The table below summarises the plug types, voltage and frequency of electrical current in both Cook Islands and New Zealand.
| Cook Islands | New Zealand | |
|---|---|---|
| Plug Types | I | I |
| Voltage | 240V | 230V |
| Frequency of electrical current | 50Hz | 50Hz |
Cook Islands uses Plug Type I.
No adaptor needed
New Zealand uses Socket Type I, which is the same as the plug type of your appliances from Cook Islands. You will not need an adaptor.
The voltages found in Cook Islands (240V) and New Zealand (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Cook Islands and New Zealand is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.