RE: [OT] USB, electronics and ground

["Paul Gale" <groups@xxxxxxxxxxxxxxxx>]

Is there a way around this - to get everything at the same potential?

Paul.



> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> Lehane Kellett
> Sent: 06 September 2006 12:34
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] [OT] USB, electronics and ground
>
> Often devices that are supplied by wall warts or bricks are not at
earth
> potential and can be floating several volts above ground.
>
> Lehane
>
>
> Tim Hawes wrote:
> > Just thinking aloud...
> > Does your UPS have a plain filtered outlet i.e. one that is not
battery-
> backed?
> > Maybe if you connect the other devices to that it would give them
all
> > the same earth potential?
> >
> > HTH,
> >
> > Tim.
> >
> > On 9/6/06, Paul Gale <groups@xxxxxxx> wrote:
> >
> >> I seem to have a problem with ground or earthing here. When I
plug in
> USB devices to my main PC, I get small sparks between the shield and
the
> PC case. This sometimes causes the PC to hang (not surprisingly!). I
guess
> I have different ground signals between various kit????
> >>
> >> The PC is powered from an APC smart UPS and the other USB kit
is on a
> mixture of standard power strips and surge protected strips.
> >>
> >> Any ideas?
> >>
> >> Thanks,
> >>
> >> Paul.
> >>
> >
> >
> >
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