Hey y'all. Been gone a long time. Hope you can help me:
A residential client wants an isolated ground for optimal performance in his audio/visual entertainment system. I plan to run 12-3 from isolated-ground type recept, marking the red wire as green ("clean" ground) and attaching it to isolated groundscrew on device, then running the 12-3 into branch circuit panel, but with the (red) isolated ground wire continuing on to the service entrance for bonding (i.e., no bonding at branch circiut panel). My question is: what do I do with the other ground ("dirty", uninsulated copper)? As this is a residential job, all boxes are plastic and there is no conduit. At the panel I will of course terminate this bare copper on the equipment grounding bar; but what do I do at the recept? Since on an isolated-ground recept the yoke is isolated from the device's grounging screw, can I (now this is gonna sound like a real hack, but...)..can I wrap the bare copper around the screw that attaches the yoke to the plastic box? Is there a better (i.e., more proper) way?
