The table below summarises the plug types, voltage and frequency of electrical current in both Guinea-Bissau and Sierra Leone.
| Guinea-Bissau | Sierra Leone | |
|---|---|---|
| Plug Types | C | D, G |
| Voltage | 220V | 230V |
| Frequency of electrical current | 50Hz | 50Hz |
Guinea-Bissau uses Plug Type C.
In Sierra Leone there's more than one socket type in use. You may require more than one adaptor.
Socket Type C
(Guinea-Bissau) to Plug Type D
(Sierra Leone)
Socket Type C
(Guinea-Bissau) to Plug Type G
(Sierra Leone)
The voltages found in Guinea-Bissau (220V) and Sierra Leone (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Guinea-Bissau and Sierra Leone is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.