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I’m looking at electric panels in some newer residences and seeing something confusing: Circuit breakers that are adjacent to each other, but that cover unrelated circuits, are ganged, as shown below. By “unrelated circuits” I mean circuits that have no reason to trip or switch together. For example, “Master Bed Lights” and “Living Room Outlets” are adjacent and ganged. So are “Bath GFCIs” and “Office Outlets.” (And then there are a few adjacent breakers that are not ganged.)

Is there some code or other reason for ganging unrelated breakers like this?