This is not the "normal" problem of a bootlegged ground.
We have a standard old outlet box with some cloth wires, but also some bare (I think) aluminium wire hooked up to the neutral.
See photos below of the outlet (one screw removed to get a closer look at the weird ground wire) and the box with the outlet removed. Neutral is the side closest to the camera.
- Does anyone have an explanation for this?
- The bare metal wire looks rather thin. I'm not sure if it would safely carry 15A without heating up. Is it dangerous?
This aluminium wire vanishes through the back of the (metal) outlet box so I have no idea where it goes. All the wires in this box have less than 1cm of slack; it's a very weird install.
The house is ~1930s but this outlet is close to a 1990 extension and the wall may have been opened to run wires for that extension (ie. some opportunity to kludge a ground into a pre-60's system)
I'm leaning towards replacing with a gcfi outlet and leaving that weird metal tape wire alone.
PS. re: electrical codes this is NE USA.