What must junction boxes contain to ensure safety?

Junction boxes play a critical role in electrical safety and must contain certain protective devices to prevent hazards. The presence of a Ground Fault Circuit Interrupter (GFCI) within junction boxes is essential because it helps protect against electrical shock. GFCIs are designed to monitor the electrical current flowing through a circuit and can detect imbalances that may occur when electrical current leaks to the ground. When such an imbalance is detected, the GFCI quickly disconnects the power to prevent serious electrical injuries.

In areas where there is a higher risk of electrical shock, such as bathrooms, kitchens, or outdoor settings, the incorporation of GFCIs in junction boxes becomes vital. This preventive measure ensures that even in the case of a fault, the risk to individuals remains minimal.

The other options like AFF (which refers to Above Finished Floor), extension cords, and surge protectors do not provide the same level of immediate safety against electrical shock. While surge protectors can help prevent damage from power surges, they do not safeguard users from the potential risks associated with ground faults. Similarly, extension cords are not meant to be housed in junction boxes, and AFF does not pertain to electrical safety directly. Therefore, GFCI is specifically the necessary component for