Isn’t a Control Circuit (CC) really a Notification Appliance (NA) Circuit??
This blog is primarily for FA system designers, installers, AHJs and plan reviewers. If you design, install or review plans for fire alarm systems, this is a must read for you. NFPA 72, 10.17.1 states that a failure of one notification appliance circuit (NAC) shall not affect the operation of any other NAC. This was […]
Smoke Detectors and Smoke Alarms: Information for the FA designer and Property Owner
Is there a difference between a smoke detector (SD) and a smoke alarm (SA)? Yes, there is, and we are partially directed by the applicable building and/or fire code where we are to use each type. But if you care and understand what the short and long-term savings can be by choosing the correct one, […]
Smoke Alarm, Smoke Detector, The Same Thing, Right?
These are two different animals, and its important for anyone involved with life safety systems or their design, installation, service or testing to know the differences. Its not uncommon for some to call a smoke alarm a detector, and hopefully you will not be one of them after reading what follows. A smoke alarm and […]
Spontaneous Combustion and An Incident Worth Thinking About
Spontaneous Combustion and An Incident Worth Thinking About July 18, 2017 We have been using an automobile upholstering company in Lawrence, MA, for years. Good quality, attention to detail at a reasonable price. My wife and I arrived at their business at 8AM on a Monday for a scheduled appointment to repair her driver’s seat. […]
What is the Fire Alarm Panel Telling Me?
What is the Fire Alarm Panel Telling Me? July 17, 2017 How many of us have cursed when responding to a service call at a property where the fire department has reported a faulty smoke detector and found that when you arrived, the panel had been reset? I’m sure that anyone who has been in […]
All Fire Alarm NAC Wiring is Supervised, Right?
All Fire Alarm NAC Wiring is Supervised, Right? April 17, 2017 Supervision of a fire alarm notification appliance circuit (NAC) means that if an open or a short exists on a circuit, the fire alarm control unit will indicate a trouble condition until the malfunction is corrected. Right? Well, that depends. If a NAC consists […]
