Thhncu-generic tffn18strblk500r Tffn 18 Awg Wire 500ft

Product Description

The THHNCU-GENERIC tffn18strblk500r is a TFFN-rated, 18 AWG stranded copper building wire supplied on a 500-foot spool in black insulation. The conductor is fully annealed bare copper with a 16-strand configuration, covered by a PVC insulation layer with a nylon jacket — the construction that defines TFFN designation. Rated for 600 volts and 90 degrees C in dry environments, this wire is a standard choice for branch circuit wiring, control wiring, and fixture wiring in commercial and residential applications. Electricians and electrical contractors install this wire in conduit runs, panel feeders, and control panel builds where a flexible, small-gauge conductor is required.

TFFN 18 AWG wire is commonly used in lighting fixture wiring, low-voltage control circuits, motor control centers, and similar applications where a flexible stranded conductor in a compact gauge is specified. The 500-foot spool quantity is suited for larger jobs or shops that stock wire by the spool rather than pulling cut lengths. The black insulation color follows standard color-coding practices for phase conductors and general-purpose circuit wiring in commercial electrical installations.

Key Features

• TFFN type designation with PVC insulation and nylon jacket for flexible, compact wiring runs
• 18 AWG fully annealed bare copper conductor with 16-strand configuration for flexibility
• 600-volt rating suitable for standard branch circuit and control wiring applications
• 90 degrees C temperature rating in dry environments
• 500-foot spool length reduces splices and suits high-volume or stocking use
• 0.085-inch outer diameter for routing through tight conduit fills

Compatibility

Designed for use in dry conduit installations where TFFN or THHN-type 18 AWG stranded wire is specified for fixture wiring, control circuits, or general-purpose branch circuit wiring per applicable NEC requirements.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before pulling or terminating wire. TFFN wire is rated for dry locations only — do not install in wet or damp environments where a wet-rated conductor is required. Use appropriate conduit fill calculations per NEC Article 310 when routing alongside other conductors.

Technical Specifications

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

Standard Information

• Brand: THHNCU-GENERIC
• Manufacturer Part Number: tffn18strblk500r