Product Overview
The UL 4703 PV Wire is a sunlight-resistant, XLPE-insulated copper cable engineered for photovoltaic power systems. Rated for 600V/1000V/2000V DC applications, it operates from -40°C to 90°C in wet/dry locations and supports direct burial. Compliant with UL 4703, UL 44 (RHW-2), and UL 854 (USE-2) standards, it delivers reliable performance in solar installations.
Compliance & Certifications
| Standard | Certification | Key Coverage |
|---|---|---|
| UL Subject 4703 | PV Wire Type Certification | Core Solar Cable Standard |
| UL 44 | RHW-2 Rating | Wet/Dry Locations, 90°C |
| UL 854 | USE-2 Rating | Direct Burial, Underground |
| RoHS | Compliant | Hazardous Substance Restriction |
Construction & Materials
| Layer | Specification |
|---|---|
| Conductor | Stranded Copper (Bare or Tinned), per UL 4703 |
| Insulation | Cross-Linked Polyethylene (XLPE) |
| Key Properties | UV Resistance, Moisture Resistance, Flexibility |
Technical Specifications
| Parameter | Value | |
|---|---|---|
| Voltage Rating | 600V AC | 1000V/2000V DC |
| Temperature Range | -40°C to +90°C (Continuous) | |
| Insulation Thickness | 1.90mm (14-10 AWG) to 3.43mm (600+kcmil) | |
| Sunlight Resistance | UL 4703 Certified | |
| Installation | Exposed, Concealed, Direct Burial, Conduit |
Electrical & Mechanical Data (Partial)
| Size (AWG/kcmil) | Strands | Ø (mm) | Resistance (Ω/km) | Weight (kg/km) |
|---|---|---|---|---|
| 10 AWG | 7 | 6.5 | 3.41 | 88 |
| 6 AWG | 7 | 8.6 | 1.35 | 183 |
| 4/0 AWG | 18 | 17.4 | 0.167 | 1140 |
| 500 kcmil | 35 | 24.8 | 0.0709 | 2663 |
| 1000 kcmil | 58 | 33.8 | 0.0345 | 5027 |
Key Advantages
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Extreme Environment Ready
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UV Stabilized: 20+ years direct sunlight exposure (UL 4703 tested)
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Sub-Zero Flexibility: Maintains pliability at -40°C (UL 1581 cold bend test)
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Electrical Reliability
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XLPE insulation retains dielectric strength at 90°C
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Low DC resistance minimizes power loss (e.g., 0.0345 Ω/km @1000kcmil)
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Installation Versatility
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Direct burial without conduit (UL 854 USE-2 compliant)
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Wet location rating (NEC Article 690.31 approved)
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Application Scenarios
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Utility-Scale Solar Farms: String wiring in desert/coastal environments
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Commercial Rooftops: Exposed DC runs on industrial buildings
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Agricultural PV Systems: Direct burial in farm soil
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Floating Solar Plants: Wet location performance
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Remote Off-Grid Installations: Underground conduit applications
Engineering Selection Guide
| Application | Recommended Size | Feature Utilization |
|---|---|---|
| Residential Panel Strings | 10-6 AWG | Cost-effective power transfer |
| Inverter Input Lines | 2-4/0 AWG | Low resistance for high current |
| Long-Distance Underground | 250-500 kcmil | Minimal voltage drop |
| High-Current Combiner Output | 600-1000 kcmil | 2000V DC capacity |