I currently have a 30Amp CB connected to 10 Gauge wire (Red, Black & White - no bare ground wire). I am about to connect a window AC unit that is compatible with a 20 Amp plug. My first question is this: can I replace the 30 Amp receptacle with a 20 Amp receptacle. Second question, since this system requires a ground would I need to connect the white wire to the ground bus in my panel instead of the Neutral bus?
thanks in advance for your assistance