westom wrote:
On Mar 9, 10:32 am, wrote:
You are oversimplifing. true Earth ground is a good idea in many
cases but you don't NEED TO HAVE a true Earth ground to provide surge
protection... there are other ways to do it...

So show me where that surge energy gets dissipated? A surge
protector does not magically stop or absorb surges. Show me where
energy get dissipated if not in earth? There is no way around
earthing for protection (as maybe ten professional citations state in
another post). But since you know a 100 years of industry
professionals are wrong, then tell us where that energy gets
dissipated? Show us how your protector design does it better.

You made the claim. Now let's see the science on how it is done.

For instance you could build a metal shed in the back yard completely
insulated from the earth (maybe on a 4 foot high pile of glass bottles).
The power service panel has a surge suppressor. Phone and cable entry
protectors have short wire to the power "ground". There would have to be
a suppressor from cable center conductor to "ground", or plug-in
suppressors. The shed "ground" is not earthed at all. Everything inside
is protected with no earthing at the shed. (The service panel suppressor
has lower surge currents than if it was earthed, thus lower energy
absorption.)

There are always multiple paths to earth, many provided by the
utilities. Poor w doesn't seem to be able to figure out multiple earth
paths.

The shed is not practical. But just like in the shed, much of the
protection in a house is from having all wires - power and phone and
cable - at the same potential. If a house has a higher resistance to
earth it means the interior wires may float to a higher voltage above
"absolute" earth potential. Even with a relatively good earth
connection, the interior wires can be thousands of volts above the earth
potential in parts of a concrete basement.


w forgot to include part of Mark’s post:
"You do know that they have lightning surge protection on electronics in
airplanes."
w has never explained how you can protect an airplane when there is no
earth ground - "no earth ground means no effective protection".

--
bud--