Product Information

Specification

4 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 70 Amps for General Applications (60°C)

• 85 Amps in Wet Locations (75°C)

• 95 Amps in Dry Locations (90°C)

Description

4 AWG THHN/THWN-2 stranded copper wire is a durable and versatile solution for residential, commercial, and industrial electrical wiring. Rated for THHN (thermoplastic high heat-resistant nylon, dry) and THWN-2 (wet) environments, it supports up to 600 volts and operates at temperatures up to 90°C. Its flame-retardant PVC jacket resists sunlight, moisture, and chemicals, making it ideal for feeders, subpanels, and large equipment wiring.

Applications for 4 AWG THHN Wire

4 AWG THHN wire, with a capacity of up to 95 amps, is suitable for:

• Residential Feeders: Distributing power to outbuildings or different sections of larger homes.

• Commercial Subpanels: Powering medium-sized commercial buildings or complexes.

• Large Equipment Wiring: Supporting HVAC systems and sizable machinery in light industrial or commercial setups.

• Motor Connections: Reliable for connecting motors in commercial and industrial environments.

• Service Entrance: Configured for service entrances when appropriately protected.

• Conduit Systems: Easily pulled through conduit in structured wiring installations.

• Branch Circuits: Distributing power to appliances, outlets, and lighting fixtures.

Also Known As

4 AWG THHN wire, 4 stranded THHN wire, 4 gauge stranded wire, 4 copper wire, 4 AWG stranded copper wire, 4 AWG conduit wire, 4 AWG nylon wire, 4 AWG thermoplastic-insulated copper wire, 4 AWG THHN/THWN-2 wire, 4 stranded copper building wire.

Construction of THHN 4 AWG Stranded Wire

• Conductor:
  Flexible annealed soft copper per ASTM B3 and ASTM B8.

• Insulation:
  Durable, flame-retardant PVC jacket that resists sunlight and is lead-free.

• Outer Jacket:
  Abrasion-resistant nylon coating for smooth pulls through conduits.

Standards for THHN/THWN-2 4 AWG Wire

• ICEA S-73-532

• UL 1277 (Resistant to flame, moisture, and sunlight)

• UL 1581, UL 83, UL 1063, UL 758

• ASTM B3 and B8 conductor standards

• ANSI/NFPA 70 for Safe Electrical Design and Installation

• RoHS compliant

• Approved for NEC Class I and II systems and Division 2 hazardous locations

• Allowed for Exposed Run (ER) and complies with NEC regulations

• Complies with A-A59544 specifications for durability and safety

Specifications of 4 AWG THHN Wire

• Size (AWG): 4

• Weight per 1,000 ft: 155 lbs

• Outside Diameter: 0.330 inches

• Conductors: Annealed Soft Copper per ASTM B3 and ASTM B8

• Number of Strands: 19

• Insulation: PVC

• Insulation Thickness (mils): 40

• Nylon Thickness (mils): 6

• Jacket: PVC

*Data provided on this page is subject to change based on different manufacturers' variances

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