Sockets in U.S. Virgin Islands: Types A and B, supplied with 110 V at 60 Hz. 110 V instead of 230 V: check the rating plate before you plug in a hair dryer. An adapter does not change voltage. 60 Hz rather than 50 Hz matters only for motors and timers, not for power supplies.
You will find identical sockets in Bermuda, Haiti, Nicaragua and Aruba. Nearby but different: Saint Lucia, Greenland and Dominica – an adapter for U.S. Virgin Islands will not fit there. 24 of the 31 destinations in North and Central America share the plug types of U.S. Virgin Islands.
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.
At 110 V a 230 V-only hair dryer will not work properly; dual-voltage chargers will. The 60 Hz supply matters for motors and mains clocks, not for chargers. Check your own device →
U.S. Virgin Islands uses Types A and B at 110 V and 60 Hz.
Do I need a voltage converter for U.S. Virgin Islands?
U.S. Virgin Islands supplies 110 V. Dual-voltage chargers are fine; 230 V-only appliances need a converter.
An adapter changes the plug shape only, not voltage or frequency. U.S. Virgin Islands supplies 110 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.