Vitreous enamel coatings are used primarily for art work over copper.

I've always assumed that our calls are private when on the VPN, but fully hackable over copper.

Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

Contractors are also using a larger gauge aluminum building wire for low voltage feeders where the savings over copper is significant due the lower weight.

Latency over optical and copper are both almost the speed of light.

In this edition, the rust monster consumed all metal, although it still preferred ferrous metals over copper, gold or platinum.

Its durability over copper meant that it was used to make many tools from farming pieces to weaponry.

Several varieties of Ethernet were specifically designed to run over 4-pair copper structured cabling already installed in many locations.

Cellular telephones transmit phone calls with radio signals instead of by electric current over copper wires.

The chips required to support 10GE over copper are indeed integrated into the port and not the cable.