EICA Mobile Crane & Digger Practice Test 2025 - Free Mobile Crane & Digger Practice Questions and Study Guide

The scenario described involves a person being in contact with a crane that is grounded to the system neutral while simultaneously touching an energized line. In this case, the person would be exposed to full fault potential.

When a crane is grounded, any fault that occurs can cause the grounding voltage to rise to the potential of the energized line. If the person is in contact with both the crane and an energized source, they effectively create a path for current to flow through their body. This situation makes them susceptible to the full voltage of the energized line.

Understanding the implications of grounding in electrical systems is key. A grounded system means that the neutral point is connected to the earth, offering some level of protection against possible faults. However, if a fault occurs and a person is in contact with both the grounded crane and the energized line, they are subjected to the line's full voltage, which can be extremely dangerous. Safety protocols typically emphasize avoiding contact with both grounded and energized systems simultaneously to prevent severe electrical shocks or electrocution.