Question 312Electricity & Electronics - Assistant Engineer

The correct answer is A) two ground faults associated with different phases. In an ungrounded distribution system, a single ground fault will not cause a circuit breaker to trip since the system is not grounded. However, if there are two ground faults associated with different phases, it can create a low-impedance path between those phases, resulting in a phase-to-phase fault. This condition is likely to trigger the circuit breaker to trip, causing an outage. The other options are incorrect because: B) a single ground fault will not cause an outage, C) ground faults can result in outages under certain conditions, and D) two ground faults on the same phase would not create a phase-to-phase fault.