Re: Should I earth my supply ground?

Stanislaw Flatto wrote:

siliconmike wrote:

Or in general, why are grounds earthed?

Mike


Theory: "Ground" is an infinite capacitor without any resistance or
inductance and can accept currents of any size and frequency without
building a voltage difference.
So supposedly it is a reference point and any grounded equipment,
working OR faulty does NOT built voltages that can be fatal to people.
(Have you ever got a static shock from body of car, then you know what I
mean)
In practice every part of equipment is connected (sometimes) to ground
with a wire and the electrical properties of the connection will
determine the quality of "grounding".

In practice, most grounding electrodes are pretty crappy. Most have
pretty high impedances relative to the fault currents they will carry in
the event of a short to true ground.

What is very important is the bonding between the premises ground bus
and other conductive parts of the structure (like water pipes). I don't
care so much if the potential of everything in my house jumps 50 or 100
volts relative to some ideal ground. I just want all the objects in my
house to remain at the same potential WRT each other.

--
Paul Hovnanian mailto:Paul@xxxxxxxxxxxxx
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If your only tool is a hammer then every problem looks like a thumb.
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