IEC 60730-1:2013
(Main)Automatic electrical controls - Part 1: General requirements
Automatic electrical controls - Part 1: General requirements
IEC 60730-1:2013 applies to automatic electrical controls for use in, on, or in association with equipment for household and similar use. The equipment may use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof. This standard is applicable to controls for building automation within the scope of ISO 16484. This standard also applies to automatic electrical controls for equipment that may be used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications. This standard is also applicable to individual controls utilized as part of a control system or controls which are mechanically integral with multifunctional controls having non electrical outputs. This standard is also applicable to relays when used as controls for IEC 60335 appliances. Additional requirements for the safety and operating values of relays when used as controls for IEC 60335 appliances are contained in Annex U. This standard does not apply to automatic electrical controls intended exclusively for industrial process applications unless explicitly mentioned in the relevant part 2 or the equipment standard. This fifth edition cancels and replaces the fourth edition published in 2010. It constitutes a technical revision. The major changes with respect to the previous edition are as follows:
- modification of the title and scope;
- revisions to Clause H.26 based on changes in technology, applications, and to improve consistency and layout;
- modification to Table H.12 to align with CISPR 22;
- revisions to Annex J to correlate the fault modes of thermistors and to exempt thermistors used in conjunction with type 1 controls in SELV low power circuits from the tests specified in Annex J;
- new requirements covering battery-powered controls, and the use of batteries in controls;
- revision addressing the exclusion of relay faults;
- new/updated requirements in Clause 24, for switch mode power supplies;
- revisions covering the allowance of screwless-type clamping units complying with IEC 60999-1;
- new requirements addressing remotely actuated control functions;
- addition of a new/updated leakage current diagram to align the Annex E diagram with the diagram in IEC 60990 and updated requirements for temperature sensing controls. Key words: controls, electrical controls, automatic The contents of the corrigendum of September 2014 have been included in this copy.
Dispositifs de commande électrique automatiques - Partie 1: Exigences générales
La IEC 60730-1:2013 s'applique aux dispositifs de commande électrique automatiques destinés à être utilisés dans, sur, ou avec des équipements à usage domestique et analogue. Les matériels peuvent utiliser l'électricité, le gaz, le pétrole, des combustibles solides, l'énergie thermique solaire, etc., ou une combinaison de ces sources d'énergie. La présente norme s'applique aux dispositifs de commande pour l'automatisation du bâtiment relevant du domaine d'application de l'ISO 16484. La présente norme s'applique également aux dispositifs de commande électriques automatiques des équipements qui peuvent être utilisés par le public (les équipements destinés à être utilisés dans des magasins, des bureaux, des hôpitaux, des fermes et des applications commerciales et industrielles, par exemple). La présente norme est également applicable aux dispositifs de commande individuels utilisés comme partie d'un système de commande ou de dispositifs de commande solidaires mécaniquement de dispositifs de commande multifonctions ayant des sorties non électriques. La présente norme s'applique également aux relais utilisés en tant que dispositifs de commande des appareils conformes à la CEI 60335. L'Annexe U contient des exigences supplémentaires relatives à la sécurité et aux valeurs de fonctionnement des relais utilisés en tant que dispositifs de commande des appareils conformes à la CEI 60335. La présente norme ne s'applique pas aux dispositifs de commande électrique automatiques prévus exclusivement pour des applications industrielles, sauf mention particulière dans la partie 2 ou la norme de l'équipement. Cette cinquième édition annule et remplace la quatrième édition parue en 2010. Elle constitue une révision technique. Les principales modifications apportées par rapport à l'édition précédente sont les suivantes:
- modification du titre et du domaine d'application;
- révisions de l'Article H.26 sur la base des évolutions en termes de technologie et d'applications, et afin d'améliorer la cohérence et la présentation;
- modification du Tableau H.12 pour alignement avec la CISPR 22;
- révisions de l'Annexe J pour corrélation avec les modes de panne des thermistances, et exemption des thermistances utilisées conjointement avec les dispositifs de commande de type 1 en circuits TBTS de faible puissance à partir des essais spécifiés à l'Annexe J;
- nouvelles exigences concernant les dispositifs de commande alimentés par pile, et utilisation de piles dans les dispositifs de commande;
- révision concernant l'exclusion des pannes de relais;
- exigences nouvelles/mises à jour à l'Article 24, pour les alimentations en mode de commutation;
- révisions concernant les tolérances pour les organes de serrage sans vis conformes à la CEI 60999-1;
- nouvelles exigences concernant les fonctions de commande à distance;
- addition d'un diagramme de courant de fuite nouveau/mis à jour pour alignement du diagramme de l'Annexe E avec le diagramme de la CEI 60990 et exigences mises à jour pour les dispositifs de commande sensibles à la température. Mots-clés : commande, commande électrique, automatique Le contenu du corrigendum de septembre 2014 a été pris en considération dans cet exemplaire.
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IEC 60730-1 ®
Edition 5.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
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IEC 60730-1 ®
Edition 5.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 97.120 ISBN 978-2-8322-1175-5
– 2 – 60730-1 © IEC:2013
CONTENTS
CONTENTS . 2
FOREWORD . 7
1 Scope and normative references . 10
2 Terms and definitions . 14
3 General requirements . 36
4 General notes on tests . 37
5 Rating. 40
6 Classification . 40
7 Information . 48
8 Protection against electric shock . 56
9 Provision for protective earthing . 59
10 Terminals and terminations . 62
11 Constructional requirements . 70
12 Moisture and dust resistance . 88
13 Electric strength and insulation resistance . 90
14 Heating . 93
15 Manufacturing deviation and drift . 99
16 Environmental stress . 100
17 Endurance . 101
18 Mechanical strength . 110
19 Threaded parts and connections . 117
20 Creepage distances, clearances and distances through solid insulation . 120
21 Resistance to heat, fire and tracking . 129
22 Resistance to corrosion . 131
23 Electromagnetic compatibility (EMC) requirements – Emission . 132
24 Components . 133
25 Normal operation . 135
26 Electromagnetic compatibility (EMC) requirements – Immunity . 135
27 Abnormal operation . 135
28 Guidance on the use of electronic disconnection . 138
Annex A (normative) Indelibility of markings . 158
Annex B (normative) Measurement of creepage distances and clearances in air . 160
Annex C (normative) Cotton used for mercury switch test (not applicable in the
countries members of CENELEC) . 165
Annex D (informative) Heat, fire and tracking . 166
Annex E (normative) Circuit for measuring leakage current . 167
Annex F (informative) Fire hazard testing . 168
Annex G (normative) Heat and fire resistance tests. 169
Annex H (normative) Requirements for electronic controls . 171
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 236
60730-1 © IEC:2013 – 3 –
Annex K (informative) Nominal voltages of supply systems for different modes of
overvoltage control . 254
Annex L (normative) Overvoltage categories . 256
Annex M (informative) Typical usage . 257
Annex N (normative) Pollution degrees . 258
Annex P (normative) Printed circuit board coating performance test . 259
Annex Q (normative) Printed circuit board coating performance test . 261
Annex R (informative) Explanatory notes for surge immunity test . 264
Annex S (informative) Guidance for applying Clause 20 . 269
Annex T (normative) Requirements for SELV and PELV . 271
Annex U (normative) Requirements for relays when used as controls in IEC 60335
appliances . 274
Annex V (normative) Requirements for controls powered by secondary batteries
(rechargeable) . 277
Bibliography . 279
