What is NOT one of the four main categories of workplace hazards?

In the context of workplace hazards, the four main categories typically include biological, chemical, physical, and ergonomic hazards. Biological hazards involve exposure to living organisms that can cause health issues, such as bacteria and viruses. Chemical hazards relate to substances that can cause harm through various means, such as toxicity or flammability. Ergonomic hazards stem from poorly designed workspaces or repetitive tasks that can lead to musculoskeletal injuries.

While electrical hazards are significant and must be addressed in workplace safety, they fall under the broader category of physical hazards. Therefore, electrical hazards are not typically considered one of the four main categories of workplace hazards, which is why identifying them as separate is accurate in this instance.