What is the frequency on a transmission line?

The frequency of a transmission line is determined by the amount of alternating current (AC) power delivered through the lines. In the context of power systems, the standard frequency for electrical power in most of North America is 60 cycles per second, or Hertz (Hz). Therefore, this means that the correct answer to this question should reflect either 60 Hz as the standard used for most power lines in the U.S. and Canada.

Frequencies like 50 cycles or 25 cycles are more common in certain other parts of the world, but they are not typical for the U.S. transmission systems. Similarly, 30 cycles is an uncommon standard and does not represent a frequency used for any power transmission in either North America or globally.

To accurately respond to this question, it is crucial to recognize the common industry standards, which clarify that 60 cycles is indeed the widely accepted frequency for electrical systems in specific regions. Understanding frequency is essential for linemen as it directly impacts operational practices and safety protocols.