Re: Lightning and computer?
- From: w_tom <w_tom1@xxxxxxxxxxx>
- Date: Fri, 22 Apr 2005 00:13:13 -0400
A PC typically does connect to the equivalent of antennas.
Wires atop utility poles connect directly to your PC just like
a radio antenna. Same is also true of buried power lines.
Protection of the PC is same as protection of those Ham's
equipment.
Yes if one disconnects everytime and all wires, then
increased protection is obtained. But you tell me how many
hours a day a human is available to do that. 8? Maybe less.
That assumes disconnecting repeatedly from a receptacle rated
for a limited number of connection cycling. That assumes the
human using the machine will know something is coming that
second and pull the plug - no Windows shutdown. Or your could
spend about $1 per appliance to make disconnecting
unnecessary.
The point is that with proper earthing and the 'whole house'
protector, then all that disconnecting is made completely
irrelevant. How did those Hams stop suffering damage? They
earthed. What does the 'whole house' protector provide for
you computer and smoke detector, and furnace? Earthing
without human intervention. Protection that is not dependent
on a human is clearly more reliable.
Galen wrote:
> Two things combined from all sorts of posts...
>
> UNPLUGGING the PC from the wall in it's entirety WILL protect the PC
> from damage should there be a spike. No if's and's or but's about it
> except in a few rare exceptions... I may be mis-reading but I think
> it was you (the person I'm replying to) who said that this is not
> the case. I'm probably mis-reading something so don't take this
> personal please I just want to clarify some few things and put them
> in basic English for all to understand. Should the device be
> completely disconnected a strike from lightning will not harm it
> (assuming this includes phone line disconnection) unless it
> burns the house down or there's something called "ball lightning"
> which should happen to pass through it directly. (It may very well
> do so as it's going to "see" the held current in the monitor for
> instance and go to it as it's the least resistance.)
>
> *I double checked*
>
> Comparing this:
>
> "Ham radio operators would disconnect the antenna and suffer
> damage. They would disconnect the antenna, put the lead
> inside a mason jar, and still suffer damage. Then they
> connected the antenna to an earth ground. Not just any
> ground. Earth ground. No more damage. Disconnection is not
> an effective solution."
>
> I'm sorry but a PC hasn't got an antenna running into a dedicated
> room via wires that would carry electricity into the room. Well,
> not true... I suppose should this be one of the rare WiFi Broadband
> solutions (not popular yet) or a satellite connection there's some
> risk but both are surely grounded according to code in every state
> that I'm aware of. Comparing the technology of the 60's and 70's
> to today is hardly going to equate properly. Bear with me here
> and don't for one minute think that I'm disagreeing with you....
> I'm saying that the odds are so slim that it's a simple step
> that they, the OP, can and should take to add an additional layer
> of security...
.
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