Technician exam question T0B06
Subelement T0, SAFETY· Group T0B
What is the minimum safe distance from a power line to allow when installing an antenna?
- A.Add the height of the antenna to the height of the power line and multiply by a factor of 1.5
- B.The height of the power line above ground
- C.1/2 wavelength at the operating frequency
- D.Enough so that if the antenna falls, no part of it can come within 10 feet of the power wires (correct answer)
WhyThe minimum safe distance from a power line when installing an antenna is enough that, if the antenna falls, no part of it can come within 10 feet of the power wires. Because a fall or structural failure is always a possibility, an antenna should be sited far enough from power lines that even if it came down, no part of it could land within 10 feet of the wires, answer D. A, B, and C all propose specific formulas or fixed distances that don't actually account for the real risk being guarded against, an antenna falling and reaching the power line.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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