I live in North American and had an electrician come out and install a 240v 20 amp two-pole circuit breaker to a NEMA 6-20 outlet.  I have a 6-20p to C13 cord to connect a Bitmain AWP++ PSU directly to the socket (no power distribution unit).  Am I going to fry my miner if I do so?

Ahh, makes sense. Thank you os2sam.

I have an Antminer L3+ with the latest firmware.  And I notice once or twice a day even after a miner reboot that my pool is reporting up to 10% less in MH/s rate than my miner is reporting.  Most the time they align, but occasionally I see this once or twice a day.  I thought maybe Bitmain is syphoning, or maybe my mining pool is syphoning.  Anyone else see this or hear of issues like this?