When we had the trailer and passageway torn down, they cut the wires that went to a flood light at the front of the house. I’m going to put a new two-socket floodlight over the new, now-exterior, door. The first thing I noticed is that there are two holes about four inches apart coming out of the wall. The next thing I noticed is that each hole has a black and a white wire coming out of it. The third thing is that the white wire from one pair is connected to the black wire of the other pair. The other black and white wires continue toward where the floodlight was. In other words: black[sup]1[/sup] to free end, black[sup]2[/sup] to white[sup]2[/sup], white[sup]1[/sup] to free end.
Why would whoever did this do it that way? Why not just have one pair of wires?