The US often has some appliances wired for 240V; I assume stovetops are, but IDK. Large appliances have their own breakers. I was told that if we wanted to install a built-in microwave, itβd require a new, dedicated wire and breaker.
A lot of places have code requirements that the microwave have its own breaker even though theyβre almost all 120v; itβs because they use almost all the amps on the 120v circuit so you tend to trip the breaker if you have anything else big going on, like an electric kettle or a vacuum cleaner.