Nate Core Practice Test

What does a GFCI protect users from?

1. Overcurrent situations

2. Surge voltage

3. Dangerous ground faults

4. Short circuits

The correct answer is: Dangerous ground faults

A Ground Fault Circuit Interrupter (GFCI) is designed specifically to protect users from dangerous ground faults. A ground fault occurs when there is an unintended path between the source of current and the grounded surface, which can happen if equipment or electrical cords malfunction, are damaged, or come into contact with water. When a ground fault occurs, the GFCI detects the difference in the current flowing into and out of the circuit. If it senses an imbalance, which indicates that the current is flowing through an unintended path (likely through a person), it rapidly disconnects the power to prevent electric shock. This is particularly important in areas where moisture is present, such as bathrooms, kitchens, and outdoor settings, where the risk of electric shock is heightened. The other options, while related to electrical safety, do not encompass the specific function of a GFCI. Overcurrent situations refer to excessive current that can cause overheating and potential fire hazards, which is managed by circuit breakers. Surge voltage involves high spikes of voltage that can damage electrical devices, typically mitigated by surge protectors. Short circuits occur when there is an unintended connection in a circuit, leading to a quick and excessive flow of current, which can also be protected against by circuit breakers but