On Sun, 2015-02-08 at 15:32 -0500, Gene Heskett wrote: > On Sunday, February 08, 2015 02:53:28 PM Ralf Mardorf wrote: > > 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. > > Tisn't the building, its the idiot who did the wiring Ralf. A distinct > possibility he was color blind or 20 years short of a journeyman card. Or > both... > > I would, when something like that is found in the middle of a concert, stop > it, tell the promoter to refund everyines money, and to let you know when > the problem is fixed, you might save someones life, maybe your own > > ANY time I go into that sort of a situation where there are unknowns, I have > oner of those little $9.95 pocket pen sized beepers that you can stick its > insulated probe into a socket and tell in an instant if its wired per code. > If it beeps on what should be the static ground, or the neutral slot, the > show is off till its fixed. And it is not open for discussion. And I would > not be the least bit retgicent about calling any other groups you know about > and warning them. It WILL get fixed when his popular groups tell him not > until its been fixed. > > That gizmo is for sale, in several flavors and colors in any home > center/lumber yard/electrical wholesale, for various prices but are all > pretty much identical inside. The $9.95 veersion works as well as the > $19.95 version in my experience. And 6 or 7 years old, still running on the > original batteries. > > Sometimes you really do have to be an a$$hole about that sort of thing. > While I agree in principle, if you play in the New Orleans area you'll starve. I don't think there's a building in any of the old sections of NO that is wired to code. I've been zapped so many times that I'm beginning to glow in the dark ;-) > Cheers, Gene Heskett _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
