[LAU] ground loop hell

[Hermann Meyer]

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.
-- 




Ralf Mardorf <ralf.mardorf at alice-dsl.net> schrieb:

On Sun, 8 Feb 2015 09:06:40 -0800 (PST), Len Ovens wrote:
>It appears we have power coming from two power entrances with two
>different earth grounds to the panels.

I experienced potential difference for the ground in old buildings
between two main sockets, less than 3 meters difference between those
sockets, both fed by the same power, coming from the same fuse and
connected to the same concrete-footing ground electrode.

Even if the power should come from two different sources, one building
should have one concrete-footing ground electrode for ground, so in
theory there shouldn't be a potential difference.

Buildings sometimes don't care about school books.
_____________________________________________

Linux-audio-user mailing list
Linux-audio-user at lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxaudio.org/pipermail/linux-audio-user/attachments/20150208/6c7b6b53/attachment.html>