An initiating device will cover how many square feet in a zone or how many devices?

In fire alarm systems, the coverage area of an initiating device is important for ensuring proper detection and response to fire events. The correct answer refers to the maximum area that a single initiating device can effectively monitor, as well as the upper limit on the number of devices that can be installed within a defined zone.

For option C, the coverage of 20,000 square feet with a limit of 25 devices aligns with established fire safety codes and standards, such as the National Fire Protection Association (NFPA) guidelines. These guidelines outline specific requirements to ensure that fire detection systems are both effective and reliable in larger spaces. This coverage is typically based on factors like the type of occupancy, the arrangement of the space, and the anticipated fire risks.

Devices must be spaced adequately to ensure that any potential fire is detected within the appropriate response time. In larger areas, having a higher number of devices can provide redundancy and increase the likelihood of prompt detection, but there is also a point where too many devices could lead to unnecessary complications in monitoring and maintenance.

Therefore, the designated coverage area of 20,000 square feet and the limit of 25 devices effectively balances the need for thorough monitoring with practical considerations in fire alarm system design.