A potential ignition source in a workplace is described as any object, equipment, or occurrence that can produce enough heat or energy to ignite flammable materials or substances. This includes things that generate heat, sparks, flames, or electrical charges capable of causing combustion. Ignition sources may be thermal (such as hot surfaces, flames, or welding equipment), electrical (like sparks from faulty wiring or static electricity), mechanical (friction or sparks from machinery), or chemical (exothermic reactions) in nature. Even small sparks or embers that reach temperatures over 100°C can ignite flammable materials if they come into contact. In risk assessment contexts, a potential ignition source is typically classified as a hazard or fire hazard because it poses a risk of fire or explosion if it interacts with flammable substances or gases in the workplace environment.