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Copper Cable Underground Cable 4x50 Mm2 95mm 4 Core XLPE 2x0.1mm power cable

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  • Browse number: 326
  • Release time: 2025-09-10 02:16:16

Detailed Description

Comprehensive Guide to Copper Underground Power Cables: 4x50mm², 95mm² 4-Core, and 2x0.1mm² XLPE Insulated Variants

1. Product-Specific Details

1.1 Core Specifications and Electrical Parameters

The 4x50mm², 95mm² 4-core, and 2x0.1mm² copper Underground Cables, all featuring XLPE insulation, are engineered with precise electrical and physical attributes to meet the demands of underground power transmission and signal distribution. These specifications ensure compatibility with diverse electrical systems while prioritizing efficiency, safety, and durability.
Voltage Ratings:
  • The 4x50mm² and 95mm² 4-Core Cables are rated for medium-low voltage applications, typically ranging from 0.6/1kV to 10kV. This range makes them suitable for secondary distribution networks, where electricity is transmitted from substations to industrial facilities, residential complexes, and commercial areas. The 0.6/1kV rating indicates safe operation at 0.6kV phase-to-earth and 1kV phase-to-phase, while higher 10kV variants cater to larger-scale infrastructure projects.

  • The 2x0.1mm² cable operates at low voltages (≤0.6kV), designed specifically for signal transmission, control circuits, or auxiliary power in smart grid systems, CCTV networks, and industrial automation setups.

Conductor Dimensions and Current-Carrying Capacity:
  • 4x50mm² 4-Core Cable: Each of the four stranded Copper Conductors has a cross-sectional area of 50mm². This size enables a current-carrying capacity of up to 115A when installed in soil (ambient temperature 30°C) and 100A in air, making it ideal for distributing power to multiple residential or commercial buildings.

  • 95mm² 4-Core Cable: With four 95mm² conductors, this cable handles higher currents—up to 180A in soil and 160A in air—suited for industrial machinery, data centers, and large infrastructure projects with elevated power demands.

  • 2x0.1mm² Cable: The ultra-fine 0.1mm² conductors limit current capacity to ≤5A, focusing on low-power signal transmission rather than energy distribution.

Resistance and Efficiency:
Copper’s high conductivity (58 MS/m at 20°C) minimizes power loss. For the 4x50mm² cable, DC resistance at 20°C is approximately 0.383Ω/km per conductor; the 95mm² variant reduces this to 0.206Ω/km, enhancing efficiency over long distances. The 2x0.1mm² cable, with a DC resistance of ~185Ω/km, prioritizes signal integrity over low resistance, ensuring stable transmission in control circuits.
Impedance and Frequency Performance:
All cables exhibit low impedance, critical for maintaining voltage stability. At 50Hz, the 4x50mm² and 95mm² cables have an impedance of ~0.15Ω/km and ~0.12Ω/km, respectively, while the 2x0.1mm² cable’s impedance is optimized for high-frequency signal transmission (up to 1MHz), making it suitable for data-rich applications like smart metering.

1.2 Material Composition and Structural Design

The performance of these Underground Cables is rooted in their high-quality materials and layered construction, engineered to withstand harsh subsurface conditions—moisture, soil pressure, chemical exposure, and mechanical stress.
High-purity electrolytic copper is chosen for its superior conductivity and corrosion resistance. Stranded construction (comprising multiple thin wires twisted together) enhances Flexibility, allowing the cables to bend around obstacles during installation without damaging the conductor. For the 4x50mm² and 95mm² cables, stranding also reduces skin effect (current concentration at the conductor surface) at higher frequencies, improving efficiency.
XLPE Insulation:
Cross-linked polyethylene (XLPE) is the Insulation Material across all variants, transformed via chemical or radiation cross-linking into a three-dimensional molecular structure. This process endows XLPE with:
  • Thermal Stability: Continuous operation at 90°C, with short-term overloads up to 130°C, preventing insulation breakdown under high current loads.

  • Water Tree Resistance: Critical for underground use, as it resists the formation of conductive paths caused by moisture, a common cause of insulation failure in PE-Insulated Cables.

