Nfpa.72

The is the ultimate arbiter of code compliance. This could be a local fire marshal, a building official, or another designated inspector. When designing a system that uses new provisions from a not-yet-adopted code, it is essential to consult with the AHJ to confirm they will accept the new approach. Federal government agencies, however, typically apply the most recently published NFPA standards at the time of contracting for design services, meaning federal projects may already require compliance with the 2025 edition.

Initiating devices are the "inputs" or sensors of the system. Chapter 17 details the selection, placement, and spacing requirements for: nfpa.72