1 Technical Specifications
| Product Identification | |
| Product Type | THHN / THWN-2 Building Wire |
| AWG Size | 12 AWG |
| Standard | UL 83, UL 1063 (MTW), ASTM B3/B8 |
| Certification | UL Listed, CSA, RoHS |
| Conductor | |
| Conductor Material | Soft annealed bare copper |
| Conductor Type | Stranded Class B (19 strands) / Solid |
| Conductor Diameter (Stranded) | 2.35 mm (19 × 0.47 mm) |
| Conductor Diameter (Solid) | 2.05 mm |
| Max. DC Resistance at 20°C | ≤ 5.21 Ω/km (stranded) |
| Insulation & Jacket | |
| Insulation Material | PVC (Polyvinyl Chloride) |
| Insulation Thickness | 0.38 mm (0.015 inch) |
| Jacket Material | Nylon (Polyamide) |
| Jacket Thickness | 0.10 mm (0.004 inch) |
| Overall Diameter (Stranded) | 3.5 mm (0.140 inch) |
| Overall Diameter (Solid) | 3.05 mm (0.120 inch) |
| Available Colors | Black, White, Red, Blue, Green, Yellow, Gray, Brown, Orange, Violet, Pink |
| Electrical Ratings | |
| Rated Voltage | 600V |
| Temperature Rating (THHN) | 90°C Dry / 75°C Wet |
| Temperature Rating (THWN-2) | 90°C Dry & Wet |
| Ampacity (75°C) | 20 A |
| Ampacity (90°C) | 30 A |
| Mechanical & Environmental | |
| Min. Bend Radius | 5× overall diameter (installation) |
| Flammability Rating | VW-1 — UL 1581 |
| Oil Resistance | Yes — per UL 1063 |
| Moisture Resistance | Yes — per UL 83 |
| Abrasion Resistance | Nylon jacket provides high abrasion and cut-through resistance |
| Packaging & Logistics | |
| Packaging | Spool / Coil / Reel |
| Standard Lengths | 100 ft / 500 ft / 1000 ft per spool |
| MOQ | 1 spool (sample order available) |
| Lead Time | 5-15 working days (stock: 3-5 days) |
2 Product Overview
The THHN 12 AWG building wire is a UL-certified single-conductor copper wire designed for general-purpose electrical wiring in commercial, industrial, and residential applications. It meets the requirements of UL 83 (Thermoplastic-Insulated Wires) and UL 1063 (Machine-Tool Wire), ensuring full compliance with North American electrical codes.
The soft annealed bare copper conductor delivers excellent electrical conductivity with low DC resistance, minimizing voltage drop over extended runs. The 12 AWG size is one of the most commonly specified conductors for 20A branch circuits, lighting circuits, and receptacle wiring in residential and commercial construction.
The PVC insulation combined with a nylon (polyamide) jacket provides robust protection against abrasion, moisture, oil, and chemicals. The low-friction nylon surface facilitates easy pulling through conduit, reducing installation time and labor costs.
Manufactured to rigorous quality standards under the management of SORIVO, each batch is tested for conductor resistance, insulation integrity, and dimensional compliance. The wire is rated for 600V applications at operating temperatures up to 90°C dry / 75°C wet, with a VW-1 flame rating for enhanced fire safety. For detailed company information, please visit sorivocable.com/about-us/.
3 Key Features
UL 83 & UL 1063 Certified
Fully compliant with UL 83 (building wire) and UL 1063 (machine-tool wire) standards for North American code acceptance.
High-Purity Copper Conductor
Soft annealed bare copper provides excellent conductivity with low DC resistance, reducing energy loss and heat generation.
PVC + Nylon Dual Protection
PVC insulation provides reliable dielectric strength while the nylon jacket offers superior abrasion, moisture, and chemical resistance.
Easy Pulling Through Conduit
The low-friction nylon jacket simplifies pulling through long conduit runs, reducing installation effort and preventing jacket damage.
VW-1 Flame Retardant
Rated VW-1 per UL 1581, limiting flame propagation and enhancing fire safety in plenum and riser applications.
Wide Color Selection
Available in 11 standard colors for phase identification and circuit tracing, simplifying installation and maintenance.
20A Ampacity Rating
Rated for 20A at 75°C, making it the standard choice for 20A branch circuits in residential and commercial construction.
Flexible & Durable
19-strand Class B construction offers flexibility for routing, while maintaining mechanical integrity for long-term reliability.
4 Applications
This building wire is suitable for a variety of electrical installations: