Re: Ground Loop challenges

["John R. Sowden" <jsowden@xxxxxxxxxxxxxxxxxx>]

On 01/20/2018 01:14 PM, ABLE1 wrote:
> Hey Guys!!
>
> I have a camera install that is plagued with Ground Loop issues.
>
> I have been installing individual BNC Ground Loop Insulators on
> individual cameras that are the worst which cleans up the video for that
> camera.
>
> However, over time another camera gets bad, and then another, etc.
>
> As I understand the problem is due to an imbalance in voltage at 60
> cycles or ground reference between phases from the power company. And
> that the video is very sensitive to the imbalance and causes the video
> bars, bla bla bla.
>
> My questions are as follows.
>
> Is there a something device thingie that can be installed at the breaker
> panel across the phases that can blend or sync the cycles, etc.??
>
> Is there a something device thingie that has more than one individual
> port that can be mounted at the head end (like a 8 or 16 port) that can
> isolate the ground loop with out using all the dongles??
>
> Thanks for any insight!!
>
> Les
  General rule of thumb.  Only one power source.  Only one ground point.
A IR drop is created between 2 grounds.  If between buildings, where
power could well be out of phase with the power a of another building.
The safe bet is either RF or fiber.

john