IEC 60730-1:2010

IEC 60730-1
®
Edition 4.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Automatic electrical controls for household and similar use –
Part 1: General requirements

Dispositifs de commande électrique automatiques à usage domestique et
analogue –
Partie 1: Exigences générales

IEC 60730-1:2010

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IEC 60730-1
®
Edition 4.0 2010-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Automatic electrical controls for household and similar use –
Part 1: General requirements

Dispositifs de commande électrique automatiques à usage domestique et
analogue –
Partie 1: Exigences générales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XH
CODE PRIX
ICS 97.120 ISBN 2-8318-1080-9
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 60730-1 © IEC:2010
CONTENTS
FOREWORD.6
1 Scope and normative references.9
2 Definitions .13
3 General requirements .35
4 General notes on tests.35
5 Rating.38
6 Classification .38
7 Information .46
8 Protection against electric shock.54
9 Provision for protective earthing.57
10 Terminals and terminations.60
11 Constructional requirements .68
12 Moisture and dust resistance .84
13 Electric strength and insulation resistance.87
14 Heating.90
15 Manufacturing deviation and drift .96
16 Environmental stress .97
17 Endurance .98
18 Mechanical strength.108
19 Threaded parts and connections . 114
20 Creepage distances, clearances and distances through solid insulation. 117
21 Resistance to heat, fire and tracking . 126
22 Resistance to corrosion . 128
23 Electromagnetic compatibility (EMC) requirements – emission . 129
24 Components .130
25 Normal operation .131
26 Electromagnetic compatibility (EMC) requirements – immunity . 131
27 Abnormal operation.131
28 Guidance on the use of electronic disconnection . 133
Annex A (normative) Indelibility of markings . 154
Annex B (normative) Measurement of creepage distances and clearances in air . 156
Annex C (normative) Cotton used for mercury switch test (not applicable in the
countries members of CENELEC). 162
Annex D (informative) Heat, fire and tracking. 163
Annex E (normative) Circuit for measuring leakage current. 164
Annex F (informative) Fire hazard testing . 166
Annex G (normative) Heat and fire resistance tests . 167
Annex H (normative) Requirements for electronic controls . 169
Annex J (normative) Requirements for controls using thermistors . 229
Annex K (informative) Nominal voltages of supply systems for different modes of
overvoltage control. 236
Annex L (normative) Overvoltage categories. 238

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60730-1 © IEC:2010 – 3 –
Annex M (informative) Typical usage . 239
Annex N (normative) Pollution degrees. 240
Annex P (normative) Printed circuit board coating performance test. 241
Annex Q (normative) Printed circuit board coating performance test . 243
Annex R (informative) Explanatory notes for surge immunity test . 246
Annex S (informative) Guidance for applying Clause 20. 251
Annex T (normative) Requirements for SELV and PELV . 253
Annex U (normative) Requirements for relays when used as controls in IEC 60335
appliances . 256
Bibliography . 259

Figure 1 – Test pin . 134
Figure 2 – Standard test finger . 135
Figure 3 – Test nail . 136
Figure 4 – Impact test for free-standing controls . 137
Figure 5 – Tumbling barrel . 137
Figure 6 – Ball-pressure apparatus. 138
Figure 7 – Void . 138
Figure 8 – Apparatus for testing durability of markings on rating labels . 139
Figure 9 – Apparatus for flexing test . 140
Figure 10 – Screw terminals and stud terminals. 141
Figure 11 – Pillar terminals.143
Figure 12 – Mantle terminals .144
Figure 13a – Saddle terminals . 145
Figure 13b – Lug terminals.145
Figure 14 – Tabs. 146
Figure 15 – Tabs for non-reversible connectors . 147
Figure 16 – Receptacles.148
Figure 17 – Measurement of creepage and clearance. 149
Figure 25 – Diagram for leakage current measurement at operating temperature for
single-phase connection of class II controls. 151
Figure 26 – Diagram for leakage current measurement at operating temperature for
single-phase connection of control other than class II . 151
Figure 27 – Diagram for leakage current measurement at operating temperature for
three-phase connection of class II controls . 152
Figure 28 – Diagram for leakage current measurement at operating temperature for
three-phase connection of controls other than those of class II . 152
Figure 29 – Diagram for leakage current measurement at operating temperature for
single-phase connection of control other than class II . 153
Figure 30 – Diagram for leakage current measurement at operating temperature for two-
phase connection of control to three-wire, ground neutral supply other than class II . 153
Figure E.1 – Circuit for measuring leakage currents. 165
Figure H.1 – V-Model for the software life cycle . 194
Figure H.2 – (H.26.5.4.2 of the previous edition) – Voltage variation test. 207

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– 4 – 60730-1 © IEC:2010
Figure H.3 (H.26.10.1 of the previous edition) – Ring wave characteristics (open-circuit
voltage). 212
Figure H.4 (H.26.10.2 of the previous edition) – Schematic of a ring wave generator
0,5 s/100 kHz. 212
Figure H.5 (H.27.1.1 of the previous edition) – Example of an electronic circuit with low
power points . 218
Figure P.1 − Test sample. 242
Figure Q.1 – Test sample. 244
Figure Q.2 – Examples of land configurations (see also Figure Q.1) . 245
Figure R.1 – Example of surge protection by shielding in buildings with common earth
reference systems. 249
Figure R.2 – Example of secondary surge protection in buildings with separate common
earth reference systems. 249
Figure R.3 – Example of primary and secondary surge protection of indoor/outdoor
equipment. 250

