Fire alarm cable is a specialized, high-performance, and flame-retardant cable designed to maintain circuit integrity for fire detection and signaling systems during emergencies. They are typically red-jacketed, solid or stranded bare copper, and engineered to resist fire, smoke, and electromagnetic interference in critical infrastructure.Safety Rating: Cables are generally categorized by application: FPLP (Plenum) for air ducts, FPLR (Riser) for vertical floor shafts, and standard FPL, WesBell Electronics notes.
Fire Performance: Engineered with materials that are slow-burning and, in some cases, halogen-free,, allowing systems to operate for 30–90 minutes during a fire.
Construction: Composed of bare copper conductors with special insulation, such as PVC or low-smoke zero-halogen (LSZH)