Nate Electrical Practice Exam 2025 - Free Electrical Practice Questions and Study Guide

When a ground fault is detected by a Ground Fault Circuit Interrupter (GFCI), the device quickly interrupts the electrical flow. This is a critical safety feature designed to protect people from electric shock and prevent electrical fires. A ground fault occurs when electricity flows through an unintended path, such as a person or a faulty appliance.

The GFCI constantly monitors the amount of current flowing from the hot wire to the neutral wire. If it detects an imbalance, which indicates that some current is leaking to the ground, it acts swiftly to cut off the electrical supply. This interruption happens in a fraction of a second, significantly reducing the risk of injury or damage.

The other choices do not correctly describe the function of a GFCI during a ground fault. Increasing voltage output, modifying current flow, or boosting resistance are not actions performed by a GFCI in response to a ground fault. Instead, the primary and vital action taken is the interruption of the electrical flow to halt any hazardous situation immediately.