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#61
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Is Zone Alarm necessary with a DSL firewall?
Surge damage occurs typically once every seven years. Sample the
neighborhood for a better local number. Damage may occur with or without modem on. Depending on a human to disconnect wires (even to furnace) is unreliable and unnecessary. An earthed 'whole house' solution is so effective and costs so much less money. Others erroneously suggested using a UPS. A recommended 'whole house' protector costs about $1 per protected appliance - DSL modem and other items essential to human safety would be protected. An ineffective $25 or $100 plug-in solution obviously unnecessary, ineffective, and expensive. Fact that previous damage existed (and you got lucky with no modem damage) means a single and so effective 'whole house' protector provides benefits - such as eliminating all that unplugging. Pappion wrote: I only wanted to know if I should keep my Zone Alarm operating when I have XP Pro, and a DSL firewall in the modem--it was turned on by going to my IE browser and entering my IP address, and clicking "ON." That's all I needed. the only time I've had a fried situation was after leaving home for a week, and returning I had no Internet. It was really the phone cord (I'd forgotten to unplug it from the wall outlet), and it was a 50' cord that had to go from my office, over the doorways, into another room, and it was fried. My modem did have to be replaced, but nothing else was affected, except my pride. |
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#62
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[OT Now] UPS's are effective at protecing devices
Leythos wrote in
: What do you want to bet that IF he replies he doesn't answer that question. He won't be back Leythos. w_tom is exactly like a troll in new.software.readers named AlanConner. AC is EXACTLY the same way.....makes claim's and when questioned about it, or given info contradicting him, he NEVER addresses those. AC has been around a LONG time too. So long that there is at least one web page about him. http://www.pearlgates.net/nanae/kooks/ac/ Time to put this thread to rest. Regards, DanS |
#63
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[OT Now]
Leythos wrote in
: SNIP Time to put this thread to rest. Sorry, you're right, I think I actually let him get under my skin for a moment. Dang, almost never had that happen in the 20+ years I've been on Usenet. Oh, and here is something interesting, I'm actually 70 miles from the nearest city, moving 65mph, with my laptop connected to a 2000W inverter, and my verizon wireless broadband card, and then VPN'd into my office, where I'm bridging through my network to use the Usenet server in my local area to post this I'm amazed at how well connected we can be when we want to be - getting almost 600kpbs and I'm 70! miles from any major city. People like that get under my skin too. Believe me, I'm all for intelligent discussions, debates, and even some actual arguing. In the help newsgroups though, there aren't many actual discussions that go on, just helping people to get there stuff together. And really, how can you debate a blown-up PSU, or whatever. But w_ (dubya_) needs to get a grip. And about the mobile broadband........I'm just wrapping up a project to provide wi-fi wireless to riders of mass transit. The first systems are going in in California. Just what people need, more opportunity to work on the way to work AND the way back home !!!! |
#64
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[OT Now]
DanS wrote:
People like that get under my skin too. Believe me, I'm all for intelligent discussions, debates, and even some actual arguing. In the help newsgroups though, there aren't many actual discussions that go on, just helping people to get there stuff together. And really, how can you debate a blown-up PSU, or whatever. But w_ (dubya_) needs to get a grip. DanS is invited to put forth some technical numbers. Those who disagree post insults as technical proof. Where does the cadre of nay-sayers post manufacturer numerical specifications for each type of transient? They do not because those numbers - those technical facts - do not exist. Most damning is Leythos who ignores all those undamaged and unprotected appliances to proclaim his few surge protectors did something useful. Leythos uses 'selective data sampling' apparently because he has 'invisible' protectors. An informed person does not care what is under their skin. An informed person has numbers, facts, industry professional citations, etc to prove a point. So where are numbers from a UPS manufacturer that define protection from a typically destructive transient? Those numbers do not exist. DanS, et al never provide those numbers. Leythos spins 'selective sampling' to prove his myth. Where is the dedicated earthing wire necessary for effective protection? That earthing wire does not exist for plug-in solutions. Damning facts. What is necessary for protecting a DSL modem? Telco already installed a 'whole house' protector with essential earthing connection on phone line. Why? Because a well earth protector (installed for free by the telco) is so effective and so inexpensive. But AC electric has no such