I need some help with the wiring on my existing clothes dryer receptacle. The receptacle is a three prong type with 6ga aluminum type SE cable feeding it. The receptacle is currently nailed directly to my poured concrete basement wall. I want to finish the laundry area with 2x4 studs and drywall and will need to remount the receptacle to the new wall.
There is a bare copper wire that runs from the center post of the receptacle to one of the mounting nails that holds the receptacle to the cement wall. What is the purpose of the copper wire that is attached to the nail? Is this some type of grounding wire? Will I disrupt the ground path if I mount the receptacle to 2x4/drywall instead of directly to the concrete?