Greg Kessinger is SD&I’s fire alarm and codes expert and a regular contributor. Email him your fire & life safety questions at [email protected]. Have you ever made an embarrassing mistake that was ...

Are you really maintaining your fire alarm system? Fire alarm systems are expected to help protect people, property, and assets. But you can’t tell if they’re fully operational just by looking at them ...

This is a simple fire alarm circuit using Germanium Diode and 555 timer. In this circuit Germanium Diode plays very important role in detecting the fire.This is a simple fire alarm circuit using ...

Courtesy of www.MikeHolt.com. All questions and answers are based on the 2023 NEC. Q1: Fire alarm circuit cables and conductors installed exposed on the surface of ceilings and sidewalls shall be ...