 2
97 according to IEC 60664-1.
98 2 Normative references
99 This clause of Part 1 applies except as follows.
100 Addition:
101 IEC 60669-1:2017, Switches for household and similar fixed electrical installations – Part 1:
102 General requirements
103 IEC 61180:2016, High-voltage test techniques for low voltage equipment – Definitions, test and
104 procedure requirements, test equipment
105 3 Terms and definitions
106 This clause of Part 1 applies except as follows.
107 Additional definitions:
108 3.101
109 isolating switch
110 switch designed to provide isolation of the installation or part of the installation and equipment
111 from the supply and to carry and to make and break the current in all line current carrying poles
112 3.102
113 rated conditional short-circuit current
114 I
nc
115 value of the AC component of a prospective current assigned by the manufacturer, which a
116 switch without integral short-circuit protection, but protected by a suitable short-circuit
117 protective device (hereinafter referred to as SCPD) in series, can withstand under specified
118 conditions of use and behaviour
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120 3.103
121 joule integral
122 I t
123 integral of the square of the current over a given time interval (t , t )
0 1
t
2 2
124 I t = i dt
t
125 4 General requirements
126 This clause of Part 1 applies.
127 5 General remarks on tests
128 This clause of Part 1 applies except as follows.
129 Replace Table 1 with the following
130 Table 1 – Number of specimens needed for the tests
Number of
additional
Number
Clauses and subclauses specimens for
of specimens
dual current
rating
6 Ratings A
7 Classification A
8 Marking A
9 Checking of dimensions ABC
10 Protection against electric shock ABC
11 Provision for earthing ABC
a,f,l
12 ABC JKL
Terminals
b, m
13 ABC
Constructional requirements
14 Mechanism ABC
15 Resistance to ageing, protection provided by enclosures of
ABC
switches, and resistance to humidity
c
16 Insulation resistance and electric strength ABC
17 Temperature rise ABC JKL
i
18 Making and breaking capacity ABC JKL
i
19 Normal operation JKL
ABC
d,g
20 ABC
Mechanical strength
h
21 Resistance to heat ABC
22 Screws, current-carrying parts and connections ABC
Creepage distances, clearances and distances through sealing
23 ABC
compound
l
16.101 XYZ
Impulse test
m
18.101 Short circuit withstand capability XYZ + PQR
19.2
Test for switches intended for externally ballasted lamp loads DEF MNO
19.3
Test for switches intended for self ballasted lamp loads UVW XYZ
24.1 Resistance to abnormal heat and to fire GHI
e
24.2 GHI
Resistance to tracking
25 Resistance to rusting GHI
TOTAL 18 9
IEC CDV 60069-2-4 © IEC 2023 7 23B/1460/CDV
Number of
additional
Number
Clauses and subclauses specimens for
of specimens
dual current
rating
a
Five extra screwless terminals are used for the test of 12.3.11 and one extra set of specimens is used for the
test of 12.3.12.
b
An extra set of membranes are needed for each of the tests of 13.15.1 and 13.15.2.
c
One extra set of specimens of switches fitted with pilot light may be used for the tests of Clause 16.
d
One extra set of specimens of cord-operated isolating switches is needed for the test of 20.10.
e
One extra set of specimens may be used.
f
Two extra set of specimens of terminals suitable for rigid and flexible conductors are required for 12.2.5, 12.2.6
and 12.2.7.
g
One extra set of specimens is needed for the tests of 20.5.1 and 20.5.2.
h
One extra set of specimens may be used for the tests of 21.2 and 21.3. In this case the specimens shall be
subjected first to the tests of 15.1.
i
Number of specimens required for insulation-piercing terminals (IPTs) are shown in Table D.1
j
For switches with pilot light units if the electronic circuitry is so enclosed that the short-circuiting or
disconnecting of components is impossible or difficult, the manufacturer shall provide additional prepared test
specimens.
k
For isolating switches of pattern number 2 one extra set of specimens is used.
l
Test to be carried out only if the clearance of item 6 of Clause 23 is lower than 4 mm.
m
For the test of 18.101 six additional specimens are used.
132 6 Ratings
133 This clause of Part 1 applies except as follows.
134 6.2 Modification:
135 In the first paragraph, add the values “80 A, 100 A and 125 A.”
136 6.3 Preferred combinations of number of poles and ratings
137 Replacement in Table 3, first column, last line, of the values “16, 20, 25, 32, 40, and 63” by
138 “equal to or greater than 16”.
139 Additional subclause:
140 6.101 Standard and preferred values of the rated conditional short-circuit current (I )
nc
141 NOTE The associated power-factors are specified in Table 103.
142 6.101.1 Values up to and including 10 000 A
143 The standard values of the rated conditional short-circuit current (I ) are:
nc
144 1 500 A, 3 000 A, 4 500 A, 6 000 A and 10 000 A.
145 6.101.2 Values above 10 000 A
146 The preferred values are:
147 15 000 A, 20 000 A and 25 000 A.
