Definitions for "Drain Wire"
An uninsulated stranded or solid conductor which is located directly under a shield. Since it comes in contact with the shield throughout the entire length of the cable, it may be used to terminate the shield and eliminate a considerable amount of dispersion.
The wire in a cable or attached to an electronic circuit board that's connected to the shield and to ground to provide a path for undesired electrical signals to go to ground.
In a cable, the uninsulated wire laid over the component or components and used as a ground connection.