What is the frequency of standard AC power in the United States?

The frequency of standard AC power in the United States is 60 Hz. This means that the alternating current completes 60 cycles per second. This frequency is widely adopted in North America and has characteristics that make it suitable for efficient operation of electrical equipment and machinery.

Most electrical devices in the U.S. are designed to operate optimally at this frequency, ensuring that motors run smoothly and that appliances function as intended. 50 Hz, while used in other parts of the world, is not the standard for U.S. power. The other frequencies listed, such as 70 Hz and 75 Hz, are not standard for electrical power generation or distribution and are therefore not used in any commercial or residential power systems in the United States.