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6mm² Black Twin Core Solar Wire
I. Product Overview
The 6mm² black twin core solar wire is a specialized cable designed for efficient power transmission in photovoltaic (PV) systems. With a cross-sectional area of 6 square millimeters for each core, this wire features two insulated conductors encased within a single outer sheath. The black color of the outer sheath is not only a common visual identifier in PV setups but also often associated with negative polarity connections. Engineered to withstand the harsh outdoor environment, it ensures reliable performance, making it an essential component for various solar energy projects, from residential rooftops to commercial solar installations.
II. Technical Specifications
Parameter | Details |
Conductor Material | Oxygen-free copper (≥99.97%), tinned for enhanced corrosion resistance |
Cross-Sectional Area per Core | 6 square millimeters |
Total Cross-Sectional Area | 12 square millimeters |
Rated Voltage | 1000V DC / 1500V DC |
Current Rating (90°C) | 41A per core, 82A combined |
DC Resistance (20°C) | ≤3.08Ω/km per core |
Inner Insulation | Cross-linked polyethylene (XLPE) |
Outer Sheath | UV-stabilized, halogen-free thermoplastic elastomer (TPE), black |
Overall Diameter | Approximately 8.5mm |
Minimum Bend Radius | 6 - 8 times cable diameter (51 - 68mm) |
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
With a current-carrying capacity of 41A per core (82A in total for the twin core), this wire can handle the power output of medium to large-sized PV systems. The tinned copper conductors reduce electrical resistance, minimizing power losses during transmission. For example, in a 15kW solar installation, the 6mm² twin core wire ensures that the majority of the generated power reaches the inverter with minimal energy dissipation, optimizing the overall efficiency of the system.
3.2 Durable Insulation System
XLPE Inner Insulation: The cross-linked polyethylene inner layer provides excellent electrical insulation, protecting against electrical leakage and short circuits. It maintains its integrity across a wide temperature range, ensuring consistent performance in various climates, from extremely cold regions to hot and sunny areas.
TPE Outer Sheath: The black UV-stabilized TPE outer sheath offers robust protection against external factors. It resists ultraviolet radiation, preventing degradation under prolonged sunlight exposure. Additionally, it provides protection against moisture, abrasion, and mild chemical substances, enhancing the wire's durability and extending its lifespan in outdoor environments.
3.3 Simplified Installation
The twin core design integrates both positive and negative conductors within a single sheath, simplifying the wiring process. This feature reduces the time and effort required for installation, especially in complex PV setups. Installers can easily route the wire through conduits, trays, or along rooftops without the need to manage two separate cables, improving installation efficiency and reducing the risk of incorrect connections.
IV. Applications
4.1 Residential Solar Systems
Ideal for connecting multiple solar panels on residential rooftops. In a typical family home PV system, the 6mm² black twin core wire can efficiently link solar panels in series or parallel, transmitting the generated power to the inverter and ensuring a stable electricity supply for household use, including powering appliances, lighting, and heating systems.
4.2 Commercial and Industrial Solar Installations
Well-suited for large commercial buildings such as offices, warehouses, and factories, as well as industrial facilities. These installations often have higher power requirements, and the 6mm² twin core wire can handle the increased current flow from a larger number of solar panels. It enables seamless power collection and transmission to the building's electrical infrastructure or the grid, supporting the energy needs of commercial and industrial operations.
4.3 Off-Grid and Remote Area Installations
In remote locations where access to the main electrical grid is limited, such as rural villages, islands, or remote research stations, the 6mm² twin core solar wire is a reliable choice for establishing self-sufficient solar power systems. It can transmit power from solar panels to batteries for energy storage and subsequent distribution to electrical loads, providing a stable and sustainable power source in off-grid environments.
4.4 Solar-Powered Devices and Small-Scale Projects
Also applicable for powering various solar-powered devices, such as solar streetlights, water pumps, and small-scale monitoring systems. Its manageable size and high current-carrying capacity make it suitable for these smaller applications, offering a convenient and efficient power connection solution.
V. Installation and Maintenance
5.1 Installation Guidelines
Termination: Use compatible connectors rated for 6mm² cables and the wire's voltage and current capacity. MC4 connectors are commonly used in PV systems and are designed to provide a reliable and weatherproof connection for this wire size. Ensure proper crimping of the connectors to create a stable electrical connection and prevent any potential loose connections that could lead to overheating.
Routing: When routing the wire, maintain the minimum bend radius to avoid damaging the insulation and conductors. Use appropriate cable clips, conduits, or trays to support and protect the wire, especially in areas where it may be exposed to mechanical stress or physical damage. Separate the wire from other electrical cables to prevent interference and ensure safe operation.
Polarity Connection: As the black outer sheath may be associated with negative polarity in some setups, ensure correct polarity connection. Double-check the connection of the wire to the corresponding terminals on the solar panels, inverters, or other components to avoid electrical malfunctions and ensure the proper functioning of the PV system.
5.2 Maintenance Tips
Regular Inspection: Periodically check the wire 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, corrosion, or loose connections. Early detection of potential issues can prevent system failures and ensure the continued safe and efficient operation of the PV system.
Cleaning: If dirt, dust, or debris accumulates on the wire, clean it gently with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals that could damage the outer sheath and compromise the wire's protective properties.
Lifespan Monitoring: While the 6mm² black twin core solar wire has a long service life under normal conditions, monitor its performance over time. If significant degradation or performance issues are detected, such as a decrease in insulation resistance or an increase in electrical resistance, consider replacing the wire promptly to maintain the reliability of the PV system.