Electrical equipment must be designed to be fire safe in which scenario?

Electrical equipment must be designed to be fire safe in the presence of flammable gases or vapors due to the high risk of ignition these materials pose. In environments where flammable gases or vapors are present, even a small spark or heat generated by electrical equipment can ignite these substances, leading to potentially catastrophic explosions or fires. Therefore, it is crucial for equipment to have features such as explosion-proof enclosures, proper grounding, and other safety measures to minimize the risk of ignition.

While combustible dust, electrical overloads, and moisture are all concerns that can lead to electrical or fire hazards, the specific risks associated with flammable gases or vapors are heightened and require more stringent design considerations. Equipment in these environments must meet strict safety standards to prevent ignition, considering the lower ignition temperatures and the higher risk factors associated with volatile substances in the air.