For both types of fire alarm cables, Art. 760 provides guidance to ensure survivability of fire alarm circuits under fire conditions. This Article states that in order to survive the fire, alarm cable ...

Fire alarm circuits in ducts, plenums, and other air-handling spaces (300.22). Fire alarm circuits in hazardous, or classified, locations (Art. 500 to 516). Building control circuits associated with ...

Honeywell Power Products recently announced the development of a new tool that helps technicians determine the voltage of a specific fire alarm’s notification appliance circuit or NAV.

Normally, the fire alarm initiating device, notification appliance and signaling line circuits are not run outside the building. When we have no choice but to run them overhead or underground ...

Smoke detector with gas sensor TGS 813 – source The simple schematic diagram of a smoke detector presented here utilizes the gas sensor TGS 813 as the main detecting component. The circuit is pretty ...

At the heart of this overhead detector (fire alarm) circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear and directly proportional output in mV, ...