From National Wind Watch:

Scott Srnka speaking about stray voltage trouble on his farm:

“This is a five hundred ohms resistor here, this wire is hooked to my stall, this white wire is a remote ground rod way across way, way away from the buildings. So I can go shut the power off across the road and this will still read the same. So it’s coming out of the earth. And I’m four wired. When I shut my power off all four wires are disconnected. So my ground and neutral don’t even come to the farm either.

This is coming out of the earth getting on my stalls, and this is where the cows are living.”