protection required by code. Responsible manufacturers of effective protectors (Siemens, Intermatic, Cutler-Hammer, Square D, GE, Leviton, etc) sell effective solutions in Home Depot, Loews, and electrical supply houses. How do we know these are effective? Each has a necessary and dedicated earthing wire as 'recommended' by IEEE Standards.. A 'whole house' protector is essential for protecting DSL modem and every other household appliance. A protector that is not 'invisible' and that actually does earth transients. That plug-in UPS does not even provide spec numbers for protection. One is even a pathetic 900 joules. Another using the same circuit sells for $160. Effective protectors cost about $1 per protected appliance. Myths promote those grossly overpriced and ineffective plug-in solutions. One irrefutable fact as well proven by industry professional and denied by those promoting 'miracle' plug-in solutions: no earth ground means no effective protection. Good reason why responsible manufacturers sell 'whole house' protectors with that necessary earthing wire. No reason for skin to crawl. Effective solutions also costs tens of times less money as well as provide effective protection for everything inside a building. |
#65
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Earthgrounding
Pappion wrote:
Is the answer then to literally unplug the surge suppressor from the wall outlet??? A plug-in protector can be a kludge solution. First, building earthing should be upgraded to post-1990 code which means an earthing electrode is connected typically 'less than 10 foot' to AC breaker box. Second, cut power cord short and connect it to AC receptacle on breaker box. Now that AC phase has a short connection to earth - can provide some protection. Again, this is a kludge solution. One reason is because the power strip protector is typically so undersized (and yet costs so much money). Minimally sized protectors earth a nearby and direct strike - and remain functional. That is but another reason why a 'whole house' protector from Siemens, Cutler-Hammer, Leviton, Intermatic, GE, etc are so effective. Bud promotes plug-in protector manufacturers. Therefore he will avoid some facts. His 'recommendation' is really a technical discussion of how different protectors can and fail to protect. Recommendations, instead, are found in standards. Bud will not challenge that blunt IEEE statement from the Red Book: In actual practice, lightning protection is achieve by the process of interception of lightning produced surges, diverting them to ground, and by altering their associated wave shapes. To convert a plug-in protector to something useful, plug it into a wall receptacle that makes a short connection to earth - as IEEE says is necessary for protection. IOW cut that six foot power strip cord short so that entire connection from power strip to earth ground is 'less than 10 feet'. A shorter connection to earth means even better protection. Earthing is the protection. Therefore each protected and incoming utility wire makes a 'less than 10 foot' connection to same earth ground. Defined above is 'secondary' protection. Also confirm integrity of your 'primary' surge protection: http://www.tvtower.com/fpl.html Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf Two structures (antenna and building): each has a single point earth ground. To make both earthings more effective, a ground wire interconnects both earthing electrodes. Yes, even the underground phone wire is earthed where it enters a building - as the figure indicates. Every incoming wire on every cable must connect to a common earthing electrode - either directly or via a 'whole house' protector. Effective protection is a building wide solution. Each protection 'layer' is defined by a common earthing electrode. Earthing should be upgraded to meet and exceed post-1990 National Electrical Code requirements because earthing provides appliance protection from direct lightning strikes. |
#66
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Earthgrounding
Wah, what a bunch of blatant misinformation, misunderstanding and perversion
of the facts! This w_tom can be nothing but a blathering idiot looking for attention by trolling with misinformed guesses and outright, incorrect information and interpretations. Another name for the never-read file. w_tom wrote: Pappion wrote: Is the answer then to literally unplug the surge suppressor from the wall outlet??? A plug-in protector can be a kludge solution. First, building earthing should be upgraded to post-1990 code which means an earthing electrode is connected typically 'less than 10 foot' to AC breaker box. Second, cut power cord short and connect it to AC receptacle on breaker box. Now that AC phase has a short connection to earth - can provide some protection. Again, this is a kludge solution. One reason is because the power strip protector is typically so undersized (and yet costs so much money). Minimally sized protectors earth a nearby and direct strike - and remain functional. That is but another reason why a 'whole house' protector from Siemens, Cutler-Hammer, Leviton, Intermatic, GE, etc are so effective. Bud promotes plug-in protector manufacturers. Therefore he will avoid some facts. His 'recommendation' is really a technical discussion