On Apr 10, 11:09 am, "bud--" wrote:
For good information on surges and surge protection try
http://www.mikeholt.com/files/PDF/Li...ublishedversio...
- the title is "How to protect your house and its contents from
lightning: IEEE guide for surge protection of equipment connected to
AC power and communication circuits" published by the IEEE in 2005
(the IEEE is the dominant organization of electrical and electronic
engineers in the US).

Go to that Bud citation Page 42 Figure 8. A plug-in protector
earths a surge - 8000 volts destructively - through the adjacent TV.
Why? Too far from earth ground and too close to transistors. IEEE
does not recommend what Bud posts. IEEE recommends in Standards.
IEEE Standards repeatedly define what is necessary for protection -
earth ground.

But Bud promotes for plug-in protectors. He follows me everywhere
as a troll promoting myths. Well look at Page 42 Figure 8.
Protectors do not stop or absorb what 4 kilometers of sky could not.
Protectors shunt (clamp, connect, bond) a surge to earth ground. In
Figure 8, what was the path to earth? Well protector was too far away
from the building earthing electrode. It had to make that 8000 volt
connection somewhere. So it earthed a surge, destructively, through
the TV.

Bud's citations show how plug-in protectors can work and can cause
damage. Bud own citation says an effective protector does this: page
6 (Adobe page 8) of
http://www.nist.gov/public_affairs/p.../surgesfnl.pdf
You cannot really suppress a surge altogether, nor
"arrest" it. What these protective devices do is
neither suppress nor arrest a surge, but simply
divert it to ground, where it can do no harm.

Did Bud forget to mention that earthing is the protection; that a
protector is only the connection to earthing? Well plug-in protectors
don't have that earthing. Bud even insists earthing is not
necessary. Funny. Even his own citations define earthing as
necessary - as does the IEEE where recommendations are published - in
IEEE Standards.

No earth ground means any effective protection - which explains why
even big buck protectors permitted TV failure - maybe exactly like on
Page 42 Figure 8. The plug-in protector (too close to transistors and
too far from earth ground) shunted 8000 volts destructively through
the TV.

Informed consumers install and earth one 'whole house' protector
where those wires enter the building. All utilities connect 'less
than 3 meters' to that common ground. How might a protector damage
that TV? See page 42 Figure 8 where a plug-in protector earths a
surge - 8000 volts destructively - through an adjacent TV. A
protector is only as effective as its earth ground. Plug-in
protectors hope you never learn about their missing earthing wire.
Profits are just too excessive to be honest.