“Non-Continuous” Loads: With a typical electric stove, there might be one burner on, or two, maybe even three, at a time. You might turn on the oven, you might not. You might have the oven AND a burner on. Or not. And even with the oven, its heating elements turn on and off, according to the temperature settings.
The amount of electricity being used fluctuates.
The National Electrical Code (NEC) classifies this as a non-continuous load. Although the stove may be on a 50-amp circuit, it’s extremely rare that it gets close to drawing that full amount, and even then it’s intermittent.
“Continuous” Loads: Electric cars are different. When you plug a car into a charger that’s on, say, a 50-amp circuit, it starts charging at a solid 42-amp rate, typically, and stays there — for hours.
The amount of electricity being used is constant.
The NEC calls this a continuous load, and the wiring requirements are very different. In addition, a 40-amp continuous load can play havoc with your home’s electrical system if, for example, you have only a 100-amp service to begin with. That’s small by today’s standards, but 100 amps was the standard not that long ago.