Engineering · Electrical — Faults
On an ungrounded ship's distribution system, the ground-detection lights indicate that:
- AThe system is overloaded
- BOne phase has developed a ground (earth) fault✓ Correct
- CThe generator is out of synchronization
- DThe batteries are discharged
Explanation
Ground lamps glow equally when the system is healthy. If one phase grounds, its lamp dims and the others brighten, signaling the fault so it can be found before a second ground causes a short.
Authority: Marine Electrical (USCG engineering topic)
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