  • High Dielectric Strength: ≥20kV/mm, ensuring reliable insulation even in damp environments.

Protective Sheathing:
  • HDPE Sheaths: Most variants feature a high-density polyethylene (HDPE) outer layer, chosen for its impact resistance (withstanding soil pressure and rock abrasion), chemical inertness (resisting soil minerals and industrial contaminants), and flexibility. HDPE is also UV-stable, protecting against temporary exposure during installation.

  • PVC Sheaths: Some 4x50mm² and 95mm² cables use PVC sheaths, which enhance flame retardancy (meeting IEC 60332-1-2 standards) and are easier to strip during termination, making them preferred for indoor-outdoor transitions in commercial buildings.

Core Bundling and Moisture Barriers:
In 4-core designs (4x50mm² and 95mm²), individually Insulated Conductors are twisted together to form a compact bundle, reducing overall diameter and improving flexibility. A binder tape wraps the bundle to prevent abrasion between cores. Gaps between conductors are filled with a water-blocking compound (polypropylene yarns saturated in hydrophobic gel) to prevent longitudinal water ingress—critical for underground installations where moisture can seep through sheath damage.
Armoring (Optional for 95mm²):
Some 95mm² 4-core variants include galvanized steel wire armoring (SWA) for extra mechanical protection in high-stress environments (e.g., rocky soil or areas prone to rodent damage). The armor adds rigidity but reduces flexibility, making it suitable for direct burial rather than conduit installations.

1.3 Production 工艺

The manufacturing process of these cables adheres to strict quality standards (IEC 60502, BS 6724) to ensure consistency and reliability.
Conductor Stranding:
Copper rods are drawn into thin wires (0.2–0.5mm diameter) and twisted in layers to form the required cross-sectional area. For 50mm² conductors, this involves ~50 wires; 95mm² conductors use ~100 wires. The stranding machine ensures uniform tension to prevent uneven stress during installation.
XLPE Insulation Extrusion:
Conductors pass through an extrusion line where molten XLPE is applied at 180–200°C. The insulation thickness is precisely controlled (e.g., 1.2mm for 0.6/1kv Cables) using laser diameter monitors. After extrusion, the cables undergo cross-linking: chemical cross-linking uses peroxides activated by heat (200–250°C in a vulcanization tube), while radiation cross-linking employs electron beams to bond polymer chains—resulting in better thermal stability.
Core Bundling and Sheathing:
For 4-core cables, insulated conductors are twisted together at a controlled lay length (15–20 times the cable diameter) to ensure flexibility. The bundle is wrapped in binder tape, and water-blocking compounds are applied. The outer sheath (HDPE or PVC) is extruded over the bundle at 160–200°C, with thickness varying by application (e.g., 2.5mm for direct burial).
Testing:
Each cable undergoes rigorous testing:
  • Voltage Withstand: 3kV AC for 5 minutes to check insulation integrity.

  • Partial Discharge: Measured at 1.73x rated voltage to ensure no internal arcing.

  • Thermal Cycling: Exposed to -40°C to +90°C cycles to test material resilience.

  • Tensile and Impact Tests: Validate sheath and insulation strength.

1.4 特色用途 and Application Scenarios

These cables are tailored to specific underground environments, leveraging their design features to address unique operational needs.
4x50mm² 4-Core Cable:
  • Residential Distribution: Ideal for powering suburban neighborhoods, where it connects transformers to cluster homes. Its 115A capacity supports multiple households, while flexibility eases installation in narrow trenches under lawns or driveways.

  • Commercial Parks: Used in shopping centers or office complexes to distribute power to lighting, HVAC, and small machinery. HDPE-sheathed variants resist chemical exposure from parking lot deicers.

  • Greenfield Developments: Deployed in new housing estates, where its balance of size and capacity fits within utility easements without requiring excessive trenching.

95mm² 4-Core Cable:
  • Industrial Zones: Powers heavy machinery in factories (e.g., automotive assembly lines, steel mills) where 180A capacity meets high load demands. Armored variants withstand vibration and mechanical stress from nearby equipment.

