Volts

The United States of America, and all of North America, operates on 110 volts (60-cycle electrical power).

Sockets

Most American sockets can accommodate both North American-style two or three-pronged plugs. However, when traveling from outside of the United States or Canada it is advisable to bring a plug adapter, especially if you are wishing to use your own small appliances, such as razors, hairdryers, etc.

Some North American two-pronged sockets cater to plugs with one small and one large prong. This is a safety feature on newer sockets, maintaining electrical polarity and lessening the chances of electrical shock.

North American electrical outlet with ground	North American electrical outlet without ground (polarized)