Table 1 (7.2 of the previous edition) .49
Table 2 (9.3.2 of the previous edition) .59
Table 3 (10.1.4 of the previous edition).61
Table 4 (10.1.8 of the previous edition).63
Table 5 (10.1.9 of the previous edition).64
Table 6 (10.2.1 of the previous edition).66
Table 7 (10.2.4.2 of the previous edition) – Material and plating for tabs .67
Table 8 (10.2.4.3 of the previous edition).68
Table 9 (11.7.2 of the previous edition).78
Table 10 (11.8.2 of the previous edition).79
Table 11 (13.1 of the previous edition).87
14)
Table 12 (13.2 of the previous edition) .88
Table 13 (14.1 of the previous edition).93
Table 14 (17.2.1 of the previous edition) – Electrical conditions for the overvoltage test
(this table applies in all countries except Canada, and the USA) . 100
Table 15 (17.2.2 of the previous edition) – Electrical conditions for the overload tests of
17.7 and 17.10 (this table applies in Canada,  USA, and all countries which use an
overload test).101
Table 16 (17.2.3 of the previous edition) – Electrical conditions for the overload tests of
17.8, 17.9, 17.11, 17.12 and 17.13 (this table applies in Canada, USA, and all countries
which use an overload test).102
Table 17 (18.4.1 of the previous edition) – Minimum thickness of sheet metal for

enclosures made of carbon steel or stainless steel . 110
Table 18 (18.4.2 of the previous edition) Minimum thickness of sheet metal for
enclosures of aluminium, copper or brass. 111
Table 19 (18.7 of the previous edition). 113
Table 20 (19.1 of the previous edition). 115
Table 21 (20.1 of the previous edition) – Rated impulse voltage for equipment energized
directly from the supply mains (from IEC 60664-1, Annex F, table F.1). 118
Table 22 (20.2 of the previous edition) – Clearances for insulation co-ordination (from
IEC 60664-1, Annex F, table F.2) . 119

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60730-1 © IEC:2010 – 5 –
Table 23 (20.3 of the previous edition) – Minimum creepage distances for basic
insulation . 123
Table 24 (20.4 of the previous edition) – Minimum creepage distances for operational
insulation . 124
Table 25 (21.4 of the previous edition) – Mercury switch short-circuit conditions . 128
Table 26 (27.2.3 of the previous edition) – Maximum winding temperature (for test of
mechanical blocked output conditions) . 132
6)
Table H.1 (H.11.12.7 of the previous edition) . 188
Table H.2 – Semi formal methods .194
Table H.3 – Software architecture specification . 195
Table H.4 – Module design specification. 196
Table H.5 – Design and coding standards. 196
Table H.6 – Software module testing . 197
Table H.7 – Software integration testing . 198
Table H.8 – Software safety validation. 198
Table H.9 (H.11.12.6 of the previous edition) – Combinations of analytical measures
during hardware development. 199
Table H.10 (H.23 of the previous edition) – Emission. 203
Table H.11 (H.26.2.1 of the previous edition) – Applicable test levels. 204
Table H.12 (H.26.5.2 of the previous edition) – Test values for voltage dips and
interruptions. 205
Table H.13 (H.26.5.4.2 of the previous edition) – Timing of short-term supply voltage
variations . 206
Table H.14 (H.26.8.2 of the previous edition) – Test voltages for test level 2 (depending
on the installation class conditions) . 209
Table H.15 (H.26.9.2 of the previous edition) – Test application for electrical fast
transient burst test . 210
Table H.16 (H.26.10.4 of the previous edition) – Peak voltages. 211
Table H.17 (H.26.12.2.1 of the previous edition) – Test levels for conducted
disturbances on mains and I/O lines .213
Table H.18 (H.26.12.3.1 of the previous edition) – Immunity to radiated electromagnetic
fields. 214
Table H.19 (H.26.13.2 of the previous edition) − Test values for supply frequency
variations . 215
Table H.20 (H.26.14.2 of the previous edition) – Test level for continuous fields . 216
Table H.21 (H.27.1 of the previous edition) – Electrical/electronic component fault
modes table . 220
Table J.1 (7.2 of the previous edition). 231
Table K.1 – Inherent control or equivalent protective control . 236
Table K.2 – Cases where protective control is necessary and control is provided by
surge arresters having a ratio of clamping voltage to rated voltage not smaller than that
specified by IEC 60099-1 . 237
Table M.1 – Typical usage. 239
Table P.1 – Environmental cycling conditions . 242

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– 6 – 60730-1 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

AUTOMATIC ELECTRICAL CONTROLS
FOR HOUSEHOLD AND SIMILAR USE –

Part 1: General requirements


FOREWORD
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International Standard IEC 60730-1 has been prepared by IEC technical committee 72:
Automatic controls for household use.
This fourth edition cancels and replaces the third edition published in 1999, Amendment 1
(2003), and Amendment 2 (2007).
The main technical modifications of this standard since this previous publication are listed
...