  • Data Centers: Connects backup generators to main distribution panels, ensuring uninterrupted power. XLPE insulation’s thermal stability prevents breakdown during generator overloads.

  • Infrastructure Projects: Used in airports, stadiums, and metro systems to supply power to lighting, security systems, and escalators. Its high current capacity supports peak loads during events.

2x0.1mm² Cable:
  • Smart Grids: Transmits real-time data between smart meters and utility servers, enabling remote monitoring of energy usage. Its small size allows integration with existing Power Cables in conduits.

  • CCTV and Security Networks: Carries video signals in underground surveillance systems (e.g., subway tunnels, parking garages). Low signal loss ensures high-definition footage transmission.

  • Industrial Control Circuits: Connects sensors to PLCs (programmable logic controllers) in manufacturing plants, regulating machinery via low-voltage signals. Its flexibility suits tight routing in control panels.

2. Product General Information

2.1 Packaging

Packaging is designed to protect cables during storage, handling, and transportation, preserving their integrity until installation.
Reel Packaging:
  • Large Cables (4x50mm², 95mm²): Wound onto wooden or steel reels with flanges (diameters 1.2m–2.5m). Reels are sized to hold 100–500m of cable, depending on diameter. Steel reels are used for heavier 95mm² cables to withstand weight (up to 2 tons).

  • Small Cables (2x0.1mm²): Packaged on smaller plastic reels (300–500mm diameter) holding 100–1000m, suitable for manual handling.

Protective Layers:
  • The cable surface is wrapped in moisture-resistant kraft paper or plastic film to prevent dust and moisture ingress.

  • Reels are fitted with steel straps to secure the cable and prevent unwinding. End caps seal the cable ends, protecting conductors and insulation from debris.

Labeling:
Each reel is labeled with:
  • Cable type (e.g., “4x50mm² XLPE/HDPE 0.6/1kV”).

  • Length, batch number, and manufacturing date.

  • Compliance marks (IEC, CE, UL).

  • Handling instructions (e.g., “Do not stack,” “Lift from center”).

Storage Guidelines:
Reels should be stored in a dry, covered area, elevated on pallets to avoid ground moisture. Large reels must be secured upright to prevent tipping; stacking is prohibited to avoid crushing. The 2x0.1mm² cable reels can be stored horizontally in racks, provided they are not exposed to direct sunlight (to prevent PVC sheath degradation).

2.2 Transportation

Transporting these cables requires specialized logistics to handle their weight and sensitivity to environmental factors.
Mode of Transport:
  • Domestic Shipments: Flatbed trucks or trailers for large reels. 4x50mm² and 95mm² reels are secured with chains and anti-slip mats to prevent movement. For urban areas with narrow roads, smaller reels (100m) may be used.

  • International Shipments: Shipping containers (20ft or 40ft) with reel racks. Cables are secured using dunnage and lashings to withstand container movement at sea. Climate-controlled containers are optional for PVC-Sheathed Cables to avoid extreme temperature exposure.

  • Rail Transport: Preferred for bulk orders (e.g., 10+ reels) over long distances. Rail cars with flatbeds and reel locks ensure stable transport, reducing transit time compared to road transport.

Handling Protocols:
  • Reels must be lifted using cranes or forklifts, with slings attached to designated lifting points (marked on reel flanges). Dragging reels is prohibited, as it can damage the sheath and insulation.

  • Temperature control: Cables must be transported at -20°C to +50°C. Extreme cold (below -20°C) can make HDPE sheaths brittle, while temperatures above 50°C may soften PVC, leading to deformation.

  • Weather protection: Open trucks must use tarpaulins to shield reels from rain, snow, and UV radiation.

Customs and Documentation:
International shipments require:
  • Commercial invoices detailing cable specifications and value.

  • Certificates of conformity (IEC 60502, BS 6724) to meet import regulations.

  • Packing lists with reel counts and dimensions for customs inspection.

