GB/T 29197 Standard Interpretation
1. Standard Overview
1.1 Basic Information
| Item | Details |
|---|---|
| Standard Number | GB/T 29197-2012 |
| Standard Name | CCA (Copper-Clad Aluminum Wire) |
| Publisher | Standardization Administration of China |
| Implementation Date | July 1, 2013 |
| Standard Type | Recommended national standard |
1.2 Standard Positioning
| Position | Description |
|---|---|
| Domestic market | Unified technical specification |
| Trade basis | Quality supervision and acceptance |
| International alignment | Harmonized with international standards |
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MEDIA TODO2. Product Classification
2.1 By Conductivity
| Grade Code | Conductivity (%IACS) | Copper Volume (%) |
|---|---|---|
| CCA-15 | 62 | 15 |
| CCA-20 | 70 | 20 |
| CCA-25 | 80 | 25 |
2.2 By Temper
| Temper Code | Name | Characteristics |
|---|---|---|
| O | Annealed | Soft, easy to process |
| H | Hard | High strength, for overhead use |
2.3 By Application
| Category | Code | Typical Application |
|---|---|---|
| Electrical | E | Wire and cable conductors |
| Electronic | EC | Electronic wire, coils |
3. Technical Requirements
3.1 Dimensional Specifications
| Series | Specifications (mm) |
|---|---|
| Fine wire | 0.10, 0.12, 0.15, 0.18, 0.20... |
| Medium wire | 0.50, 0.60, 0.80, 1.00, 1.20... |
| Coarse wire | 3.00, 4.00, 5.00, 6.00... |
3.2 Tolerance Requirements
| Diameter Range (mm) | Tolerance (mm) |
|---|---|
| 0.10-0.40 | ±0.004 |
| 0.41-1.00 | ±0.008 |
| 1.01-2.50 | ±0.015 |
| 2.51-5.00 | ±0.025 |
| 5.01-8.00 | ±0.040 |
3.3 Mechanical Properties
| Temper | Diameter (mm) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Hard (H) | ≤0.50 | 138-207 | ≥1.0 |
| Hard (H) | 0.51-1.00 | 124-193 | ≥1.5 |
| Annealed (O) | ≤1.00 | ≤152 | ≥8.0 |
| Annealed (O) | >1.00 | ≤138 | ≥10.0 |
3.4 Electrical Properties
| Diameter (mm) | CCA-15 (Ω/km) | CCA-20 (Ω/km) | CCA-25 (Ω/km) |
|---|---|---|---|
| 0.50 | 0.136 | 0.121 | 0.105 |
| 1.00 | 0.034 | 0.030 | 0.026 |
| 1.50 | 0.015 | 0.013 | 0.012 |
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MEDIA TODO4. Test Methods
4.1 Dimensional Measurement
| Parameter | Specification |
|---|---|
| Tool | Outside micrometer |
| Accuracy | 0.001mm |
| Method | Two perpendicular measurements |
4.2 Resistance Test
| Parameter | Specification |
|---|---|
| Standard | GB/T 3048.4 |
| Method | Four-wire method |
| Temperature correction | Convert to 20°C |
4.3 Copper Layer Measurement
| Method | Standard |
|---|---|
| Metallographic | GB/T 6462 |
| Eddy current | Quick detection |
| Weight method | Volume calculation |
5. International Comparison
5.1 vs ASTM B566
| Aspect | GB/T 29197 | ASTM B566 |
|---|---|---|
| Conductivity grades | 3 levels (62/70/80) | 4 levels (62/70/80/90) |
| Copper volume definition | Different from ASTM | Standard definition |
| Size series | Primarily metric | Imperial + metric |
| Test methods | References GB standards | ASTM methods |
5.2 vs IEC 62641
| Aspect | GB/T 29197 | IEC 62641 |
|---|---|---|
| Conductivity grades | Basically equivalent | Basically equivalent |
| Test methods | References GB | References IEC |
| International recognition | Primarily China | International |
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MEDIA TODO6. Conclusion
6.1 Summary
| Aspect | Key Point |
|---|---|
| Scope | Comprehensive CCA wire specification for China |
| Alignment | Harmonized with international standards |
| Application | Quality control and trade acceptance |
6.2 Implementation Guidance
- Verify conductivity grade matches order requirements
- Check appearance quality and dimensions
- Review test reports and sample key parameters
7. References
- GB/T 29197-2012 CCA
- ASTM B566-04(2020) Standard Specification for Copper-Clad Aluminum Wire
- IEC 62641:2013 Copper-clad aluminium for electrical purposes
Frequently Asked Questions
What is the difference between GB/T 29197 and IEC 62641?
GB/T 29197 is the Chinese national standard primarily used in the domestic market, while IEC 62641 is an international standard. Both are technically equivalent for conductivity grades, but GB/T 29197 references Chinese GB test methods, whereas IEC 62641 references IEC methods. For export markets, IEC 62641 certification is recommended.
Is GB/T 29197 certification mandatory in China?
GB/T 29197 is a recommended (not mandatory) national standard. However, it is widely used as the technical basis for product quality acceptance, tender requirements, and CCC certification for cable products using CCA conductors.
How to select the right CCA grade according to GB/T 29197?
Select based on application requirements: CCA-15 for general low-voltage distribution and building wiring, CCA-20 for coaxial cables and high-frequency applications, and CCA-25 for applications requiring higher conductivity. Consider both electrical performance and cost-effectiveness.