Im afraid I dont know the numbers. But my setup is a normal outdoor (Im assuming 120 volt) outlet from a house with the thickest gauge extension cord they had at local harware store and an adapter to my camper. I can run many things at the same time, computer, tv, instant pot, fan, even a/c and I never had a problem but the space heater on high was a bust. And I didn't even try to run it on low, I just didn't want something that could provoke an extra headache for the property owner with the circuit tripping. Truth is I am fine paying the propane price for heating but if I could supplement that with an efficient space heater I would be happier. I assumed there would be someone on here with such experience. I'm not looking to find the exact wattage or amps I can run within a certain breaker, a small, simple space heater that doesnt max out the wattage or amperage that would trip a breaker is what I'm looking for. Hopefully something efficiently designed and worth buying in my situation.