What is a common sign that a fire is related to electrical sources?

A common sign that a fire is related to electrical sources is characterized by unusual odors. Electrical fires often emit a distinct smell that can be described as burnt plastic or ozone, which is caused by the overheating of wires, insulation, or other materials. This unusual odor can serve as an early warning sign before an actual visible fire breaks out.

The presence of dark smoke is more indicative of fires involving various materials, not exclusively electrical ones. Flames near combustible materials might occur in any type of fire, while excessive heat without flame can suggest overheating in many contexts that are not solely related to electrical issues. The specific and recognizable odor associated with electrical fires is a key indicator that helps in identifying the nature of the fire source.