The table below summarises the plug types, voltage and frequency of electrical current in both Costa Rica and Guam.
| Costa Rica | Guam | |
|---|---|---|
| Plug Types | A, B | A, B |
| Voltage | 120V | 110V |
| Frequency of electrical current | 60Hz | 60Hz |
In Costa Rica there's more than one plug type in use.
What type of plug does your appliance have?
In Guam there's more than one socket type in use.
You will need this adaptor:
Socket Type
(Costa Rica) to Plug Type B
(Guam)
Guam also uses Socket Type A, which is used in Costa Rica. If using an appliance that has a Type A Plug in the Type A Sockets of Guam, you will not need an adaptor.
In Guam there's more than one socket type in use.
You will need this adaptor:
Socket Type
(Costa Rica) to Plug Type A
(Guam)
Guam also uses Socket Type B, which is used in Costa Rica. If using an appliance that has a Type B Plug in the Type B Sockets of Guam, you will not need an adaptor.
The voltages found in Costa Rica (120V) and Guam (110V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Costa Rica and Guam is exactly the same (60Hz). Timing devices and appliances that use motors will function as expected under this frequency.