Copper is one of the oldest known materials. Its ductility and electrical conductivity were exploited by the early experimenters with electricity, such as Ben Franklin and Michael Faraday. Copper was the conductor used in inventions such as the telegraph, telephone and electric motor.
Advantages of copper wiring:
Various Advantages of Copper winding are listed below:
Stronger than aluminium
Copper is stronger than aluminium. It expands less but both materials have a similar maintenance schedule.
Higher Current carrying capacity
Copper can carry almost twice the current capacity of aluminium, which makes them slightly smaller in size than aluminium wound transformers.
Transformer with copper winding less expensive
In rare cases, transformers with copper winding can be less expensive to manufacture because they are smaller. But this is open to the fluctuating copper prices.
No Galvanic corrosion
Cu wires can be connected to each other and other metal conductors easily. There is no Galvanic corrosion as observed in Al connections.
Smaller winding size
Al has more resistivity than Cu, so Al winding size increases.
Easy to repair broken wire connection
Al winding repairs when broken is much more difficult as it cannot be soldered. Special procedures need to be followed for Al connections.
Disadvantages of copper wiring:
Copper is much more expensive than aluminum. When an elaborate amount of wiring is required for a job, the overall costs of using copper may prove to be prohibitive. It is also much heavier than its aluminum counterpart which can add to the complexity of the installation. Copper wiring requires a bit more support over long distances to keep in place. This could also add up in cost in larger installs.
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