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This is 10-gauge solid copper building wire with dual THHN/THWN-2 rating, so it works in dry and wet locations and is rated to 90°C and 600 volts. Its 30-amp ampacity at 60°C, 75°C and 90°C makes it the standard choice for 30-amp circuits such as dryers, water heaters and subpanels run in conduit. Solid copper holds shape and takes terminations firmly, but it is stiffer to pull than stranded wire and needs conduit or raceway rather than direct burial. It is a commodity item, so the differences between brands come down to insulation quality and how cleanly the wire pulls.
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Lowest price we've seen: $13.97 on Nov 9 at Amazon. Tracked across 2 stores since Nov 9.
Buyers rate this wire highly and mostly mention that it arrived as described and pulled cleanly through conduit. Complaints are few and center on stiffness and packaging of longer runs.
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10 AWG THHN THWN-2 Copper Solid Building Wire
Allowable Ampacity:
30 Amps at 60ºC / 30 Amps at 75ºC / 30 Amps at 90ºC
Also Known As:
10 THHN, 10 AWG THWN-2, 10 AWG THHN, 10 Solid THHN, 10 Gauge Solid Wire, 10 Copper Wire, 10 AWG Solid Copper Wire, 10 AWG Copper Wire, 10 AWG Building Cable, 10 AWG Conduit Wire, 10 AWG Nylon Wire, 10 AWG Construction Cable, 10 AWG Thermoplastic-Insulated Copper Wire.
Description
THHN stands for Thermoplastic High Heat-Resistant Nylon . Recognized for its versatility and durability, it is one of the most commonly used building cables. The double marking THHN / THWN-2 means it is suitable for wet and dry conditions (the "W" indicates water-safe). This cable is corrosion-resistant, tolerates dryness and chemicals, and is rated for up to 90°C in both wet and dry environments. It operates at up to 600 volts , making it reliable for a range of applications.
Why Solid Wire?
Provides consistent, low-resistance conductivity for permanent installations.
Simplifies connections to switches, outlets, and breakers.
Best suited for stable environments with minimal movement.
Common Uses for 10 AWG Solid Wire
Residential Appliances: Suitable for medium-duty appliances like electric ovens and water heaters.
HVAC Systems: Supports smaller residential or light commercial systems.
Lighting Circuits: Reliable for residential and commercial lighting.
Conduits: Designed for structured wiring with straight conduit runs.
Branch Circuits: Distributes power from service panels to outlets, switches, and fixtures.
Construction
Conductor:
Made of annealed soft copper, meeting ASTM B3 and ASTM B8 standards.
Insulation:
PVC insulation with a flame-retardant, sunlight-resistant, lead-free thermoset jacket. The jacket is color-coded as per ICEA Method 4 for easy identification.
Standards
