Backfeed voltages on dead legs?

I had some tenants move out and 2 months after the fact I'm tired of running extension cords to the unit (which I've been told is illegal, BTW). Anyway, the electric company came out today to hook me up and refused to because of a 26.7VAC and a 22.3VAC backfeed voltage across both legs. It's an Edison split transformer and the main legs were completely disconnected. How could there possibly be a potential difference? Do I have magic wires or something? THESE MAINS WERE COMPLETELY OUT OF THE BOX. I can't emphasize that enough. They share a common run with another unit's conduit and the ground hasn't been inspected. What could be causing this spurient voltage? Give me some ideas before I give up and call an electrician. Bad meter socket? Failed ground (center tap should take care of that)? Induction? There really is nothing more I can think of, the damn mains were in my hand, dead, and still measuring voltage at the socket but not at the end of my mains. Has to be in the socket, right?

William B2012-07-11T05:42:19Z

Favorite Answer

any time you have a back feed on a neutral call an electrician,
it is potentially dangerous
We had one at a school i worked at the Boss said its ok
we had 35 volts on a neutral back feed
well 2 weeks later and it blew the floor out ended up with over 600 volts back feed even electricians never figured it out,

Polar Bear2012-07-11T06:01:29Z

The devil's in the details,.... you said there is a shared conduit. Get into wherever the floating ground is connected to the conduit from the other unit. Disconnect that connection and sink a ground rod, and isolate the other unit neutral. That should kill the back feed.

Anonymous2012-07-11T05:09:35Z

call an electrician

Anonymous2012-07-11T05:04:33Z

No clue, but I totally love your avatar name.