What is the minimum safe distance from a power line to allow when installing an antenna?
Add the height of the antenna to the height of the power line and multiply by a factor of 1.5
The height of the power line above ground
1/2 wavelength at the operating frequency
Enough so that if the antenna falls, no part of it can come within 10 feet of the power wires✓Correct answer
Explanation
The clearance must be judged against the worst case, which is the antenna or mast falling over, so the installation is sited far enough away that no part can reach within 10 feet of the wires even if it comes down. Formulas based on wavelength or line height do not address that failure case.