I've found that while I have 3-prong outlets, I don't think there are ground wires. I also have a situation where I have a dryer with 3 prongs instead of 4. I would like to add a ground wire & am wondering if I can do this without having to run all new wire. So, a few questions: 1. Does a ground wire have to be in a casing/shield or coating? 2. Instead of running all new wiring, can I run a separate ground wire from the breaker the outlet is attached & back to the outlet? 3. Or can a ground wire be run directly to a grounding rod instead of to the breaker? 4. If it needs to be sheathed or coated, can automotive electrical coating be used? Or do the sell just single grounding wires in various gauges? 5. Does the ground wire have to be the same gauge as the rest of the wire (say I have an 8 gauge for a dryer, would I need an 8 gauge ground)? If the dryer's plug could normally work with 10 gauge could I use that instead?