Introduction
In today’s modern world, where power grid stability, safety, and the reduction of maintenance costs have become top priorities for distribution companies and contractors, Aerial Bundled Cables (ABC) are recognized as one of the most significant developments in the electrical power industry. If you take a look at newly developed urban areas, mountainous regions, or power network renovation projects, you will certainly notice neatly arranged bundles of black cables passing over power poles without disorder; these are Aerial Bundled Cables.
In this article, relying on technical knowledge, engineering standards, and the experience of Sama Copper Rod Wire Manufacturing, we present a fully comprehensive and reference guide on Aerial Bundled Cables—from their definition and technical structure to their types, advantages, disadvantages, and real-world applications in Iran’s power distribution network.
What Is an Aerial Bundled Cable and Why Was It Developed?
An Aerial Bundled Cable (ABC) is a set of insulated aluminum conductors that are twisted together and installed on power poles using a supporting wire known as a messenger. Unlike traditional copper conductors, which were bare and mounted on insulators, all conductors in an ABC system are covered with thick insulation.
Philosophy of Development
The idea of using Aerial Bundled Cables dates back to the 1950s in Europe, when the passage of power lines through forests and densely populated urban areas led to frequent short circuits, fires, and power outages. ABC cables were an engineering response to these challenges.
In Iran as well, due to:
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The sharp increase in copper prices
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Widespread theft of copper equipment
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The need for higher safety in worn-out and old urban areas
aluminum Aerial Bundled Cables have become the gold standard for power distribution networks.
Technical and Engineering Structure of Aerial Bundled Cables
A standard Aerial Bundled Cable consists of three main components:
Conductor
In the cables produced by Sama Copper Rod Wire Manufacturing, high-purity hard-drawn aluminum alloy – grade 1350 – is used. This alloy simultaneously provides:
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Good electrical conductivity
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Significantly lower weight compared to copper
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Reduced mechanical load on power poles
Insulation
The insulation used is cross-linked polyethylene (XLPE), which offers the following advantages:
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Continuous operating temperature up to 90°C
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Short-circuit temperature resistance up to 250°C
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Excellent resistance to solar ultraviolet (UV) radiation
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No melting or deformation like PVC
Messenger (Supporting Wire)
The messenger is responsible for bearing the entire tensile load of the cable:
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In low-voltage (LV) cables: reinforced aluminum (AAAC) is commonly used, which also serves as the neutral conductor.
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In some medium-voltage (MV) structures: galvanized steel is used to withstand higher mechanical stresses.
Types of Aerial Bundled Cables Based on the Number of Cores
Variation in the number of cores allows for precise selection of the appropriate cable according to project requirements:
2-Core Cable
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Includes one phase and one neutral
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Suitable for single-phase service connections (from pole to customer meter)
3-Core Cable
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One phase
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One street lighting conductor
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One supporting neutral conductor
4-Core Cable
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Three phases + one neutral
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Suitable for small-scale three-phase distribution networks
5-Core Cable (Most Common Urban Type)
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Three phases
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One street lighting conductor
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One neutral/messenger
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The primary choice for urban power distribution networks in Iran
6-Core Cable (Most Advanced Structure)
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Three phases
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One lighting conductor
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One independent neutral
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One separate messenger
Important Technical Note
In 6-core cables, separating the neutral from the messenger results in higher electrical stability and reduced network voltage fluctuations.
Coding Example
3×70 + 25 + 70 + 16
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Phases: 70 mm²
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Lighting: 25 mm²
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Neutral: 70 mm²
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Messenger: 16 mm²
Classification of Aerial Bundled Cables Based on Voltage Level
Low Voltage (LV) Aerial Bundled Cable
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Operating voltage: up to 1 kV (urban 400 V systems)
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Most widely used in urban and rural areas
Medium Voltage (MV) Aerial Bundled Cable
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Operating voltage: from 1 kV to 63 kV
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Features a more complex structure, including:
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Inner and outer semiconductive layers
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Main XLPE insulation specifically designed for MV applications
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Metallic shielding (copper or aluminum)
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These cables are used for intercity transmission and distribution as well as in special regions.
Main Applications of Aerial Bundled Cables
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Old and narrow urban neighborhoods
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Mountainous and hard-to-access areas
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Forested and tree-dense regions
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Lightning-prone areas and locations with harsh weather conditions
Important Note:
Aerial Bundled Cables are not designed for underground installation and must be used exclusively in overhead power lines.
Strategic Advantages of ABC Cables
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Engineering economy: reduced installation costs, elimination of insulators and excavation
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High safety: elimination of electrocution and fire hazards
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Theft reduction: lower economic value compared to copper
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Network stability: lower voltage drop and more stable performance
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Environmental resistance: high durability against moisture, UV radiation, and storms
Challenges and Limitations (Transparent and Realistic)
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Higher initial cost compared to bare conductors
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Requirement for standard fittings and accessories
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Necessity of proper installation (clamps, tensioning, bending radius)
These challenges are fully manageable through the selection of high-quality cables and proper installation practices.
Frequently Asked Questions (FAQ)
Is the Aerial Bundled Cable a complete replacement for copper conductors?
Yes. In overhead distribution networks, aluminum ABC cables have fully replaced bare copper conductors and provide superior safety, cost efficiency, and operational stability.
What is the service life of Aerial Bundled Cables?
When high-quality XLPE insulation is used and proper installation is ensured, the service life of ABC cables is typically estimated to exceed 30 years.
Are ABC cables suitable for hot and sunny regions?
Yes. XLPE insulation has excellent resistance to UV radiation and high temperatures, making it fully suitable for Iran’s climatic conditions.
What is the difference between 5-core and 6-core ABC cables?
In 6-core cables, the neutral and messenger are separated, resulting in higher electrical stability and reduced network voltage fluctuations.
Are ABC cables suitable for underground installation?
No. These cables are specifically designed for overhead lines and are not recommended for direct burial underground.
Final Conclusion and Call to Action
Aerial Bundled Cables (ABC) are not merely a replacement for old conductors; they represent an engineered, safe, and cost-effective solution for the future of power distribution networks. The combination of high-grade aluminum, XLPE insulation, and standardized design has made these cables the first choice for urban, rural, and industrial projects.
Sama Copper Rod Wire Manufacturing, leveraging advanced technology, strict quality control, and full compliance with national and international standards, is ready to supply a wide range of low-voltage and medium-voltage Aerial Bundled Cables for your projects.
📞 For technical consultation, price inquiries, and selection of the most suitable cable for your project, contact the experts at Sama Copper Rod Wire Manufacturing.