FPL and FPLR are fire alarm cable ratings under the UL standard (FPLR is the riser/between-floors installation rating); PH30/PH60/PH120 indicate the time the circuit maintains integrity under flame conditions: 30 minutes, 60 minutes, and 120 minutes respectively. Selection is determined by building fire protection design requirements and installation position (horizontal/riser).
FPL / FPLR determine installation position compliance, while PH30 / PH60 / PH120 determine the duration of power and signal maintenance during a fire.
