General exam question G0B11
Subelement G0, ELECTRICAL AND RF SAFETY· Group G0B
Which of the following is required for lightning protection ground rods?
- A.They must be bonded to all buried water and gas lines
- B.Bends in ground wires must be made as close as possible to a right angle
- C.Lightning grounds must be connected to all ungrounded wiring
- D.They must be bonded together with all other grounds (correct answer)
WhyLightning protection ground rods must be bonded together with all other grounds. Good lightning-protection practice calls for bonding every ground system at a property, station ground, electrical service ground, and lightning ground, together, so a strike's massive current has one common low-impedance path to earth instead of finding differences in potential between separately grounded systems, answer D. Ground rods don't need to be individually bonded to buried water and gas lines, sharp right-angle bends in a ground conductor are actually something to avoid (bends should be as gradual as possible to reduce inductance), and lightning grounds don't need to connect to all ungrounded wiring in the structure, so A, B, and C are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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