Before you pack: American Samoa uses Types A and B, 120 V and 60 Hz. At 120 V the supply sits well below the 230 V used across Europe. Power supplies marked “100–240 V” are fine; 230 V-only appliances are not. 60 Hz rather than 50 Hz matters only for motors and timers, not for power supplies.
The same socket system is used in Palau, the Marshall Islands, Micronesia and Guam, so one adapter covers all of them. Watch out when moving on: Tuvalu, the Cook Islands and New Zealand use a completely different system. Across Oceania this setup is fairly rare: 5 of 18 countries.
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. 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 American Samoa.
Which sockets are common in American Samoa?
Types A and B – that is what you will find in American Samoa (120 V, 60 Hz).
What voltage does American Samoa use?
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. American Samoa 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.