Figure 1 – Test pin . 138
Figure 2 – Standard test finger . 139
Figure 3 – Test nail . 140
Figure 4 – Impact test for free-standing controls . 141
Figure 5 – Tumbling barrel . 141
Figure 6 – Ball-pressure apparatus . 142
Figure 7 – Void . 142
Figure 8 – Apparatus for testing durability of markings on rating labels . 142
Figure 9 – Apparatus for flexing test . 143
Figure 10 – Screw terminals and stud terminals (1 of 2) . 144
Figure 11 – Pillar terminals . 146
Figure 12 – Mantle terminals . 147
Figure 13 – Saddle and lug terminals . 148
Figure 14 – Tabs . 149
Figure 15 – Tabs for non-reversible connectors . 150
Figure 16 – Receptacles . 151
Figure 17 – Measurement of creepage distance and clearance . 152
Figures 18 to 24 Void . 153
Figure 25 – Diagram for leakage current measurement at operating temperature for
single-phase connection of class II controls . 153
Figure 26 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 154
Figure 27 – Diagram for leakage current measurement at operating temperature for
three-phase connection of class II controls . 155
Figure 28 – Diagram for leakage current measurement at operating temperature for
three-phase connection of controls other than class II . 156
Figure 29 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 156
– 4 – 60730-1 © IEC:2013
Figure 30 – Diagram for leakage current measurement at operating temperature for
two-phase connection of controls to three-wire, ground neutral supply other than class
II . 157
Figure B.1 – Narrow groove . 161
Figure B.2 – Wide groove . 161
Figure B.3 – V-shaped groove . 161
Figure B.4 – Rib . 162
Figure B.5 – Uncemented joint with narrow groove . 162
Figure B.6 – Uncemented joint with wide groove . 162
Figure B.7 – Uncemented joint with narrow and wide grooves . 163
Figure B.8 – Diverging side walls . 163
Figure B.9 – Narrow recess . 164
Figure B.10 – Wide recess . 164
Figure B.11 – Conductive floating part . 164
Figure E.1 – Circuit for measuring leakage currents . 167
Figure H.1 – V-Model for the software life cycle . 197
Figure H.2 – Voltage variation test . 213
Figure H.3 – Ring wave characteristics (open-circuit voltage) . 217
Figure H.4 – Schematic of a ring wave generator 0,5 μs /100 kHz . 218
Figure H.5 – Example of an electronic circuit with low power points . 224
Figure J.1 – Test circuit for inrush-current limiting thermistor endurance test . 252
Figure P.1 – Test sample . 260
Figure Q.1 – Test sample . 262
Figure Q.2 – Examples of land configurations (see also Figure Q.1) . 263
Figure R.1 – Example of surge protection by shielding in buildings with common earth
reference systems . 267
Figure R.2 – Example of secondary surge protection in buildings with separate
common earth reference systems . 267
Figure R.3 – Example of primary and secondary surge protection of indoor/outdoor
equipment . 268
Figure S.1 – Guidance flowchart for application of requirements of Clause 20 . 269
Table 1 (7.2 of edition 3) – Required information and methods of providing information
(1 of 4) . 50
Table 2 (9.3.2 of edition 3) – Quick connect terminal dimensions (Canada and USA) . 61
Table 3 (10.1.4 of edition 3) – Minimum cross-sectional area of conductors . 63
Table 4 (10.1.8 of edition 3) – Terminal conductors . 65
Table 5 (10.1.9 of edition 3) – Conductor pull test values . 66
Table 6 (10.2.1 of edition 3) – Nominal cross-sectional areas of conductors . 68
Table 7 (10.2.4.2 of edition 3) – Material and plating for tabs . 69
Table 8 (10.2.4.3 of edition 3) – Axial force values for tab insertion and withdrawal . 69
Table 9 (11.7.2 of edition 3) – Pull and torque values . 80
Table 10 (11.8.2 of edition 3) – Minimum cord conductor sizes . 81
Table 11 (13.1 of edition 3) – Minimum insulation resistance . 91
a
Table 12 (13.2 of edition 3) – Insulation or disconnection test voltages (1 of 2) . 91
60730-1 © IEC:2013 – 5 –
Table 13 (14.1 of edition 3) – Maximum heating temperatures (1 of 3) . 96
Table 14 (17.2.1 of edition 3) – Electrical conditions for the overvoltage test (this table
applies in all countries except Canada, and the USA) . 103
Table 15 (17.2.2 of edition 3) – 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) . 104
Table 16 (17.2.3 of edition 3) – 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) . 105
Table 17 (18.4.1 of edition 3) – Minimum thickness of sheet metal for enclosures made
of carbon steel or stainless steel . 113
Table 18 (18.4.2 of edition 3) – Minimum thickness of sheet metal for enclosures of
aluminium, copper or brass . 114
Table 19 (18.7 of edition 3) – Pull-cord force test values . 116
Table 20 (19.1 of edition 3) – Threaded parts torque test values . 118
Table 21 (20.1 of edition 3) – Rated impulse voltage for equipment energized directly
from the supply mains (from IEC 60664-1:2007, Table F.1) . 121
Table 22 (20.2 of edition 3) – Clearances for insulation co-ordination (from
IEC 60664-1:2007, Table F.2) . 122
Table 23 (20.3 of edition 3) – Minimum creepage distances for basic insulation . 126
Table 24 (20.4 of edition 3) – Minimum creepage distances for functional insulation . 127
Table 25 (21.4 of edition 3) – Mercury switch short-circuit conditions . 131
Table 26 (27.2.3 of edition 3) – Maximum winding temperature (for test of mechanical
blocked output conditions) . 136
Table B.1 – Value of X . 160
a
Table H.1 (H.11.12.7 of edition 3) – Acceptable measures to address fault/errors (1 of
6) . 190
Table H.2 – Semi-formal methods . 197
Table H.3 – Software architecture specification . 198
Table H.4 – Module design specification . 199
Table H.5 – Design and coding standards . 199
Table H.6 – Software module testing . 200
Table H.7 – Software integration testing . 201
Table H.8 – Software safety validation . 201
Table H.9 (H.11.12.6 of edition 3) – Combinations of analytical measures during
hardware development . 202
Table H.10 – Data exchange . 203
Table H.11 – Examples of defences against unauthorised access and transmission
failure modes . 204
Table H.12 (H.23 of edition 3) – Emission . 209
Table H.13 (H.26.2.1 of edition 3) – Applicable test levels . 210
Table H.14 – Voltage dips, short interruptions and voltage variations . 212
Table H.15 (H.26.5.4.2 of edition 3) – Test values for voltage variations . 213
Table H.16 (H.26.8.2 of edition 3) – Test voltages for test level 2 (depending on the
installation class conditions) . 215
Table H.17 – Test level for electrical fast transient burst test . 216
Table H.18 (H.26.10.4 of edition 3) – Peak voltages . 217
– 6 – 60730-1 © IEC:2013
Table H.19 (H.26.12.2.1 of edition 3) – Test levels for conducted disturbances on
mains and I/O lines . 219
Table H.20 (H.26.12.3.1 of edition 3) – Test level for immunity to radiated
electromagnetic fields . 220
Table H.21 – Increased test level for radiated immunity (ISM, GSM, DECT bands) . 220
Table H.22 (H.26.13.2 of edition 3) – Test level for supply frequency variations . 221
Table H.23 (H.26.14.2 of edition 3) – Test level for continuous fields . 222
Table H.24 (H.27.1 of edition 3) – Electrical/electronic component fault modes table
(1 of 3) . 227
Table J.1 – Maximum current . 238
Table J.2 (J.7, 7.2 of edition 3) – Normal operating conditions . 239
Table J.3 – Samples for the test (clause reference) . 240
Table J.4 – Electrical and thermal ratings of a thermistor . 241
Table J.5 – Additional items to Table 1 . 243
Table J.6 – Sequence of calibration and conditioning tests for PTC thermistors . 245
Table J.7 – Classes for PTC sensing thermistors . 246
Table J.8 – Sequence of calibration and conditioning tests for NTC thermistors . 247
Table J.9 – Classes for NTC sensing thermistors . 247
Table J.10 – Number of cycles for endurance test . 250
Table J.11 – Ageing test temperature . 251
Table J.12 – Number of cycles for endurance test . 252
Table K.1 – Inherent control or equivalent protective control . 254
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 . 255
Table M.1 – Typical usage . 257
Table P.1 – Environmental cycling conditions . 259
Table Q.1 – IEC 60664-3 test levels or conditions . 261
Table S.1 – Example A – Using Annex S guidance for applying Clause 20 . 270
Table S.2 – Example B – Using Annex S guidance for applying Clause 20 . 270
60730-1 © IEC:2013 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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International Standard IEC 60730-1 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This fifth edition cancels and replaces the fourth edition published in 2010. It constitutes a
technical revision. The major changes with respect to the previous edition are as follows.
