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A ground/earth fault is a fault where part of the current returns back through a path other than the opposing hot or, more critically, neutral. A neutral/earth fault is dangerous because the circuit will continue to function normally, but the hot and neutral leg currents are imbalanced, and the chassis can become energized.
Part of the San Andreas fault. The definition of a fault is a weakness in the rock strata that can shift and create an earthquake. An example of fault is the San Andreas fault line in California. Fault means a mistake or a weakness. An example of fault is having a problem telling the truth. Fault is defined as to blame or to commit a mistake. 1  An example of fault is for a child to blame a broken vase on his brother.