AS/NZS 3112 Explained
Last updated: October 2026
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Plugs and socket-outlets used in Australia and New Zealand
AS/NZS 3112 sets out requirements for plugs and socket-outlets used with electrical equipment in Australia and New Zealand.
For MegaTest, the appliance electrical testing division of NZ Test Group, it is particularly relevant when inspecting plugs fitted to workplace equipment and identifying imported or unsuitable electrical products.
What Does AS/NZS 3112 Cover?
AS/NZS 3112 covers the design and safety requirements for plugs and socket-outlets used with electrical equipment.
Most people recognise the familiar Australian and New Zealand three-pin plug, with two angled flat pins for active and neutral and a vertical earth pin on earthed equipment.
The standard addresses features intended to ensure plugs and socket-outlets provide a safe and reliable connection to the electrical supply.
Why Do New Zealand Plugs Have Insulated Pins?
One of the most visible safety features of modern New Zealand plugs is the insulation around part of the active and neutral pins.
This insulation helps reduce the risk of accidental contact with live metal while a plug is being inserted into or removed from a socket-outlet.
Older plugs without insulated pins can still be encountered, particularly on older equipment.
Whether an older plug remains suitable needs to be considered in the context of the equipment, its condition and the requirements that apply to it.
What Do We Look for When Inspecting a Plug?
The plug is one of the most important parts of an electrical equipment inspection because it is regularly handled and can be subjected to considerable wear.
A visual inspection may identify issues such as damaged or bent pins, cracked plug bodies, loose components, heat damage, damaged cord entry points or inappropriate repairs.
The condition of the plug can sometimes identify an unsafe appliance before any electrical testing begins.
What About Imported Electrical Equipment?
Electrical equipment purchased overseas or through international online marketplaces may be supplied with a plug that was designed for another country's electrical system.
A plug physically fitting into a New Zealand socket does not by itself establish that the equipment is suitable or compliant for use in New Zealand.
The equipment itself, its voltage and frequency ratings, plug arrangement and any other applicable product requirements may also need to be considered.
This is particularly relevant when purchasing electrical appliances from overseas websites or bringing equipment into New Zealand from another country.
Can I Just Use a Travel Adaptor?
Travel adaptors are designed primarily to allow travellers to temporarily connect suitable equipment to different socket configurations.
They should not automatically be treated as a permanent solution for equipment being routinely used in a New Zealand workplace.
Some universal adaptors and overseas plug arrangements can also present electrical safety concerns.
Where equipment is intended for ongoing use in New Zealand, it is worth establishing whether the appliance and its connection arrangement are appropriate rather than simply relying on an adaptor.
Is AS/NZS 3112 the Same as Test & Tag? No. AS/NZS 3112 relates to plugs and socket-outlets themselves, while AS/NZS 3760 provides a framework for the in-service safety inspection and testing of electrical equipment and RCDs.
During a Test & Tag inspection, however, the plug forms an important part of the visual assessment.
An electrical appliance cannot simply be considered safe because it passes an electrical test if there is an obvious safety issue with its plug, cord or physical condition.
What About Second-Hand Electrical Equipment?
Plugs are also important when inspecting second-hand electrical equipment.
AS/NZS 5761 provides a framework for the inspection and testing of second-hand electrical equipment before it is offered for sale.
An unsuitable, damaged or incorrectly fitted plug may therefore need to be addressed before second-hand equipment is considered suitable for sale.
Does a New Zealand-Style Plug Mean the Appliance Complies?
Not necessarily.
Having a plug that looks correct or fits a New Zealand socket-outlet does not automatically demonstrate that the complete appliance meets every requirement that may apply in New Zealand.
Electrical product compliance can involve requirements beyond the plug itself.
This is especially important with imported equipment, where a New Zealand-style plug may have been fitted even though other aspects of the appliance still need consideration.
Where Does AS/NZS 3112 Fit With Other Standards?
AS/NZS 3112 is one part of the wider electrical safety framework.
AS/NZS 3760 deals with the in-service inspection and testing of electrical equipment, while AS/NZS 5761 deals with second-hand electrical equipment offered for sale.
Other electrical safety and product requirements may also apply depending on the equipment and how it enters the New Zealand market.
Understanding these differences is important because Test & Tag alone does not establish that an electrical product meets every requirement applying to it in New Zealand.
Need Help With AS/NZS 3112?
MegaTest – Appliance Electrical Testing
MegaTest provides electrical equipment inspection, testing and compliance solutions as part of NZ Test Group.
If you're unsure about a plug, imported appliance, travel adaptor or electrical equipment being used in your workplace, talk to our team.