– modification of the title and scope;
– revisions to Clause H.26 based on changes in technology, applications, and to improve
consistency and layout;
– modification to Table H.12 to align with CISPR 22;
– revisions to Annex J to correlate the fault modes of thermistors and to exempt thermistors
used in conjunction with type 1 controls in SELV low power circuits from the tests specified
in Annex J;
– new requirements covering battery-powered controls, and the use of batteries in controls;
– revision addressing the exclusion of relay faults;
– new/updated requirements in Clause 24, for switch mode power supplies;
– 8 – 60730-1 © IEC:2013
– revisions covering the allowance of screwless-type clamping units complying with
IEC 60999-1;
– new requirements addressing remotely actuated control functions;
– addition of a new/updated leakage current diagram to align the Annex E diagram with the
diagram in IEC 60990;
– updated requirements for temperature sensing controls.
The text of this standard is based on the following documents:
FDIS Report on voting
72/899/FDIS 72/928/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of the IEC 60730 series, under the general title: Automatic electrical controls,
can be found on the IEC website.
In the development of a fully international standard to cover automatic controls for household
and similar use, it has been necessary to take into consideration the differing requirements
resulting from practical experience in various parts of the world and to recognize the variation
in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the
following subclauses:
2.1.5 11.11.1.2 17.10.4
2.7.2 11.11.1.3 17.12.5
2.7.3 11.11.1.4 18.1.6
2.14.2 12.1.6 18.1.6.1
4.2.1 12.3 18.1.6.2
6.6.1 Table 12 (13.2.1), footnote a 18.1.6.3
Table 1 (7.2), footnote d 13.3.4 18.4
7.4.3 14.4 19.2.4.1
7.4.3.2 Table 13 (14.7.4), footnote f 19.2.5.1
8.1.1.1 15.1 21.1
8.4 16.2.1 21.4
9.3.2 17.1.3.1 27.2.3.1
9.3.4 17.2.2 Annex C
9.5.2 17.2.3 Annex D
Table 3 (10.1.4), footnote b 17.2.3.1 H.26.10
10.1.4.1 Table 14 (17.2.5) Table H.18 (H.26.10.4)
10.1.14 Table 15 (17.2.5) H.27.1.1.3
10.1.16 Table 16 (17.2.5) Table K.1, footnote b
10.1.16.1 17.5.1 Table K.2, footnote b
Table 6 (10.2.1), footnote b 17.7.7
T.3.2
11.5 17.8.4.1
Table 10 (11.8.2), footnote b 17.10
60730-1 © IEC:2013 – 9 –
It is envisaged that in the next edition of this standard it will be found possible to remove
those differences that are covered by new IEC standards now being prepared by other
technical committees.
This part 1 is to be used in conjunction with the appropriate part 2 for a particular type of
control, or for controls for particular applications. This part 1 may also be applied, so far as
reasonable, to controls not mentioned in a part 2, and to controls designed on new principles,
in which cases additional requirements may be considered to be necessary.
Where, for a particular clause or subclause, the text of part 2 indicates:
Addition: the part 1 text applies with the additional requirement indicated in a part 2;
Modification: the part 1 text applies with a minor change as indicated in a part 2;
Replacement: the part 2 text contains a change which replaces the part 1 text in its entirety.
Where no change is necessary, the part 2 indicates that the relevant clause or subclause
applies.
NOTE In this standard the following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter: in smaller roman type;
– Defined terms: bold type.
Some table titles contain reference in brackets to table numbers in IEC 60730-1, edition 3 for
ease of correlation between parts 2 and the Part 1.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this 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.
The contents of the corrigendum of September 2014 have been included in this copy.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 10 – 60730-1 © IEC:2013
AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
1 Scope and normative references
1.1 Scope
In general, this part of IEC 60730 applies to automatic electrical controls for use in, on, or in
association with equipment for household and similar use. The equipment may use electricity,
gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
NOTE 1 Throughout this standard the word "equipment" means "appliance and equipment."
EXAMPLE 1 Controls for appliances within the scope of IEC 60335.
This International Standard is applicable to controls for building automation within the scope
of ISO 16484.
This standard also applies to automatic electrical controls for equipment that may be used
by the public, such as equipment intended to be used in shops, offices, hospitals, farms and
commercial and industrial applications.
EXAMPLE 2 Controls for commercial catering, heating and air-conditioning equipment.
This standard is also applicable to individual controls utilized as part of a control system or
controls which are mechanically integral with multifunctional controls having non-electrical
outputs.
EXAMPLE 3 Independently mounted water valves, controls in smart grid systems and controls for building
automation systems within the scope of ISO 16484-2.
This standard is also applicable to relays when used as controls for IEC 60335 appliances.
Additional requirements for the safety and operating values of relays when used as controls
for IEC 60335 appliances are contained in Annex U.
NOTE 2 These requirements are referred to in the scope of IEC 61810-1.
NOTE 3 This standard is intended to be used for the testing of any stand-alone relay which is intended to be used
as a control of an appliance according to IEC 60335-1. It is not intended to be used for any other stand-alone
relay, or to replace the IEC 61810 series of standards.
This standard does not apply to automatic electrical controls intended exclusively for
industrial process applications unless explicitly mentioned in the relevant part 2 or the
equipment standard.
1.1.1 This International Standard applies to the inherent safety, to the operating values,
operating times, and operating sequences where such are associated with equipment
safety, and to the testing of automatic electrical control devices used in, or in association
with, equipment.
This standard applies to controls using thermistors, see also Annex J.
This standard is also applicable to the functional safety of low complexity safety related
systems and controls.
60730-1 © IEC:2013 – 11 –
1.1.2 This standard applies to automatic electrical controls, mechanically or electrically
operated, responsive to or controlling such characteristics as temperature, pressure, passage
of time, humidity, light, electrostatic effects, flow, or liquid level, current, voltage, acceleration,
or combinations thereof.
1.1.3 This standard applies to starting relays, which are a specific type of automatic
electrical control, intended to switch the starting winding of a motor. Such controls may be
built into, or be separate from, the motor.
1.1.4 This standard applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
1.1.5 This standard applies to a.c. or d.c. powered controls with a rated voltage not
exceeding 690 V a.c. or 600 V d.c.
1.1.6 This standard does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate household equipment
standard or as determined by the manufacturer shall apply.
1.1.7 This standard applies also to controls incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.8 This standard applies also to controls using NTC or PTC thermistors, requirements
for which are contained in Annex J.
1.2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60038, IEC standard voltages
IEC 60065:2001, Audio, video and similar electronic apparatus – Safety requirements
Amendment 1:2005
Amendment 2:2010
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60085, Electrical insulation – Thermal evaluation and designation
IEC 60099-1, Surge arresters – Part 1: Non-linear resistor type gapped arresters for a.c.
systems
IEC 60112:2003, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
Amendment 1:2009
___________
There exists a consolidated edition 7.2:2011 including IEC 60065:2001 and its Amendments 1:2005 and 2:2010.
Withdrawn.
There exists a consolidated edition 4.1:2009 including IEC 60112:2003 and its Amendment 1:2009.
