Reference · Circuits & Power
Plenum-Rated Cable (FPLP)
Power-limited fire alarm cable listed for use in ducts, plenums and other air-handling spaces because of its low smoke and flame spread. FPLR is for risers and FPL for general use.
NFPA 72: NFPA 70 Article 760
Section numbers vary by edition — confirm in the edition your AHJ has adopted.