Wires and Cables
Tree Cable
Tree cable, often referred to as XLPE-HDPE tree cable, is a specially designed medium-voltage power cable that combines cross-linked polyethylene (XLPE) insulation with a high-density polyethylene (HDPE) jacket. The term “tree cable” comes from its ability to resist electrical treeing—a degradation process in insulation that can lead to breakdown over time. By using advanced insulation materials and protective layers, tree cables provide excellent durability, moisture resistance, and long-term reliability in distribution networks. They are widely applied in 25kV overhead and underground systems, offering utilities a safe and efficient solution for power transmission.
XLPE-HDPE Tree Cable Aluminum 25kV 1x35mm²
The XLPE-HDPE Tree Cable Aluminum 25kV 1x35mm² is specifically engineered for medium-voltage overhead distribution systems, particularly in densely wooded areas or locations with limited installation space. Manufactured in compliance with ASTM B230, ASTM B232, and ICEA S-121-733 standards, this cable features an aluminum alloy conductor, cross-linked polyethylene (XLPE) insulation, and a high-density polyethylene (HDPE) outer sheath, ensuring outstanding electrical performance, mechanical durability, and environmental resistance. The HDPE outer sheath provides strong protection against UV radiation, weathering, and mechanical abrasion, while significantly reducing the risk of power outages caused by tree branch contact and electrical sparking. The XLPE insulation layer guarantees stable dielectric performance at continuous operation temperatures up to 90°C, and the 1350 aluminum alloy compact conductor offers a lightweight yet high-conductivity solution, meeting the reliability requirements of medium-voltage power distribution.
XLPE-HDPE Tree Cable Aluminum 25kV 1x50m㎡
The XLPE-HDPE Tree Cable Aluminum 25kV 1x50mm² is engineered for superior performance in medium-voltage overhead distribution networks, delivering exceptional reliability and long-term durability. Designed for challenging environments such as forested regions and urban areas, this cable ensures consistent power supply while minimizing maintenance and unplanned outages. Constructed with high-conductivity aluminum alloy 1350 wires, the cable features a round compacted conductor with class 2 stranding, achieving a minimum conductivity of 61% IACS and tensile strength of at least 130 MPa. Optional conductor shielding with an extruded semiconductor thermosetting compound is available for enhanced performance in 15kV and 25kV applications. The inner insulation is made from cross-linked polyethylene (XLPE), supporting continuous conductor operation at 90°C, and meeting ICEA S-121-733 physical standards. The robust outer cover is composed of high-density polyethylene (HDPE), offering outstanding resistance against weathering, UV radiation, mechanical abrasion, and electrical sparking up to 2.75kV. Standard cables come in gray with sequential metering markings in accordance with ASTM B230, while blue cables are recommended for harsher conditions requiring spark resistance above 5kV.
XLPE-HDPE Tree Cable Aluminum 25kV 1x70mm²
The XLPE-HDPE Tree Cable Aluminum 25kV 1x70mm² is specially designed for medium-voltage overhead distribution systems that demand higher load capacity. Its robust construction ensures outstanding performance and reliability even in harsh outdoor conditions, making it ideal for wooded areas, semi-urban environments, and locations where maintenance and tree-trimming need to be minimized. The conductor is made from high-conductivity aluminum alloy 1350 wires, round compacted with class 2 stranding, achieving a minimum conductivity of 61% IACS and a tensile strength of at least 130 MPa. Optional conductor shielding with an extruded semiconductor thermosetting compound is available for 15kV and 25kV applications, providing enhanced electrical performance. This 25kV XLPE-HDPE tree cable delivers reliable, eco-friendly power distribution with reduced maintenance needs. Its combination of high current capacity, environmental resilience, and long service life makes it a perfect solution for medium-voltage overhead networks in challenging outdoor settings.
XLPE-HDPE Tree Cable Aluminum 25kV 1x95mm²
The XLPE-HDPE Tree Cable Aluminum 25kV 1x95mm² is engineered for medium-voltage overhead distribution networks that demand very high current capacity. Ideal for long-distance transmission in rural, industrial, and high-demand urban areas, this cable provides exceptional reliability and performance under harsh environmental conditions. Its design minimizes energy losses, supports stable power supply, and ensures dependable large-scale power distribution. Constructed with high-conductivity aluminum alloy 1350 wires, the conductor features round compacted, class 2 stranding with a 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. With its high current capacity, robust construction, and environmental resilience, the XLPE-HDPE 25kV tree cable 1x95mm² delivers reliable, long-term power distribution for challenging overhead network applications.
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
abc cable design cores
Aerial Bundled Cable Core
abc cable font view cores
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 a tree cable made of?
A tree cable is composed of three main layers: the power cable conductor, an insulation layer, and a sheath protective layer. The power cable conductor is made of one or more aluminum-containing conductors that are stranded together. The insulation layer is extruded onto the conductor and is made of irradiated cross-linked polyethylene to ensure electrical insulation. The sheath protective layer is applied to the insulation and is made from high molecular weight polyethylene, providing protection against weathering and tracking resistance. -
What is the purpose of the insulation layer in a tree cable?
The insulation layer in a tree cable is designed to provide electrical insulation to prevent electrical leakage and ensure the safety of the power transmission. It is made of irradiated cross-linked polyethylene, which offers excellent thermal stability, electrical strength, and durability. This insulation prevents contact between the conductive core and the environment, reducing the risk of electrical faults and ensuring safe operation in various weather conditions. -
Why is the sheath protective layer important in a tree cable?
The sheath protective layer in a tree cable provides an additional layer of protection to ensure the cable’s mechanical integrity and weather resistance. Made of high molecular weight polyethylene, this layer helps protect the cable from abrasion, UV radiation, and environmental stresses such as moisture and extreme temperatures. It also provides tracking resistance, ensuring the cable remains functional and safe for long-term outdoor use in tree cabling applications. -
What materials are used in the power cable conductor of a tree cable?
The power cable conductor in a tree cable is made of one or more aluminum-containing conductors that are stranded together. This choice of material ensures excellent electrical conductivity while keeping the cable lightweight and cost-effective. The use of aluminum also helps improve the cable's corrosion resistance, making it ideal for outdoor installations in environments where moisture and temperature fluctuations are common. -
How does the construction of a tree cable benefit its performance?
The construction of a tree cable, with its layered design of power cable conductor, insulation layer, and sheath protective layer, provides several key benefits. The aluminum conductor ensures efficient electrical power transmission, while the insulation layer prevents electrical faults by providing excellent insulation. The sheath protective layer adds durability by making the cable resistant to weathering, abrasion, and tracking, ensuring long-lasting performance and minimal maintenance, even in challenging outdoor environments.
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