Okay, this really isn't a shop related matter, but wiring is often a subject here.

The existing wiring in my house was installed before the era of grounding. I upgraded the service several years ago and installed a ground to the 200 amp service panel. All new new circuits are of course grounded.

Since the existing outlets have no ground, I was thinking about dropping a twelve gauge copper wire down from each outlet, through the wall cavity, into the dirt floor basement/crawlspace. There, I would attach this flying lead to a ten gauge cooper bus that is ultimately attached to a grounding rod in the basement.

Any idea if this is kosher? I know code varies, but in general is there something seriously wrong with this arrangement?