Home Inspection State Practice Exam

What does a ground fault circuit interrupter (GFCI) disconnect when it senses current leakage?

1. The entire circuit

2. Only the light fixtures

3. The power

4. Appliances connected to the GFCI

The correct answer is: The power

A ground fault circuit interrupter (GFCI) is designed to enhance electrical safety by monitoring the flow of electrical current. When it detects a difference in the electrical current between the hot and neutral wires—often caused by current leakage to ground—it quickly disconnects the power to prevent electrical shock. The correct answer highlights that the GFCI disconnects the power in response to this leakage, ensuring that any current escaping from the circuit is stopped, thereby protecting individuals from potential electrical hazards. This is particularly important in areas where water is present, such as kitchens and bathrooms, where the risk of electric shock is higher. The other choices may suggest different levels of disconnection but do not accurately reflect the function of a GFCI. For instance, while it may appear that only specific components like appliances or circuits are affected, the GFCI's primary role is to immediately cut off power altogether when it detects an issue, which encompasses all devices and components connected to that circuit.