148 Values above 25 000 A are not considered by this standard.
IEC CDV 60069-2-4 © IEC 2023 8 23B/1460/CDV
149 7 Classification
150 This clause of Part 1 applies except as follows.
151 7.1. Addition:
152 Isolating switches shall be only of pattern numbers 1, 2, 3 or 03.
153 7.2 This subclause of Part 1 is not applicable.
154 7.6 Addition:
155 – rail-type
156 8 Marking
157 This clause of Part 1 applies except as follows.
158 8.1 General
159 Modify as follows:
160 f), g) and h) are not applicable
161 Addition:
162 n) symbols for open position (OFF) and closed position (ON),
163 o) symbol for isolating function,
164 p) rated conditional short-circuit current (I ).
nc
165 The manufacturer shall provide reference(s) of one or more short circuit protection devices
166 (SCPDs) in his catalogue or in the instructions which are provided with the isolating switch or
167 both.
168 8.2 Symbols
169 Modify as follows:
170 Symbols for mini-gap construction, micro-gap constructions and without contact gap are not
171 applicable
172 Addition:
173 – isolating function .
174 – rated conditional short-circuit current . I
nc
175 8.3 Visibility of markings
176 Addition
177 Isolating switches shall be marked with the symbols for isolating function and for the closed and
178 open position. These markings shall be visible from the front after installation, even after
179 removal of the front cover of the enclosure when the isolating switch is mounted and wired as
180 in normal use. The isolating symbol may be included in a wiring diagram even combined with
181 symbols of other functions, provided that it is visible from the front under the conditions
182 specified.
IEC CDV 60069-2-4 © IEC 2023 9 23B/1460/CDV
183 The marking for the rated conditional short-circuit current (I ) shall be on the isolating switch
nc
184 or in the manufacturer's documentation.
185 8.6 Marking of the switch position
186 Replacement of the first sentence of the first paragraph
187 Isolating switches shall be so marked that the actual contact position is clearly indicated.
188 Deletion of Note 1 and Note 2.
189 9 Checking of dimensions
190 This clause of Part 1 applies.
191 10 Protection against electric shock
192 This clause of Part 1 applies except as follows.
193 10.3.1 Replacement of the first two lines:
194 Accessible parts of isolating switches shall be made of insulating material, with the exception
195 of the following:
196 11 Provision for earthing
197 This clause of Part 1 applies.
198 12 Terminals
199 This clause of Part 1 applies except as follows.
200 12.2.1 Addition to Table 4:
201 Table 4 – Relationship between rated currents and connectable cross-sectional areas
202 of copper conductors
c
Ranges of rated currents Rigid conductors (solid or stranded)
Nominal cross-sectional areas
Diameter of largest conductor
A
mm mm
Above 50 up to and including 80 From 10 up to 25 inclusive 6,85
Above 80 up to and including 100 From 16 up to 35 inclusive 7,90
Above 100 up to and including 125 From 25 up to 50 inclusive 9,10
IEC CDV 60069-2-4 © IEC 2023 10 23B/1460/CDV
205 12.2.5 Replacement of Table 5:
206 Table 5– Tightening torque for verification of the mechanical strength
207 of screw-type terminals
Nominal diameter of thread Torque
mm Nm
1 2 3 4 5
Up to and including 2,8 0,2 – 0,4 0,4 –
Above 2,8 up to and including 3,0 0,25 – 0,5 0,5 –
Above 3,0 up to and including 3,2 0,3 – 0,6 0,6 –
Above 3,2 up to and including 3,6 0,4 – 0,8 0,8 –
Above 3,6 up to and including 4,1 0,7 1,2 1,2 1,2 1,2
Above 4,1 up to and including 4,7 0,8 1,2 1,8 1,8 1,8
Above 4,7 up to and including 5,3 0,8 1,4 2,0 2,0 2,0
Above 5,3 up to and including 6,0 1,2 1,8 2,5 3,0 3,0
Above 6,0 up to and including 8,0 2,5 2,5 3,5 6,0 4,0
Above 8,0 up to and including 10,0 – 3,5 4,0 10,0 6,0
Above 10,0 up to and including 12,0 – 4,0 – – 8,0
Above 12,0 up to and including 15,0 – 5,0 – – 10,0
NOTE 1 Column 1 applies to screws without heads if the screw when tightened does not protrude from the hole,
and to other screws which cannot be tightened by means of a screwdriver with a blade wider than the diameter of
the screw.
Column 2 applies to nuts of mantle terminals which are tightened by means of a screwdriver.
Column 3 applies to other screws which are tightened by means of a screwdriver.
Column 4 applies to nuts of mantle terminals in which the nut is tightened by means other than a screwdriver.
Column 5 applies to screws or nuts, other than nuts of mantle terminals, which are tightened by means other than
a screwdriver.
Where a screw has a hexagonal head with a slot for tightening with a screwdriver and the values of columns 3 and
5 are different, the test is made twice, first applying to the hexagonal head the torque specified in column 5 and
then applying the torque specified in column 3 by means of a screwdriver. If the values of columns 3 and 5 are the
same, only the test with the screwdriver is made.
NOTE 2 For mantle terminals the specified nominal diameter is that of the slotted stud.
