Which plug adaptor do I need when travelling from Tahiti (French Polynesia) to Cook Islands?

Summary

The table below summarises the plug types, voltage and frequency of electrical current in both Tahiti (French Polynesia) and Cook Islands.

	Tahiti (French Polynesia)	Cook Islands
Plug Types	A, B, E	I
Voltage	110V, 220V	240V
Frequency of electrical current	60Hz	50Hz

Plug Adaptors

In Tahiti (French Polynesia) there's more than one plug type in use.

What type of plug does your appliance have?

Type A
Type B
Type E

Your Appliance has Plug Type A

You will need this adaptor:

Socket Type
(Tahiti (French Polynesia)) to Plug Type I
(Cook Islands)

Your Appliance has Plug Type B

You will need this adaptor:

Socket Type
(Tahiti (French Polynesia)) to Plug Type I
(Cook Islands)

Your Appliance has Plug Type E

You will need this adaptor:

Socket Type
(Tahiti (French Polynesia)) to Plug Type I
(Cook Islands)

Warnings

Voltage

The voltage, 110V, which is present in Tahiti (French Polynesia), is significantly different to what's used in Cook Islands.

Some appliances are compatible with multiple voltages. To find out if your appliance is one of them, check the appliance label and/or instruction booklet. An example appliance label is below.

Appliance label showing a tolerable voltage range of 100 to 240 volts — This appliance is compatible with a range of voltages as it shows two voltage figures with a dash in between them. In this example, the appliance may be plugged into any outlet ranging from 100 to 240V without a voltage transformer, though a socket adaptor would still be needed if the sockets don't match.

See examples of appliance labels

Appliance label showing a voltage of 120 volts — This appliance is only compatible with a single voltage as only one voltage (120V) is printed on the label.

Appliance label showing two tolerable voltages: 115 volts and 230 volts — This appliance is compatible two voltages as it shows two voltage figures with a slash between them. Appliances displaying labels like this will have a physical switch located on them somewhere, allowing you to switch between the two voltages shown here. In this example, the appliance may be plugged into an outlet of 115V or 240V (provided the switch is in the correct position) without a voltage transformer, though a socket adaptor would still be needed if the sockets don't match.

Is your appliance compatible with the voltage used in Cook Islands (240V)?

If your appliance is not compatible with multiple voltages, you will need a transformer to adjust the voltage input when using your appliance in Cook Islands.

Considerations

Voltage

The voltage, 220V, which is also present in Tahiti (French Polynesia), is not exactly the same to what's used in Cook Islands, but the difference is tolerable, so you should not need a transformer when using sockets with this voltage. Be sure to carefully check the voltage before using your appliance in sockets in Cook Islands. You may need to ask a local resident, an electrician, or the local government to find out in situations when the power sockets are not labelled with their voltages.

Frequency of Electrical Current

The frequency of electrical current found in Tahiti (French Polynesia) (60Hz) differs to that found in Cook Islands (50Hz).

Most equipment is not affected by differences in frequencies. Some exceptions are:

Electric clocks: Some electric clocks use the frequency of electrical current to measure time. If the clock is designed for one frequency, but used with another, time shifts could be experienced.
Appliances using motors: If there is a motor load associated with an appliance, the frequency governs the speed in revolutions of the motor. This could mean that the motor will spin faster, or slower than intended and could have a detrimental effect in the appliance's operation. This is of particular concern in power tools and other machinery that uses motors, so if you must use these, you should seek access to a frequency converter.

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