Basic Qualification · B-003 Station assembly, practice and safety · B-003-019-010
On mains-operated power supplies, the ground wire of the AC line is connected to the power supply chassis. What protection does this provide if a fault occurs in the power supply?
- A Protects connected equipment from over voltage
- B Prevents damage to the AC supply circuit breaker
- C Prevents the equipment fuse from blowing unnecessarily
- D Ensures the chassis does not become energized
Correct answer: D — Ensures the chassis does not become energized. From the official ISED question bank, verified word for word.
Why
Connecting the ground wire to the chassis creates a safe path for electricity if a live wire accidentally touches the metal case. The full explanation — and one for every question — is in Pro.
Practise this section
Building a station safely: power supplies, grounding, RF exposure, lightning, feedline routing, and what a transmitter, receiver and transceiver actually do.