What is the most common frequency for AC power in North America?

The most common frequency for AC power in North America is 60Hz. This standard has been in place since the early 20th century when various power companies began to adopt it widely due to its efficiency in power transmission and compatibility with electric motors and other devices.

Operating at 60Hz allows electrical systems to effectively minimize power losses and ensures that devices operate smoothly, as many household appliances, industrial equipment, and electronics are designed to function optimally at this frequency. The adoption of 60Hz has also facilitated the development of a consistent and reliable power grid infrastructure across the region.

In contrast, other frequencies mentioned in the choices, such as 50Hz, are more common in different parts of the world, particularly in Europe and Asia. Frequencies like 70Hz and 80Hz are not standard for power distribution and would lead to compatibility issues for equipment designed for the established 60Hz standard in North America. Thus, 60Hz is critical for maintaining consistency and reliability in the electrical systems used throughout the continent.