Which ignition source can cause fires in hazardous areas?

Mechanical friction is a significant ignition source that can lead to fires in hazardous areas. When two surfaces come into contact and rub against each other, they can generate enough heat from the friction to ignite flammable substances in the vicinity. This can occur in various industrial settings where machinery or equipment operates, and ensuring proper maintenance and the use of suitable materials can help mitigate this risk.

In contrast, cold eruption and impedance do not directly correlate with ignition sources in environments with flammable materials. Static extraction, while related to static electricity, does not generally serve as a direct terminus for ignition in the way that mechanical friction does since it involves the removal of static charge rather than the generation of heat through contact. Understanding the specific mechanisms that lead to fire hazards helps in developing robust safety protocols to prevent ignition in hazardous areas.