Technician exam question T0B08
Subelement T0, SAFETY· Group T0B
Which is a proper grounding method for a tower?
- A.A single four-foot ground rod, driven into the ground no more than 12 inches from the base
- B.A ferrite-core RF choke connected between the tower and ground
- C.A connection between the tower base and a cold-water pipe
- D.Separate eight-foot ground rods for each tower leg, bonded to the tower and each other (correct answer)
WhyA proper grounding method for a tower is separate eight-foot ground rods for each tower leg, bonded to the tower and each other. Driving a separate deep ground rod at each leg of a tower and bonding all of them together, and to the tower itself, gives lightning current multiple low-impedance paths to earth and keeps every ground point at the same potential, answer D. A single shallow rod close to the base (A) provides far less surge capacity, a ferrite choke (B) isn't a grounding method at all, and bonding to a household cold-water pipe (C) doesn't provide a reliable, code-compliant earth ground for a tower.
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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