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AS/NZS 3120:2021


Approval and test specification — Cord extension sockets

AS/NZS 3120:2021 specifies essential safety requirements for cord extension sockets intended to be used at extra-low voltages. This Standard is to be read in conjunction with AS/NZS 3100.
Published: 01/10/2021
Pages: 24
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Table of contents
Cited references
Content history
Table of contents
About this publication
1 Scope and general
1.1 Scope and application
1.1.1 Scope
1.1.2 Application General requirements of AS/NZS 3100 Specific requirements of this standard
1.2 Normative references
1.3 Terms and definitions
2 Cord extension sockets
2.1 General
2.2 Exemptions for extra-low voltage sockets
2.3 Limitation of outlets
2.4 Terminals and internal connections
2.4.1 Material
2.4.2 Construction of terminals
2.5 Contacts
2.5.1 Material
2.5.2 Construction
2.5.3 Depth of contacts
2.6 Dimensions
2.6.1 Pin entry apertures for flat-pin plugs
2.6.2 Socket face projection Socket face of sockets rated at 10 A and 15 A Configurations covered
2.7 Arrangement of earthing connections
2.8 Insulating materials
2.9 Attachment of covers
2.10 External shape
2.10.1 General 10 A and 15 A sockets with 360° projection 20 A sockets without a 360° projection
2.10.2 Pendent type sockets
2.10.3 Other than pendent type sockets
2.10.4 Finger grip
2.11 Exposed metal
2.12 Means of entry and cord anchorage for flexible cord
2.13 Ratings
2.13.1 Voltage rating
2.13.2 Current rating
2.14 Internal connections
2.15 Prevention of contact with live pins
2.15.1 Assembly
2.15.2 During normal insertion
2.15.3 During other than normal insertion
2.16 Fuses
2.17 Switches
2.18 Sockets with a clamping mechanism
2.19 Marking
2.19.1 Required marking
2.19.2 Location of marking
2.19.3 Additional requirements for rewireable sockets
2.19.4 Earthing connections
2.19.5 Live connections General Location of marking
2.19.6 Configuration of sockets intended for flat-pin plugs
2.20 Tests
2.20.1 General
2.20.2 Withdrawal force test
2.20.3 Additional test for sockets with clamping or locking mechanism
2.20.4 Tumbling barrel test
2.20.5 Insulation resistance test No. 1
2.20.6 High voltage test
2.20.7 Current breaking test
2.20.8 Test of temperature rise
2.20.9 Insulation resistance test No. 2
2.20.10 Flexible cord anchorage test
2.20.11 Test of earthing connection
2.20.12 Test for attachment of covers
2.20.13 Test for the fixing of contacts in resilient or thermoplastic sockets
2.20.14 Additional tests for non-rewireable sockets
3 Inlet plug
3.1 General
3.2 Standard ratings
3.3 Marking
3.4 Dimensions and compatibility
3.5 Construction
3.5.1 Inlet plugs
3.5.2 Terminals
3.5.3 Mechanical strength
3.6 Parts providing protection
3.7 Resistance to heat
3.8 Screws, current-carrying parts and connections
3.9 Tests on inlet plugs
3.9.1 General
3.9.2 Insulation resistance test
3.9.3 High voltage test
3.9.4 Cover operating test
3.9.5 Determination of ignitability and combustion propagation
Cited references in this standard
Degrees of protection provided by enclosures (IP Code)
Approval and test specification — General requirements for electrical equipment
Approval and test specification — Plugs and socket-outlets
Approval and test specification — Insulating mouldings
Approval and test specification — Plugs, socket-outlets and couplers for general industrial application
Content history
DR AS/NZS 3120:2021