3/0 THHN/THWN-2 Copper Building Wire | Stranded 600V

“The high-performance feeder standard for 200-amp commercial servicesengineered with dual-rated THHN/THWN-2 insulation and a friction-reducing nylon jacket for maximum reliability in 600V applications.”

Why Electricians Choose 3/0 THHN/THWN-2 Copper

The 3/0 AWG copper building wire is a precision feeder designed for heavy electrical demands. It is the primary choice for 200-amp commercial panels, large-scale HVAC chillers, and industrial machinery. The stranded construction is a critical advantage at this size, offering the flexibility required to pull through 2-inch or 2.5-inch conduit runs and achieve high-torque terminations in mechanical lugs.

• Dual Rated (THHN/THWN-2): Engineered for dry locations up to 90C (THHN) and wet locations (THWN-2), providing maximum versatility for indoor and outdoor conduits.

• Tough PVC/Nylon Jacket: The high-heat and moisture-resistant PVC insulation is protected by a tough, friction-reducing Nylon outer sheath, making for easier pulls through tight bends.

• High-Conductivity Copper: Manufactured with soft-annealed stranded copper to provide maximum flexibility and superior electrical conductivity for branch circuits and feeders.

• Oil & Gasoline Resistant: The specialized jacket is designed to resist chemical degradation, making it ideal for industrial environments and service station wiring.

Common 3/0 THHN/THWN-2 Applications

• 200-Amp Sub-Panels: The professionals choice for running full 200-amp power to detached workshops, garages, and commercial sub-panels.

• Commercial Building Feeders: Used to distribute high-amperage power from the main service to floor-level distribution panels.

• Large HVAC Systems: Ideal for powering massive commercial rooftop air handlers and chillers.

• Industrial Machinery: Providing stable, high-capacity power for 3-phase manufacturing equipment.

Technical Specifications

ENGINEERING OVERVIEW: 3/0 STR THHN 600V

• APPLICATION: Commercial service entrance conductors, heavy feeders, and industrial power distribution.

• VOLTAGE: Rated for 600 Volts.

• CONDUCTORS: Stranded soft-annealed copper.

• INSULATION: Heat and moisture-resistant PVC (Polyvinyl Chloride).

• JACKET: Tough, abrasion-resistant Nylon.

• TEMPERATURE: 90C Dry (THHN), 90C Wet (THWN-2).

• Ampacity: 200 amps at 75C | 225 amps at 90C

Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.