THHN/THWN-2 Nylon Coat Building Wire
Voltage:600V
Jacket:PVC+Nylon
Conductor: Copper
Products Description
THHN/THWN-2 Nylon Coat Building Wire is a UL 83 & NEC-compliant thermoplastic insulated, nylon-jacketed building wire designed for 600V power distribution in commercial, industrial, and residential construction. It is dual-rated: THHN (90°C dry) and THWN-2 (90°C dry/wet), making it suitable for both dry and damp locations.
The conductor is annealed bare copper (ASTM B3/B8), ensuring low resistance and reliable conductivity. The core insulation is heat-resistant PVC, providing excellent dielectric strength and thermal stability. The outer layer is a tough, smooth nylon jacket that acts as a mechanical barrier-boosting resistance to abrasion, oil, chemicals, moisture, and UV exposure-while enabling easier pulling through conduits.
Engineered for -40°C to +90°C continuous operation and 250°C short-circuit rating, this wire meets strict UL 1581 VW-1 flame retardancy and RoHS/REACH environmental standards. Every batch undergoes 100% electrical, dimensional, and mechanical testing, plus third-party validation (UL/CSA) for compliance.
| Parameter | Value | Standard |
|---|---|---|
| Rated Voltage | 600V AC | UL 83, NEC |
| Rated Temperature | THHN: 90°C (dry); THWN-2: 90°C (dry/wet) | UL 83 |
| Short-Circuit Temperature | 250°C (max) | UL 1581 |
| Conductor Material | Annealed bare copper (tinned optional) | ASTM B3, B8 |
| Conductor Size | 14 AWG – 4/0 AWG; 250–1000 kcmil | UL 83 |
| Insulation Material | Heat-resistant PVC | UL 83 |
| Jacket Material | Nylon (polyamide), self-lubricating | UL 83 |
| Insulation Thickness | 0.76 mm (nominal) | UL 83 |
| Jacket Thickness | 0.13 mm (nominal) | UL 83 |
| Test Voltage (1 min) | 14–2 AWG: 2.0 kV; 1–4/0 AWG: 2.5 kV | UL 1581 |
| Minimum Bending Radius | Fixed: 10×OD; Flexible: 15×OD | UL 83 |
| Flame Retardancy | VW-1 (UL 1581), CSA FT1, IEC 60332-1-2 | UL 1581 |
| Certification | UL, CSA, RoHS, REACH | US/EU Directives |
Features
1.Dual-Rated Performance: THHN (dry, 90°C) and THWN-2 (dry/wet, 90°C) for maximum installation flexibility.
2.Superior Thermal Stability: Operates reliably from -40°C to +90°C; withstands 250°C short-circuit spikes.
3.Robust Mechanical Protection: Nylon jacket resists abrasion, impact, and crushing during installation and service.
4.Chemical & Moisture Resistance: Nylon repels oil, grease, solvents, and moisture; ideal for damp or wet locations.
5.Easy Installation: Self-lubricating nylon surface reduces friction, simplifying pulling through conduits and reducing labor time.
6.Flame Safety: VW-1 flame retardant rating limits fire spread; low-smoke formulation enhances safety in enclosed spaces.
7.Long-Term Durability: Resists aging, UV, and corrosion; delivers 20+ years of reliable service under normal conditions.
Applications
1.Commercial Buildings: Office towers, malls, hospitals, schools-branch circuits, feeders, lighting, and power outlets.
2.Industrial Facilities: Factories, warehouses, processing plants-machine wiring, control panels, motor connections, and high-temperature areas.
3.Residential Construction: Homes, apartments, condos-indoor wiring, walls, ceilings, attics, and crawlspaces.
4.Wet/Damp Locations: Basements, bathrooms, kitchens, laundry rooms, and outdoor conduits (THWN-2 rating).
5.Conduit & Racetrack Installations: PVC/metal conduits, electrical tubing, and cable trays-easy pulling and long-term reliability.
6.Retrofit & Renovation: Upgrading old wiring in existing buildings-compatible with NEC and local codes.
why choose us
why choose our products
1. Rigorous Quality Control
We follow ISO 9001 and UL production standards with an 8-step precision workflow: raw material inspection (99.99% pure copper), conductor stranding, PVC insulation extrusion, nylon jacketing, curing, printing, 100% final testing (electrical, dimensional, mechanical), and third-party UL/CSA validation.
2. Premium Certified Materials
Only high-purity annealed copper (ASTM B3/B8) and UL-approved PVC/nylon are used, ensuring consistent conductivity, thermal stability, and durability. All materials comply with RoHS/REACH.
3. Exceptional Durability & Reliability
Engineered for 20+ years of service life, our THHN/THWN-2 wires resist aging, abrasion, oil, moisture, and UV. Rigorous testing (thermal cycling, flame, and tensile tests) guarantees long-term stability.
4. Dual-Rated High-Temperature Performance
Rated 600V and 90°C dry/wet (THWN-2), the wire excels in both dry and damp environments, withstanding extreme temperatures and harsh industrial conditions.
5. Flexible Customization
Tailor-made solutions for AWG sizes (14–4/0 AWG), colors (black, white, red, blue, green), and lengths (100–10,000 ft) to match project requirements. Custom printing and packaging available.
6. Fast Delivery & Competitive Pricing
Direct factory pricing with no middlemen, ensuring cost-effective solutions without quality compromise. 7–15 day lead time for bulk orders; sample orders (50–100 m) available for testing. Global shipping via sea/air/express with professional wooden drum packaging.
7. Professional Technical Support
Our multilingual engineering team provides one-stop support: custom design, parameter optimization, compliance documentation, and 24/7 after-sales service.
FAQ
01.What does THHN/THWN-2 mean?
02.Can THHN/THWN-2 be used outdoors?
03.What is the maximum voltage rating?
04.What certifications do your wires have?
05.What is the difference between THHN and THWN-2?
06.Can you customize wire color and length?
Our address
Fame Building, Sanqiao Sub-district, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 18802926539
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