Here's why:

* Excellent conductivity: Copper is an excellent conductor of electricity, meaning it allows electrical current to flow through it easily with minimal resistance. This makes it ideal for transmitting electricity over long distances.

* Ductility: Copper is highly ductile, meaning it can be drawn into thin wires without breaking. This makes it easy to manufacture into the long, thin strands needed for wiring.

* Abundant and affordable: Copper is relatively abundant and readily available, making it cost-effective for widespread use.

While other materials like aluminum are also used in electrical wiring, copper remains the dominant choice due to its superior conductivity and workability.