w_tom wrote:

Pete C. wrote:
You sure do like to babble, too bad 99.9% of what you say is either
total nonsense, pseudo-science, or hopelessly misapplied scientific
principles. Your links to claimed "vaporized" MOVs show no such thing
either.

You don't understand wire impedance. You insist that industry
professional papers are lies.

I understand wire impedance, you apparently do not and misapply the
concept. You haven't provided reference to any industry papers that
support your assertions.

Those burning power strip protectors due
to failing MOVs somehow are not fire threats?

Failing MOVs in an old poorly designed power strip / surge suppresser
combo that doesn't meet current standards could well be a fire threat,
however they have not been "vaporized" by a surge as you have claimed.

Meanwhile others who
want effective protection learn why properly earthed and properly sized
'whole house' protectors from responsible manufacturers such as Square
D, GE, Siemens, Polyphaser, Cuter-Hammer, Intermatic, and Leviton make
that short connection to earth; therefore provide effective
protection.

I have effective protection and it's multi level distributed protection
as good engineering practice dictates.

It starts with a Square D suppresser on the Square D QO series panel,
Leviton coax suppressers adjacent to the ground blocks at the CATV
demarc, the integral suppressers in the telco demarc and solid heavy
gauge ground leads to the adjacent 8' grounding electrode which is
solidly bonded to the secondary 8' electrode about 10' away.

It does not however end at this point in a "hope for the best" strategy,
the protection continues further with reasonable quality suppresser /
power strips (that have status indicators and thermal fuses), a large
quality UPS on the server rack, and additional suppressers on internal
phone / data / CATV lines.


Reasons why such protectors sold in Home Depot and Lowes are long;
assume the reader understands basic electrical concepts such as wire
impedance. To make such problems such as wire impedance irrelevant, we
install an effective protector with a 'less than 10 foot' connection to
earth. Apparently concepts such as wire impedance and MOVs vaporizing
is completely new information to Pete C. Others are encouraged to learn
why above manufacturers of 'whole house' protectors are considered so
responsible; provide effective protection. In the case of Polyphaser,
that protection is considered legendary.

Apparently folks like you latch onto technical terms like "wire
impedance" without bothering to get an understanding of what it really
means and how it is not the same as the wires DC resistance. You have
also not provided a single link to your claimed "vaporizing" MOVs.

The answer to the OP's original question "It is dangerous to have more
than one surge protectors in you home I
have 3 surge protectors running in my home." is clearly "no", it is not
dangerous.

And as myself and others have indicated a quality "whole house"
suppresser is very beneficial, but it does not obsolete secondary
suppressers further down the line, nor does it obsolete suppressers on
non power lines like CATV, phone and data.

Pete C.