New Zealand.

230 V · 50 Hz on Type I.

Type I10 A · earthed

Identical territory to Australia: switched Type I sockets at 230 V 50 Hz, so anything bought on one side of the Tasman plugs straight in on the other. Europeans need only a shape adapter for dual-voltage devices; North American 120 V appliances need voltage conversion as well.

The voltage window

A nominal 230 V supply may legitimately sit anywhere between 207 and 253 V (±10%). Dual-voltage gear (marked 100–240 V) shrugs at all of it.

Grid facts verified against IEC World Plugs — New Zealand. Prose is our own.

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Pack an adapter — New Zealand runs 230 V 50 Hz on Type I — and your 120 V appliances need to be dual-voltage or transformed, adapter or not.

Type A needs an adapter
New Zealand's Type I sockets don't take a Type A plug.
the full story
Type B needs an adapter
New Zealand's Type I sockets don't take a Type B plug.
the full story

Faces drawn to scale from pin dimensions · verdicts are physical fit + voltage math, not safety advice — when in doubt, ask the hardware store, not the internet.