The table below summarises the plug types, voltage and frequency of electrical current in both Mexico and Costa Rica.
| Mexico | Costa Rica | |
|---|---|---|
| Plug Types | A | A, B |
| Voltage | 127V | 120V |
| Frequency of electrical current | 60Hz | 60Hz |
Mexico uses Plug Type A.
In Costa Rica there's more than one socket type in use.
You will need this adaptor:
Socket Type
(Mexico) to Plug Type B
(Costa Rica)
Costa Rica also uses Socket Type A, which is used in Mexico. If using an appliance that has a Type A Plug in the Type A Sockets of Costa Rica, you will not need an adaptor.
The voltages found in Mexico (127V) and Costa Rica (120V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Mexico and Costa Rica is exactly the same (60Hz). Timing devices and appliances that use motors will function as expected under this frequency.