Summary

The table below summarises the plug types, voltage and frequency of electrical current in both Tonga and St. Kitts and Nevis.

	Tonga	St. Kitts and Nevis
Plug Types	I	D, G
Voltage	240V	230V
Frequency of electrical current	50Hz	60Hz

Plug Adaptors

Tonga uses Plug Type I.

Considerations

Voltage

The voltages found in Tonga (240V) and St. Kitts and Nevis (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.

Frequency of Electrical Current

The frequency of electrical current found in Tonga (50Hz) differs to that found in St. Kitts and Nevis (60Hz).

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.