After using my new oven three or four times it began tripping the breaker (15 amp).  I moved it to another circuit and made sure nothing else drawing power but the unit still tripped that breaker.  I warrantied the oven and got a new one and the exact same thing happened again.  It worked maybe four or five times tops and now it will consistently trip the breaker on any circuit I try.  My home was built in 2017 and maybe the electrical codes are a stricter now?  This is really frustrating because I love the unit when it did work for me, I made great brussel sprouts with the air fry setting.  Unfortunately I have to give this one star as I cannot use it, even after being replaced.  I wish ninja would offer a lower wattage version of this oven, no more than 1200 watts, to correct this problem.