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THHN Building Wire 300 MCM AWG Black

THHN Electrical Building Wire. 600 volt, Stranded Copper, Click for Quantity Discount, Min Purchase 15 ft.
  • Buy 100 for $4.58 each and save 4%
  • Buy 500 for $4.51 each and save 5%
  • Buy 1000 for $4.44 each and save 7%

Priced & sold by the foot, the minimum purchase for this item is 15 ft.


  • General purpose wiring for new construction or modernizing existing systems. Suitable for lighting and power in residential, commercial and industrial buildings. Also recommended for power control circuits, machine tools, appliances and relay panels. The overall nylon jacket is abrasion-resistant with slippery surface, for easy pulling in conduits. Highly resistant to acids, alkalis, chemicals, oil, gasoline, grease, and flame.
    • 37 Strand
    • 0.73" O.D.
    • Voltage: 600 Volts
    • Temperature: 90ðc Dry
    • Conductor: Solid, Class B or C stranded, annealed copper per UL 83.
    • Insulation: Polyvinyl chloride (PVC) sheathed with nylon meeting the requirements of UL 83 and for 105ðC Appliance Wiring Material.
    • Standards: Meets the requirements of UL 83. Conforms to Federal Specification J-C-30B. Sizes 1/0 and larger are marked "For CT Use" and are sunlight resistant (black only)
    • 320 Amp Rated
    • Ampacity: Based on not more than three conductors in raceway or cable or earth with an ambient temperature of 30ðC per NEC Table 310-16

    Other colors may be available for purchase. Please call or email for availability.

    Note: This wire is shipped directly from the manufacturer. It is not available for pick up at the store. Pricing may vary from the retail store price.

    Sold by the Foot. 100 FT minimum.

    Please be sure of your purchase - At our discretion, cut or measured purchases may not be returnable or may be subject to up to a 25% restocking fee. Also, any shipping charges (including return shipping or Delivery Intercept fees) incurred are non-refundable.
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California Residents: WARNING Proposition 65

(This item manufactured prior to August 31, 2018)

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