– 12 – 60730-1 © IEC:2013
IEC 60127-1, Miniature fuses – Part 1: Definitions for miniature fuses and general
requirements for miniature fuse-links
IEC 60227-1, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 1: General requirements
IEC 60245-1, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 1: General requirements
IEC 60269-1, Low-voltage fuses – Part 1:General requirements
IEC 60335-1:2010, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60364 (all parts), Low-voltage electrical installations
IEC 60384-14, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification: Fixed capacitors for electromagnetic interference suppression and connection to
the supply mains
IEC 60384-16, Fixed capacitors for use in electronic equipment – Part 16: Sectional
specification: Fixed metallized polypropylene film dielectric d.c. capacitors
IEC 60384-17, Fixed capacitors for use in electronic equipment – Part 17: Sectional
specification: Fixed metallized polypropylene film dielectric a.c. and pulse capacitors
IEC 60417 (all parts), Graphical symbols for use on equipment
IEC 60423, Conduit systems for cable management – Outside diameters of conduits for
electrical i
...
IEC 60730-1 ®
Edition 5.1 2015-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
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IEC 60730-1 ®
Edition 5.1 2015-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.120 ISBN 978-2-8322-3088-6
IEC 60730-1 ®
Edition 5.1 2015-12
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
– 2 – IEC 60730-1:2013+AMD1:2015 CSV
© IEC 2015
CONTENTS
FOREWORD . 7
1 Scope and normative references . 10
2 Terms and definitions . 15
3 General requirements . 37
4 General notes on tests . 37
5 Rating. 41
6 Classification . 41
7 Information . 49
8 Protection against electric shock . 58
9 Provision for protective earthing . 61
10 Terminals and terminations . 64
11 Constructional requirements . 72
12 Moisture and dust resistance . 90
13 Electric strength and insulation resistance . 92
14 Heating . 95
15 Manufacturing deviation and drift . 101
16 Environmental stress . 102
17 Endurance . 103
18 Mechanical strength . 112
19 Threaded parts and connections . 119
20 Creepage distances, clearances and distances through solid insulation . 122
21 Resistance to heat, fire and tracking . 131
22 Resistance to corrosion . 133
23 Electromagnetic compatibility (EMC) requirements – Emission . 134
24 Components . 135
25 Normal operation . 137
26 Electromagnetic compatibility (EMC) requirements – Immunity . 137
27 Abnormal operation . 137
28 Guidance on the use of electronic disconnection . 140
Annex A (normative) Indelibility of markings . 160
Annex B (normative) Measurement of creepage distances and clearances in air . 162
Annex C (normative) Cotton used for mercury switch test (not applicable in the
countries members of CENELEC) . 167
Annex D (informative) Heat, fire and tracking . 168
Annex E (normative) Circuit for measuring leakage current . 169
Annex F (informative) Fire hazard testing . 170
Annex G (normative) Heat and fire resistance tests. 171
Annex H (normative) Requirements for electronic controls . 173
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 237
Annex K (informative) Nominal voltages of supply systems for different modes of
overvoltage control . 255
© IEC 2015
Annex L (normative) Overvoltage categories . 257
Annex M (informative) Typical usage . 258
Annex N (normative) Pollution degrees . 259
Annex P (normative) Printed circuit board coating performance test . 260
Annex Q (normative) Printed circuit board coating performance test . 262
Annex R (informative) Explanatory notes for surge immunity test . 265
Annex S (informative) Guidance for applying Clause 20 . 270
Annex T (normative) Requirements for SELV and PELV . 272
Annex U (normative) Requirements for relays when used as controls in IEC 60335
appliances . 275
Annex V (normative) Requirements for controls powered by secondary batteries
(rechargeable) . 278
Bibliography . 280
Figure 1 – Test pin . 140
Figure 2 – Standard test finger . 141
Figure 3 – Test nail . 142
Figure 4 – Impact test for free-standing controls . 143
Figure 5 – Tumbling barrel . 143
Figure 6 – Ball-pressure apparatus . 144
Figure 7 – Void . 144
Figure 8 – Apparatus for testing durability of markings on rating labels . 144
Figure 9 – Apparatus for flexing test . 145
Figure 10 – Screw terminals and stud terminals (1 of 2) . 146
Figure 11 – Pillar terminals . 148
Figure 12 – Mantle terminals . 149
Figure 13 – Saddle and lug terminals . 150
Figure 14 – Tabs . 151
Figure 15 – Tabs for non-reversible connectors . 152
Figure 16 – Receptacles . 153
Figure 17 – Measurement of creepage distance and clearance . 154
Figures 18 to 24 Void . 155
Figure 25 – Diagram for leakage current measurement at operating temperature for
single-phase connection of class II controls . 155
Figure 26 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 156
Figure 27 – Diagram for leakage current measurement at operating temperature for
three-phase connection of class II controls . 157
Figure 28 – Diagram for leakage current measurement at operating temperature for
three-phase connection of controls other than class II . 158
Figure 29 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 158
Figure 30 – Diagram for leakage current measurement at operating temperature for
two-phase connection of controls to three-wire, ground neutral supply other than
class II . 159
Figure B.1 – Narrow groove . 163
– 4 – IEC 60730-1:2013+AMD1:2015 CSV
© IEC 2015
Figure B.2 – Wide groove . 163
Figure B.3 – V-shaped groove . 163
Figure B.4 – Rib . 164
Figure B.5 – Uncemented joint with narrow groove . 164
Figure B.6 – Uncemented joint with wide groove . 164
Figure B.7 – Uncemented joint with narrow and wide grooves . 165
Figure B.8 – Diverging side walls . 165
Figure B.9 – Narrow recess . 166
Figure B.10 – Wide recess . 166
Figure B.11 – Conductive floating part . 166
Figure E.1 – Circuit for measuring leakage currents . 169
Figure H.1 – V-Model for the software life cycle . 199
Figure H.2 – Voltage variation test . 215
Figure H.3 – Ring wave characteristics (open-circuit voltage) . 220
Figure H.4 – Schematic of a ring wave generator 0,5 µs /100 kHz . 220
Figure H.5 – Example of an electronic circuit with low power points . 225
Figure J.1 – Test circuit for inrush-current limiting thermistor endurance test . 253
Figure P.1 – Test sample . 261
Figure Q.1 – Test sample . 263
Figure Q.2 – Examples of land configurations (see also Figure Q.1) . 264
Figure R.1 – Example of surge protection by shielding in buildings with common earth
reference systems . 268
Figure R.2 – Example of secondary surge protection in buildings with separate
common earth reference systems . 268
Figure R.3 – Example of primary and secondary surge protection of indoor/outdoor
equipment . 269
Figure S.1 – Guidance flowchart for application of requirements of Clause 20 . 270
Table 1 (7.2 of edition 3) – Required information and methods of providing information
(1 of 4) . 52
Table 2 (9.3.2 of edition 3) – Quick connect terminal dimensions (Canada and USA) . 63
Table 3 (10.1.4 of edition 3) – Minimum cross-sectional area of conductors . 65
Table 4 (10.1.8 of edition 3) – Terminal conductors . 67
Table 5 (10.1.9 of edition 3) – Conductor pull test values . 68
Table 6 (10.2.1 of edition 3) – Nominal cross-sectional areas of conductors . 70
Table 7 (10.2.4.2 of edition 3) – Material and plating for tabs . 71
Table 8 (10.2.4.3 of edition 3) – Axial force values for tab insertion and withdrawal . 71
Table 9 (11.7.2 of edition 3) – Pull and torque values . 82
Table 10 (11.8.2 of edition 3) – Minimum cord conductor sizes . 83
Table 11 (13.1 of edition 3) – Minimum insulation resistance . 93
a
Table 12 (13.2 of edition 3) – Insulation or disconnection test voltages (1 of 2) . 93
