Product Information

Specification

3 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 85 Amps for General Applications (60°C)

• 100 Amps in Wet Locations (75°C)

• 115 Amps in Dry Locations (90°C) (for derating purposes only).

Description

3 AWG THHN/THWN-2 stranded copper wire is rated for THHN (thermoplastic high heat-resistant nylon, dry) and THWN-2 (wet) applications. The "W" indicates water resistance, making it suitable for damp environments when installed in conduit. It supports up to 600 volts and operates at temperatures up to 90°C. The flame-retardant PVC jacket resists sunlight, moisture, and chemicals, ensuring durability in demanding conditions. Commonly used for high-current circuits, branch wiring, and conduit systems, this wire is available in lengths of 25 ft, 50 ft, 100 ft, 250 ft, and 500 ft, as well as by the foot for custom orders.

Applications for 3 AWG THHN Wire

3 AWG THHN wire is ideal for circuits requiring up to 100 amps in:

• Residential Wiring: Large subpanels, distribution boards, and high-current circuits up to 100 amps.

• Commercial Wiring: Supplying power to large equipment, retail spaces, and offices.

• Industrial Applications: High-current circuits powering motors, machinery, and heavy equipment.

• Lighting Systems: Supporting multiple high-capacity fixtures in industrial and commercial spaces.

• Conduit Installations: Designed for wet or dry locations when run through conduits.

• Branch Circuits: Distributing power from circuit breakers to heavy-duty devices or equipment.

Also Known As

3 gauge copper wire, THHN #3 wire, 3 stranded copper building wire, 3 gauge stranded wire, 3 conduit wire, 3 nylon-insulated copper wire, 3 THHN wire, 3 THHN/THWN-2 wire, 3 thermoplastic high heat-resistant wire, 3 PVC-coated wire, 3 nylon-jacketed wire, 3 AWG THHN stranded wire by the foot, 3 AWG THHN stranded wire 500 ft, 3 annealed copper stranded wire, 3 CU THHN THWN-2, 3 CU Building Wire, 3 Black Stranded CU SIMpull THHN Wire.

Construction of THHN 3 Gauge Stranded Wire

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

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

• Outer Jacket:
  A tough, abrasion-resistant nylon jacket.

Standards for THHN/THWN-2 3 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 3 AWG THHN Wire

• Size (AWG): 3

• Weight per 1,000 ft: 190 lbs

• Outside Diameter: 0.360 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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