Hey all, I got a new UPS today, and when I plugged it in, the site wiring fault light was on. Naturally, I went to check what was going on. Not having one of those little testers, I just used my multimeter and measured voltages at the outlet. It seemed like the ground wasn't connected because I got 0 volts from hot to ground, and 0 from neutral to ground. Turns out that was just that one outlet, because when I checked another outlet on the same circuit, I got 120 volts from 'neutral' to ground. Hmm. I pulled out the fuse (yes, I have a real fusebox), and pulled the faceplate off the outlet, after checking a half dozen times to make sure it was off (it doesn't take getting zapped too many times before you start being really careful...).
What I saw was not pretty. The wiring was two conductors wrapped in awful cloth that disintegrated when I touched it. There certainly was no ground wire, so they must be relying on the 'armor' on the cable. Now, looking at the fuse box, and another outlet, I'm sure that they have the color coding right, black is indeed hot. So, I fixed the outlets in my computer room, and put the fuse back in. I have no idea what happened, because measuring hot to ground gives me 37V and neutral to ground is 26? I looked at some other outlets in the apartment, and it seems that every. single. one. is wrong. I figured there must be some problem because only these two outlets are 'correct', so I switched them back. But it's still doing it.
I have no idea what the hell I've done. Anyone have any ideas?