I have a junction box that seems to be wired as shown in the attached image, with the hot and neutral coming from two different wires out of the panel, and the other two wires spliced together inside the panel. If this is correct (I haven't removed the panel cover to look inside), why would it be done this way? Couldn't the splice be made inside the junction box instead? With only one wire to the panel?
I should note, there is more on this circuit than what is shown, but what is shown is complete (no other wires in this junction box, and the wires going to the panel run direct, not through any other boxes).
LEGEND Marker: hot (black) Pencil: neutral (white) Highlighted: switched hot