Electricity not conducted by copper wire
My guess is the "EN" of the code means "Enamelled" - I.e., it's coated with enamel.

That kind of wire is meant for winding transformers, inductors, and electromagnets etc.  The enamel coating insulates the wire and stops a coil turning into a single lump of copper.

You need to remove the enamel from the ends of the wire, either with a small craft knife, or burn it away using a hot soldering iron and solder.