Product Information

Specification

4/0 AWG THHN THWN-2 Stranded Copper Building Wire

Allowable Ampacity:

• 195 Amps for General Applications (60°C)

• 230 Amps in Wet Locations (75°C)

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

Description

4/0 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 reliable performance in challenging conditions. This wire is commonly used for large service entrances, feeders, and heavy-duty industrial machinery, and it 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.

What are the Applications of 4/0 AWG THHN Wire?

• Service Entrance Wires: Used in large properties and buildings.

• Main Feeder Wires: Supplying major subpanels and distribution panels.

• Large-Scale HVAC Systems: Powering commercial and industrial heating, ventilation, and air conditioning.

• Heavy-Duty Industrial Machinery: Delivering reliable power to demanding equipment.

• Underground Installations: Suitable for conduit installations when double-rated as THWN.

• Power Distribution: Used in large factories, multi-building residential complexes, and campuses.

Also Known As

4/0 gauge copper wire, THHN #4/0 wire, 4/0 stranded copper building wire, 4/0 gauge stranded wire, 4/0 conduit wire, 4/0 nylon-insulated copper wire, 4/0 THHN wire, 4/0 THHN/THWN-2 wire, 4/0 thermoplastic high heat-resistant wire, 4/0 PVC-coated wire, 4/0 nylon-jacketed wire, 4/0 AWG THHN stranded wire by the foot, 4/0 AWG THHN stranded wire 500 ft, 4/0 annealed copper stranded wire, insulated copper wire.

Construction of THHN 4/0 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 4/0 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 4/0 AWG THHN Wire

• Size (AWG): 4/0

• Weight per 1,000 ft: 710 lbs

• Outside Diameter: 0.660 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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