Product Overview THW 3/0 AWG copper wire is a robust single-conductor cable designed for high-current power distribution in residential, commercial, and industrial electrical systems. Manufactured with 19 strands of annealed copper and insulated with heat- and moisture-resistant PVC, this 600V-rated cable offers dependable performance in both dry and wet environments up to 75°C. Its superior ampacity and mechanical strength make it a top choice for heavy-load applications.
Applications of THW 3/0 AWG Copper Wire
- Main service and feeder installations
- Electrical panels and switchboards
- HVAC and large equipment circuits
- Underground conduit runs in buildings
- Raceway and cable tray installations
With its flexibility, high conductivity, and strong insulation, THW 3/0 is ideal for mission-critical power systems and large-scale electrical infrastructure.
Compliance and Standards
- ASTM B-3: 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: Power Cable Insulation Standards
Construction Details
- Conductor: 19-strand bare annealed copper
- Insulation: PVC thermoplastic, resistant to moisture, abrasion, and heat
- Markings: Clearly labeled with wire size, voltage rating, and THW type designation
Technical Specifications – THW 3/0 AWG Cable
- Size: 3/0 AWG
- Number of Strands: 19
- Insulation Thickness: 80 mils
- Approx. Outside Diameter: 0.616 inches
- Ampacity: 200 amps
- Approx. Weight per 1000 ft: 611 lbs
Key Advantages
- High current-carrying capacity
- Suitable for conduit and underground installation
- Strong PVC insulation provides long-term durability
- NEC and UL compliant for safety and quality
- Easy to route and handle during installation
Why Buy THW 3/0 AWG from TOT Wire & Cable? TOT Wire & Cable delivers top-quality THW 3/0 AWG copper wire at competitive prices with fast shipping and reliable service. Our cables meet all necessary safety and performance standards, making them ideal for demanding electrical projects.
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