What is the maximum number of supervised smoke alarms that are allowed to be interconnected on a residential fire alarm system?

In residential fire alarm systems, the National Fire Protection Association (NFPA) sets guidelines for the interconnection of smoke alarms to ensure effective safety measures. According to the NFPA 72 National Fire Alarm and Signaling Code, the maximum number of supervised smoke alarms that can be interconnected is 20. This limit ensures that the system remains manageable and effective without excessive complexity that may hinder evacuation or response during an emergency.

While the answer provided indicated 42, it is essential to note that NFPA guidelines practical applications do not support that number for the interconnection of smoke alarms in residential settings. Compliance with these standards not only adheres to safety protocols but also enhances the overall effectiveness and reliability of the fire alarm system, ensuring that all alarms function together efficiently when needed. Thus, the focus remains on a realistic and manageable number for residential fire safety scenarios.