NOTE 3 The shape of the blade of the test screwdriver should suit the head of the screw to be tested.
NOTE 4 The screws and nuts should not be tightened in jerks.
209 12.2.5 Addition to Table 6:
210 Table 6 – Test values for flexion and pull-out for copper conductors
c
Conductor Diameter Height H Mass
a b
cross-sectional area of bushing hole mm for conductor
mm mm kg
35 14,5 320 6,8
50 16 340 9,5
IEC CDV 60069-2-4 © IEC 2023 11 23B/1460/CDV
213 12.2.6 Addition to Table 7:
214 Table 7 – Test values for pulling out test
Cross-
sectional
area of
conductors
connected to
35 50
the terminal
mm
Pull 190 235
N
216 13 Constructional requirements
217 This clause of Part 1 applies except as follows.
218 13.12 Addition to Table 13:
219 Table 13 – External cable diameter limits for surface type switches
Limits of external diameter
Cross-sectional
Rated
of cables
Number
areas
current
of conductors
2 Minimum Maximum
A
mm
mm mm
2 —
80 3 37,1
16 up to and including 35 15,5
100 4 41,1
5 —
2 —
3 42,9
125 25 up to and including 50 18,5
4 47,5
5 —
221 Addition
222 13.101 Indication of the contact position
223 Isolating switches when in the open position shall provide an isolation distance in accordance
224 with the requirements necessary to satisfy the isolating function.
225 Indication of the contact position shall be provided by the position of the actuating member or
226 by other suitable means or both.
227 NOTE A pilot light alone is not considered as suitable means.
228 The actuating member shall be connected to the moving contacts in a reliable way. The
229 actuating member shall not indicate the open position unless all the moving contacts are in the
230 open position.
231 Isolating switches shall be so designed that the actuating member can only be fitted in a manner
232 which ensures correct contact position and correct locking if the isolating switch is provided
233 with means for locking. When means are provided or specified by the manufacturer to lock the
234 isolating switch in the open position, locking in that position shall only be possible when the
235 contacts are in the open position.
IEC CDV 60069-2-4 © IEC 2023 12 23B/1460/CDV
236 NOTE In the following country the test of IEC 60947-1, clause 8.2.5 is required to verify the requirement of 13.101:
237 AU, CA
239 Compliance is checked by inspection and by the tests of clause 16.101.
240 14 Mechanism
241 This clause of Part 1 applies.
242 15 Resistance to ageing, protection provided by enclosures of switches and
243 resistance to humidity
244 This clause of Part 1 applies.
245 16 Insulation resistance and electric strength
246 This clause of Part 1 applies except as follows.
247 Addition
248 16.101 Impulse voltage test
249 Isolating switches shall be suitable for isolation.
250 Compliance is checked by the following test.
251 The test is performed on new specimens, in clean and dry conditions.
252 The 1,2/50 impulse voltage according to Figure 1 of IEC 61180:2016 is applied between the
253 line terminals connected together and the load terminals connected together with the contacts
254 in the open position.
255 The impulses are given by a generator producing positive and negative impulses having a front
256 time of 1,2 µs and a time to half value of 50 µs, the tolerances being
257 ± 5 % for the peak value;
258 ± 30 % for the front time;
259 ± 20 % for the time to half value.
260 The shape of the impulses is adjusted with the isolating switch under test connected to the
261 impulse generator. For this purpose appropriate voltage dividers and voltage sensors shall be
262 used.
263 Small oscillations in the impulses are allowed, provided that their amplitude near the peak of
264 the impulse is less than 5 % of the peak value.
265 For oscillations on the first half of the front, amplitudes up to 10 % of the peak value are allowed.
266 The test voltage shall be chosen from Table 101, in accordance with the rated voltage of the
267 isolating switch.
268 The impulse voltage shall be applied 3 times at intervals of 1 s minimum.
269 There shall be no discharges during the test.
IEC CDV 60069-2-4 © IEC 2023 13 23B/1460/CDV
270 The surge impedance of the test apparatus should be 500 Ω.
271 NOTE The expression “discharge“ is used to cover the phenomena associated with the failure of insulation under
272 electric stress, which includes current flow and a drop in voltage.
IEC CDV 60069-2-4 © IEC 2023 14 23B/1460/CDV
274 Table 101 – Test voltage and corresponding altitudes
Rated voltage Test voltage [kV] and corresponding altitudes above sea level [m]
V Sea level 200 500 1 000 2 000
Not exceeding
3,5 3,5 3,4 3,2 3
130 V
Exceeding
6,2 6 5,8 5,6 5
130 V
276 17 Temperature rise
277 This clause of Part 1 applies except as follows.
278 17.1 General
279 Addition toTable 16:
280 Table 16 – Temperature-rise test currents and cross-sectional areas
281 of copper conductors
Nominal cross-sectional
Rated current Test current area of conductors
A A
mm
80 90 25
100 115 35
125 145 50
283 Replacement in note a of Table 16 of the word “switches” by “isolating switches”.
284 Replacement of the penultimate paragraph before Note 3:
285 The temperature rise of the terminals s
...
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