Can a duct-type smoke detector be installed outdoors? NFPA 72 allows smoke detectors to be installed outdoors as long as the detector is listed and designed for the expected conditions. When installed outdoors, the detector should be rated within the… Continue Reading
Below we have a picture of a return duct for an air handling unit in a high-rise office building. Because the duct work is wider than 36 inches, the sampling tube is penetrating the duct work. As per NFPA 72… Continue Reading
What are the requirements for supporting EMT (Electrical Metallic Tubing) when using it to install fire alarm cabling? The requirements for supporting EMT is the same as if installing 120V wiring. The NEC requires that EMT be supported withing 3… Continue Reading
NFPA 72 states that the Fire Command Center is “The principal attended or unattended location where the status of the detection, alarm communications, and control systems is displayed and from which the system(s) can be manually controlled. ” Below we have a Fire… Continue Reading
Is it required for a commercial kitchen fire suppression system to be monitored by the fire alarm system? A commercial kitchen fire suppression system works when either a cable is pulled (manually), as the video shows below, or with a… Continue Reading
Below we have a video of doors releasing upon activation of smoke detectors within the vicinity of the doors. The purpose of such action (release doors) is to help ensure the doors close to prevent smoke from spreading to other… Continue Reading
Below is a picture of an explosion proof spot-type smoke detector installed in an electrical room in a parking garage. The detector is installed as per NFPA 72 17.7.3.2.1. NFPA 72 17.7.3.2.1 – * Spot-type smoke detectors shall be located on… Continue Reading
NFPA 72 specifies the locations where, when provided, a two-way telephone communications equipment shall be installed. When provided, the telephone equipment is to be used by the fire service to communicate between an area of a building and a constantly… Continue Reading
A dedicated function fire alarm system includes an elevator recall control and supervisory control unit; where a smoke control panel would be installed to monitor smoke detection used for elevator recall. Also, a dedicated function fire alarm system used specifically… Continue Reading
The support requirements for fire alarm circuit conductors can be found in the National Electrical Code. The NEC specifies that Power-Limited Fire Alarm cables be supported to building structure using an approved method at intervals not exceeding 18 inches. Approved… Continue Reading
