Quote:
Originally Posted by nota
really do NOT UNDERSTAND this as I thought A/C went both ways 
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The current goes both ways but the white wire is at ground potential. The black wire goes from -169 volts to + 169 volts.
If you switch the white wire side (in the appliance) you could get some capacitive coupling to the chassis which is what I assume is happening since you get a shock but aren't dead yet.
Is the outlet in the wall installed correctly?