We will just have to agree to disagree there. If a breaker is rated at 20 amps load at 110v it will certainly hold 1920. I also speak from experience here. Long term loads of 1800-1900 months on end. No issues. But yes the breaker will get warm.
Strato
Good luck with that. I hope your breakers work correctly. Some of them don't. I replaced my entire panel because the manufacturer, Federal Electric, produced breakers that didn't shut down reliably in the case of overloads and caused a number of house fires.
Another factor to consider if your power is subject to brown outs... Your miner power supply will attempt to maintain a constant voltage to the miner and hence constant power output even if the line voltage drops. This means the current draw will increase. So if you have reliable operation during periods when your supply voltage is high you may have difficulties if your voltage drops. Should this happen, you can hope that your problems are tripping breakers and not breakers that you wish had tripped but didn't.