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I. Product Overview
The black single core 4mm solar cable is a crucial component in photovoltaic (PV) systems, designed to facilitate efficient and safe power transmission. With a cross-sectional area of 4 square millimeters, this cable strikes a balance between flexibility and current-carrying capacity, making it suitable for a wide range of solar applications. Its black color often signifies the negative polarity in PV wiring, ensuring standardized and error-free installations. Crafted with high-quality materials and robust insulation, it can withstand the rigors of outdoor environments, providing reliable performance over an extended lifespan.
II. Technical Specifications
Parameter | Details |
Conductor Material | Oxygen-free copper (≥99.97%), tinned for corrosion resistance |
Cross-Sectional Area | 4 square millimeters |
Rated Voltage | 1000V DC / 1500V DC |
Current Rating (90°C) | 32A |
DC Resistance (20°C) | ≤4.61Ω/km |
Inner Insulation | Cross-linked polyethylene (XLPE) |
Outer Sheath | UV-stabilized, halogen-free thermoplastic elastomer (TPE), black |
Overall Diameter | Approximately 5.8mm |
Minimum Bend Radius | 4x cable diameter (23.2mm) |
Operating Temperature | -40°C to +90°C |
Flame Retardancy | Complies with IEC 60332-1-2 |
Certifications | TÜV EN 50618, IEC 62930, UL 4703, RoHS |
III. Key Features
3.1 Efficient Power Transmission
The 4mm cross-sectional area enables the cable to carry a current of up to 32A at 90°C, making it ideal for small to medium-sized PV systems. Whether it's connecting solar panels on a residential rooftop or powering a small commercial installation, the cable minimizes power losses, ensuring maximum energy efficiency.
3.2 Durable Insulation
XLPE Inner Insulation: The cross-linked polyethylene inner layer offers excellent electrical insulation, protecting against leakage and short circuits. It also provides high thermal stability, allowing the cable to operate reliably within a wide temperature range.
TPE Outer Sheath: The black UV-stabilized TPE outer sheath not only safeguards the inner insulation from physical damage but also offers superior resistance to ultraviolet radiation, moisture, and chemicals. This makes the cable highly durable and suitable for long-term outdoor use.
3.3 Standardized Polarity Identification
The black color of the cable is widely recognized as indicating the negative polarity in PV systems. This standardization simplifies the wiring process, reducing the risk of incorrect connections and enhancing the overall safety and reliability of the solar installation.
IV. Applications
4.1 Residential Solar Systems
Ideal for connecting solar panels on rooftops of individual homes. In a typical 3 - 5kW residential PV setup, the 4mm single core black cable efficiently transfers power from the panels to the inverter, ensuring a stable electricity supply for household use.
4.2 Small Commercial Installations
Suitable for powering solar arrays on small commercial buildings such as shops, restaurants, and offices. It can handle the power requirements of these installations while maintaining safety and performance standards.
4.3 Off-Grid Solar Setups
For off-grid applications in remote areas like cabins, camping sites, or small rural communities, this cable provides a reliable means of power transmission. Its durability and resistance to harsh environmental conditions make it a practical choice for such setups.
4.4 Portable Solar Kits
Often used in portable solar power kits due to its flexibility and manageable size. It allows for easy connection of solar panels to batteries or other electrical devices, enabling users to generate and store power on the go.
V. Installation and Maintenance
5.1 Installation Guidelines
Termination: Use compatible connectors rated for 4mm cables and the cable's voltage and current capacity. Crimp connectors securely to ensure a stable electrical connection and prevent any potential loose connections that could lead to overheating.
Routing: When routing the cable, maintain a minimum bend radius of 23.2mm to avoid damaging the insulation and conductor. Use appropriate cable clips, conduits, or trays to protect the cable and keep it organized.
Polarity Connection: As the black cable represents the negative polarity, ensure it is correctly connected to the corresponding negative terminals on the solar panels, inverters, or other components to avoid electrical malfunctions.
5.2 Maintenance Tips
Regular Inspection: Periodically check the cable for any signs of damage, including cuts, cracks, or discoloration of the insulation. Pay close attention to the connection points for any signs of overheating or corrosion.
Cleaning: In case of dirt or debris accumulation, gently clean the cable with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals that could damage the outer sheath.
Lifespan Monitoring: While the cable has a long service life under normal conditions, monitor its performance over time. If any significant degradation or performance issues are detected, replace the cable promptly to ensure the continued safe and efficient operation of the PV system.
VI. Comparison with Other Cable Sizes
Cable Size (mm²) | Current Rating (90°C) | Ideal Application Scale | Flexibility |
2.5 | 25A | Small residential (≤3kW) | High |
4 | 32A | Medium residential, small commercial | Moderate |
6 | 41A | Larger commercial, industrial | Low |
The 4mm single core black solar cable offers a balanced solution, providing sufficient current-carrying capacity for a wide range of applications while maintaining reasonable flexibility for easy installation.
In summary, the black single core 4mm solar cable is a reliable, efficient, and versatile choice for various PV applications. Its combination of technical performance, durability, and standardized polarity identification makes it an essential component for ensuring the smooth and safe operation of solar power systems.