Which NFPA 72 table provides Time Constant and Response Time Index for detectors?

Which NFPA 72 table provides Time Constant and Response Time Index for detectors?

• A. Table 17.6.2.1
• B. Table 14.4.7
• C. Table B.3.2.5
• D. Table 24.8.17

Answer: (C)

Time Constant and Response Time Index describe how quickly a detector responds to a fire signal, and NFPA 72 keeps this detector performance data in a specific table located in Annex B. That table provides the Time Constant and RTI values for different detector types, which engineers use to compare and select detectors based on how fast they are expected to respond in a given hazard. The other tables listed come from different parts of the standard and cover topics unrelated to detector response data, so they don’t provide the Time Constant and RTI information for detectors.

Time Constant and Response Time Index describe how quickly a detector responds to a fire signal, and NFPA 72 keeps this detector performance data in a specific table located in Annex B. That table provides the Time Constant and RTI values for different detector types, which engineers use to compare and select detectors based on how fast they are expected to respond in a given hazard. The other tables listed come from different parts of the standard and cover topics unrelated to detector response data, so they don’t provide the Time Constant and RTI information for detectors.