Plenum-rated fire rated electrical cables, marked FPLP or CL3P, are designed for installation in plenum spaces used for air circulation, such as spaces above suspended ceilings. Riser-rated cables, marked FPLR or CL3R, are intended for vertical runs between floors or through riser shafts, so select the rating that matches the cable pathway and local code requirements.

Conductor gauge affects the wire’s size and electrical capacity, so select the appropriate 14, 16, or 18 AWG cable based on the system requirements, run length, and installation specifications. The conductor count determines how many signal or power paths the cable can carry, with two-conductor cables suited to simpler circuits and four-conductor cables supporting applications that require additional connections.

Fire rated electrical cables with solid copper conductors can be used for fire alarm systems, smoke and carbon monoxide detectors, sirens, security wiring, and signal control circuits. Choose plenum-rated cable for plenum spaces and riser-rated cable for vertical runs, following local codes and the requirements of the installation.

When selecting fire rated electrical cables for indoor systems, compare the cable rating, conductor gauge, conductor material, shielding, and number of conductors to match the system and building requirements. Also consider whether the cable is plenum- or riser-rated, its jacket features, sunlight resistance for applicable runs, length markings, and packaging such as reels or pull-friendly boxes.