Product Overview
The UL 4703 Solar PV Cable is a premium single-conductor photovoltaic wire engineered for solar energy systems, offering reliable performance in both grounded and ungrounded photovoltaic (PV) applications. Certified for 600V, 1000V, and 2000V AC/DC systems, this cable combines exceptional environmental resistance with high-temperature tolerance, making it ideal for solar panel interconnections, balance of system (BOS) components, and demanding outdoor installations.
Key Features & Benefits
UL 4703 Certified – Compliant with UL 4703, UL 44 (RHW-2), and UL 854 (USE-2) standards for safety and durability.
Wide Voltage Range – Supports 600V, 1000V, or 2000V systems, adaptable to residential, commercial, and utility-scale solar projects.
Extreme Temperature Resistance – Operates in -40°C to +150°C (dry) and -40°C to +90°C (wet) conditions.
UV/Ozone Resistant – Cross-linked polyolefin (XLPO) insulation and sunlight-stabilized jacket ensure longevity in harsh outdoor environments.
Flame Retardant – VW-1 rated for vertical flame resistance, minimizing fire risks in PV arrays.
RoHS & IEC 62930 Compliant – Eco-friendly, free from hazardous substances.
Applications
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PV Module Interconnections: Junction box wiring, panel-to-panel connections.
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Balance of System (BOS): Inverters, combiners, charge controllers, and energy storage systems.
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Outdoor/Indoor Routing: Direct burial, conduit, or exposed installations (code-compliant).
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Solar Farms & Rooftops: Compatible with large-scale PV plants and residential solar setups.
Technical Specifications
Electrical Performance
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Voltage Rating: 600V, 1000V, or 2000V AC/DC (select as per system design).
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Insulation Resistance: ≥20 MΩ·km at 20°C.
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Dielectric Strength: 6 kV AC withstand (5 minutes, no breakdown).
Conductor Options
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Copper: 18 AWG – 2000 kcmil (stranded, tinned for corrosion resistance).
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Aluminum/Copper-Clad Aluminum: 12 AWG – 2000 kcmil (lightweight, cost-effective).
Environmental & Mechanical Properties
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Temperature Range:
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Dry: -40°C to +150°C (copper) / +125°C (aluminum).
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Wet: -40°C to +90°C.
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Flame Resistance: Passes VW-1 vertical flame test.
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UV Stability: Exceeds 720 hours of accelerated weathering (ASTM G154).
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Cold Bend Test: Flexible at -40°C (no cracking).
Construction Details
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Conductor:
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High-purity stranded copper (tinned or bare) or aluminum/copper-clad aluminum.
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Low DC resistance for efficient power transmission.
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Insulation:
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Halogen-free, cross-linked polyolefin (XLPO) or thermoset material.
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Resists heat, moisture, and chemical exposure (oil, acid, alkali).
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Jacket:
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Abrasion-resistant, sunlight-stabilized outer layer.
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Flame-retardant additives for enhanced safety.
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Compliance & Certifications
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UL Standards: UL 4703 (Photovoltaic Wire), UL 44 (RHW-2), UL 854 (USE-2).
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Environmental: RoHS 2.0, IEC 62930 (PV system compliance).
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Safety: VW-1 flame rating, NEC Article 690 compliant.
Packaging & Ordering
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Standard Lengths: 500 ft, 1000 ft, or custom spool sizes.
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Color Options: Black, red, or custom colors (request for availability).
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Certifications: UL, RoHS, and TÜV test reports provided upon request.
Why Choose UL 4703 Solar PV Cable?
Long Service Life: Engineered for 25+ years in extreme weather conditions.
Easy Installation: Stranded design ensures flexibility for complex routing.
Cost-Effective: Aluminum/copper-clad options reduce project costs without compromising performance.
Global Compliance: Meets NEC, IEC, and UL standards for worldwide deployment.
FAQs
Q: Can this cable be used for direct burial in solar farms?
A: Yes! The UV-resistant, moisture-proof jacket complies with direct burial requirements (check local codes).
Q: What distinguishes UL 4703 from USE-2 cables?
A: UL 4703 offers higher temperature ratings (+150°C dry) and superior flexibility, optimized for PV systems.
Q: Is tinned copper necessary for coastal installations?
A: Yes. Tinned copper resists saltwater corrosion, ideal for offshore or high-humidity environments.