In the United States, alternating current is provided by utility companies at how many hertz or cycles per second?

In the United States, utility companies supply alternating current (AC) at a frequency of 60 hertz, which means the current alternates directions 60 times per second. This standard frequency is crucial for the proper functioning of household appliances and electrical systems. Many devices are designed to operate optimally at this frequency, ensuring efficiency and safety.

The choice of 60 hertz has historical roots, as it became the standard for electrical power transmission and distribution in the early 20th century. This frequency allows for a good balance between efficiency in power transmission and the performance of electric motors and other electrical devices. Understanding this standard is important for anyone involved in the electrical or construction fields, as it influences the design and operation of electrical systems in homes and businesses.