Attached Garage, No sub panel, seperate grounding rod
I am replacing the cable run that feeds my garage outlets. It is fed from the basement ceiling through the joist into the garage. In the house the old wiring connected to a circuit in the basement room closest to the garage. The cable was a 12/2 no ground. In the garage it connects in a splice box where the circuit continues to the garage outlets. That splice box has a seperate copper wire running down to garage wall, passes to the exterior of the garage and attaches to a grounding rod.
Hope that makes sense so far. Now my question:
Should I just run new 12/2 no ground cable?
Run 12/2 w/ ground and tie into the rest of the circuit at the splice box as it was before except in addition to the previous connections, also connect the ground from the 12/2 cable to the existing garage grounding system.
Run 12/2 w/ ground and tie in at the splice box but disconnect the seperate grounding rod from the circuit completely?
something completely different.