What is the most common frequency for AC power in residential homes?

The most common frequency for alternating current (AC) power in residential homes in the United States is 60Hz. This means that the current alternates at a rate of 60 cycles per second, which is standardized for most electric utilities across the country. The use of 60Hz has historical roots and has been the established frequency since the early 20th century, allowing appliances and electrical devices to function reliably within this specification.

In contrast, 50Hz is typically used in many other parts of the world, such as Europe and Asia, but is not the norm for residential power in the U.S. Frequencies like 100Hz and 120Hz are not commonly used in residential power systems and do not align with standard utility frequencies. Understanding this standard helps in the selection and use of electrical devices, ensuring compatibility and optimal performance in residential installations.