What is required to automatically actuate the extinguishing system in each protected area?

The requirement to automatically actuate a dry chemical extinguishing system in each protected area is specifically tied to the use of a listed fire detection device as specified in the manufacturer's manual. This ensures that the device is reliable, meets prescribed safety standards, and is appropriate for the particular extinguishing system in use.

Listing refers to the verification and approval that the device has undergone rigorous testing to confirm its performance capabilities under various conditions, making it a suitable choice for effectively detecting fires. By following the manufacturer's specifications, the extinguishing system can be seamlessly integrated with the detection equipment, ensuring that the system activates promptly and accurately when a fire is detected.

In contrast, utilizing a generic smoke detector, a manual-only system, or any common fire alarm device would not meet the specific safety and compliance standards set by the NFPA 17. These alternatives may lack the necessary reliability, compatibility, and certification crucial for the correct functioning of the extinguishing system. Hence, the correct integration of a listed fire detection device is paramount for ensuring the system's effective performance.