Table 13 (14.1 of edition 3) – Maximum heating temperatures (1 of 3) . 98
Table 14 (17.2.1 of edition 3) – Electrical conditions for the overvoltage test (this table
applies in all countries except Canada, and the USA) . 105
© IEC 2015
Table 15 (17.2.2 of edition 3) – 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) . 106
Table 16 (17.2.3 of edition 3) – 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) . 107
Table 17 (18.4.1 of edition 3) – Minimum thickness of sheet metal for enclosures made
of carbon steel or stainless steel . 115
Table 18 (18.4.2 of edition 3) – Minimum thickness of sheet metal for enclosures of
aluminium, copper or brass . 116
Table 19 (18.7 of edition 3) – Pull-cord force test values . 118
Table 20 (19.1 of edition 3) – Threaded parts torque test values . 120
Table 21 (20.1 of edition 3) – Rated impulse voltage for equipment energized directly
from the supply mains (from IEC 60664-1:2007, Table F.1) . 123
Table 22 (20.2 of edition 3) – Clearances for insulation co-ordination (from
IEC 60664-1:2007, Table F.2) . 124
Table 23 (20.3 of edition 3) – Minimum creepage distances for basic insulation . 128
Table 24 (20.4 of edition 3) – Minimum creepage distances for functional insulation . 129
Table 25 (21.4 of edition 3) – Mercury switch short-circuit conditions . 133
Table 26 (27.2.3 of edition 3) – Maximum winding temperature (for test of mechanical
blocked output conditions) . 138
Table B.1 – Value of X . 162
a
Table H.1 (H.11.12.7 of edition 3) – Acceptable measures to address fault/errors
(1 of 6) . 192
Table H.2 – Semi-formal methods . 199
Table H.3 – Software architecture specification . 200
Table H.4 – Module design specification . 201
Table H.5 – Design and coding standards . 201
Table H.6 – Software module testing . 202
Table H.7 – Software integration testing . 203
Table H.8 – Software safety validation . 203
Table H.9 (H.11.12.6 of edition 3) – Combinations of analytical measures during
hardware development . 204
Table H.10 – Data exchange . 205
Table H.11 – Examples of defences against unauthorised access and transmission
failure modes . 206
Table H.12 (H.23 of edition 3) – Emission . 211
Table H.13 (H.26.2.1 of edition 3) – Applicable test levels . 212
Table H.14 – Voltage dips, short interruptions and voltage variations . 214
Table H.15 (H.26.5.4.2 of edition 3) – Test values for voltage variations . 215
Table H.16 (H.26.8.2 of edition 3) – Test voltages for test level 2 (depending on the
installation class conditions) . 217
Table H.17 – Test level for electrical fast transient burst test . 218
Table H.18 (H.26.10.4 of edition 3) – Peak voltages . 219
Table H.19 (H.26.12.2.1 of edition 3) – Test levels for conducted disturbances on
mains and I/O lines . 221
Table H.20 (H.26.12.3.1 of edition 3) – Test level for immunity to radiated
electromagnetic fields . 222
– 6 – IEC 60730-1:2013+AMD1:2015 CSV
© IEC 2015
Table H.21 – Increased test level for radiated immunity (ISM, GSM, DECT bands) . 222
Table H.22 (H.26.13.2 of edition 3) – Test level for supply frequency variations . 223
Table H.23 (H.26.14.2 of edition 3) – Test level for continuous fields . 224
Table H.24 (H.27.1 of edition 3) – Electrical/electronic component fault modes table
(1 of 3) . 228
Table J.1 – Maximum current . 239
Table J.2 (J.7, 7.2 of edition 3) – Normal operating conditions . 240
Table J.3 – Samples for the test (clause reference) . 241
Table J.4 – Electrical and thermal ratings of a thermistor . 242
Table J.5 – Additional items to Table 1 . 244
Table J.6 – Sequence of calibration and conditioning tests for PTC thermistors . 246
Table J.7 – Classes for PTC sensing thermistors . 247
Table J.8 – Sequence of calibration and conditioning tests for NTC thermistors . 248
Table J.9 – Classes for NTC sensing thermistors . 248
Table J.10 – Number of cycles for endurance test . 251
Table J.11 – Ageing test temperature . 252
Table J.12 – Number of cycles for endurance test . 253
Table K.1 – Inherent control or equivalent protective control . 255
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 . 256
Table M.1 – Typical usage . 258
Table P.1 – Environmental cycling conditions . 260
Table Q.1 – IEC 60664-3 test levels or conditions . 262
Table S.1 – Example A – Using Annex S guidance for applying Clause 20 . 271
Table S.2 – Example B – Using Annex S guidance for applying Clause 20 . 271
© IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
FOREWORD
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared for
user convenience.
IEC 60730-1 edition 5.1 contains the fifth edition (2013-11) [documents 72/899/FDIS and 72/928/
RVD] and its corrigendum 1 (september 2014), and its amendment 1 (2015-12) [documents
72/1017/FDIS and 72/1026/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text. A
separate Final version with all changes accepted is available in this publication.
– 8 – IEC 60730-1:2013+AMD1:2015 CSV
© IEC 2015
International Standard IEC 60730-1 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This edition constitutes a technical revision. The major changes with respect to the previous
edition are as follows.
– modification of the title and scope;
– revisions to Clause H.26 based on changes in technology, applications, and to improve
consistency and layout;
– modification to Table H.12 to align with CISPR 22;
– revisions to Annex J to correlate the fault modes of thermistors and to exempt thermistors
used in conjunction with type 1 controls in SELV low power circuits from the tests specified
in Annex J;
– new requirements covering battery-powered controls, and the use of batteries in controls;
– revision addressing the exclusion of relay faults;
– new/updated requirements in Clause 24, for switch mode power supplies;
– revisions covering the allowance of screwless-type clamping units complying with
IEC 60999-1;
– new requirements addressing remotely actuated control functions;
– addition of a new/updated leakage current diagram to align the Annex E diagram with the
diagram in IEC 60990;
– updated requirements for temperature sensing controls.
A list of all parts of the IEC 60730 series, under the general title: Automatic electrical controls,
can be found on the IEC website.
In the development of a fully international standard to cover automatic controls for household
and similar use, it has been necessary to take into consideration the differing requirements
resulting from practical experience in various parts of the world and to recognize the variation
in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the
following subclauses:
2.1.5 11.11.1.2 17.10.4
2.7.2 11.11.1.3 17.12.5
2.7.3 11.11.1.4 18.1.6
2.14.2 12.1.6 18.1.6.1
4.2.1 12.3 18.1.6.2
6.6.1 Table 12 (13.2.1), footnote a 18.1.6.3
Table 1 (7.2), footnote d 13.3.4 18.4
7.4.3 14.4 19.2.4.1
7.4.3.2 Table 13 (14.7.4), footnote f 19.2.5.1
8.1.1.1 15.1 21.1
8.4 16.2.1 21.4
9.3.2 17.1.3.1 27.2.3.1
9.3.4 17.2.2 Annex C
9.5.2 17.2.3 Annex D
Table 3 (10.1.4), footnote b 17.2.3.1 H.26.10
10.1.4.1 Table 14 (17.2.5) Table H.18 (H.26.10.4)
10.1.14 Table 15 (17.2.5) H.27.1.1.3
10.1.16 Table 16 (17.2.5) Table K.1, footnote b
10.1.16.1 17.5.1 Table K.2, footnote b
© IEC 2015
Table 6 (10.2.1), footnote b 17.7.7
T.3.2
11.5 17.8.4.1
Table 10 (11.8.2), footnote b 17.10
It is envisaged that in the next edition of this standard it will be found possible to remove
those differences that are covered by new IEC standards now being prepared by other
technical committees.
This part 1 is to be used in conjunction with the appropriate part 2 for a particular type of
control, or for controls for particular applications. This part 1 may also be applied, so far as
reasonable, to controls not mentioned in a part 2, and to controls designed on new principles,
in which cases additional requirements may be considered to be necessary.
