What is the difference between copper core and aluminum core of cable? Which is better?

There are several ways to distinguish whether the wire core is copper core or aluminum core

First, from the model of the wire, the meaning of the letters in the model is as follows:

B - fixed laying;

X - rubber insulation;

L - aluminum core (copper core without letters);

W - Neoprene sheath;

Y - polyethylene sheath.

For example: bxw - copper core rubber insulated chlorine protective sheath wire;

Blxw - aluminum core rubber insulated chlorine protective sheath wire.

Secondly, it is intuitively distinguished from the core material of the wire. The core of the copper core wire is made of copper; Because copper is golden and aluminum is white. You can use a knife to peel a little wire skin directly, watch the wire core and check the color to distinguish whether it is copper core or aluminum core.

The difference between aluminum core and copper core of wires and cables

The cut-off flow of copper wire and aluminum wire is different;

Aluminum wire is relatively cheap;

Aluminum wire is lighter;

The mechanical strength of aluminum wire is poor;

The aluminum wire is very easy to oxidize at the connecting wire end, and the temperature rise is easy to occur after the connecting wire end is oxidized

The internal resistance of copper wire is small. Aluminum wire has larger internal resistance than copper wire, but it dissipates heat faster than copper wire; Mainly due to different electric carrying capacity and mechanical strength. The resistivity of copper core is 0.017 and that of aluminum core is 0.029. Therefore, the current carrying capacity of aluminum is about 80% of that of copper. Physical strength copper is much better.

Comparison of advantages and disadvantages between copper core wire and cable and aluminum core wire and cable

Low resistivity of copper core: the resistivity of aluminum core is about 1.68 times higher than that of copper core;

Copper core has good ductility;

High temperature resistance of copper core: the allowable stress under normal temperature can reach 20 for copper and 15.6kgt/mm2 for aluminum;

Copper core fatigue resistance: aluminum core wires are easy to break after repeated bending, while copper is not easy;

Copper core cable has strong stability and corrosion resistance; The copper core can resist oxidation and corrosion, while the aluminum core is easy to be oxidized and corroded, and it often breaks down soon.

Hope to help you! It is suggested to continue to pay attention to Ruiyang cable for more information.