Technician exam question T0A09
Subelement T0, SAFETY· Group T0A
What should be done to all external ground rods or earth connections?
- A.Waterproof them with silicone caulk or electrical tape
- B.Keep them as far apart as possible
- C.Bond them together with heavy wire or conductive strap (correct answer)
- D.Tune them for resonance on the lowest frequency of operation
WhyAll external ground rods or earth connections should be bonded together with heavy wire or conductive strap. Bonding every ground rod and earth connection together with heavy wire or strap keeps them all at the same electrical potential, preventing dangerous voltage differences between them during a lightning strike or fault, answer C. Waterproofing rod connections (A) is a reasonable but secondary concern, spacing rods far apart (B) is the opposite of good bonding practice, and "tuning" a ground rod for resonance (D) isn't a real grounding technique.
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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