Factory-Direct Supply of Certified Wires and Conductors for Diverse Industrial Applications
THWN THWN-2 Wire 600V
Voltage: 600V, UL-83 Listed, 90°C wet+dry (THWN-2), 75°C wet (THWN)
Conductor: Soft copper, ASTM B-3 solid (AWG 20-10) & B-8 Class B stranded (AWG 14-700 MCM)
Insulation: PVC inner (0.56-1.27mm) + Nylon jacket (0.10-0.30mm), gasoline/oil resistant
Ampacity: Free-air + conduit (≤3 conductors), 90°C THWN-2 single column
Range: 28 sizes AWG 20-700 MCM, solid & stranded, 5.5-3,370 kg/km
Application: General purpose wiring per NEC, machine tool (NFPA 79), conduit & service entrance
Standard: ASTM B-3/B-8, UL-83, NEMA WC-5
Product Overview
THWN THWN-2 Wire 600V is the wet-location rated single-core copper building wire manufactured to ASTM B-3/B-8, UL-83, NEMA WC-5. The dual designation marks the temperature rating: THWN is rated 75°C in wet locations; THWN-2 (the superseding designation) is rated 90°C in both wet and dry locations — the full-performance wet-location rating that eliminates the ampacity penalty of standard THWN. Available in 28 sizes from AWG 20 solid to 700 MCM stranded, the PVC+Nylon construction provides gasoline, oil, acid, and abrasion resistance with a minimum installation temperature of 0°C for low-temperature pulling.
Outer Jacket — Forest green PVC+Nylon, glossy cylindrical surface
Conductor — Silver-grey multi-strand aluminium, concentric rings at stripped end cross-section
Stranding — Multi-layer compact construction, individual wire strand lines visible along the cylindrical body
THWN-2 90°C Wet + Dry
Superseding rating — single 90°C ampacity column for all environments. Eliminates the THWN 75°C wet penalty.
PVC + Nylon 3-Layer
PVC (0.56-1.27mm) + Nylon jacket (0.10-0.30mm). Gasoline, oil, acid and abrasion resistant. 0°C min installation temperature.
28 Sizes AWG 20-700 MCM
Solid (AWG 20-10) + stranded (14-700 MCM). Free-air + conduit ampacity. 100m-1000m spools, export wooden case.
Technical Specifications
Soft temper copper per ASTM B-3 (solid) and ASTM B-8 Class B (stranded). PVC+Nylon insulation per UL-83. All 28 sizes single core.
| AWG/MCM | Stranding | PVC (mm) | Nylon (mm) | O.D. (mm) | Amp Free (A) | Amp Conduit (A) | Weight (kg/km) |
|---|---|---|---|---|---|---|---|
| 20 | 1/0.80 | 0.56 | 0.10 | 2.2 | — | — | 5.5 |
| 18 | 1/1.02 | 0.56 | 0.10 | 2.5 | — | 14 | 8.7 |
| 16 | 1/1.29 | 0.56 | 0.10 | 2.8 | — | 18 | 13.5 |
| 14 | 1/1.63 | 0.56 | 0.10 | 3.2 | 30 | 25 | 21 |
| 12 | 1/2.05 | 0.56 | 0.10 | 3.7 | 35 | 30 | 33 |
| 10 | 1/2.59 | 0.56 | 0.10 | 4.5 | 50 | 40 | 52 |
| Stranded (Class B) | |||||||
| 14 | 7/0.62 | 0.56 | 0.10 | 3.4 | 30 | 25 | 22 |
| 12 | 7/0.78 | 0.56 | 0.10 | 4.0 | 35 | 30 | 36 |
| 10 | 7/0.98 | 0.56 | 0.10 | 4.8 | 50 | 40 | 54 |
| 8 | 7/1.23 | 0.76 | 0.10 | 5.9 | 65 | 55 | 81 |
| 6 | 7/1.56 | 0.76 | 0.10 | 7.0 | 95 | 75 | 133 |
| 4 | 7/1.96 | 0.76 | 0.10 | 8.4 | 125 | 95 | 213 |
| 2 | 7/2.47 | 0.76 | 0.10 | 10.1 | 170 | 130 | 341 |
| 1/0 | 19/1.75 | 1.02 | 0.13 | 13.2 | 230 | 170 | 571 |
| 2/0 | 19/1.97 | 1.02 | 0.13 | 14.6 | 265 | 195 | 739 |
| 3/0 | 19/2.21 | 1.02 | 0.13 | 16.2 | 310 | 225 | 936 |
| 4/0 | 19/2.48 | 1.02 | 0.13 | 17.9 | 360 | 260 | 1,189 |
| 250 | 37/2.30 | 1.27 | 0.18 | 20.3 | 405 | 290 | 1,447 |
| 300 | 37/2.52 | 1.27 | 0.18 | 22.0 | 445 | 320 | 1,727 |
| 350 | 37/2.72 | 1.27 | 0.18 | 23.7 | 505 | 350 | 2,013 |
| 400 | 37/2.91 | 1.27 | 0.18 | 25.3 | 545 | 380 | 2,261 |
| 500 | 37/3.26 | 1.27 | 0.20 | 28.0 | 620 | 430 | 2,820 |
| 550 | 61/2.66 | 1.27 | 0.23 | 29.9 | — | — | 3,100 |
| 600 | 61/2.78 | 1.27 | 0.23 | 31.2 | — | — | 3,380 |
| 650 | 61/2.89 | 1.27 | 0.25 | 32.2 | — | — | 3,665 |
| 700 | 61/3.00 | 1.27 | 0.25 | 33.4 | — | — | 3,370* |
Typical Applications
Service Entrance
THWN-2 90°C wet rating qualifies for outdoor service entrance conduit — the supreme wet-location building wire for utility-to-building connections.
Machine Tool Wiring
Per NFPA 79. Nylon jacket resists cutting oils and coolants. 0°C min installation enables winter construction without preheating.
General Purpose NEC Wiring
Conduit, raceway, and cable tray for commercial and industrial building circuits — the standard American building wire since the 1960s.
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Frequently Asked Questions
As a factory, we offer flexible MOQ depending on the cable type. For standard stock items, MOQ is low; for customized specifications, please contact our sales team for a detailed quote.
Yes, Qiangli cables are manufactured in compliance with international standards such as UL, CE, TUV, and VDE. We provide full test reports and certificates upon request.
Absolutely. We have a dedicated R&D team that can customize cable structure, material, color, and printing to meet your specific project needs.
For standard products, lead time is usually 7-15 days. For large-scale project orders or customized products, it typically ranges from 20 to 30 days.
Yes, we provide free samples for most standard cables. You only need to cover the international courier costs. Contact us to arrange your sample shipment.