The table below summarises the plug types, voltage and frequency of electrical current in both Tonga and Slovakia.
| Tonga | Slovakia | |
|---|---|---|
| Plug Types | I | C, E |
| Voltage | 240V | 230V |
| Frequency of electrical current | 50Hz | 50Hz |
Tonga uses Plug Type I.
In Slovakia there's more than one socket type in use. You may require more than one adaptor.
Socket Type I
(Tonga) to Plug Type C
(Slovakia)
Socket Type I
(Tonga) to Plug Type E
(Slovakia)
The voltages found in Tonga (240V) and Slovakia (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Tonga and Slovakia is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.