Extra exam question E0A01
Subelement E0, SAFETY· Group E0A
What is the primary function of an external earth connection or ground rod?
- A.Prevent static build up on power lines
- B.Lightning charge dissipation (correct answer)
- C.Reduce RF current flow between pieces of equipment
- D.Protect breaker panel from power surges
WhyAn external earth connection or ground rod's primary function is lightning charge dissipation. An external earth connection or ground rod's primary function is lightning charge dissipation, giving a strike a low-impedance path to earth rather than through the station or the building's wiring, answer B. It doesn't prevent static buildup on power lines, isn't primarily about reducing RF current flow between pieces of station equipment (that's addressed separately with RF bonding), and isn't specifically a breaker panel surge protector, that's a different, though related, protective measure.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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