of how different protectors can and fail to protect. Recommendations, instead, are found in standards. Bud will not challenge that blunt IEEE statement from the Red Book: In actual practice, lightning protection is achieve by the process of interception of lightning produced surges, diverting them to ground, and by altering their associated wave shapes. To convert a plug-in protector to something useful, plug it into a wall receptacle that makes a short connection to earth - as IEEE says is necessary for protection. IOW cut that six foot power strip cord short so that entire connection from power strip to earth ground is 'less than 10 feet'. A shorter connection to earth means even better protection. Earthing is the protection. Therefore each protected and incoming utility wire makes a 'less than 10 foot' connection to same earth ground. Defined above is 'secondary' protection. Also confirm integrity of your 'primary' surge protection: http://www.tvtower.com/fpl.html Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf Two structures (antenna and building): each has a single point earth ground. To make both earthings more effective, a ground wire interconnects both earthing electrodes. Yes, even the underground phone wire is earthed where it enters a building - as the figure indicates. Every incoming wire on every cable must connect to a common earthing electrode - either directly or via a 'whole house' protector. Effective protection is a building wide solution. Each protection 'layer' is defined by a common earthing electrode. Earthing should be upgraded to meet and exceed post-1990 National Electrical Code requirements because earthing provides appliance protection from direct lightning strikes. |
#67
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[OT Now]
"w_tom" wrote in news:1163627884.763097.267420
@b28g2000cwb.googlegroups.com: DanS wrote: People like that get under my skin too. Believe me, I'm all for intelligent discussions, debates, and even some actual arguing. In the help newsgroups though, there aren't many actual discussions that go on, just helping people to get there stuff together. And really, how can you debate a blown-up PSU, or whatever. But w_ (dubya_) needs to get a grip. DanS is invited to put forth some technical numbers. Those who disagree post insults as technical proof. Where does the cadre of nay-sayers post manufacturer numerical specifications for each type of transient? They do not because those numbers - those technical facts - do not exist. Most damning is Leythos who ignores all those undamaged and unprotected appliances to proclaim his few surge protectors did something useful. Leythos uses 'selective data sampling' apparently because he has 'invisible' protectors. An informed person does not care what is under their skin. An informed person has numbers, facts, industry professional citations, etc to prove a point. So where are numbers from a UPS manufacturer that define protection from a typically destructive transient? Those numbers do not exist. DanS, et al never provide those numbers. Leythos spins 'selective sampling' to prove his myth. Where is the dedicated earthing wire necessary for effective protection? That earthing wire does not exist for plug-in solutions. Damning facts. SNIPPED blah...blah....blah And you choose to ignore that devices protected survive while some unprotected devices do not. (Again, claiming they are proteced by the invisible surge supressors placed by the surge suppressor fairies.) At this point though, I am definately not going to reply to you again, and should have stopped days ago. I am just pointing out a couple of things one last time..... 1) I NEVER RECOMMENDED ANY TYPE OF SURGE SUPPRESSION OVER WHOLE HOUSE PROTECTION, YOU ARE THE ONE THAT BROUGHT WHOLE HOUSE PROTECTION INTO THE DISCUSSION. 2) WHILE THEORY IS GREAT, IT IS ONLY THEORY. 3) YOU CAN NOT CHOOSE TO IGNORE REAL-WORLD RESULTS JUST BECAUSE THEY DON'T JIVE WITH THEORY, TIME AND TIME AGAIN. 4) YOU HAVE BEEN HAVING THIS SAME ARGUMENT WITH HUNDREDS OF PEOPLE OVER A FIVE YEAR SPAN ON USENET, DON'T YOU THINK IT'S TIME TO GIVE IT UP. MANY PEOPLE IN OTHER GROUPS, FROM WHAT I HAVE READ IN SOME OF THOSE THREADS, DETEST *ANY* QUESTIONS ABOUT SUGRE SUPPRESSION FROM ANYONE, FOR FEAR YOU WILL CHIME IN ON THE THREAD. THAT SAYS IT ALL. Good Night Gracie........ |
#68
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Earthgrounding
Second, cut power cord short and connect it to AC receptacle on breaker box. Bizarre idea of the month. One reason is because the power strip protector is typically so undersized (and yet costs so much money). Plug-in suppressors are available in ratings from junk to very high. You pay for what you get (but are available at reasonable ratings relatively cheaply). Bud promotes plug-in protector manufacturers. Quoting w_: "It is an old political trick. When facts cannot be challenged technically, then attack the messenger." Therefore he will avoid some facts. His 'recommendation' is really a technical discussion of how different protectors can and fail to protect. Recommendations, instead, are found in standards. I base arguments on the IEEE and NIST guides. You have to be stupid to say the guides, intended for the general public, would waste a lot of space on "technical discussion'" about a device the guides don't recommend. Bud will not challenge that blunt IEEE statement from the Red Book: You also have to be stupid to say the IEEE guide would conflict with the IEEE color books. Earthing is the protection. Therefore each protected and incoming utility wire makes a 'less than 10 foot' connection to same earth ground. Your religious views on earthing are not shared by the IEEE or NIST. Plug-in surge suppressors, as described clearly in the IEEE guide, work primarily by clamping the voltages on all wires (power and signal) to the common ground at the surge suppressor, not by earthing. Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf w_ has a fetish about 200+ ft lightning rods, aka tower antennas. The rest of us do not expect our equipment to survive a direct lightning hit to our house. The IEEE and NIST guides clearly say that plug-in suppressors are effective. Links to sites that say plug-in suppressors are effective: 2 Your links to sites that say plug-in suppressors are not effective: 0 --- bud-- |
#69
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Earthgrounding
bud-- wrote:
Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf w_ has a fetish about 200+ ft lightning rods, aka tower antennas. The rest of us do not expect our equipment to survive a direct lightning hit to our house. AC electric wires above the street are 'antennas' connected directly to every AC appliance inside a house. What is struck more often? Highest wires connect lightning directly to household electronics. We expect lightning to strike that wire - a direct strike to the house - resulting in zero appliance damage. Lightning striking that wire is a direct strike to AC appliances IF surge is not properly earthed by one well proven 'whole house' protector. Bud does "not expect our equipment to survive a direct lightning strike" because Bud recommends plug-in protectors with no earthing. Direct lightning strikes to household appliances means equipment still survives. It means protection inside all appliances is not overwhelmed. No damage from direct lightning strikes was proven about 25 times annually atop the Empire State Building even in the 1930. Technology has been that well proven for that long. A protector is only as effective as its earth ground which plug-in solutions must ignore to sell grossly undersized and overpriced plug-in protectors. No wonder plug-in protectors avoid earthing discussions. Names such APC, Tripplite, Isobar, Belkin, and Monster Cable were not in that list of responsible protector manufacturers. How do you know? Where is their dedicated earthing wire? Earthing wire does not exist on ineffective protectors. Direct lightning strikes to household appliances via something similar to an antenna (utility wires) means no damage if one properly earthing 'whole house' protector is installed. That's one dollar per protected appliance verses $25 or $100 per appliance for ineffective plug-in solutions. Learn from the industry professional at: http://www.erico.com/public/library/...es/tncr002.pdf No earth ground means no effective protection. Necessary for DSL modems. Telco installs a properly earthed 'whole house' protector on phone lines - for free. But homeowner must install same on AC electric to protect a DSL modem - and computer. |
#70
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Earthgrounding
w_tom wrote:
bud-- wrote: Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf w_ has a fetish about 200+ ft lightning rods, aka tower antennas. The rest of us do not expect our equipment to survive a direct lightning hit to our house. AC electric wires above the street are 'antennas' connected directly to every AC appliance inside a house. What is struck more often? Highest wires connect lightning directly to household electronics. We expect lightning to strike that wire - a direct strike to the house - resulting in zero appliance damage. Lightning striking that wire is a direct strike to AC appliances IF surge is not properly earthed by one well proven 'whole house' protector. Bud does "not expect our equipment to survive a direct lightning strike" because Bud recommends plug-in protectors with no earthing. Direct lightning strikes to household appliances means equipment still survives. It means protection inside all appliances is not overwhelmed. No damage from direct lightning strikes was proven about 25 times annually atop the Empire State Building even in the 1930. Technology has been that well proven for that long. A protector is only as effective as its earth ground which plug-in solutions must ignore to sell grossly undersized and overpriced plug-in protectors. No wonder plug-in protectors avoid earthing discussions. Names such APC, Tripplite, Isobar, Belkin, and Monster Cable were not in that list of responsible protector manufacturers. How do you know? Where is their dedicated earthing wire? Earthing wire does not exist on ineffective protectors. Direct lightning strikes to household appliances via something similar to an antenna (utility wires) means no damage if one properly earthing 'whole house' protector is installed. That's one dollar per protected appliance verses $25 or $100 per appliance for ineffective plug-in solutions. Learn from the industry professional at: http://www.erico.com/public/library/...es/tncr002.pdf No earth ground means no effective protection. Necessary for DSL modems. Telco installs a properly earthed 'whole house' protector on phone lines - for free. But homeowner must install same on AC electric to protect a DSL modem - and computer. You dumb cluck. Every house is grounded at the entrance (meter) plus every power pole has a ground discharge, a copper wire running the length of the pole into the ground. Where do you live, in Antartica or what? John |
