Re: Surge protectors to use with home electronics when grounding is not available?
- From: w_tom <w_tom1@xxxxxxx>
- Date: Tue, 1 Jul 2008 13:45:35 -0700 (PDT)
On Jul 1, 12:57 pm, bud-- <remove.budn...@xxxxxxx> wrote:
No surge protection stops or absorbs the common mode
surge - surge that typically causes appliance damage.
Never explained - how does a common mode surge on incoming power lines
get past the N-G bond required in all US services.
And neither service panel or plug-in suppressors protect by "stopping"
or "absorbing".
...
The IEEE guide explains plug-in suppressors work primarily by CLAMPING
the voltage on all wires to the common ground at the suppressor. The
guide explains they do not work primarily by earthing.
Bud routinely repeats same allegations hoping that a lurker will
forget those answers were provided repeatedly. Yes, an AC electric
neutral wire is connected to breaker box earthing. A surge does not
enter on neutral wire. Both hot wires connect surges directly to
household appliances without any connection to earth. How are both
hot wires earthed and still provide electricity to appliances? The
100 year old solution: one 'whole house' protector connects each hot
wire to earth ground.
A protector acts like a switch: closes (connects) each hot wire to
earth ground only during surges. Now surge energy on all three AC
electric wires is earthed before entering a building. Earth is where
surge energy must be harmlessly dissipated. Then protection inside
all appliances is not overwhelmed. A protector within feet of earth
ground AND well separated from appliances provides best protection -
and for less money.
The IEEE guide says a plug-in protector will clamp to itself – also
called clamping to nothing. Surge energy remains; still seeking a
path to earth. IEEE guide also says plug-in protectors are an easiest
solution. What did Bud forget to mention? The easy solution can
create appliance damage. Page 42 Figure 8. IEEE guide shows why the
easiest solution may contribute to appliance damage. When an 'easy'
protector is too far from earth ground and too close to appliances,
then an 8000 volt surge destroyed an adjacent TV - Page 42 Figure 8.
That energy must be earthed OR that energy will find destructive paths
to earth maybe via household appliances.
If you learn this, then profits diminish.
Both Bud citations, and Sun Microsystems, many IEEE Standards (IEEE
Red Book, Green Book, Emerald Book), US Air Force, QST (the ARRL), Dr
Kenneth Schneider, Electrical Engineering Times, Schmidt Consulting,
Polyphaser's highly regarded application notes, a station engineer
from WXIA-TV, Dr Martzloff in his IEEE paper on the Upside-Down
house ... in every case, effective protectors have a short and
dedicated connection to single point earth ground. One 'whole house'
protector is not 100% protection. From the IEEE Standard:
Even this means is not positive, providing only 99.5-99.9%
protection. ... Still, a 99.5% protection level will reduce
the incidence of direct strokes from one stroke per 30
years ... to one stroke per 6000 years.
Why would anyone waste $25 or $150 per appliance on protectors that
may contribute to adjacent appliance damage? Even with plug-in
protectors, a 'whole house' protector is still necessary. Bud is
quick to define an "easiest solution" that provide profits. Bud
forgets what the IEEE demonstrates – the “easiest solution” can also
make appliance damage possible – Page 42 Figure 8.
Bud still does not provide plug-in protector numeric specs that
claim protection. An "easiest solution" does not protect from surges
that typically damage appliances. Did Bud again forget to post those
manufacturer numeric specs? Bud again refuses to post what does not
exist. Plug-in protectors – the “easiest solution” - do not claim
such protection in numeric specs. Did Bud also forget to mention that
part?
Bud even forgot what earths all three AC wires so that surges need
not damage any appliance. One properly earthed 'whole house'
protector. Bud does conveniently forget things that don't promote
plug-in protectors. Bud also forgets that a protector is only as
effective as its earth ground - where surge energy must be diverted.
.
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