Micronesia runs on 120 V at 60 Hz, with sockets following Types A and B. The grid in Micronesia delivers 120 V. Dual-voltage gear copes; single-voltage 230 V devices do not. 60 Hz rather than 50 Hz matters only for motors and timers, not for power supplies.
The same socket system is used in Guam, American Samoa, the Marshall Islands and Palau, so one adapter covers all of them. Watch out when moving on: Nauru, Vanuatu and Fiji use a completely different system. 5 of the 18 destinations in Oceania share the plug types of Micronesia.
Protective earth
Grounded and ungrounded sockets may occur
Earthed sockets (Type B) and unearthed ones (Type A) exist side by side. For metal-bodied appliances the protective-earth path is what matters.
Check the rating plate: 120 V suits “100–240 V” supplies, not single-voltage appliances. The 60 Hz supply matters for motors and mains clocks, not for chargers. Check your own device →
Yes. UK plugs do not fit the sockets in Micronesia.
Which plug type does Micronesia use?
Types A and B – that is what you will find in Micronesia (120 V, 60 Hz).
Do I need a voltage converter for Micronesia?
At 120 V it depends on the rating plate: “100–240 V” is fine, single-voltage gear is not.
An adapter changes the plug shape only, not voltage or frequency. Micronesia supplies 120 V at 60 Hz – check the rating plate on your device. How to read a rating plate →
If a socket gets hot, crackles or smells burnt, unplug the device straight away.