Practical implementation of windings
Winding of AC rotating machines

Low-voltage machines are usually wound using unordered enamelled cylindrical wire (random winding or mush winding). Each conductor, used to form the windings, is usually made up of several wires, or strands, in parallel. To optimize slot filling, these wires can be of different diameters.

Conductors made in this way are not insulated from one another. Since the insulation provided by the enamel cannot be sufficiently relied upon, since it may have been altered by the operations of winding the turns and inserting the...