In (recent) US construction most branches are 20A @ 120V (formerly 110 and 115 and sometimes closer to 125). What changes is the number of sockets on a 20A branch. Like, all the sockets in the bedroom(s) can be on one branch. But the kitchen will probably have at least 2, one for say, the lights and the fridge, one for the counter socket where the microwave and toaster goes. The laundry has its own.
Technically my laundry socket is overloaded with washer and dryer running at the same time @ 22.5A. But the washer plate says 9.6A and I'm certain that is only peak like when starting spin. The breaker never trips.
Also, breakers can go bad and trip for no reason. Even fuses can, but the replacement shouldn't, not right away. Fatigue has to build up.