All-Aluminum Conductor (AAC) cables are widely used in overhead power transmission and distribution. Known for their lightweight structure, high conductivity, and corrosion resistance, AAC cables play a crucial role in modern electrical infrastructure. This guide will provide an in-depth look into AAC cable , their applications, specifications, advantages, and technical details.
What is AAC Cable?
AAC (All-Aluminum Conductor) is a stranded conductor made entirely of aluminum wires. It is designed for power transmission and distribution in areas where high conductivity and corrosion resistance are essential. Unlike ACSR (Aluminum Conductor Steel Reinforced) cables, AAC does not contain a steel core, making it more flexible but less strong.
Key Features of AAC Cable:
Material: 1350 aluminum (high conductivity)
Stranding: Multiple aluminum wires twisted together
Conductivity: High electrical efficiency
Weight: Lighter than ACSR cables
Corrosion Resistance: Excellent performance in coastal and industrial environments
AAC Cable Construction & Standards
AAC cables are manufactured according to various international standards to ensure quality and performance.
| Property | Specification |
|---|---|
| Material | EC Grade 1350 Aluminum |
| Number of Strands | Varies (7, 19, 37, etc.) |
| Conductor Type | Stranded Aluminum |
| Standard Compliance | ASTM B231, IEC 61089, BS 215 |
Types of AAC Cables
AAC cables are available in different sizes and strand configurations, commonly named after birds or metals:
AAC Ant
AAC Sparrow
AAC Drake
AAC Oriole
These names help differentiate conductor sizes and current-carrying capacities.
Applications of AAC Cable
AAC cables are preferred in specific environments due to their electrical and mechanical properties.
Where is AAC Cable Used?
✔ Urban Power Distribution: Used in cities and towns where spans are short.
✔ Overhead Transmission Lines: Applied in areas where high strength is not the primary requirement.
✔ Coastal and Industrial Areas: Highly resistant to corrosion from salt and pollutants.
✔ Temporary Power Supply: Used in construction sites and emergency power setups.
AAC vs. ACSR vs. AAAC: Which One to Choose?
Each type of aluminum conductor has distinct properties. Below is a comparative analysis:
| Feature | AAC (All-Aluminum Conductor) | ACSR (Aluminum Conductor Steel Reinforced) | AAAC (All-Aluminum Alloy Conductor) |
|---|---|---|---|
| Material | Pure Aluminum | Aluminum + Steel Core | Aluminum Alloy |
| Conductivity | High | Moderate | High |
| Strength | Low | High | Medium |
| Corrosion Resistance | Excellent | Moderate | Excellent |
| Weight | Light | Heavier | Light |
| Best For | Short distances, urban areas | Long spans, high tension lines | Medium spans, corrosion-prone areas |
When to Choose AAC Over Other Conductors?
If high conductivity is the priority
If corrosion resistance is crucial (e.g., coastal areas)
If mechanical strength is not a primary concern
Advantages of AAC Cable
✔ High Conductivity: 61% IACS (International Annealed Copper Standard)
✔ Lightweight: Easier to transport and install
✔ Corrosion Resistance: Performs well in humid and salty environments
✔ Cost-Effective: Lower material cost compared to ACSR
Technical Specifications of AAC Cable
Understanding the technical aspects of AAC cables ensures proper selection for specific applications.
Common AAC Cable Sizes and Properties
| Conductor Size (mm²) | Stranding | Diameter (mm) | Current Capacity (A) | Weight (kg/km) |
|---|---|---|---|---|
| 50 | 7/2.14 | 6.42 | 150 | 135 |
| 100 | 19/2.14 | 10.7 | 260 | 270 |
| 200 | 19/3.04 | 15.2 | 450 | 540 |
| 400 | 37/3.00 | 21.0 | 800 | 1080 |
FAQs About AAC Cable
1. What is the difference between AAC and ACSR cable?
AAC is made of pure aluminum and has higher conductivity, while ACSR includes a steel core for added strength. ACSR is better for long spans, whereas AAC is ideal for short distances.
2. Can AAC cables be used for high-voltage applications?
Yes, AAC cables are used in high-voltage distribution systems, but they are best suited for short-distance transmission.
3. Is AAC cable suitable for underground applications?
AAC is primarily designed for overhead use. For underground applications, insulated cables like XLPE-covered conductors are preferred.
4. How does AAC cable perform in coastal environments?
AAC cables have excellent corrosion resistance, making them ideal for coastal and industrial settings.
5. What factors should be considered when selecting AAC cable?
Required current-carrying capacity
Span length and mechanical load
Environmental conditions (corrosion exposure)
Compliance with industry standards
Installation & Maintenance of AAC Cable
How to Install AAC Cable?
✔ Step 1: Select Proper Size – Ensure the cable meets the required load capacity.
✔ Step 2: Use Proper Tension – Avoid excessive sagging or over-tightening.
✔ Step 3: Secure Connections – Use high-quality clamps and connectors.
✔ Step 4: Perform Routine Inspections – Check for wear and corrosion periodically.
Maintenance Tips
Regularly inspect for loose connections
Monitor for oxidation and corrosion
Ensure proper tensioning to prevent sagging
Use protective coatings in high-pollution areas
How to Buy AAC Cable?
When purchasing AAC cables, consider the following:
✔ Voltage Rating & Load Requirements
✔ Compliance with International Standards (ASTM, IEC, BS)
✔ Supplier Reputation & Certification
✔ Competitive Pricing & Availability
