I’m confused, how could both sides be running off of the same leg? I haven’t had a chance to look at panel since yesterday, working a 14hour shift. I know the panel is federal pioneer with stab lok breakers, with a square D sub panel. I know the FP Stab Lok double poles are pretty narrow but they say they are 240. I purchased the house off of family last year. I know my brother in law built the house and the electrical is scared and the rats nest of wires in the panel is rather scary. I haven’t had a chance pull off the cover for the main, but there’s no way it can have just one hot and a neutral? Single phase should always have two lines and a neutral right?