Where, for a particular clause or subclause, the text of part 2 indicates:
Addition: the part 1 text applies with the additional requirement indicated in a part 2;
Modification: the part 1 text applies with a minor change as indicated in a part 2;
Replacement: the part 2 text contains a change which replaces the part 1 text in its entirety.
Where no change is necessary, the part 2 indicates that the relevant clause or subclause
applies.
NOTE In this standard the following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter: in smaller roman type;
– Defined terms: bold type.
Some table titles contain reference in brackets to table numbers in IEC 60730-1, edition 3 for
ease of correlation between parts 2 and the Part 1.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of the base publication and its amendment 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 10 – IEC 60730-1:2013+AMD1:2015 CSV
© IEC 2015
AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
1 Scope and normative references
1.1 Scope
In general, this part of IEC 60730 applies to automatic electrical controls for use in, on, or in
association with equipment for household and similar use. The equipment may use electricity,
gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
NOTE 1 Throughout this standard the word "equipment" means "appliance and equipment."
EXAMPLE 1 Controls for appliances within the scope of IEC 60335.
This International Standard is applicable to controls for building automation within the scope
of ISO 16484.
This standard also applies to automatic electrical controls for equipment that may be used
by the public, such as equipment intended to be used in shops, offices, hospitals, farms and
commercial and industrial applications.
EXAMPLE 2 Controls for commercial catering, heating and air-conditioning equipment.
This standard is also applicable to individual controls utilized as part of a control system or
controls which are mechanically integral with multifunctional controls having non-electrical
outputs.
EXAMPLE 3 Independently mounted water valves, controls in smart grid systems and controls for building
automation systems within the scope of ISO 16484-2.
This standard is also applicable to relays when used as controls for IEC 60335 appliances.
Additional requirements for the safety and operating values of relays when used as controls
for IEC 60335 appliances are contained in Annex U.
NOTE 2 These requirements are referred to in the scope of IEC 61810-1.
NOTE 3 This standard is intended to be used for the testing of any stand-alone relay which is intended to be used
as a control of an appliance according to IEC 60335-1. It is not intended to be used for any other stand-alone
relay, or to replace the IEC 61810 series of standards.
This standard does not apply to automatic electrical controls intended exclusively for
industrial process applications unless explicitly mentioned in the relevant part 2 or the
equipment standard.
This standard applies to controls powered by primary or secondary batteries, requirements
for which are contained within the standard, including Annex V.
1.1.1 This International Standard applies to the inherent safety, to the operating values,
operating times, and operating sequences where such are associated with equipment
safety, and to the testing of automatic electrical control devices used in, or in association
with, equipment.
This standard applies to controls using thermistors, see also Annex J.
© IEC 2015
This standard is also applicable to the functional safety of low complexity safety related
systems and controls.
1.1.2 This standard applies to automatic electrical controls, mechanically or electrically
operated, responsive to or controlling such characteristics as temperature, pressure, passage
of time, humidity, light, electrostatic effects, flow, or liquid level, current, voltage, acceleration,
or combinations thereof.
1.1.3 This standard applies to starting relays, which are a specific type of automatic
electrical control, intended to switch the starting winding of a motor. Such controls may be
built into, or be separate from, the motor.
1.1.4 This standard applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
1.1.5 This standard applies to a.c. or d.c. powered controls with a rated voltage not
exceeding 690 V a.c. or 600 V d.c.
1.1.6 This standard does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate household equipment
standard or as determined by the manufacturer shall apply.
1.1.7 This standard applies also to controls incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.8 This standard applies also to controls using NTC or PTC thermistors, requirements
for which are contained in Annex J.
1.1.9 This standard applies to the electrical and functional safety of controls capable of
receiving and responding to communications signals, including signals for power billing rate
and demand response.
The signal
...
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Edition 5.2 2020-04
CONSOLIDATED VERSION
INTERNATIONAL
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Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
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IEC 60730-1 ®
Edition 5.2 2020-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 97.120 ISBN 978-2-8322-8155-0
IEC 60730-1 ®
Edition 5.2 2020-04
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Automatic electrical controls –
Part 1: General requirements
Dispositifs de commande électrique automatiques –
Partie 1: Exigences générales
– 2 – IEC 60730-1:2013+AMD1:2015
+AMD2:2020 CSV © IEC 2020
CONTENTS
FOREWORD . 7
1 Scope and normative references . 10
2 Terms and definitions . 15
3 General requirements . 38
4 General notes on tests . 38
5 Rating. 42
6 Classification . 42
7 Information . 49
8 Protection against electric shock . 58
9 Provision for protective earthing . 62
10 Terminals and terminations . 64
11 Constructional requirements . 73
12 Moisture and dust resistance . 91
13 Electric strength and insulation resistance . 93
14 Heating . 96
15 Manufacturing deviation and drift . 102
16 Environmental stress . 103
17 Endurance . 104
18 Mechanical strength . 114
19 Threaded parts and connections . 121
20 Creepage distances, clearances and distances through solid insulation . 124
21 Resistance to heat, fire and tracking . 133
22 Resistance to corrosion . 135
23 Electromagnetic compatibility (EMC) requirements – Emission . 136
24 Components . 137
25 Normal operation . 139
26 Electromagnetic compatibility (EMC) requirements – Immunity . 139
27 Abnormal operation . 139
28 Guidance on the use of electronic disconnection . 142
Annex A (normative) Indelibility of markings . 162
Annex B (normative) Measurement of creepage distances and clearances in air . 164
Annex C (normative) Cotton used for mercury switch test (not applicable in the
countries members of CENELEC) . 169
Annex D (informative) Heat, fire and tracking . 170
Annex E (normative) Circuit for measuring leakage current . 171
Annex F (informative) Fire hazard testing . 172
Annex G (normative) Heat and fire resistance tests. 173
Annex H (normative) Requirements for electronic controls . 175
Annex J (normative) Requirements for thermistor elements and controls using
thermistors . 241
Annex K (informative) Nominal voltages of supply systems for different modes of
overvoltage control . 259
+AMD2:2020 CSV © IEC 2020
Annex L (normative) Overvoltage categories . 261
Annex M (informative) Typical usage . 262
Annex N (normative) Pollution degrees . 263
Annex P (normative) Printed circuit board coating performance test . 264
Annex Q (normative) Printed circuit board coating performance test . 266
Annex R (informative) Explanatory notes for surge immunity test . 272
Annex S (informative) Guidance for applying Clause 20 . 277
Annex T (normative) Requirements for SELV and PELV . 279
Annex U (normative) Requirements for relays when used as controls in IEC 60335
appliances . 282
Annex V (normative) Requirements for controls powered by secondary batteries
(rechargeable) . 285
Bibliography . 287
Figure 1 – Test pin . 142
Figure 2 – Standard test finger . 143
Figure 3 – Test nail . 144
Figure 4 – Impact test for free-standing controls . 145
Figure 5 – Tumbling barrel . 145
Figure 6 – Ball-pressure apparatus . 146
Figure 7 – Void . 146
Figure 8 – Apparatus for testing durability of markings on rating labels . 146
Figure 9 – Apparatus for flexing test . 147
Figure 10 – Screw terminals and stud terminals . 148
Figure 11 – Pillar terminals . 150
Figure 12 – Mantle terminals . 151
Figure 13 – Saddle and lug terminals . 152
Figure 14 – Tabs . 153
Figure 15 – Tabs for non-reversible connectors . 154
Figure 16 – Receptacles . 155
Figure 17 – Measurement of creepage distance and clearance . 156
Figures 18 to 24 Void . 157
Figure 25 – Diagram for leakage current measurement at operating temperature for
single-phase connection of class II controls . 157
Figure 26 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 158
Figure 27 – Diagram for leakage current measurement at operating temperature for
three-phase connection of class II controls . 159
Figure 28 – Diagram for leakage current measurement at operating temperature for
three-phase connection of controls other than class II . 160
Figure 29 – Diagram for leakage current measurement at operating temperature for
single-phase connection of controls other than class II . 160
Figure 30 – Diagram for leakage current measurement at operating temperature for
two-phase connection of controls to three-wire, ground neutral supply other
than class II . 161
Figure B.1 – Narrow groove . 165
– 4 – IEC 60730-1:2013+AMD1:2015
+AMD2:2020 CSV © IEC 2020
Figure B.2 – Wide groove . 165
Figure B.3 – V-shaped groove . 165
Figure B.4 – Rib . 166
Figure B.5 – Uncemented joint with narrow groove . 166
Figure B.6 – Uncemented joint with wide groove . 166
Figure B.7 – Uncemented joint with narrow and wide grooves . 167
Figure B.8 – Diverging side walls . 167
Figure B.9 – Narrow recess . 168
Figure B.10 – Wide recess . 168
Figure B.11 – Conductive floating part . 168
Figure E.1 – Circuit for measuring leakage currents . 171
Figure H.1 – V-Model for the software life cycle . 201
Figure H.2 – Voltage variation test . 218
Figure H.3 – Ring wave characteristics (open-circuit voltage) . 223
Figure H.4 – Schematic of a ring wave generator 0,5 µs /100 kHz . 223
Figure H.5 – Example of an electronic circuit with low power points . 228
Figure J.1 – Test circuit for inrush-current limiting thermistor endurance test . 257
Figure P.1 – Test sample . 265
Figure Q.1 – Test sample .
