Southwire 20499001 Thhn Thwn 4 Awg 70A Building Wire

Product Description

The SOUTHWIRE 20499001 is a 4 AWG stranded copper building wire rated for THHN and THWN applications at 600 volts and 70 amps. It features a black thermoplastic insulation with a nylon jacket, making it suitable for use in conduit in both dry and wet locations. The 19-strand copper core provides flexibility during pull-in, reducing the effort required in long conduit runs. Licensed electricians and electrical contractors install this wire in commercial and residential construction, service panel feeders, branch circuits, and equipment connections where a durable, code-compliant conductor is required.

This wire is sold in 1-foot increments with a 250-foot minimum cut length and ships from a 500-foot coil. It is used in conduit or raceway installations in residential, commercial, and light industrial settings. Common applications include feeder runs to subpanels, motor branch circuits, and general-purpose wiring in electrical panels and junction boxes. The nylon jacket adds abrasion resistance, which is especially useful in tight conduit pulls or installations near machinery.

Key Features

• 4 AWG stranded copper conductor with 19 strands for flexibility
• Rated 70 amps at 600 volts for feeder and branch circuit use
• Black thermoplastic insulation with nylon jacket
• Dual-rated THHN and THWN for dry and wet location conduit use
• Resistant to abrasion, heat, moisture, oil, gasoline, and sunlight
• Meets UL 83, UL 1063, CSA, RoHS, and Federal Specification A-A-59544

Compatibility

Designed for use in conduit or raceway systems where THHN or THWN-rated conductors are specified by code. Suitable for residential, commercial, and light industrial electrical installations requiring a 4 AWG copper feeder or branch circuit conductor.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize the circuit and verify the absence of voltage before making terminations or pulling wire into an energized conduit system. Use appropriate wire-pulling lubricant for long runs or conduit with multiple bends. Minimum order quantity is 250 feet; plan cut lengths accordingly before ordering.