How do GFCI receptacles help prevent electrical fires?

GFCI (Ground Fault Circuit Interrupter) receptacles help prevent electrical fires primarily by detecting ground faults. A ground fault occurs when electricity takes an unintended path to the ground, which can happen if a person accidentally comes into contact with energized parts or if there's a fault in the wiring or equipment. The GFCI monitors the flow of current through the circuit and can quickly sense any imbalance between the incoming and outgoing currents.

If a ground fault is detected, the GFCI interrupts the electrical circuit in a fraction of a second, significantly reducing the risk of electric shock that could lead to a fire. This quick response to ground faults is crucial, as it prevents the potential overheating and damage to wiring and appliances that can result from these electrical faults, thereby helping to prevent electrical fires.

The other provided choices do not directly pertain to the purpose or function of GFCI receptacles in preventing electrical fires. Increasing current flow, regulating voltage, and preventing overloads address different aspects of electrical safety and management but do not directly relate to the mechanism by which GFCI devices protect against faults that could result in fires.