The table below summarises the plug types, voltage and frequency of electrical current in both Puerto Rico and Guam.
| Puerto Rico | Guam | |
|---|---|---|
| Plug Types | A, B | A, B |
| Voltage | 120V | 110V |
| Frequency of electrical current | 60Hz | 60Hz |
In Puerto Rico 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
(Puerto Rico) to Plug Type B
(Guam)
Guam also uses Socket Type A, which is used in Puerto Rico. 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
(Puerto Rico) to Plug Type A
(Guam)
Guam also uses Socket Type B, which is used in Puerto Rico. 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 Puerto Rico (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 Puerto Rico and Guam is exactly the same (60Hz). Timing devices and appliances that use motors will function as expected under this frequency.