Figure Q.2 – Examples of land configurations (see also Figure Q.1) .
Figure Q.1 – Example of type 1 protection . 270
Figure Q.2 – Example of type 2 protection . 271
Figure R.1 – Example of surge protection by shielding in buildings with common earth
reference systems . 275
Figure R.2 – Example of secondary surge protection in buildings with separate
common earth reference systems . 275
Figure R.3 – Example of primary and secondary surge protection of indoor/outdoor
equipment . 276
Figure S.1 – Guidance flowchart for application of requirements of Clause 20 . 277
Table 1 (7.2 of edition 3) – Required information and methods of providing
information) . 52
Table 2 (9.3.2 of edition 3) – Quick connect terminal dimensions (Canada and USA) . 63
Table 3 (10.1.4 of edition 3) – Minimum cross-sectional area of conductors . 66
Table 4 (10.1.8 of edition 3) – Terminal conductors . 68
Table 5 (10.1.9 of edition 3) – Conductor pull test values . 69
Table 6 (10.2.1 of edition 3) – Nominal cross-sectional areas of conductors . 71
Table 7 (10.2.4.2 of edition 3) – Material and plating for tabs . 72
Table 8 (10.2.4.3 of edition 3) – Axial force values for tab insertion and withdrawal . 72
Table 9 (11.7.2 of edition 3) – Pull and torque values . 83
Table 10 (11.8.2 of edition 3) – Minimum cord conductor sizes . 84
Table 11 (13.1 of edition 3) – Minimum insulation resistance . 94
a
Table 12 (13.2 of edition 3) – Insulation or disconnection test voltages . 94
Table 13 (14.1 of edition 3) – Maximum heating temperatures . 99
+AMD2:2020 CSV © IEC 2020
Table 14 (17.2.1 of edition 3) – Electrical conditions for the overvoltage test (this table
applies in all countries except Canada, and the USA) . 106
Table 15 (17.2.2 of edition 3) – 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) . 107
Table 16 (17.2.3 of edition 3) – Electrical conditions for the overload endurance 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) . 109
Table 17 (18.4.1 of edition 3) – Minimum thickness of sheet metal for enclosures made
of carbon steel or stainless steel . 117
Table 18 (18.4.2 of edition 3) – Minimum thickness of sheet metal for enclosures of
aluminium, copper or brass . 118
Table 19 (18.7 of edition 3) – Pull-cord force test values . 120
Table 20 (19.1 of edition 3) – Threaded parts torque test values . 122
Table 21 (20.1 of edition 3) – Rated impulse voltage for equipment energized directly
from the supply mains (from IEC 60664-1:2007, Table F.1) . 125
Table 22 (20.2 of edition 3) – Clearances for insulation co-ordination (from
IEC 60664-1:2007, Table F.2) . 126
Table 23 (20.3 of edition 3) – Minimum creepage distances for basic insulation . 130
Table 24 (20.4 of edition 3) – Minimum creepage distances for functional insulation . 131
Table 25 (21.4 of edition 3) – Mercury switch short-circuit conditions . 135
Table 26 (27.2.3 of edition 3) – Maximum winding temperature (for test of mechanical
blocked output conditions) . 140
Table B.1 – Value of X . 164
a
Table H.1 (H.11.12.7 of edition 3) – Acceptable measures to address fault/errors . 194
Table H.2 – Semi-formal methods . 201
Table H.3 – Software architecture specification . 202
Table H.4 – Module design specification . 203
Table H.5 – Design and coding standards . 203
Table H.6 – Software module testing . 204
Table H.7 – Software integration testing . 205
Table H.8 – Software safety validation . 205
Table H.9 (H.11.12.6 of edition 3) – Combinations of analytical measures during
hardware development . 206
Table H.10 – Data exchange . 207
Table H.11 – Examples of defences against unauthorised access and transmission
failure modes . 208
Table H.12 (H.23 of edition 3) – Emission . 214
Table H.13 (H.26.2.1 of edition 3) – Applicable test levels . 215
Table H.14 – Voltage dips, short interruptions and voltage variations . 217
Table H.15 (H.26.5.4.2 of edition 3) – Test values for voltage variations . 218
Table H.16 (H.26.8.2 of edition 3) – Test voltages for test level 2 (depending on the
installation class conditions) . 220
Table H.17 – Test level for electrical fast transient burst test . 221
Table H.18 (H.26.10.4 of edition 3) – Peak voltages . 222
Table H.19 (H.26.12.2.1 of edition 3) – Test levels for conducted disturbances on
mains and I/O lines . 224
– 6 – IEC 60730-1:2013+AMD1:2015
+AMD2:2020 CSV © IEC 2020
Table H.20 (H.26.12.3.1 of edition 3) – Test level for immunity to radiated
electromagnetic fields . 225
Table H.21 – Increased test level for radiated immunity (ISM, GSM, DECT bands) . 225
Table H.22 (H.26.13.2 of edition 3) – Test level for supply frequency variations . 226
Table H.23 (H.26.14.2 of edition 3) – Test level for continuous fields . 227
Table H.24 (H.27.1 of edition 3) – Electrical/electronic component fault modes table . 231
Table J.1 – Maximum current . 243
Table J.2 (J.7, 7.2 of edition 3) – Normal operating conditions . 244
Table J.3 – Samples for the test (clause reference) . 245
Table J.4 – Electrical and thermal ratings of a thermistor . 246
Table J.5 – Additional items to Table 1 . 248
Table J.6 – Sequence of calibration and conditioning tests for PTC thermistors . 250
Table J.7 – Classes for PTC sensing thermistors . 251
Table J.8 – Sequence of calibration and conditioning tests for NTC thermistors . 252
Table J.9 – Classes for NTC sensing thermistors . 252
Table J.10 – Number of cycles for endurance test . 255
Table J.11 – Ageing test temperature . 256
Table J.12 – Number of cycles for endurance test . 257
Table K.1 – Inherent control or equivalent protective control . 259
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 . 260
Table M.1 – Typical usage . 262
Table P.1 – Environmental cycling conditions . 264
Table Q.1 – IEC 60664-3 test levels or conditions . 267
Table S.1 – Example A – Using Annex S guidance for applying Clause 20 . 278
Table S.2 – Example B – Using Annex S guidance for applying Clause 20 . 278
+AMD2:2020 CSV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60730-1 edition 5.2 contains the fifth edition (2013-11) [documents 72/899/FDIS and
72/928/RVD] and its corrigendum 1 (2014-09), its amendment 1 (2015-12) [documents
72/1017/FDIS and 72/1026/RVD] and its amendment 2 (2020-04) [documents 72/1226/FDIS
and 72/1237/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
– 8 – IEC 60730-1:2013+AMD1:2015
+AMD2:2020 CSV © IEC 2020
International Standard IEC 60730-1 has been prepared by IEC technical committee 72:
Automatic electrical controls.
