CCA-62% IACS: Standard Specifications and Applications
1. Introduction
1.1 Grade Overview
CCA-62% is the most common and cost-effective copper-clad aluminum grade:
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MEDIA TODO1.2 Market Position
CCA-62% accounts for approximately 70% of all CCA production.
2. Material Specifications
2.1 Composition
2.2 Standards Compliance
Complies with ASTM B566, IEC 62602, UL 758, and other standards.
3. Electrical Properties
3.1 Conductivity Requirements
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MEDIA TODO3.2 Resistance Values
3.3 Ampacity
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MEDIA TODO4. Mechanical Properties
4.1 Tensile Properties
4.2 Bending Properties
5. Dimensional Standards
Standard AWG sizes range from 8 AWG to 24 AWG.
6. Application Guidelines
7. Comparison with Higher Grades
CCA-62% is the standard grade, while CCA-70% and CCA-80% offer higher conductivity.
8. Conclusion
CCA-62% is the ideal choice for cost-sensitive applications, offering the best balance between conductivity and cost.
Frequently Asked Questions
What is CCA-62%?
CCA-62% is the standard grade of Copper-Clad Aluminum with a minimum conductivity of 62% IACS. It consists of an aluminum core clad with a copper layer, manufactured using the Clad & Weld process with metallurgical bonding.
What applications are suitable for CCA-62%?
CCA-62% is suitable for building wiring (where permitted), coaxial cables, grounding conductors, and low-voltage applications. It offers the best cost-to-performance ratio among CCA grades.
How does CCA-62% compare to pure copper?
CCA-62% has approximately 62% of copper's conductivity, 59% lower weight, and 35-40% lower cost. For applications not requiring maximum conductivity, it provides an excellent alternative.
What is the derating factor for CCA-62%?
CCA-62% typically requires a derating factor of 0.80 for ampacity calculations, meaning it can carry approximately 80% of the current that a same-sized copper conductor can carry.
Figures
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Tables
| Component | Specification | Typical Value |
|---|---|---|
| 芯材 | 铝1350 | ≥99.5% Al |
| 包覆层 | 铜 | ≥99.9% Cu |
| 铜体积比 | 10-15% | 12-14% |
| Property | Requirement | Typical Value |
|---|---|---|
| 直流导电率 | ≥62% IACS | 63-65% IACS |
| 电阻率(20°C) | ≤2.78 μΩ·cm | 2.65-2.75 μΩ·cm |
| 温度系数 | 0.0040/°C | - |
| Temper | UTS (MPa) | YS (MPa) | Elongation (%) |
|---|---|---|---|
| 退火(A) | 170-200 | 60-90 | 15-25 |
| 半硬(H) | 220-260 | 180-220 | 5-10 |
| 硬态(H) | 280-320 | 250-290 | 2-5 |
| AWG | Copper (A) | CCA-62% (A) | Derating Factor |
|---|---|---|---|
| 14 | 15 | 12 | 0.80 |
| 12 | 20 | 16 | 0.80 |
| 10 | 30 | 24 | 0.80 |
| Application | Suitability | Notes |
|---|---|---|
| 建筑导线 | 适用 | 符合当地法规 |
| 同轴电缆 | 适用 | 高频优势 |
| 电机绕组 | 有限 | 需评估温升 |
| 接地导体 | 适用 | 成本效益 |
References
- ASTM B566-04: Copper-Clad Aluminum Wire ASTM (2020)
- IEC 62602: Copper-clad aluminum for electrical purposes IEC (2022)
- UL 758: Appliance Wiring Material UL (2021)