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#171
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Of course not. I have no affiliation with any of those
companies. Why would I mention the competition so often? But this is basic and essential information when doing anything that requires reliable operation such as aerospace work and semiconductor factories. Ever see all computers damaged just before a space launch because the facilities were not properly earthed? Over the years, I have had some mysterious failures and spectacular successes. Most early lessons were on friends homes. Have seen MOVs completely vaporized so that only two lead exist - an eerie scene. Have seen everything - literally every electronic device - damaged except on one circuit protected by (what I now know to be) an undersized but properly located MOV. That MOV, earthed by less than three foot connection, shunted a surge so large as to partially damage the electric meter. All other circuits exposed to that strike suffered complete damage. This one protected circuit with such a short earth ground connection suffered not one failure - except where the surge passed through electric meter to get to earth ground. That one experience got me heavily into questioning surge protectors. Discovered myths all but promoted by plug-in protector manufacturers AND the highly rated products from real world protector companies such as Polyphaser. Tim Auton wrote: w_tom, do you work for a company involved in the manufacture, distribution, sales or installation of whole-house surge protectors? |
#172
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In uk.comp.vendors w_tom wrote:
damage the electric meter. All other circuits exposed to that strike suffered complete damage. This one protected circuit 'complete damage', as opposed to 'incomplete damage' no doubt. -- Chris Green |
#173
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In uk.comp.vendors w_tom wrote:
If a surge was not due to lightning, then it would have been one of those other often rare type of events - that the How the #@$£"&^ can something be "often rara"!? -- Chris Green |
#174
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#175
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On Mon, 12 Jul 2004 21:55:21 +0100, half_pint wrote:
See above, if you handle computer components without observing ESD precautions you probably have, just you don't realize it. Well may conputer works just fine, I have touched the circuit boards many times whilst changing memory and drives etc... I dont wear an anti static band rtc.. It appears to be working perfectly well. You can ride a motorbike all your life without a crash helmet. Does not make it a sensible proposition. This is the realm of statistics, something that the general public seem to have a great deal problem understanding. You seem to be one. JAB. -- Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk Northumberland, United Kingdom. Tel: +44 1661-832195 |
#176
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"Jonathan Buzzard" wrote in message news On Mon, 12 Jul 2004 21:55:21 +0100, half_pint wrote: See above, if you handle computer components without observing ESD precautions you probably have, just you don't realize it. Well may conputer works just fine, I have touched the circuit boards many times whilst changing memory and drives etc... I dont wear an anti static band rtc.. It appears to be working perfectly well. You can ride a motorbike all your life without a crash helmet. Does not make it a sensible proposition. This is the realm of statistics, something that the general public seem to have a great deal problem understanding. You seem to be one. Well maybe you are one of the fools who think wearing a crash helmet will make jack **** of difference in 99% of mototcycle accidents. Worse still the false sense of security will probably mean you are more lilkely to end up dead or crippled. And you can add to that the fact that you senses of vision and hearing are severly diminished, makeing an accident even more likely. However don't let commonsense cloud you judgement, just stick to some really simplistic idea which you think you can understand. No point in taxing your brain too much. JAB. -- Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk Northumberland, United Kingdom. Tel: +44 1661-832195 |
#177
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"John McGaw" wrote in message .. . "Lem" wrote in message ... Are surge protectors on the main power supply actually needed in the UK? here in the UK we have few overhead mains power lines and have a relatively steady mains power supply when compared to many other countries (including the US). However there seem to be very many surge protector products advertised for sale in the UK (Argos, Maplins, etc). I am quite sure it is not bad practice to use a surge protector but in fact I have never known anyone who has has a problem from a surge coming in through the power supply. So personally I don't bother using a surge protector on my PC. Am I being too complacent? Do you live in an area where lightning is frequent? A lightning strike that is merely _near_ to an underground utility circuit can induce damaging voltages into them meaning that your power mains, telephone, and cable TV are all possible carriers. Admittedly there is no place in the UK that I've heard of that experiences the sort of storms that ravage parts of the USA, Flordia comes immediately to mind, but if you ever do have even one event then a small investment in protection would be invaluable. -- John McGaw [Knoxville, TN, USA] http://johnmcgaw.com Hi John! I am glad to see someone finally point out that overhead power lines and phone lines are much more apt to cause problems with lightning surges than are their underground equivalents. And also point out that amount of lightning strikes varies with geography. I don't know what it's like in Tennessee, but we sure have plenty in the Tampa, Lakeland, Daytona Beach across Florida as you point out. |
#178
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"Cuzman" wrote in message ... "Lem" wrote in message ... " Am I being too complacent? " Think of this when you next take a ****. http://news.bbc.co.uk/1/hi/england/s...re/3457965.stm Hey Cuzman, the article was very interesting but I saw nothing relating it to lightning, but rather to a fault in HV cables beneath the public unit. |
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