Copper core cable and aluminum core cable difference

One weight difference copper is heavier than aluminum. The specific gravity of copper is 8.9 g.cm3, and the specific gravity of aluminum is 2.7 g/cm3, that is, in the case where the conductor specifications are the same, the weight of the copper conductor is 3.3 times that of the aluminum conductor. However, the conductivity of aluminum is only 61% of copper, that is, the cross section of the aluminum conductor is 61% larger than that of the copper conductor under the same transmission current. Therefore, in terms of the weight of the conductor, in order for the two conductors to have the same current carrying capacity, the required copper conductor has a weight approximately twice that of the aluminum conductor.

Second, the cost difference The price ratio of copper and aluminum is about 3.5, so the cost of the copper conductor is seven times that of the aluminum conductor.

Third, the difference in conductivity Because the cable products are products with standard conductor specifications, it is impossible to buy aluminum core cables with the same conductivity and copper core cables. Therefore, if a cable is made of an aluminum conductor, it is necessary to use an aluminum conductor having a larger cross section. Experience has shown that in the case of equal current carrying capacity, the conductor cross section of the aluminum core cable should be twice the cross section of the copper core cable conductor. That is to say, the price advantage of aluminum and copper is not significant, because the conductor is only a small part of the overall cable cost.

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