Name a common cause of electrical fires.

Overloaded circuits or faulty wiring is a significant cause of electrical fires due to the way electricity flows through conductors. When circuits are overloaded, they carry more current than they're designed to handle. This excess current generates heat, which can ignite surrounding materials, leading to a fire. Faulty wiring, whether from improper installation, wear and tear, or damage, can create pathways for short circuits or arcing, both of which are dangerous fire hazards.

In contrast, using energy-efficient appliances typically results in lower energy consumption and generates less heat, thereby reducing the risk of fires. High-voltage power lines are more related to transmission of electricity rather than the direct causes of residential electrical fires. Finally, properly maintained equipment helps prevent electrical fires by ensuring that all electrical devices and systems are functioning correctly and safely.