I've owned Class-A amps most of my life, kinda my jam. I currently use a pair of Pass XA160.5, which I've had for quite awhile. Probably have owned at least a dozen different Class-A amps, along with others.
Never a problem with any of the Class-A amps and I have only ever had a 15 amp circuit.
The only amp I can remember tripping a breaker was my Belles 350 Reference, (pre soft-start circuit). That damn thing would trip the breaker every time. Had to leave the power switch on, then reset the breaker to turn it on.