I have been trying to install a new outlet in a room in my 1950s house, but I am really confused. When I opened it up, there were two black wires in under one screw and one under another. Ditto for the white wires. (No grounds anywhere in the house). I knew that was wrong
I pulled it apart and have been trying to sort it out and my head is ready to explode. The first pair (black #1 and white #2) are on one breaker. The second pair (black #3 and white # 4) are on another breakers. And, the third pair (black #5 and white #5) are on yet a third breaker.
To make matters worse two of the black wires (#1 and #3) and two of the white wires (#4 and #6) are hot.
When testing I get 120 between #2 (which appears to be a true neutral) and #1, #3, #4, and #6.
I get 240 between #6 (which should be neutral, by color) and #1, #3, and #4
All other combinations are 0.
There is a light in the room (on a switch) that was working separately from the outlet, but is now out. The outlet has always stayed on, independent of the switch.
I could not come up with any safe way to put it back together.