Which of the following is NOT a main reason for electrical fires?

The correct answer is that placing the cable on the ground is not considered a main reason for electrical fires. While improper handling of electrical cables can lead to hazards, the act of simply placing a cable on the ground does not inherently cause a fire. Electrical fires are more likely to result from factors like faulty wiring, overloaded circuits, and improper use of electrical tools, which directly increase the risk of overheating, short circuits, or creating sparks.

Faulty wiring can lead to insulation breakdown or arcing, which may ignite surrounding materials. Overloaded circuits result when too many devices draw more current than the circuit is designed to handle, potentially causing overheating. Improper use of electrical tools can create risks such as short circuits or straining the circuit beyond safe limits. Thus, those factors are primary concerns when it comes to the causes of electrical fires.