Fixture Wire, Trade Designation TFFN, Wire Size 18 AWG, Wire Color Yellow, Length 500 ft, Conductor Design Stranded, Number of Conductors 1, Jacket Material Nylon, Insulation Material PVC, Nominal Outside Dia. 0.09 in, Packaging Spool, Jacket Color Yellow, Voltage 600V AC, Stranding 16 Thermoplastic flexible nylon (TFFN) fixture wire is a coated wire typically run through raceways that is specifically designed for fixture wiring. It's primarily used in commercial applications to power hardwired light fixtures in ceilings and walls. It's more flexible than THHN building wire but less resistant to heat, and it is only available in limited gauges (18 and 16 AWG).Building wire and cable carry electrical current from a power source to a device in a building, such as an outlet or light fixture.
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