What is the required minimum distance from power lines when placing antennas?

What is the required minimum distance from power lines when placing antennas?

• A. At least two antenna lengths away from power lines
• B. Directly adjacent to power lines
• C. At least one wavelength away from power lines
• D. Distance from power lines is not specified

Answer: (A)

Safety clearance from power lines is the key idea here. Keeping the antenna at least two lengths away from any power line provides a practical margin that reduces the risk of RF energy inducing currents in the line, arcing between conductors, or interference with the power system and your radio setup. This rule balances safety with field practicality: it’s far enough to be protective, but not so far as to make deployment impractical. Standing directly next to a power line would not provide this protective gap and could be hazardous. Saying the distance is not specified fails to give you a safe operating rule, while requiring one wavelength would be unnecessarily large for most field deployments.

Safety clearance from power lines is the key idea here. Keeping the antenna at least two lengths away from any power line provides a practical margin that reduces the risk of RF energy inducing currents in the line, arcing between conductors, or interference with the power system and your radio setup. This rule balances safety with field practicality: it’s far enough to be protective, but not so far as to make deployment impractical. Standing directly next to a power line would not provide this protective gap and could be hazardous. Saying the distance is not specified fails to give you a safe operating rule, while requiring one wavelength would be unnecessarily large for most field deployments.