Thhn 4 Awg Stranded Copper Wire Black 500 Foot Reel

Product Description

The thhn4strblk500r is a 4 AWG stranded copper THHN building wire rated for 600 volts and up to 90 degrees C in dry installations. The conductor is built from 19-strand copper with a PVC insulation layer and an outer nylon jacket. This combination gives the wire its THHN designation and makes it suitable for pulling through conduit in commercial and residential electrical work. Current capacity ranges from 70 amps at 60 degrees C to 100 amps at 90 degrees C, depending on the installation temperature rating. The reel contains 500 feet of black-insulated wire. Licensed electricians are the primary installers for this product in branch circuit, feeder, and service-entrance wiring applications.

This wire is used in conduit runs for branch circuits, feeder conductors, and service panels in both residential and commercial construction. The 4 AWG size is common in sub-panel feeds, large appliance circuits, and equipment branch circuits where higher ampacity is required. The 500-foot reel format is suited for larger jobs or multi-run conduit work. The black insulation color is standard for ungrounded phase conductors in most installations and aligns with NEC color convention for line-side conductors.

Key Features

• 4 AWG copper conductor with 19-strand configuration for flexibility during conduit pulls
• Dual-layer insulation: PVC over copper, nylon jacket rated for THHN service
• 600-volt rating suitable for standard building wiring applications
• 90 degrees C dry temperature rating for maximum ampacity of 100 amps
• Black PVC insulation for phase conductor identification
• 500-foot reel length reduces splicing on longer conduit runs

Compatibility

Designed for use in conduit systems as a THHN-rated building wire for residential and commercial electrical installations where 4 AWG copper conductors are specified.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Power must be de-energized and locked out at the panel before terminating conductors. THHN wire is intended for use inside conduit and is not rated for direct burial or wet locations without additional protection. Use appropriately rated lugs, breakers, and termination hardware sized for 4 AWG conductors.

Technical Specifications

• Conductor Material: Copper
• Conductor Size: 4 AWG
• Stranding: 19 Strand
• Current Rating: 70 amps (60 degrees C), 85 amps (75 degrees C), 100 amps (90 degrees C)
• Voltage Rating: 600 volts
• Temperature Rating: 90 degrees C dry
• Insulation Material: PVC
• Jacket Material: Nylon
• Insulation Color: Black
• Wire Type: THHN
• Outer Diameter: 318 mil
• Reel Length: 500 feet
• Weight: 152 pounds per 1000 feet

Standard Information

• Brand: THHN-GENERIC
• Manufacturer Part Number: thhn4strblk500r