Which plug adaptor do I need when travelling from Jamaica to Guam?

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Summary

The table below summarises the plug types, voltage and frequency of electrical current in both Jamaica and Guam.

JamaicaGuam
Plug TypesA, BA, B
Voltage110V110V
Frequency of electrical current50Hz60Hz

Plug Adaptors

In Jamaica there's more than one plug type in use.

What type of plug does your appliance have?

Your Appliance has Plug Type A

In Guam there's more than one socket type in use.

You will need this adaptor:

Socket Type
(Jamaica) to Plug Type B
(Guam)

Guam also uses Socket Type A, which is used in Jamaica. If using an appliance that has a Type A Plug in the Type A Sockets of Guam, you will not need an adaptor.

Your Appliance has Plug Type B

In Guam there's more than one socket type in use.

You will need this adaptor:

Socket Type
(Jamaica) to Plug Type A
(Guam)

Guam also uses Socket Type B, which is used in Jamaica. If using an appliance that has a Type B Plug in the Type B Sockets of Guam, you will not need an adaptor.

Considerations

Frequency of Electrical Current

The frequency of electrical current found in Jamaica (50Hz) differs to that found in Guam (60Hz).

Most equipment is not affected by differences in frequencies. Some exceptions are:

  • Electric clocks: Some electric clocks use the frequency of electrical current to measure time. If the clock is designed for one frequency, but used with another, time shifts could be experienced.
  • Appliances using motors: If there is a motor load associated with an appliance, the frequency governs the speed in revolutions of the motor. This could mean that the motor will spin faster, or slower than intended and could have a detrimental effect in the appliance's operation. This is of particular concern in power tools and other machinery that uses motors, so if you must use these, you should seek access to a frequency converter.

Good to know

Voltage

The voltage found in Jamaica and Guam is exactly the same (110V). You will not need a transformer.

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