Thhncu-generic tffn18strgry500r Tffn 18 Awg Wire 500ft

Product Description

The THHNCU-GENERIC tffn18strgry500r is a single-conductor TFFN-rated wire built for low-voltage control and fixture wiring in dry environments. The conductor is 16-strand, fully annealed bare copper at 18 AWG, insulated with PVC and a nylon jacket for abrasion resistance. Rated at 600 volts and 90 degrees C in dry conditions, this wire meets the TFFN designation requirements for use in conduit, raceways, and fixture wiring applications. The 500-foot spool format suits both shop stock and field installation work. Licensed electricians and HVAC technicians are the primary installers.

TFFN 18 AWG wire is widely used in residential and light commercial electrical and HVAC control wiring. Common applications include fixture whips, motor control circuits, low-voltage branch circuits in conduit, and general-purpose wiring in dry indoor locations. The gray insulation color supports color-coded wiring schemes and is easy to identify in multi-conductor installations. The 500-foot spool length is practical for panel rooms, equipment rooms, and conduit pulls where moderate wire quantities are needed.

Key Features

• 18 AWG fully annealed bare copper conductor with 16-strand construction for flexibility
• PVC insulation with nylon jacket — TFFN-rated for dry locations
• 600-volt rating suitable for standard branch circuit and control wiring
• 90 degrees C dry temperature rating for warm equipment environments
• Gray insulation for color-coded wiring identification
• 500-foot spool minimizes splices on longer conduit runs

Compatibility

Designed for use in conduit, raceways, and listed fixture assemblies where TFFN or THHN single-conductor wire is specified for dry locations at 600 volts or less.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize all circuits before terminating or splicing conductors. TFFN wire is rated for dry locations only — do not install in wet or damp locations without a wire type rated for those conditions. Use appropriate conduit fill calculations per NEC Article 310 when pulling multiple conductors through a single raceway.

Technical Specifications

• Conductor Material: Fully Annealed Bare Copper
• Conductor Size: 18 AWG
• Stranding: 16 Strand
• Number of Conductors: 1
• Insulation Material: PVC with Nylon Jacket
• Wire Type: TFFN
• Voltage Rating: 600 volts
• Temperature Rating: 90 degrees C (Dry)
• Insulation Color: Gray
• Outer Diameter: 85 mil (0.085 inches)
• Spool Length: 500 feet

Standard Information

• Brand: THHNCU-GENERIC
• Manufacturer Part Number: tffn18strgry500r