FPLP Fire Alarm Cable Shielded Plenum, 18/4 AWG Solid Bare Copper Conductors, PVC Jacket, 1000 FtDescription Plenum Fire Alarm Cable for Smoke Alarms and Detectors The Shielded Plenum (FPLP) Fire Alarm Cable is the pinnacle of safety, featuring four 18 gauge solid bare copper conductors, aluminum mylar shielding, and a low smoke PVC jacket. Designed with a 24 gauge drain wire, this cable effectively shields against unwanted system noise, ensuring seamless operation when it matters most. Moreover, its sequential footage markings on the jacket