Southwire 20490912 Thhn Thwn 8 Awg 40A Building Wire

Product Description

The SOUTHWIRE 20490912 is a single-conductor, 8 AWG stranded copper building wire rated for THHN and THWN applications at 600 volts and 40 amps. The conductor is made up of 19 strands of copper, wrapped in thermoplastic insulation and a nylon jacket, giving it solid resistance to abrasion, heat, moisture, oil, and gasoline. This wire is sold in 1-foot increments with a 250-foot minimum cut length from a 500-foot coil. The red jacket color aids in circuit identification during rough-in and final wiring. It is installed by licensed electricians in commercial and residential electrical systems where NEC-compliant branch circuit or feeder wiring is required.

This wire is suited for use in conduit in dry or wet locations. Its THHN rating makes it appropriate for dry and damp indoor environments, while the THWN rating extends use to wet locations. It is commonly pulled through EMT, rigid metal, or PVC conduit in residential, commercial, and light industrial wiring projects. The red jacket is frequently used to identify specific phase or circuit assignments on job sites following standard color-coding conventions.

Key Features

• 8 AWG stranded copper conductor with 19-strand configuration for flexibility during pull-through
• Dual-rated THHN and THWN for use in both dry and wet conduit installations
• 600-volt rating at 40 amps for branch circuit and feeder applications
• Nylon jacket provides resistance to abrasion, gasoline, oil, heat, and moisture
• Red thermoplastic insulation supports job-site circuit identification
• Meets ASTM specifications, CSA, UL 83, UL 1063 (MTW), Federal Specification A-A-59544, and is RoHS compliant

Compatibility

Designed for use in standard conduit systems where THHN or THWN single-conductor building wire is specified for branch circuit or feeder wiring in residential, commercial, or light industrial applications.

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 making any connections. Pull this wire through conduit using appropriate wire-pulling lubricant to avoid jacket damage, especially on longer runs or tight bends. Do not exceed the conductor's rated ampacity or voltage when sizing for the intended circuit.