In a wired system, the wiring is installed as the first line of defense against fire. The wiring will detect, convey, and control the operation of the system components. A commercial fire alarm system has two types of wires: power wires (AC) and signal wires (DC). The power wires provide electricity to all the components within the system. The signal wires communicate information between particular devices, such as sensors and control panels. https://bit.ly/3tBzeCk
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