New technology enamel copper wire use for transformer manufacture are produced from wire-rod, a basic semi-fabrication now obtained by the high-speed continuous casting and rolling of molten copper.  Most of high voltage copper strips instead of copper wire. But Enameled Copper wire is also the hot products for transformers and motors winding, like 25SWG 0.5mm enamel copper magnet wire suitable for winding RF transformers on ferrite. 

Enameled Flat Copper Wire
Enameled Round Copper Wire

Enamel copper wire is suitable for most general purpose electronic construction of transformers and inductors.

What are transformer coils made of?Transformer coils are wound from copper conductors, mainly in the form of round wire and rectangular strip. The efficiency of a transformer is crucially dependent on copper purity and the way in which the coils are assembled and packed into it.

How are Transformers insulated? The copper wires and strips used for transformer manufacture are insulated with a coating of thermosetting enamel, paper or synthetic materials. It is important that the insulation material is as thin and as efficient as possible to avoid unnecessary waste of space.

Why choose copper for transformer design and manufacturing?The empty space around and between the conductors also needs to be reduced to as small as possible. Although high purity copper has been available for many years, a series of recent innovations in the way in which copper is fabricated have greatly improved transformer design, manufacturing processes and performance.

Previous：passed ul cheap enamel insulated copper wire
Next：uew copper round insulation wire