UL 83 THHN/THWN-2 Building Wire – 600V Copper Conductor, PVC/Nylon (NEC 2023 Compliant)
(For Commercial/Industrial Branch Circuits & Feeders in Dry/Damp/Wet Locations)
Product Overview
UL-listed general-purpose building wire with dual-rated THHN/THWN-2 insulation. Suitable for conduit/cable tray installations per NEC Articles 310/725. Complies with UL 83 (Thermoplastic Insulated Wires) and UL 1581 (Vertical Flame Test).
Key Specifications
| Parameter | Specification | |
|---|---|---|
| Conductor | Solid/Stranded Copper (14–600 MCM) | |
| Insulation | Flame-retardant PVC (FR-PVC) | |
| Outer Jacket | Nylon 6/6 (UL 94 V-2) | |
| Voltage Rating | 600V AC/DC | |
| Temperature Rating | THHN/THWN: 90°C dry/damp | 75°C wet |
| THWN-2: 90°C dry/damp/wet & oil immersion |
Standards & Certifications
- UL Standards: UL 83 (Thermoplastic Insulated Wires) | UL 1581 Sec. 600 (Oil Resistance)
- NEC Compliance: Article 310.15(B)(16) Ampacity Tables (2023 Ed.)
- Flame Tests: UL VW-1 | CSA FT1
Technical Data Table
| AWG | Stranding (UL 62) | Insulation Thickness (in) | Jacket Thickness (in) |
|---|---|---|---|
| 14 | 1 Solid | 0.030 | 0.005 |
| 14 | 19/0.88mm (Class B) | 0.030 | 0.005 |
| 12 | 1 Solid | 0.030 | 0.005 |
| 12 | 19/1.12mm (Class B) | 0.030 | 0.005 |
| 10 | 1 Solid | 0.045 | 0.007 |
| 10 | 19/1.38mm (Class B) | 0.045 | 0.007 |
| 6 | 19/0.94mm² (Class C) | 0.060 | 0.010 |
Applications
✔ Approved Uses:
- Conduit systems (EMT/PVC/GRC)
- Cable trays (NEC 392.10)
- Machine tool wiring (stranded only)
❌ Restrictions:
- Not for direct burial (Specify USE-2/RHH/RHW-2)
- Not for sunlight exposure (Requires UV jacket)
Installation Requirements
- Bending Radius: ≥5× cable diameter
- Support Spacing: ≤1.2m horizontal | ≤1.8m vertical
- Ampacity Derating:
- 80% load factor for 3+ current-carrying conductors
Compliance Markings
Cable surface printed every 24" with:
UL | THHN/THWN-2 | 600V | 90°C | (Manufacturer ID)
Warning Statements
- ⚠️ Oil Exposure: Only THWN-2 suffix permits oil immersion (UL 1581 Sec.600).
- ⚠️ Conductor Termination: Use compression lugs rated for 90°C.
Packaging
| AWG Range | Reel Type | Standard Length |
|---|---|---|
| 14–8 AWG | Plastic | 250ft (76m) |
| 6–600 MCM | Wooden | 500ft (152m) |
