On Friday, May 09, 2014 07:14:53 PM Will Godfrey wrote: > On Fri, 09 May 2014 13:01:57 -0500 > > Reuben Martin <reuben.m@xxxxxxxxx> wrote: > > On Friday, May 09, 2014 06:05:47 AM Ralf Mardorf wrote: > > > On Thu, 2014-05-08 at 18:02 -0500, Reuben Martin wrote: > > > > On Friday, May 09, 2014 12:44:00 AM Jörn Nettingsmeier wrote: > > > > > On 05/08/2014 09:30 PM, Jonathan E Brickman wrote: > > > > > > AC power ground lifts sometimes have helped, sometimes > > > > > > > > > > There is no such thing as an AC power ground lift. The correct term, > > > > > and > > > > > please don't take it personally, is _criminal_ _incompetence_. > > > > > > > > It sometimes makes sense to lift the AC ground if you are pulling > > > > power > > > > from more than one source. (To prevent ground loops) As long > > > > everything > > > > is grounded to the remaining source correctly. > > > > > > Potential difference by getting the power from different main jacks or > > > experiencing ground loops, because you don't care about a correct > > > grounding are no excuse to give a life-endangering "hint". > > > > I'm not suggesting to cut the ground pin off. When you use an AC ground > > lift they come with a metal ring to re-direct the ground connection so > > that equipment using different power sources can share a common ground. > Link to highly dangerous item not repeated! > > How on earth is this legal? Do you *really* think most people will be savvy > enough to know that you're supposed to connect the tab to a proper earth? > Would they even know what a proper earth was? > > There is absolutely no way of ensuring the earth is ever connected at all! A > properly designed 3pin connector ensures the earth is always connected > first, and disconnected last. It's the *only* safe way to work. Perhaps I assume too much thinking the proper handling of power and wiring is common knowledge. I deal with power issues on such a regular bases in my job, that I sometimes forget that all too often people are messing with power who have a very poor understanding of what they are doing. I work in large event audio-video-lighting production, so it's very common for me to be encounter power hazards that would probably give most people on this list the creeps. -Reuben _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
