8 Feb
2015
8 Feb
'15
9:18 p.m.
On Sun, 8 Feb 2015 20:53:28 +0100, Ralf Mardorf wrote:
On Sun, 8 Feb 2015 09:06:40 -0800 (PST), Len Ovens
wrote:
IOW care about creeping current from washing machines and dishwashers
and similar issues. My dishwasher does suffer from creeping current.
You can measure it, but you don't get an electric shock. However,
things similar to that and other strange seed happens in reality.
Ground between two mains sockets very often is not neutral, for what
reason ever. We are living in a real world, not in school.
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.