In the sense of this definition, it is almost always considered a fault condition.

This differs from the protective grounding wire, which only carries current under fault conditions.

Often the system must additionally be designed so that fault conditions do not interrupt power, but generate a warning.

An engineering analysis of the power system under fault conditions can be used to determine whether or not hazardous step and touch voltages will develop.

The ability to distinguish between a fault condition and non-risk conditions is called discrimination.

Its basic function is to detect a fault condition and interrupt current flow.

Finally, once the fault condition has been cleared, the contacts must again be closed to restore power to the interrupted circuit.

A system that periodically samples voltage and looks for sudden changes can be used to detect a fault condition.

There is therefore a "no fault" condition for the catcher attempting to prevent a steal.

Primarily, residual or ground current detection is used to detect possible fault conditions.