#71
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Earthgrounding
John John wrote:
You dumb cluck. Every house is grounded at the entrance (meter) plus every power pole has a ground discharge, a copper wire running the length of the pole into the ground. ... Well John John - is your house earthed per post 1990 National Electrical Code requirements? Many are not even though you insist otherwise.. Others are missing even a 'no longer sufficient' earthing to water pipe. Apparently you did not bother to read previous posts and did not grasp the technicals. Most homes are not earthed as that industry professional figure demonstrates. Apparently you magically knew otherwise without first reading what you replied to. For surge protection, earthing must meet .... and exceed ... post 1990 code requirements. That means every wire in every cable must connect to earth as defined earlier. Don't bother replying to that last sentence until learning details of 'connect to earth'. It is intentionally vague since details were posted previously. Even that telephone pole earth ground was defined in prevous posts that you never read. Next time, John John, you might want to first read before replying; also learn about concepts such as wire impedance. Wire impedance is why 'secondary' protection should be earthed 'less than 10 feet'. You even assume that earthing still exists - is intact? Too many say the lights work; therefore earthing is OK. Only visual inspection can confirm that earthing exists - as prevously posted pictures demonstrated. Learn before jumping to insult. It suggests how inexperienced you still are. No earth ground means no effective protection. Learn about primary and secondary protection systems defined earlier. |
#72
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Earthgrounding
I don't know what the electrical code is in your country but in this
country no earthing = no power. It's a must. John w_tom wrote: John John wrote: You dumb cluck. Every house is grounded at the entrance (meter) plus every power pole has a ground discharge, a copper wire running the length of the pole into the ground. ... Well John John - is your house earthed per post 1990 National Electrical Code requirements? Many are not even though you insist otherwise.. Others are missing even a 'no longer sufficient' earthing to water pipe. Apparently you did not bother to read previous posts and did not grasp the technicals. Most homes are not earthed as that industry professional figure demonstrates. Apparently you magically knew otherwise without first reading what you replied to. For surge protection, earthing must meet .... and exceed ... post 1990 code requirements. That means every wire in every cable must connect to earth as defined earlier. Don't bother replying to that last sentence until learning details of 'connect to earth'. It is intentionally vague since details were posted previously. Even that telephone pole earth ground was defined in prevous posts that you never read. Next time, John John, you might want to first read before replying; also learn about concepts such as wire impedance. Wire impedance is why 'secondary' protection should be earthed 'less than 10 feet'. You even assume that earthing still exists - is intact? Too many say the lights work; therefore earthing is OK. Only visual inspection can confirm that earthing exists - as prevously posted pictures demonstrated. Learn before jumping to insult. It suggests how inexperienced you still are. No earth ground means no effective protection. Learn about primary and secondary protection systems defined earlier. |
#73
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Earthgrounding
My house was built in 1977 and even then the power company would not
have connected without earthing at the meter. In this country we have long ago abandoned knob and tube wiring... John w_tom wrote: John John wrote: You dumb cluck. Every house is grounded at the entrance (meter) plus every power pole has a ground discharge, a copper wire running the length of the pole into the ground. ... Well John John - is your house earthed per post 1990 National Electrical Code requirements? Many are not even though you insist otherwise.. Others are missing even a 'no longer sufficient' earthing to water pipe. Apparently you did not bother to read previous posts and did not grasp the technicals. Most homes are not earthed as that industry professional figure demonstrates. Apparently you magically knew otherwise without first reading what you replied to. For surge protection, earthing must meet .... and exceed ... post 1990 code requirements. That means every wire in every cable must connect to earth as defined earlier. Don't bother replying to that last sentence until learning details of 'connect to earth'. It is intentionally vague since details were posted previously. Even that telephone pole earth ground was defined in prevous posts that you never read. Next time, John John, you might want to first read before replying; also learn about concepts such as wire impedance. Wire impedance is why 'secondary' protection should be earthed 'less than 10 feet'. You even assume that earthing still exists - is intact? Too many say the lights work; therefore earthing is OK. Only visual inspection can confirm that earthing exists - as prevously posted pictures demonstrated. Learn before jumping to insult. It suggests how inexperienced you still are. No earth ground means no effective protection. Learn about primary and secondary protection systems defined earlier. |
