The protected area of each hazard must include what specific area?

The correct answer highlights the necessity of focusing on the area affected by the nozzle's arc when determining the protected area of each hazard. This is crucial because the effectiveness of a dry chemical extinguishing system heavily relies on the distribution pattern of the extinguishing agent as it is expelled through the nozzle. Each nozzle is designed to project the agent in a specific arc, ensuring thorough coverage of the intended fire hazard.

By concentrating on the area influenced by the nozzle's arc, the system can effectively suppress fires before they escalate, thereby providing the best level of protection. This targeted approach is grounded in the operational principles of fire extinguishing systems that aim to maximize the efficiency and effectiveness of fire suppression efforts.

In contrast, terms such as the entire building are too broad and do not account for the specific hazards targeted by these systems. Focusing solely on the kitchen area or all electrical connections limits the scope of protection and can leave other potential fire risks inadequately covered. Thus, prioritizing the area affected by the nozzle's arc is essential for ensuring safety in environments where dry chemical extinguishing systems are deployed.