Product Information

Specification

1/0 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 125 Amps for General Applications (60°C)

• 150 Amps in Wet Locations (75°C)

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

Description

1/0 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 and 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 challenging conditions. Commonly used for power distribution, branch circuits, and conduit installations, 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 1/0 AWG THHN Wire

1/0 AWG THHN wire is ideal for circuits up to 150 amps in:

• Large Service Entrances and feeders to subpanels.

• Commercial HVAC Systems and heavy-duty industrial equipment.

• Boilers and EV charging stations.

• Lighting Systems in industrial and commercial setups.

• Underground Installations and power distribution in large facilities.

Also Known As

1/0 gauge copper wire, THHN #1/0 wire, 1/0 stranded copper building wire, 1/0 gauge stranded wire, 1/0 conduit wire, 1/0 nylon-insulated copper wire, 1/0 THHN wire, 1/0 THHN/THWN-2 wire, 1/0 thermoplastic high heat-resistant wire, 1/0 PVC-coated wire, 1/0 nylon-jacketed wire, 1/0 AWG THHN stranded wire by the foot, 1/0 AWG THHN stranded wire 500 ft, 1/0 annealed copper stranded wire, insulated copper wire.

Construction of THHN 1/0 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 1/0 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 1/0 AWG THHN Wire

• Size (AWG): 1/0

• Weight per 1,000 ft: 370 lbs

• Outside Diameter: 0.500 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

** Images are for display purposes only refer to Product Technical Details for accurate information on the product.

In the case the material only comes in a predetermined color or doesn’t come with any color