A single wire break shouldn't take down half your building's fire protection. But whether it does, or doesn't, comes down to one design decision made long before the system is ever switched on: Class A or Class B wiring. Both are legitimate ways to wire a fire alarm signaling line circuit (SLC). Neither is universally…

Imagine a fire panel that doesn't just flash "zone 2" and leave you guessing. It tells you "smoke detector, room 214, north stairwell," pointing you straight to the spot in seconds. That's the kind of precision a well-wired system delivers, and it's a game changer for how quickly a building can respond. That level of…