The presence of any electrical insulating covering — plastic, rubber, enamel, or similar — moves the product out of 7413 and into the chapter covering insulated wire and cable. Bare stranded copper, even if coated with a non-insulating protective layer such as tin plating, remains in 7413 as long as no insulating function is provided.

Yes. The heading explicitly includes plaited bands and similar articles of copper, not just conventional round-strand cable. The key requirement is that the article be mechanically assembled from copper wire or strip and not be electrically insulated.