During fault current flow, one danger from grounds is what phenomenon?

The phenomena associated with fault current flow that poses a significant danger involves cable whipping. When fault current occurs, especially due to ground faults, it can create a large amount of mechanical stress on conductors. This stress can lead to a rapid movement of cables, often referred to as "whipping."

Whipping can result when the fault current is high and the cables are not adequately restrained. The movement of cables can pose safety hazards to personnel nearby and can also lead to damage to equipment or structures as cables whip around unexpectedly. Therefore, understanding the risk of cable whipping is crucial for ensuring safety during instances of fault current.

The other options all represent valid electrical issues that can arise from fault current, but they do not specifically encapsulate the physical danger posed by the mechanical movement of cables like whipping does. Ground faults refer to an electrical fault where current flows to the ground instead of the intended load, short circuits involve unintended paths for the current that create a low-resistance path, and power surges indicate a sudden increase in voltage. None of these specifically address the physical dangers associated with the mechanical stress and movement caused during fault current flow that results in cable whipping.