This edition constitutes a technical revision. The major changes with respect to the previous
edition are as follows.
– modification of the title and scope;
– revisions to Clause H.26 based on changes in technology, applications, and to improve
consistency and layout;
– modification to Table H.12 to align with CISPR 22;
– revisions to Annex J to correlate the fault modes of thermistors and to exempt thermistors
used in conjunction with type 1 controls in SELV low power circuits from the tests specified
in Annex J;
– new requirements covering battery-powered controls, and the use of batteries in controls;
– revision addressing the exclusion of relay faults;
– new/updated requirements in Clause 24, for switch mode power supplies;
– revisions covering the allowance of screwless-type clamping units complying with
IEC 60999-1;
– new requirements addressing remotely actuated control functions;
– addition of a new/updated leakage current diagram to align the Annex E diagram with the
diagram in IEC 60990;
– updated requirements for temperature sensing controls.
A list of all parts of the IEC 60730 series, under the general title: Automatic electrical controls,
can be found on the IEC website.
In the development of a fully international standard to cover automatic controls for household
and similar use, it has been necessary to take into consideration the differing requirements
resulting from practical experience in various parts of the world and to recognize the variation
in national electrical systems and wiring rules.
The “in some countries” notes regarding differing national practices are contained in the
following subclauses:
2.1.5 11.11.1.2 17.10.4
2.7.2 11.11.1.3 17.12.5
2.7.3 11.11.1.4 18.1.6
2.14.2 12.1.6 18.1.6.1
4.2.1 12.3 18.1.6.2
6.6.1 Table 12 (13.2.1), footnote a 18.1.6.3
Table 1 (7.2), footnote d 13.3.4 18.4
7.4.3 14.4 19.2.4.1
7.4.3.2 Table 13 (14.7.4), footnote f 19.2.5.1
8.1.1.1 15.1 21.1
8.4 16.2.1 21.4
9.3.2 17.1.3.1 27.2.3.1
9.3.4 17.2.2 Annex C
9.5.2 17.2.3 Annex D
Table 3 (10.1.4), footnote b 17.2.3.1 H.26.10
10.1.4.1 Table 14 (17.2.5) Table H.18 (H.26.10.4)
10.1.14 Table 15 (17.2.5) H.27.1.1.3
10.1.16 Table 16 (17.2.5) Table K.1, footnote b
10.1.16.1 17.5.1 Table K.2, footnote b
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Table 6 (10.2.1), footnote b 17.7.7
T.3.2
11.5 17.8.4.1
Table 10 (11.8.2), footnote b 17.10
It is envisaged that in the next edition of this standard it will be found possible to remove
those differences that are covered by new IEC standards now being prepared by other
technical committees.
This part 1 is to be used in conjunction with the appropriate part 2 for a particular type of
control, or for controls for particular applications. This part 1 may also be applied, so far as
reasonable, to controls not mentioned in a part 2, and to controls designed on new principles,
in which cases additional requirements may be considered to be necessary.
Where, for a particular clause or subclause, the text of part 2 indicates:
Addition: the part 1 text applies with the additional requirement indicated in a part 2;
Modification: the part 1 text applies with a minor change as indicated in a part 2;
Replacement: the part 2 text contains a change which replaces the part 1 text in its entirety.
Where no change is necessary, the part 2 indicates that the relevant clause or subclause
applies.
NOTE In this standard the following print types are used:
– Requirements proper: in roman type;
– Test specifications: in italic type;
– Explanatory matter: in smaller roman type;
– Defined terms: bold type.
Some table titles contain reference in brackets to table numbers in IEC 60730-1, edition 3 for
ease of correlation between parts 2 and the Part 1.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of the base publication and its amendments 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 10 – IEC 60730-1:2013+AMD1:2015
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AUTOMATIC ELECTRICAL CONTROLS –
Part 1: General requirements
1 Scope and normative references
1.1 Scope
In general, this part of IEC 60730 applies to automatic electrical controls for use in, on, or in
association with equipment for household and similar use. The equipment may use electricity,
gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof.
NOTE 1 Throughout this standard the word "equipment" means "appliance and equipment."
EXAMPLE 1 Controls for appliances within the scope of IEC 60335.
This International Standard is applicable to controls for building automation within the scope
of ISO 16484.
This standard also applies to automatic electrical controls for equipment that may be used
by the public, such as equipment intended to be used in shops, offices, hospitals, farms and
commercial and industrial applications.
EXAMPLE 2 Controls for commercial catering, heating and air-conditioning equipment.
This standard is also applicable to individual controls utilized as part of a control system or
controls which are mechanically integral with multifunctional controls having non-electrical
outputs.
EXAMPLE 3 Independently mounted water valves, controls in smart grid systems and controls for building
automation systems within the scope of ISO 16484-2.
This standard is also applicable to relays when used as controls for IEC 60335 appliances.
Additional requirements for the safety and operating values of relays when used as controls
for IEC 60335 appliances are contained in Annex U.
NOTE 2 These requirements are referred to in the scope of IEC 61810-1.
NOTE 3 This standard is intended to be used for the testing of any stand-alone relay which is intended to be used
as a control of an appliance according to IEC 60335-1. It is not intended to be used for any other stand-alone
relay, or to replace the IEC 61810 series of standards.
This standard does not apply to automatic electrical controls intended exclusively for
industrial process applications unless explicitly mentioned in the relevant part 2 or the
equipment standard.
This standard applies to controls powered by primary or secondary batteries, requirements
for which are contained within the standard, including Annex V.
1.1.1 This International Standard applies to the inherent safety, to the operating values,
operating times, and operating sequences where such are associated with equipment
safety, and to the testing of automatic electrical control devices used in, or in association
with, equipment.
This standard applies to controls using thermistors, see also Annex J.
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This standard is also applicable to the functional safety of low complexity safety related
systems and controls.
1.1.2 This standard applies to automatic electrical controls, mechanically or electrically
operated, responsive to or controlling such characteristics as temperature, pressure, passage
of time, humidity, light, electrostatic effects, flow, or liquid level, current, voltage, acceleration,
or combinations thereof.
1.1.3 This standard applies to starting relays, which are a specific type of automatic
electrical control, intended to switch the starting winding of a motor. Such controls may be
built into, or be separate from, the motor.
1.1.4 This standard applies to manual controls when such are electrically and/or
mechanically integral with automatic controls.
NOTE Requirements for manual switches not forming part of an automatic control are contained in IEC 61058-1.
1.1.5 This standard applies to a.c. or d.c. powered controls with a rated voltage not
exceeding 690 V a.c. or 600 V d.c.
1.1.6 This standard does not take into account the response value of an automatic action
of a control, if such a response value is dependent upon the method of mounting the
control in the equipment. Where a response value is of significant purpose for the protection
of the user, or surroundings, the value defined in the appropriate household equipment
standard or as determined by the manufacturer shall apply.
1.1.7 This standard applies also to controls incorporating electronic devices, requirements
for which are contained in Annex H.
1.1.8 This standard applies also to controls using NTC or PTC thermistors, requirements
for which are contained in Annex J.
1.1.9 This standard applies to the electrical and functional safety of controls capable of
receiving and responding to communications signals, including signals for power billing rate
and demand response.
The signals may be transmitted to or received from external units being part of the control
(wired), or to and from external units which are not part of the control (wireless) under test.
1.1.10 This standard does not address the integrity of the output signal to the network
devices, such as interoperability with other devices unless it has been evaluated as par
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