Adapting dryer 3 prong receptacles done safely!

This is for when you need temporary 120v power at a dryer receptacle.  By following these instructions, you can build an adapter that is safe and NEC complaint using the NEC "No Equipment Ground" method.  Note that the GCFI or AFCI used should have a built-in current limit breaker on it for either 15 or 20 amps.