[LAU] ground loop hell

[Ralf Mardorf]

On Sun, 08 Feb 2015 21:14:12 +0100, Hermann Meyer wrote:
>Old buildings didn't use grounds, they just have 2 cords and use the
>second as ground and backline. In German this is called Nullung.
>Potential issues are clear with this technique.

Actually I'm living in an "Altbau" with retrofitted concrete-footing
ground electrode. Potential issues could be caused by tons or grotesque
reasons. Reality has absolutely nothing to do with school books.