General exam question G4C12
Subelement G4, AMATEUR RADIO PRACTICES· Group G4C
Why must all metal enclosures of station equipment be grounded?
- A.It prevents a blown fuse in the event of an internal short circuit
- B.It prevents signal overload
- C.It ensures that the neutral wire is grounded
- D.It ensures that hazardous voltages cannot appear on the chassis (correct answer)
WhyMetal enclosures of station equipment must be grounded to ensure that hazardous voltages cannot appear on the chassis. Grounding every metal equipment enclosure gives any fault current, such as a hot conductor shorting to the case, a safe, low-impedance path to ground instead of energizing the chassis, so a person touching it can't be exposed to a hazardous voltage, answer D. Grounding isn't primarily there to blow a fuse, prevent signal overload, or ground the neutral wire (neutral grounding happens elsewhere in the electrical system), so A, B, and C misidentify the real safety purpose.
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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