The main component of a cable is its internal core wire, and the material chosen for the core wire is often between copper and aluminum. So, what are the differences between copper core and aluminum core cables?
Comparison of Aluminum Wire and Copper Wire:
1. Copper and aluminum wires have different current-carrying capacities;
2. Aluminum wire is relatively cheaper;
3. Aluminum wire is lighter;
4. Aluminum wire has lower mechanical strength;
5. Aluminum wire oxidizes very easily at the splice ends, leading to increased temperature;
6. Copper wire has lower internal resistance. Aluminum wire has higher internal resistance than copper wire, but dissipates heat faster. The main differences lie in current-carrying capacity and mechanical strength.
Comparison of advantages and disadvantages between copper core cables and aluminum core cables:
Copper core has lower resistivity: The resistivity of aluminum core is approximately 1.68 times higher than that of copper core; Copper core has better ductility; Copper core has higher strength: At room temperature, the allowable stress of copper can reach 20, while that of aluminum is 15.6 kgt/mm²; Copper core is more fatigue-resistant: Aluminum is prone to breakage after repeated bending, while copper is not; Copper core has better stability and corrosion resistance: Copper core is resistant to oxidation and corrosion, while aluminum core is easily oxidized and corroded.
In summary, although aluminum core cables have a price advantage, copper core cables offer better current carrying capacity, mechanical strength, and stability in terms of performance. Therefore, copper core cables are recommended for applications requiring higher performance. Aluminum core cables can be considered for cost-sensitive applications with lower performance requirements. Ultimately, the appropriate cable type should be determined based on the specific operating environment, laying conditions, and safety requirements.