When smoke detectors are interconnected, what is the resulting behavior?

When smoke detectors are interconnected, what is the resulting behavior?

• A. Only the first detector sounds
• B. Some alarms sound
• C. No alarms sound
• D. All alarms sound

Answer: (D)

Interconnected smoke detectors share an alarm signal across a common interconnect line, so when one detector senses smoke, it activates and sends a signal to all the others. Each connected unit responds to that signal by sounding its horn, causing every detector on the network to alarm. This maximizes the chance that occupants hear the alert no matter where they are in the building. Hard-wired and many wireless interconnect systems use this behavior, ensuring the entire network alerts simultaneously.

Interconnected smoke detectors share an alarm signal across a common interconnect line, so when one detector senses smoke, it activates and sends a signal to all the others. Each connected unit responds to that signal by sounding its horn, causing every detector on the network to alarm. This maximizes the chance that occupants hear the alert no matter where they are in the building. Hard-wired and many wireless interconnect systems use this behavior, ensuring the entire network alerts simultaneously.