w_tom wrote:
On Jul 7, 9:27 am, Caesar Romano wrote:
Does anyone know ifsurgesuppresser protection can be increased by
"chaining" two or more together?
..
The best information on surges and surge protection I have seen is at:
http://www.mikeholt.com/files/PDF/LightningGuide_FINALpublishedversion_May051.pdf
- "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).
And also:
http://www.nist.gov/public_affairs/p.../surgesfnl.pdf
- "NIST recommended practice guide: Surges Happen!: how to protect the
appliances in your home" published by the US National Institute of
Standards and Technology in 2001
The IEEE guide is aimed at those with some technical background. The
NIST guide is aimed at the unwashed masses.
..
Protectors do not work by absorbing or blocking surge energy. Will
those silly little parts in a power strip stop what three miles of sky
could not? That is also what they imply.
..
Only w_ talks about absorbing, blocking and stopping.
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But most important, the effective protector connects
surge energy very short into earth.
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Apparently airplanes can’t have "effective protectors".
w_ has a religious belief (immune from challenge) that surge protection
must use earthing. Thus in his view plug-in suppressors (which are not
well earthed) can not possibly work. The IEEE guide explains plug-in
suppressors work by CLAMPING (limiting) the voltage on all wires (signal
and power) to the common ground at the suppressor. Plug-in suppressors
do not work primarily by earthing (or stopping or blocking or
absorbing). The guide explains earthing occurs elsewhere. (Read the
guide starting pdf page 40).
Being evangelical in his belief in earthing, w_ trolls google-groups
for "surge" to paste in his religious tract to convert the heathens.
This is at least the 5th time he has been to this newsgroup in the last
2 months.
..
To install
an effective protector, see products from far more responsible
companies such as Square D, GE, Siemens, Intermatic, Cutler Hammer,
Intermatic, Keison, Leviton, etc.
..
As dpb has pointed out several times, all of these "responsible
companies" except SquareD make plug-in suppressors.
SquareD, for its "best" service panel suppressor, says "electronic
equipment may need additional protection by installing plug-in
[suppressors] at the point of use."
..
One who promotes for plug-in protectors (and will not admit it) will
..
Poor w_ has to try to discredit anyone who exposes his drivel. To quote
w_ "It is an old political trick. When facts cannot be challenged
technically, then attack the messenger." My only association with surge
protectors is I have some.
..
post citations that show what protectors must do:
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What does the NIST guide really say about plug-in suppressors?
They are "the easiest solution".
..
You somehow assumed protectors are blocking, stopping, or energy
absorbing devices.
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If w_ was not impaired by religious blinders he could read in the IEEE
guide that plug-in suppressors do not work by blocking, stopping or
absorbing.
..
One earthed ‘whole house’ protector does more protection than 100
chained plug-in protectors.
..
Service panel suppressors are a good idea.
What does the NIST guide say?
"Q - Will a surge protector installed at the service entrance be
sufficient for the whole house?
A - There are two answers to than question: Yes for one-link appliances
[electronic equipment], No for two-link appliances [equipment connected
to power AND phone or cable or....]. Since most homes today have some
kind of two-link appliances, the prudent answer to the question would be
NO - but that does not mean that a surge protector installed at the
service entrance is useless."
Never seen - a link to a source that agrees with w_ that plug-in
suppressors are NOT effective.
Never answered - embarrassing questions:
- Why do the only 2 examples of protection in the IEEE guide use plug-in
suppressors?
- Why does the NIST guide says plug-in suppressors are "the easiest
solution"?
– Why does SquareD say "electronic equipment may need additional
protection by installing plug-in [suppressors] at the point of use."
For real science read the IEEE and NIST guides. Both say plug-in
suppressors are effective.
--
bud--