Product Information

Specification

3/0 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 165 Amps for General Applications (60°C)

• 200 Amps in Wet Locations (75°C)

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

Description

3/0 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 or wet 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 service entrances, main feeders, and heavy-duty equipment, 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 lengths.

What are the Applications of 3/0 AWG THHN Wire?

• Serves as a service entrance wire for large residential buildings.

• Powers main feeder wires to large subpanels in commercial and industrial systems.

• Supports large HVAC systems in commercial facilities.

• Operates heavy-duty electrical machinery in industrial setups.

• Suitable for underground installations when double-rated as THWN and run in conduit.

• Ensures reliable power distribution in large facilities and campuses.

Also Known As

3/0 gauge copper wire, THHN #3/0 wire, 3/0 stranded copper building wire, 3/0 gauge stranded wire, 3/0 conduit wire, 3/0 nylon-insulated copper wire, 3/0 THHN wire, 3/0 THHN/THWN-2 wire, 3/0 thermoplastic high heat-resistant wire, 3/0 PVC-coated wire, 3/0 nylon-jacketed wire, 3/0 AWG THHN stranded wire by the foot, 3/0 AWG THHN stranded wire 500 ft, 3/0 annealed copper stranded wire.

Construction of THHN 3/0 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 3/0 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 3/0 AWG THHN Wire

• Size (AWG): 3/0

• Weight per 1,000 ft: 570 lbs

• Outside Diameter: 0.600 inches

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

• Number of Strands: 19

• Insulation: PVC

• Insulation Thickness (mils): 50

• Nylon Thickness (mils): 7

• Jacket: PVC
  
  

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

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