Which NFPA standard is commonly associated with fire protection symbols used in system drawings?

• A. NECA 100
• B. NFPA 72
• C. NFPA 170
• D. NFPA 101

Answer: (C)

NFPA 170, the Standard for Fire Safety Symbols, is the reference that defines the symbols used on system drawings for fire protection. It standardizes the graphical icons for equipment and actions like alarms, detectors, sprinklers, and extinguishing devices, so everyone—designers, installers, and inspectors—reads the drawings the same way. This consistency reduces confusion and helps ensure quick, accurate interpretation across different teams and jurisdictions. The other standards focus on different aspects: NFPA 72 handles fire alarm signaling requirements, NFPA 101 covers life safety provisions, and NECA 100 relates to electrical construction documentation, not symbol conventions.