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Posted by on June 14, 2006, 3:50 pm
w_tom wrote:
> For "have a pretty good idea of how it happened", than what also
> protected those other undamaged electronic appliances? What protected
> those kitchen and bathroom GFCIs? What protected the smoke detector?
> What protected the dishwasher? How did those appliances without
> plug-in protectors not suffer damage? Invisible surge protectors?
Last time I checked, none of the devices on your list above gets
connected to the telephone line. The PC, FAX, and Tivo were connected
to the telephone line. The PC and FAX were connected through a strip
type surge protector and survived a surge caused by a thunderstorm.
The Tivo was not connected The Tivo had the modem section blown out,
while the rest of the Tivo was still functional.
Based on that, it seems very reasonable to conclude that the surge
likely came in on the phone line and that the surge protector for the
PC and Fax very likely saved them. However I know you will argue
otherwise.
>
> You are using same logic process that somehow proved childhood
> leukemia from AC electric wires. Selectively ignoring other data such
> as that undamaged microwave oven and furnace controls.
Again, the furnace and microwave were not connected to the phone line.
Meanwhile,
> demonstrated was how a plug-in protector simply provided lightning with
> a destructive path through a network of computers. Shunt mode
> protectors require earthing. No earth ground asks how does that surge
> get shunted into earth? Via adjacent appliance. Or maybe another
> appliance acts as a surge protector - shunts the surge to earth
> destructively. IOW you only assume that protection works and
> completely ignore that air conditioner control electronics that was not
> damaged.
Hmmm, is your air conditioner connected to the phone line?
>
> A method of making a kludge 'whole house' protector for apartment
> dwellers was defined. Take a plug-in protector of maximum joules. Cut
> its six foot power cord down to near zero feet. Plug it into the wall
> receptacle that is closest to earth ground (and breaker box). It
> becomes a 'poor mans' whole house protector. Best you can do if an
> apartment owner will not install your 'whole house' protector.
>
> But again, what makes that kludge solution into better protection?
> Shorter power cord. Closer to earth ground. Increased distance from
> appliance to be protected. What does a shunt mode protector do? It
> shunts. Either it shunts a transient into earth (safely), or it shunts
> a transient to earth, destructively, via the adjacent appliance. Or it
> does nothing because the Tivo did that shunting.
>
> Meanwhile: "getting through the AC surge protector" ? Do you think
> some magical blocking device exists inside a shunt mode protector?
> Incoming protector wire and outgoing receptacles are direct electrical
> connections. Nothing 'blocks' inside that protector. Wall receptacle
> connects directly to appliance plugged into that protector - a direct
> wire connection. In fact, if a protector provides protection to its
> receptacles, then protector also provides protection to anything
> plugged into other side of same duplex wall receptacle and to other
> wall receptacles on same circuit.
>
> Nothing inside a shunt mode protector stops or blocks surges.
> Protection is about diverting surges before surges gets to the
> appliance. Protector is designed with transients "getting through the
> AC surge protector". That direct connection is what wire inside the
> protector does.
Rant on Tom. Others have provided links to credible sources, like the
IEEE, that clearly state that plug in surge protectors can be effective
and part of a tiered protection system. They even clearly show a
diagram in chapter 6 of exactly the settup that saved my PC and FAX,
while the unprotected Tivo got whacked. Now, who should we believe,
you or the IEEE?
happened.
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