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IEC 60320-1
Edition 4.0 2021-07
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Appliance couplers for household and similar general purposes –
Part 1: General requirements
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IEC 60320-1
Edition 4.0 2021-07
COMMENTED VERSION
INTERNATIONAL
STANDARD
colour
inside
Appliance couplers for household and similar general purposes –
Part 1: General requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.30 ISBN 978-2-8322-4048-9
– 2 – IEC 60320-1:2021 CMV © IEC 2021
CONTENTS
FOREWORD .7
1 Scope .9
2 Normative references .9
3 Terms and definitions . 10
4 General requirements . 14
5 General notes on tests . 14
5.1 General . 14
5.2 Test samples . 14
5.3 Failures .
5.3 Routine tests . 15
6 Standard ratings . 15
7 Classification of appliance couplers . 15
8 Marking . 16
8.1 General . 16
8.2 Additional markings . 16
8.3 Appliance couplers for class II equipment . 16
8.4 Symbols or alphanumeric notations . 16
8.5 Legibility of markings . 17
8.6 Terminal markings and wiring instructions . 17
8.7 Durability . 17
8.8 Test and inspection . 17
9 Dimensions and compatibility . 18
9.1 General . 18
9.2 Single‐pole connections . 18
9.3 Compatibility . 18
9.4 Dimensions for standardized appliance couplers . 18
9.5 Dimensions for non-standardized appliance couplers . 18
10 Protection against electric shock . 19
10.1 Accessibility of live parts . 19
10.2 Protection against single pole connection . 19
10.3 Protection against access to live parts . 19
10.4 External parts . 20
10.5 Shrouds . 20
11 Provision for earthing . 20
12 Terminals and terminations . 20
12.1 General . 20
12.2 Rewirable appliance couplers . 20
12.3 Non‐rewirable appliance couplers. 20
13 Construction . 21
13.1 Risk of accidental contact . 21
13.2 Contact positions . 21
13.3 Parts covering live parts . 21
13.4 Pin construction . 21
13.4.1 Prevention of rotation . 21
13.4.2 Pin retention . 21
13.4.3 Non‐solid pins . 22
13.4.4 Pins for appliance couplers for higher ambient temperatures up to +90 °C. 23
13.5 Contact pressure . 23
13.6 Enclosure . 23
13.6.1 General . 23
13.6.2 Rewirable connectors and rewirable plug connectors . 24
13.6.3 Non-rewirable connectors and non-rewirable plug connectors . 24
13.7 Earth connection . 24
13.8 Location of terminals and terminations . 25
13.8.1 General . 25
13.8.2 Free wire test for rewirable accessories . 25
13.8.3 Free wire test for non-rewirable non-moulded-on accessories . 25
13.8.4 Free wire verification for non-rewirable moulded-on accessories . 26
13.9 Connectors/plug connectors without earthing contact . 26
13.10 Fuses, relays, thermostats, thermal cut-outs and switches . 26
14 Moisture resistance . 26
15 Insulation resistance and electric strength . 27
15.1 General . 27
15.2 Insulation resistance . 28
15.3 Dielectric strength. 29
16 Forces necessary to insert and to withdraw the connector/appliance outlet . 30
16.1 General . 30
16.2 Verification of the maximum withdrawal force . 30
16.3 Verification of the minimum withdrawal force . 32
17 Operation of contacts . 33
18 Resistance to heating of appliance couplers for hot conditions or very hot conditions . 33
18.1 General . 33
18.2 Heating test for connectors/plug connectors . 33
18.3 Heating test for appliance inlets/appliance outlets . 34
19 Breaking capacity. 35
20 Normal operation . 36
21 Temperature rise. 37
22 Cords and their connection . 38
22.1 Cords for non-rewirable connectors/plug connectors . 38
22.2 Cord anchorage . 39
22.2.1 General . 39
22.2.2 Additional requirements for rewirable connectors and rewirable plug
connectors . 40
22.2.3 Pull test for cable anchorage. 40
22.3 Flexing test . 42
23 Mechanical strength . 44
23.1 General . 44
23.2 Free fall test . 45
23.3 Lateral pull test for contacts . 45
23.4 Impact test . 48
23.5 Deformation test . 48
23.6 Torque and Pull tests for connectors/plug connectors with a separate front part . 49
23.6.1 General . 49
– 4 – IEC 60320-1:2021 CMV © IEC 2021
23.6.2 Straight pull test . 49
23.6.3 Lateral pull test . 49
24 Resistance to heat and ageing. 50
24.1 Resistance to heat . 50
24.2 Resist
...