Types A and B, 120 V, 60 Hz – those are the basics for electricity in the Marshall Islands. 120 V instead of 230 V: check the rating plate before you plug in a hair dryer. An adapter does not change voltage. The grid runs at 60 Hz. Chargers do not care; mains-synchronised clocks and simple motors do.
You will find identical sockets in Palau, Micronesia, American Samoa and Guam. Watch out when moving on: Fiji, Vanuatu and the Cook Islands use a completely different system. In Oceania, 5 of 18 recorded destinations use exactly this combination.
Protective earth
Grounded and ungrounded sockets may occur
Mixed supply: Type A without earth, Type B with earth. Which one is in your room only shows on arrival.
Check the rating plate: 120 V suits “100–240 V” supplies, not single-voltage appliances. Frequency is 60 Hz; timers and simple motors run differently. Check your own device →
The Marshall Islands uses Types A and B at 120 V and 60 Hz.
What voltage does the Marshall Islands use?
the Marshall Islands supplies 120 V. Dual-voltage chargers are fine; 230 V-only appliances need a converter.
An adapter changes the plug shape only, not voltage or frequency. the Marshall Islands 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.