Product Overview THW 4/0 AWG copper wire is a heavy-duty single conductor building wire engineered for high-capacity power distribution in industrial, commercial, and large-scale residential installations. Featuring a 19-strand soft-drawn bare copper conductor insulated with a robust layer of heat- and moisture-resistant PVC, this cable is rated for 600 volts and designed for use in both wet and dry environments with a maximum operating temperature of 75°C.
Applications of THW 4/0 AWG Copper Wire
- Main feeders for large electrical panels
- Service entrance cable for high-demand circuits
- Motor and HVAC equipment wiring
- Substations and switchgear installations
- Conduit, raceway, and duct installations
The exceptional ampacity and rugged construction of THW 4/0 make it ideal for high-load applications that require safe, efficient, and durable electrical transmission.
Compliance and Standards
- ASTM B-3: Soft Annealed Copper Wire
- ASTM B-8: Concentric-Lay-Stranded Copper Conductors
- UL 83: Thermoplastic-Insulated Wires and Cables
- NEMA WC-5 / ICEA S-61-402: Standard for Thermoplastic-Insulated Power Cable
Construction Details
- Conductor: 19-strand bare annealed copper
- Insulation: Thermoplastic PVC, rated for 75°C, resistant to oil, sunlight, and moisture
- Markings: Printed with wire gauge, voltage, and THW identification per UL and NEC
Technical Specifications – THW 4/0 AWG Cable
- Size: 4/0 AWG
- Number of Strands: 19
- Insulation Thickness: 80 mils
- Approx. Outside Diameter: 0.672 inches
- Ampacity: 230 amps
- Approx. Weight per 1000 ft: 757 lbs
Key Benefits
- High ampacity performance for large electrical systems
- Superior flexibility for easier pulling and installation
- Durable insulation for harsh environments
- Complies with UL, NEC, and NEMA standards
- Versatile use in commercial and industrial settings
Why Choose TOT Wire & Cable TOT Wire & Cable offers THW 4/0 AWG copper wire at competitive prices with dependable quality and fast delivery. We support electrical contractors, distributors, and project managers with reliable stock, expert support, and nationwide service.
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