I had a question regarding the neutral wire on the secondary side of a transformer. When connecting H2 and H3 in series, H1 and H4 can be fed 480V to step it down to 120V. On the secondary side, I understand having to connect X4 and X2 together, and X3 and X1 together, putting them in parallel to get 120V. My question is, does X4/X2 become a neutral wire or X3/X1? I've seen a project where X3/X1 was used as neutral in a schematic, but I can't figure out why. Did they ground it? Did they just choose that as neutral while deciding X4/X2 would be their hot wire? Or is it because X4/X2 leads X3/X1? Please let me know and thank you in advance for the help