Master Electrician Teaches Son about Commercial Fire Alarm Electrical, and the wiring, Thoughts?

You know what kind of wire you would use for the fire alarm? >> It's like small like How many conductors in the cable? Uh two? Two. Only two. Like 18 two or red and a black. It's a black and a white usually. Plenum rated wire. Yeah. And [music] you can feed that in there and that'll go right into normally open or normally closed? It's uh it's open. Normally open. [music] Right? Because when this trips, we want that to close and we want the fire alarm to know. So, when you put in a fire alarm wire, it stays open. Yeah. If you put them together, what happens? >> [music] >> Close. If I took a fire alarm cable on a zone and I put it together on the end, what what happened? Trigger it? Yeah. You trigger it. I would know that cuz residential the hardwired smoke detector was two wires. Yeah, but that's different. Residential Oh, you're talking Yeah, it's usually there's a wire in and a wire out. We'll go over that later. But, any questions? Nah, I think that's We got to get this guy a price.