THW 8 AWG copper wire is a high-performance building wire designed for power and lighting circuits across residential, commercial, and industrial installations. Made of stranded soft-annealed copper and insulated with durable thermoplastic (PVC), this 8 gauge THW wire meets stringent industry standards and is rated for 600V and 75°C operation in both wet and dry environments.
Applications – 8 AWG THW Copper Building Wire
This THW 8 copper wire is widely used in:
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Branch circuits in homes, buildings, and commercial facilities
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Industrial wiring applications
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Power distribution in conduit or raceways
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Control panels and feeder systems
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Indoor and outdoor electrical systems
Approved for use in wet locations, dry locations, and direct burial where applicable, this 8 AWG THW wire is fully compliant with the National Electrical Code (NEC).
Construction – Cable THW 8 AWG
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Conductor: 7-strand soft-drawn annealed copper, bare or tinned, per ASTM B-3, B-8, B-33
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Insulation: Flame-retardant PVC (polyvinyl chloride) thermoplastic insulation, black
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Identification: Surface-printed with manufacturer info, voltage rating (600V), conductor size (8 AWG), and UL Type THW
Technical Specifications – THW 8 Gauge Wire
| Parameter | Specification |
|---|---|
| Conductor Size | 8 AWG |
| Stranding | 7-strand annealed copper |
| Insulation Thickness | 45 mils |
| Outer Diameter (O.D.) | 0.232 inches |
| Voltage Rating | 600 Volts |
| Max Operating Temp. | 75°C (wet or dry conditions) |
| Ampacity (NEC 310.16) | 50 Amps |
| Approx. Weight per 1000 ft | 69.2 lbs |
Features – 8 AWG THW Copper Wire
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Excellent conductivity and thermal stability
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Resistant to moisture, heat, and physical abrasion
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UL 83 listed, compliant with NEC and NEMA WC-5 standards
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Easy installation due to flexible 7-strand design
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Suitable for commercial, residential, and industrial wiring
Standards & Certifications
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ASTM B-3: Soft or annealed copper wire
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ASTM B-8: Stranded copper conductors
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UL 83: PVC insulated wires and cables
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NEMA WC-5 / ICEA S-61-402: Thermoplastic-insulated wire standards

