Which of the following best describes the purpose of a GFCI?

Which of the following best describes the purpose of a GFCI?

• A. To enhance the power supply
• B. To detect and interrupt ground faults
• C. To improve lighting efficiency
• D. To serve as an electrical meter

Answer: (B)

The purpose of a Ground Fault Circuit Interrupter (GFCI) is to detect and interrupt ground faults, which are instances where electricity is unintentionally flowing outside its intended path. This typically occurs when there’s a fault in the wiring or if a person comes into contact with the current, posing a risk of electric shock. GFCIs work by continuously monitoring the flow of electricity in a circuit. If they sense any imbalance between the outgoing and incoming currents—indicating that some current is escaping to the ground—they quickly cut off the power to prevent potential harm. This makes them crucial safety devices, particularly in areas where water is present, such as kitchens, bathrooms, and outdoor settings. The other options do not accurately represent the functionality of a GFCI. Enhancing power supply pertains to electrical efficiency or stability, while improving lighting efficiency is related to the design of lighting fixtures and bulbs. Serving as an electrical meter involves measuring current, voltage, or electrical consumption, which is outside the role of a GFCI. Therefore, the defining characteristic of a GFCI is its ability to detect ground faults and interrupt them to ensure user safety.

The purpose of a Ground Fault Circuit Interrupter (GFCI) is to detect and interrupt ground faults, which are instances where electricity is unintentionally flowing outside its intended path. This typically occurs when there’s a fault in the wiring or if a person comes into contact with the current, posing a risk of electric shock.

GFCIs work by continuously monitoring the flow of electricity in a circuit. If they sense any imbalance between the outgoing and incoming currents—indicating that some current is escaping to the ground—they quickly cut off the power to prevent potential harm. This makes them crucial safety devices, particularly in areas where water is present, such as kitchens, bathrooms, and outdoor settings.

The other options do not accurately represent the functionality of a GFCI. Enhancing power supply pertains to electrical efficiency or stability, while improving lighting efficiency is related to the design of lighting fixtures and bulbs. Serving as an electrical meter involves measuring current, voltage, or electrical consumption, which is outside the role of a GFCI. Therefore, the defining characteristic of a GFCI is its ability to detect ground faults and interrupt them to ensure user safety.