Fire Alarm 18/2 Bare Copper 18AWG 2 Conductor Unshielded Cable - 1000 Feet, Red This product features a shielded 100% Bare Copper 18/2 shielded fire alarm cable. The fire alarm cable is composed of 2/18 gauge wires shielded with an aluminum Mylar layer inside of a FPLR rated outer jacket. The primary use for this cable is for power limited fire circuits, but can also be used in wiring security systems(FPLR/CL2R/CMR C(UL)US CMG FT4). Power limited circuit cable communications cable. Cable Conductor Material: 100% Bare Copper Cable Gauge: 18AWG Cable Length: 1000 feet