As you can see from the graph, a 6 AWG is the safe choice if you have a 220v 50 amp that you need to power. A 12-gauge is the right wire size for your 220v 20 amp needs. Whether you’re finding out the option for your 1000 or 2000-watt needs, this is the chart the pros ...
this should be enough power for you. If not, remember that you will have to unplug one or another to have enough wattage available. But here’s some wise words, no one ever said, “I wish I had LESS power.”