What safety device is often installed in modern homes to prevent electrical fires?

The arc-fault circuit interrupter (AFCI) is a key safety device designed to enhance electrical safety in homes by preventing electrical fires. AFCIs work by detecting arcing faults, which can occur when there is a loose or damaged electrical connection. These arcing faults can generate enough heat to ignite nearby materials, leading to fires. When an AFCI detects this type of electrical discharge, it quickly shuts off the electrical circuit, thereby preventing potential fire hazards.

In modern residential electrical systems, installing AFCIs in bedrooms, living rooms, and other areas significantly reduces the risk of fires caused by faulty wiring, worn cords, or other electrical issues. This proactive measure is particularly important as home electrical loads increase, and the risk of electrical malfunctions rises.

Other options, while relevant to electrical systems, serve different purposes. A solar inverter converts solar energy into usable electrical power but does not actively prevent fires. A dimmer switch regulates the brightness of lights, and while it can enhance user experience, it does not contribute to fire safety. A receptacle tester checks for wiring issues in outlets but does not actively interrupt circuits to prevent arcing or fire-related events. Thus, the AFCI stands out as a critical component in modern safety measures designed specifically to