#74
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Earthgrounding
On Nov 16, 3:22 pm, "w_tom" wrote: bud-- wrote: Finally, as a ham, then appreciate this figure from industry professionals: http://www.erico.com/public/library/...es/tncr002.pdf w_ has a fetish about 200+ ft lightning rods, aka tower antennas. The rest of us do not expect our equipment to survive a direct lightning hit to our house. AC electric wires above the street are 'antennas' connected directly to every AC appliance inside a house. What is struck more often? Highest wires connect lightning directly to household electronics. We expect lightning to strike that wire - a direct strike to the house - resulting in zero appliance damage. Lightning striking that wire is a direct strike to AC appliances IF surge is not properly earthed by one well proven 'whole house' protector. In addition to the comments of John John - a lightning rod, aka tower antenna, is far higher than the distribution wires near a house; a tower antenna is FAR more likely to be hit by lightning - a direct strike to a house, equivalent to a hit to an adjacent tower antenna, is VERY unlikely - distribution wires, which are mounted highest on power poles in neighborhoods, are likely to have lightning arresters, and surges will have to pass thorough power transformers - a hit to distribution wires has significant impedance (you are fond of impedance) to my house - the further away the hit the higher impedance - which greatly reduces the surge intensity - in addition, a hit to distribution wires is divided by all multiple paths to ground - if the secondary wires behind my house (or even the service drop to my house) is hit, the surge is divided between my house, and grounding through the transformer and all other users on that transformer; it will also be divided if it comes through the transformer So no, I don't think your fetish with tower antennas is particularly relevant to houses. Bud does "not expect our equipment to survive a direct lightning strike" because Bud recommends plug-in protectors with no earthing. I don't remember posts from anyone who thought their house would survive a direct lightning hit No damage from direct lightning strikes was proven about 25 times annually atop the Empire State Building even in the 1930. Technology has been that well proven for that long. A stupid comparison. The Empire State Building has a steel frame which is highly conductive because of large metal cross section and multiple paths. Like sitting in a car that is hit by lightning. A protector is only as effective as its earth ground which plug-in solutions must ignore Your religious views about earthing are still not shared by the IEEE and NIST. Plug-in surge suppressors still work primarily by clamping, not earthing. No earth ground means no effective protection. And the required statement of religious belief again. The IEEE and NIST guides clearly say that plug-in suppressors are effective. Links to sites that say plug-in suppressors are effective: 2 Your links to sites that say plug-in suppressors are not effective: 0 You are alone on this. -- bud-- |
#75
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Earthgrounding
John John wrote:
My house was built in 1977 and even then the power company would not have connected without earthing at the meter. In this country we have long ago abandoned knob and tube wiring... And that requirement is sufficient only for human safety. Power company cares not whether your appliances have any protection - or are even damaged every year. They are only concerned about earthing for human safety. Chances are your earthing is not sufficient for transistor safety. Did you read many posts and technical reasons for enhanced earthing? Most 1977 homes have earthing woefully insufficient for transistorized appliances AND have virtually no 'whole house' appliance protection. Does you telephone service have properly earthing protection - that was only introduced in the mid 1980s? Again, those many older telephone installations were only earthed for human safety - not for today's phones. Did you learn from previous posts to discover if your earthing is sufficient? Or did you just know and therefore post disparagement accordingly? Chances are that a house built in 1977 needs its earthing for all utilities upgraded. Chances are your earthing is the equivalent of knob and tube wiring. Did you read those posts or just *assume* 1977 earthing will always be sufficient? You have much learning to do. |
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