The table below summarises the plug types, voltage and frequency of electrical current in both Tonga and Antigua.
|Plug Types||I||A, B|
|Frequency of electrical current||50Hz||60Hz|
Tonga uses Plug Type I.
The voltages found in Tonga (240V) and Antigua (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency of electrical current found in Tonga (50Hz) differs to that found in Antigua (60Hz).
Most equipment is not affected by differences in frequencies. Some exceptions are: