Wires and Cables
Overhead Insulated Cable
XLPE-HDPE Tree Cable Aluminum 25kV 1x120mm²
The XLPE-HDPE Tree Cable Aluminum 25kV 1x120mm² is designed for medium-voltage overhead distribution systems requiring very high current capacity. Perfect for long-distance transmission lines in rural, coastal, or high-load industrial areas, this cable combines superior durability, environmental resistance, and reliable electrical performance to ensure stable power delivery with minimal energy loss and maintenance. The inner insulation uses cross-linked polyethylene (XLPE), rated for continuous conductor operation at 90°C, fully compliant with ICEA S-121-733 standards. The robust outer jacket is made from high-density polyethylene (HDPE), providing excellent resistance to weathering, ultraviolet radiation, mechanical abrasion, and electrical sparking up to 2.75kV. Standard gray cables feature ASTM B230 markings and sequential metering, while blue cables with spark resistance over 5kV are recommended for harsher environmental conditions. With its ultra high current capacity, robust construction, and environmental resilience, the XLPE-HDPE 25kV tree cable 1x120mm² delivers reliable, long-term power distribution for demanding overhead network applications, ensuring efficiency, safety, and minimal maintenance.
XLPE-HDPE Tree Cable Aluminum 25kV 1x150mm²
The XLPE-HDPE Tree Cable Aluminum 25kV 1x150mm² is engineered for medium-voltage overhead distribution systems requiring very high current capacity. Ideal for long-distance transmission in rural, coastal, and industrial areas, this cable provides exceptional reliability, efficient energy delivery, and long-term performance while minimizing line losses and maintenance costs. Constructed with high-conductivity aluminum alloy 1350 wires, the conductor features round compacted, class 2 stranding, with minimum conductivity of 61% IACS and tensile strength of at least 130 MPa. Optional conductor shielding with extruded semiconductor thermosetting compound is available for enhanced performance in 15kV and 25kV applications.
XLPE-HDPE Tree Cable Aluminum 25kV 1x185mm²
Power your network with confidence using the XLPE-HDPE Tree Cable Aluminum 25kV 1x185mm² – a high-performance medium-voltage cable engineered for demanding overhead distribution systems. Whether it’s industrial zones, main feeder lines, or expansive urban and rural networks, this cable delivers reliable, efficient, and uninterrupted power where you need it most. Built with high-conductivity aluminum alloy 1350 wires and compact class 2 stranding, it guarantees optimal current flow and mechanical strength. Optional semiconductor shielding enhances electrical stability for 15kV and 25kV networks, making it a dependable choice for modern power infrastructure. The XLPE inner insulation withstands 90°C continuous operation, while the robust HDPE outer jacket offers exceptional resistance to weather, UV exposure, mechanical abrasion, and electrical sparking. Available in gray with ASTM B230 markings and sequential metering, or blue for extra spark resistance in harsher environments, this cable is designed to perform under pressure.
XLPE-HDPE Tree Cable Aluminum 25kV 1x240mm²
Deliver uninterrupted power with the XLPE-HDPE Tree Cable Aluminum 25kV 1x240mm² – a premium medium-voltage cable designed for high-demand overhead distribution networks. Perfect for industrial areas, large urban grids, and major interconnection lines, this cable supports very high current capacity while maintaining reliable performance over long distances. Constructed with high-conductivity aluminum alloy 1350 wires in round compacted class 2 stranding, it ensures exceptional current-carrying efficiency and mechanical durability. Optional extruded semiconductor shielding enhances electrical stability in 15kV and 25kV applications. Choose the XLPE-HDPE 25kV Tree Cable 1x240mm² for a long-lasting, low-maintenance, and high-performance power solution that ensures safe, stable, and efficient electricity transmission across your network.
XLPE-HDPE Tree Cable Aluminum 25kV 1x300mm²
Ensure uninterrupted power delivery with the XLPE-HDPE Tree Cable Aluminum 25kV 1x300mm² – engineered for medium-voltage overhead distribution systems requiring very high current capacity. Perfect for main feeder lines, long-distance rural transmission, industrial zones, and densely populated urban areas, this cable guarantees dependable performance under the most demanding conditions. Featuring high-conductivity aluminum alloy 1350 wires in round compacted class 2 stranding, it offers superior current flow and mechanical strength. Optional extruded semiconductor shielding enhances electrical stability for 15kV and 25kV networks, making it an excellent choice for modern power infrastructure. Select XLPE-HDPE 25kV Tree Cable 1x300mm² for a long-lasting, low-maintenance, and highly reliable power solution that ensures safe, efficient, and stable electricity transmission across your network.In-Depth Analysis
Overhead Insulated Cable are built to deliver high efficiency, reliable performance, and advanced safety, helping businesses reduce energy costs while ensuring stable power supply. With future-ready adaptability for renewable energy and smart grid applications, they provide a sustainable and innovative solution for today’s and tomorrow’s power needs.
Comparative Analysis of Efficiency and Loss
Compared to the industry average, NPC Overhead Insulated Cable exhibit lower losses and higher efficiency across the entire load range.
Load Efficiency Comparison(%)
No-load Loss Comparison(W)
High Conductivity Design
High-purity oxygen-free copper or high-quality aluminum conductors are used with smooth surface and low resistance to ensure efficient power transmission and reduce energy loss.
Improved Conductivity
+20%
Reduced Energy Loss
-15%
Insulation Protection System
Use flame-retardant, wear-resistant and corrosion-resistant polymer insulation materials to meet the safe operation requirements in different environments.
Withstand Voltage Level
≥1kV
Flame Retardant Grade
VW-1 / IEC 60332-3
Weather-Resistant & Durable Technology
The outer sheath is made of UV-resistant, heat-resistant, and oil-resistant materials, making it suitable for high and low temperatures, humidity, and long-term outdoor use.
Service Life
≥ 25 Years
Operating Temperature Range
-40°C to +90°C
Safe Flame Retardant System
The multi-layered flame-retardant structure effectively slows the spread of flames and releases low-smoke, halogen-free gases during combustion, reducing secondary hazards.
Flame Retardant Performance
IEC 60332 / UL 1581 Qualified
Smoke Density
Low Smoke ≤50%
Easy Installation & Maintenance
The flexible core and flex-resistant outer sheath provide a small bend radius and high installation efficiency. Color coding and length markings reduce installation and maintenance costs.
Bend Radius
≤6D
Installation Efficiency Improvement
+30%
Intelligent Monitoring
An optional remote monitoring system is available to monitor operating status, temperature, load and other parameters in real time, and supports fault warning and remote diagnosis.
Data Collection Frequency
one times a minute
Fault Warning Accuracy
98%
Environmental Adaptability Analysis
NPC Overhead Insulated Cable have been rigorously tested and can operate stably under various harsh environmental conditions.
Temperature Range
-40℃ ~ +55℃
Can work normally in extreme high and low temperature environments
Humidity Adaptation
0 ~ 100% RH
Including condensation environment, no frost requirement
Weather Resistance Grade
UV/IEC 60811-501
The outer sheath has excellent UV resistance and aging resistance
Chemical Corrosion Resistance
Oil / Acid / Alkali
Resistant to oil, acid, alkali and some chemical corrosion environments
Why Choose Us
With 30 years of expertise, global certifications, and advanced manufacturing technology, NPC Electric delivers reliable, high-performance overhead insulated cable trusted by industries worldwide.
Overhead Insulated Cable Manufacturer
NPC Electric is a leading overhead insulated cable manufacturer, specializing in the production of high-quality insulated power cables for overhead power lines and electricity distribution systems. Our overhead insulated cables are designed to provide safety, reliability, and long-term performance in outdoor installations, especially in high voltage and high-current applications. These cables offer excellent corrosion resistance and mechanical strength, ensuring minimal maintenance and increased durability. Made from premium materials and manufactured to international standards, NPC Electric’s insulated cables are perfect for urban, rural, and industrial networks. Our commitment to quality and innovation guarantees the reliable energy delivery and sustainable power distribution you need for any infrastructure project.
Overhead Insulated Cable Benefits
Overhead insulated cables offer several key benefits for power transmission networks. The primary advantage of insulated power cables is their enhanced safety, as they reduce the risk of electrical accidents by providing protection against accidental contact with live wires. These high voltage insulated cables also minimize the impact of environmental factors such as wind, rain, or snow on the transmission network. Corrosion-resistant cables are ideal for coastal areas or regions with high humidity, ensuring longevity and reducing maintenance costs. Additionally, insulated cables improve energy efficiency by minimizing losses and reducing the need for costly repairs. In renewable energy applications, such as solar and wind power systems, overhead insulated cables ensure safe and efficient energy delivery across vast areas.
Overhead Insulated Cable Installation
Overhead insulated cable installation requires careful planning and adherence to safety standards. NPC Electric ensures that our insulated power cables are installed following precise installation procedures, which include proper tensioning, securing to support structures, and maintaining safety clearances in overhead power lines. The high voltage cable installation process is designed to minimize risks and ensure long-term reliability. Once installed, insulated cables require regular maintenance to ensure optimal performance. This includes periodic inspections for damage, corrosion, and insulation wear, as well as testing for voltage endurance and mechanical integrity. NPC Electric’s cable maintenance services guarantee that power transmission networks continue to operate safely, efficiently, and with minimal downtime, ensuring reliable power delivery for urban, rural, and industrial installations.
Testing and Certification
At NPC Electric, every overhead insulated cable undergoes rigorous testing and certification to ensure optimal performance and safety. Our insulated power cables are tested for high voltage endurance, insulation resistance, and mechanical strength to meet IEC and ANSI standards. We conduct comprehensive quality control checks, including dielectric testing, temperature rise testing, and corrosion resistance evaluation to guarantee the durability of our high voltage cables in demanding environments. Each insulated cable is certified to meet international safety standards, ensuring reliable performance in overhead power lines, electricity distribution systems, and renewable energy projects. NPC Electric’s commitment to quality testing and certification ensures long-term, safe power transmission and minimal maintenance requirements.
Product Show
Explore the detailed design and practical application scenarios of overhead insulated cables
Overhead Insulated Cable
overhead cable have colors
Overhead Insulated Cable Color
overhead cable four colors
Aerial Bundled Cable
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Aerial Bundled Cable Core
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Service Drop Cable
service drop cable cores design
Control Cables
control cables product show
Control Cables Structure
control cables structure design
Overhead Insulated SWA Cable
swa cable cores design
Testing and Certification
Tested with precision and certified to meet international standards as
well as strict industry requirements.
Bare Cable Test Report
SGS Inspection Report
Certificate of Acceptance
ISO Quality Certificate
ISO Environmental Certificate
ISO Occupational Certificate
UL Laboratory Certificate
UL Product Certificate
Project Cases
NPC wires and cables have been successfully applied in many projects and have been highly praised by customers.
Peru Solar PV Project
CompletedNPC Electric Delivers Medium-Voltage Cables for Peru Solar PV Project
Country：Peru
Model：HEPRZ1(AS) 1x630 mm² 19/33kV x 6km
Chile El Project
CompletedReliable 19/33kV MV cables ensuring safe, stable, and efficient power transmission for critical projects.
Country：Chile
Model：19/33kV MV Power Cables x 5km
Dominican Edenorte Project
CompletedProvide outdoor power solutions for urban main road reconstruction projects to adapt to complex environments.
Country：Dominican
Model：NPC AAAC Cable & Triplex Cable x 10km
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
FAQ From Customers
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What is the structure of an overhead insulated cable?
Overhead insulated cables typically consist of a conductor, insulation layer, and an optional outer sheath. The conductor is usually made from aluminum or copper, providing excellent electrical conductivity. The insulation layer, made from materials like cross-linked polyethylene (XLPE) or PVC, protects the conductor and prevents accidental contact with live wires. An optional outer sheath is added for additional mechanical protection and durability, particularly in harsh environmental conditions. -
What materials are used for the insulation of overhead insulated cables?
The insulation of overhead insulated cables is typically made from cross-linked polyethylene (XLPE), which offers superior thermal stability, electrical insulation properties, and resistance to environmental factors. Alternatively, PVC (polyvinyl chloride) can be used for lower voltage applications. These materials help prevent electrical hazards by ensuring that the conductor remains safely insulated, especially in outdoor and exposed environments such as overhead power lines. -
How are overhead insulated cables manufactured?
The manufacturing process of overhead insulated cables begins with the conductor preparation, which involves drawing aluminum or copper to the desired size. The insulation layer is then applied using extrusion technology, ensuring uniform thickness and durability. For high voltage cables, the insulation is cross-linked to improve performance at elevated temperatures and resist electrical stress. The outer sheath is then added, providing protection against physical damage and environmental conditions. The entire process follows stringent quality control and testing procedures to ensure reliability and compliance with international standards such as IEC and ANSI. -
What makes overhead insulated cables suitable for high voltage applications?
Overhead insulated cables are suitable for high voltage applications due to their specialized insulation materials such as cross-linked polyethylene (XLPE), which provides excellent electrical strength and thermal stability. These materials prevent the risk of electrical leakage and offer protection against high voltage surges. The cables' mechanical strength and weather-resistant outer sheath ensure long-term durability and performance, even in extreme environments. Additionally, the insulated layers prevent external damage from wind, moisture, and physical contact, making them ideal for high-voltage power transmission. -
How do overhead insulated cables protect against environmental factors?
Overhead insulated cables are designed to withstand environmental challenges such as moisture, extreme temperatures, UV radiation, and mechanical stress. The insulation material, typically XLPE or PVC, offers excellent resistance to corrosion and weathering, ensuring long-lasting performance even in harsh climates. The outer sheath further protects the cable from abrasion, chemical exposure, and physical damage, ensuring that the cables maintain their integrity and electrical safety during their service life.
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