>There is nothing stopping me from getting an adapter to plug a space heater with a cheap 16awg cord with an adapter into a 30a outlet That would be against co

>There is nothing stopping me from getting an adapter to plug a space heater with a cheap 16awg cord with an adapter into a 30a outlet That would be against code. There's nothing stopping you from running bare wire through your walls. There's nothing stopping you from not bothering to ground any outlets. There's nothing stopping you from using 14AWG romex on a 50 amp breaker. Etc., Etc. All of that is against code, and I've personally seen all of that in the wild at people's homes, offices, etc. If you wanted to do things the #rightway, you'd most likely need a subpanel for the UPS to feed.