Examine your item and the power supply. There will be a description of the current, expressed in voltage, and possibly a hertz (Hz) measurement. These figures will determine what equipment you need to run your appliance. If an item has an internal power switch on either the unit or within the power adapter, it may be expressed in a variable voltage number. Items that require a step-down transformer will say "240 V" only, whereas items that have an internal power switch will say "110 V - 240 V," or similar.
Look for a hertz frequency. This is common on items with motors, such as kitchen appliances. The U.S. uses a 60 Hz current, whereas the U.K. and Europe use 50 Hz currents. If an item has a hertz frequency that is is not expressed as being variable (for example "50/60 Hz"), then the item cannot be used on U.S. power, as it will be unable to function properly.
For items with an internal power switch, plug the power cord into a plug adapter. This adapter allows the item's plug to be accommodated by the wall socket and does not change the current or frequency. Plug the adapter into the wall socket and the item should power on as normal.
If the item does not say "110 V - 240 V," you will need a step-down converter, also called a transformer. Plug the item into the converter and plug the converter into the wall socket. The item should run as normal.
Things You Will Need
- Step-down transformer or plug adapter
- If an item does not say 50/60 Hz, it will not work in the US. Items such as televisions may work, but they may be incompatible with peripherals such as DVD players or gaming systems. When in doubt, refer to the manufacturer. If an item does not work properly, double check the voltage and hertz frequency.