Choose the conductor gauge based on the fire alarm system’s voltage-drop calculation, circuit length, current demand, and manufacturer requirements, with larger conductors such as 14 AWG generally supporting longer runs or higher loads than 16 AWG. Confirm that the cable has the required two-conductor configuration and FPLP rating for the installation space, and follow applicable codes and project specifications.

Use unshielded FPLP fire alarm cable for standard fire alarm and signal-control circuits when the system design does not call for protection from electrical interference. Choose shielded cable when the circuit runs near equipment or wiring that may introduce electromagnetic noise, or when the fire alarm manufacturer, project specifications, or applicable codes require shielding.

When routing fire alarm cables through plenum spaces, use cable marked FPLP and verify that its conductor size, pair count, and unshielded construction match the fire alarm system and installation design. Follow applicable fire and electrical codes, local requirements, and manufacturer guidance, while routing the cable with appropriate support, protecting it from physical damage, and maintaining required separation from other wiring.

FPLP and related CL3P and FT6 jacket ratings help determine whether a cable suits plenum spaces and the applicable installation requirements, while solid bare copper conductors support dependable signal and power transmission in fire alarm and smoke detector circuits. Select the conductor size, such as 14 AWG or 16 AWG, based on the system design, and use descending length markings to track remaining cable and plan material needs during installation.