Magnet wire is a thin, solid-core conductor that has a clear coating of enamel. This enamel acts as an electrical insulator. The usual way to strip away the enamel and reveal the shiny copper ...

When Field's first cable was constructed, it had three layers of gutta-percha insulation wrapped around a core of seven strands of copper wire. In all, 300 tons of gutta-percha were used for the ...