UL THHN/THWN-2 Copper Wire | PVC/Nylon Insulated | 90°C Moisture & Flame Resistant | 600V Building Cable
Product Overview
This UL-certified THHN/THWN-2 electrical cable delivers robust performance for commercial, industrial, and residential power distribution. Engineered with annealed copper conductors, flame-retardant PVC insulation, and abrasion-resistant nylon jacketing, it excels in heat/moisture resistance (90°C wet/dry) and flame propagation suppression. Compliant with UL 83 standards for 600V applications, it supports NEC-compliant installations in diverse environments.
Key Standards & Certifications
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UL Standard: UL 83 (Thermoplastic Insulated Wires and Cables)
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Listings: Dual-rated THHN/THWN-2
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Voltage Rating: 600V
Construction
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Conductor:
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Annealed copper (solid: 14-10 AWG; stranded: 8 AWG-1000 kcmil)
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Optimized conductivity and flexibility
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Insulation:
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Flame-retardant PVC (UL-recognized)
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Resists heat, moisture, oils, and chemicals
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Jacket:
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Polyamide (Nylon) outer layer
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Enhanced mechanical protection and conduit pullability
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Temperature Ratings
| Rating | Dry/Damp Locations | Wet/Oil-Immersed |
|---|---|---|
| THHN/THWN | 90°C (194°F) | 75°C (167°F) |
| THWN-2 | 90°C (194°F) | 90°C (194°F) |
Applications
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Service entrances, feeders, and branch circuits
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Conduit, cable tray, and raceway installations
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Industrial control systems & commercial machinery
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NEC-compliant dry/damp/wet locations (THWN-2)
Technical Specifications
| Conductor Size (AWG/kcmil) | Stranding | Insulation Thickness (mils) | Jacket Thickness (mils) | Nominal O.D. (mils) | Approx. Weight per 1000 ft (lbs) | Allowable Ampacity (90°C) |
|---|---|---|---|---|---|---|
| 14 | 7 | 15 | 4 | 109 | 16 | 15 |
| 12 | 7 | 15 | 4 | 128 | 24 | 20 |
| 10 | 7 | 20 | 4 | 161 | 38 | 30 |
| 8 | 7 | 30 | 5 | 213 | 63 | 55 |
| 6 | 7 | 30 | 5 | 249 | 95 | 75 |
| 4 | 7 | 40 | 6 | 318 | 152 | 100 |
| 3 | 7 | 40 | 6 | 346 | 189 | 115 |
| 2 | 7 | 40 | 6 | 378 | 234 | 130 |
| 1 | 19 | 50 | 7 | 435 | 299 | 145 |
| 1/0 | 19 | 50 | 7 | 474 | 372 | 170 |
| 2/0 | 19 | 50 | 7 | 518 | 462 | 195 |
| 3/0 | 19 | 50 | 7 | 568 | 575 | 225 |
| 4/0 | 19 | 50 | 7 | 624 | 718 | 260 |
| 250 | 37 | 60 | 8 | 694 | 851 | 290 |
| 300 | 37 | 60 | 8 | 747 | 1012 | 320 |
| 350 | 37 | 60 | 8 | 797 | 1174 | 350 |
| 400 | 37 | 60 | 8 | 842 | 1334 | 380 |
| 500 | 37 | 60 | 8 | 926 | 1655 | 430 |
| 600 | 61 | 70 | 9 | 1024 | 1987 | 475 |
| 750 | 61 | 70 | 9 | 1126 | 2464 | 535 |
| 1000 | 61 | 70 | 9 | 1275 | 3257 | 615 |
(Note: Ampacities based on 90°C conductor temperature in free air (30°C ambient). Consult NEC for specific installation conditions and derating factors.)
Engineering Advantages
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Safety Compliance: UL 83-certified flame retardancy
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Environmental Resilience: 90°C wet/dry operation (THWN-2)
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Durability: Nylon jacketing resists cuts, chemicals, and abrasion
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Versatility: Dual rating for dry/damp/wet locations
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Installation Efficiency: Smooth surface reduces conduit friction