I’m replacing the unshielded power cord on a microphone
preamp. Besides having an insulated ground wire there is
a raw wire lead. That raw lead is attached to the plug
ground, of course, but in addition to the foil wire wrap and
in turn to the stranded wire shielding. What is the purpose
of the raw wire lead and what should be done with it? I was
under the impression that for maximum RF/EMF rejection
the coax shield/foil only drained into the common ground of
the plug, not to the equipment itself.