2.3 Shipping and Delivery

The shipping process is streamlined to ensure timely delivery and minimize delays, with clear communication between stakeholders.
Order Processing:
Upon order confirmation, the manufacturer verifies stock availability. Custom orders (e.g., armored 95mm² cables) require 2–4 weeks for production. Customers receive a pro forma invoice with payment terms, and production begins upon payment confirmation.
Tracking and Notifications:
  • A unique tracking number is provided once the shipment departs. Customers can monitor progress via an online portal, with updates at key milestones (e.g., “Loaded onto truck,” “Cleared customs,” “Out for delivery”).

  • Automated alerts (email/SMS) notify customers of delays (e.g., weather, customs hold) and revised delivery times.

Delivery Scheduling:
  • Delivery is scheduled in advance, with a 2-hour window to allow customer preparation. For large reels, the delivery team coordinates with the customer to ensure suitable offloading equipment (e.g., on-site crane) is available.

  • Unloading is supervised by the logistics team to ensure proper handling. The customer signs a delivery receipt acknowledging receipt of undamaged goods.

Delivery Inspection:
Customers must inspect reels upon delivery:
  • Check for reel damage (cracks, broken flanges) and sheath punctures.

  • Verify cable length and markings match the order.

  • Report damage within 24 hours with photos for claims processing. The manufacturer arranges replacements or repairs at no cost for transit-related damage.

2.4 Samples

Sample provision allows customers to validate cable quality and suitability before placing bulk orders.
Sample Availability:
  • 4x50mm² and 95mm² samples: 1–2m lengths, including all layers (conductor, XLPE insulation, sheath). Armored variants include a section of steel wire armor.

  • 2x0.1mm² samples: 5–10m lengths, often with terminated ends to demonstrate compatibility with connectors.

Request Process:
  • Samples can be requested via the manufacturer’s website, email, or sales hotline. Customers provide details (cable type, application) to ensure relevant samples are sent.

  • Cost: Samples are free for qualified customers (e.g., electrical contractors, utility companies), with shipping charges applied. For international requests, samples may incur import duties.

  • Turnaround: Samples are dispatched within 3–5 business days via courier (DHL, FedEx), with tracking provided.

Sample Testing Guidance:
Customers are advised to perform:
  • Visual Inspection: Check for uniform insulation thickness, smooth sheath surfaces, and secure stranding.

  • Mechanical Tests: Bend samples to 10x their diameter to test flexibility; strip sheaths to verify adhesion to insulation.

  • Electrical Tests: Use a megohmmeter to check insulation resistance (≥1000MΩ at 500V).

2.5 After-Sales Service


The after-sales service provided for these underGround Cables is crucial to ensuring customer satisfaction and the long-term performance of the cables.
Technical support is available to customers who have questions or need assistance with the installation, operation, or maintenance of the cables. The manufacturer or supplier's technical team can provide guidance on proper installation techniques, such as how to handle and position the cables, how to make connections, and how to test the cable after installation. They can also offer advice on troubleshooting any issues that may arise, such as voltage drops, insulation failures, or interference problems.
Warranty coverage is provided for the cables, typically ranging from 5 to 10 years, depending on the manufacturer and the cable type. The warranty covers defects in materials and workmanship, ensuring that the customer receives a replacement or repair if the cable fails due to these issues within the warranty period. To claim the warranty, the customer needs to provide proof of purchase and details of the problem. The manufacturer or supplier will then investigate the claim and take appropriate action.
In the event of a problem with the cable that is not covered by the warranty, the supplier may offer repair or replacement services for a fee. They can also provide maintenance services, such as periodic inspections and testing, to help customers identify potential issues before they become major problems.
Customer feedback is valued, and the manufacturer or supplier uses it to improve their products and services. They may follow up with customers after delivery to ensure that they are satisfied with the cables and to address any concerns. This commitment to after-sales service helps to build long-term relationships with customers and ensures the continued success of the product.
In conclusion, these copper Underground Power Cables with XLPE insulation offer a reliable and efficient solution for various power distribution and signal transmission applications. Their detailed specifications, unique applications, high-quality materials, and careful production process ensure their performance and durability. The comprehensive packaging, transportation, shipping, sample, and after-sales services further enhance their value, making them a preferred choice for customers in different industries.
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ADD:Xiaokou Industrial Development Zone, Ningjin County, Xingtai City,Hebei Province, China

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