[Elecraft] Isolated ground

[Don Wilhelm]

John,

Think single point ground (the one at the breaker box end) - it minimizes
circulating ground currents.  Great for audio (keeps hum off the equipment
enclosures, etc.), but of no value for RF.

BTW - are you saying you are working on a bench with a conducting metal top?
If so, that is a hazard in itself for any electrical work.  Consider what
can happen if you accidently contact a high voltage while touching the desk.
That is why metallic objects (and anti-static devices) are normally grounded
through a 1 meg resistor.

73,
Don W3FPR

> -----Original Message-----
>
> In my house I set up my ham shack /workbench in the garage.  I
> ran 6/3 awg to a subpanel.  From their I have everything in the
> garage ie washer dryer water heater overhead outlets motion
> lights flourescant strip lights 240v heater wired with thhn wire
> ran in 1/2 EMT.  I even made sure that the track the garage doors
> roll up on was bonded to the EMT.  Basically anywhere you put a
> meter in their its going to read .17 ohms even the metal
> steelcase desk is bonded. Along with the filing cabinet.  Now I
> got those fancy red isolated ground receptacles with the green
> delta triangle.  The ground screw is not connected to the
> mounting strap on the outlet so your ground wire is isolated
> except when you connect the ground wire to the ground bar in the
> subpanel which is connected through the EMT back to the box
> holding the outlet. Maybe I'm missing the point but how is
> different from using a regular outlet.  And yes I have the
> neutral bus seperate from the ground bar per NEC.  Their probably
> overkill but since I have them might as well use them.
>
> John wt5y
> Sent via BlackBerry from T-Mobile
>
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