Enamelled winding wire (also called magnet wire or winding wire) is a copper or aluminium conductor coated with a thin, continuous layer of polymer insulation — typically polyester, polyesterimide, or polyamide-imide enamel. This enamel film allows closely wound coils to carry current without conductor-to-conductor short circuits, making it the fundamental building block of every motor, transformer, generator, and electromagnetic coil.

The thermal class of enamelled winding wire — Class B (130°C), Class F (155°C), Class H (180°C), or Class C (220°C+) — determines the maximum permissible operating temperature of the winding. Choosing the wrong thermal class leads to premature enamel breakdown, turn-to-turn short circuits, and winding failure. BMI Cables manufactures enamelled copper winding wire and enamelled aluminium winding wire as per IS 13730 and IEC 60317, giving motor OEMs and transformer manufacturers a single, reliable source for certified winding wire across all thermal grades.

Whether you’re rewinding industrial motors, manufacturing distribution transformers, winding solenoid coils, or producing pump motors in volume — enamelled winding wire quality directly determines the service life of your end product. BMI’s manufacturing process ensures uniform enamel build, tight diameter tolerance, and high dielectric strength across every spool.