What is the main cause of electrical fires in residential buildings?

The main cause of electrical fires in residential buildings is accurately identified as faulty wiring, overloaded circuits, and improper use of extension cords. Faulty wiring can arise from a variety of issues, such as outdated systems, wear and tear, or installation mistakes, which can lead to short circuits or arcing—common ignition sources for electrical fires. Overloaded circuits occur when too many devices draw power from a single circuit, which can cause overheating and potential fires. Additionally, the improper use of extension cords, such as daisy chaining them or using them for permanent wiring, can create hazardous conditions that increase the risk of fire.

Other options present potential fire hazards but are not as significant contributors to electrical fires. Overloading light fixtures with too many bulbs or using appliances that overheat can certainly pose risks; however, they are typically less prevalent causes compared to the broader systemic issues of wiring and circuit management. Likewise, improperly installed ceiling fans can lead to installation-related hazards, but they do not encompass the comprehensive risks associated with circuit overload and faulty wiring.