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#1
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I used to own a house that was built on a stemwall foundation. I
grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? |
#2
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On Apr 27, 10:21*pm, Jonathan Sachs wrote:
I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Do it from above. R |
#3
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Jonathan Sachs wrote:
I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Got an attic? same process, mirror imaged... (and then you'll find all the firestops in the walls...) yes it is somewhat more difficult this way, a right angle drill can help. nate -- replace "roosters" with "cox" to reply. http://members.cox.net/njnagel |
#4
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RicodJour wrote:
On Apr 27, 10:21 pm, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Do it from above. R Peek in the boxes with a flashlight. If the place was built mid-1960s or later, odds are there will be a ground wire rolled up under the romex clamps. This 1960 house had ground cables in place- I just had to connect them when I switched out the 2-holers for 3-holers. Were the grounded outlets wired at the same time as the ungrounded ones? If so, probably same type of wire. And you did plug one of those quick-testers into the grounded outlets to make sure they really were grounded, right? (well worth the ten bucks to have one of those in the toolbox, IMHO.) -- aem sends... |
#5
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In article ,
Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Eh? What problem? |
#6
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Smitty Two wrote:
In article , Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Eh? What problem? Trying to ground wall outlets in a hiuse with a slab foundation rather than joists bearing on a concrete stemwall. The latter allows running a ground wire up to the wall outlet from the basement or crawl space. Can't do that with a slab foundation. -- When asked, years afterward, why his charge at Gettysburg failed, General Pickett said: "I've always thought the Yankees had something to do with it." |
#7
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![]() "Jonathan Sachs" wrote in message ... I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? *What year was the house built and what type of wiring is installed? |
#8
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On Apr 28, 3:02*am, wrote:
On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Get an pneumatic air hammer and break out about one foot of concrete under each outlet until you hit the ground (soil) under the concrete. Remove the outlet from the wall, and bury the entire outlet and box in the ground under the floor. *This will insure the outlet is well grounded. *Then pour fresh concrete over each outlet hole and smooth it to match the original floor. * For the locations where running a ground wire would be difficult or impossible, put in GFCI outlets and forget about grounding them. |
#9
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In article ,
Major Debacle wrote: Smitty Two wrote: In article , Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Eh? What problem? Trying to ground wall outlets in a hiuse with a slab foundation rather than joists bearing on a concrete stemwall. The latter allows running a ground wire up to the wall outlet from the basement or crawl space. Can't do that with a slab foundation. Clarification: Why does the OP choose to see ungrounded outlets as a *problem?* |
#10
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On Apr 28, 2:38*pm, Major Debacle
wrote: Smitty Two wrote: In article , *Major Debacle wrote: Smitty Two wrote: In article , *Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Eh? What problem? Trying to ground wall outlets in a hiuse with a slab foundation rather than joists bearing on a concrete stemwall. The latter allows running a ground wire up to the wall outlet from the basement or crawl space. Can't do that with a slab foundation. Clarification: Why does the OP choose to see ungrounded outlets as a *problem?* Careful... that's like questioning the existence of God. All my outlets are ungrounded. The only problems so far are trying to plug in a three pronged cord and a vague feeling of being somewhat behind the technology curve. Couple reasons why grounded outlets are a Good Thing: 1) If you have any power tools that have a metal case, you run the slight but non-zero risk of electrocution if there is a ground fault to the case internal to the tool. 2) Most surge suppressors are not guaranteed to function if not properly grounded. now whether these reasons are compelling enough to make you go through the process... nate |
#11
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N8N wrote:
On Apr 28, 2:38 pm, Major Debacle wrote: Smitty Two wrote: In article , Major Debacle wrote: Smitty Two wrote: In article , Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? Eh? What problem? Trying to ground wall outlets in a hiuse with a slab foundation rather than joists bearing on a concrete stemwall. The latter allows running a ground wire up to the wall outlet from the basement or crawl space. Can't do that with a slab foundation. Clarification: Why does the OP choose to see ungrounded outlets as a *problem?* Careful... that's like questioning the existence of God. All my outlets are ungrounded. The only problems so far are trying to plug in a three pronged cord and a vague feeling of being somewhat behind the technology curve. Couple reasons why grounded outlets are a Good Thing: 1) If you have any power tools that have a metal case, you run the slight but non-zero risk of electrocution if there is a ground fault to the case internal to the tool. And you are standing in a substantial puddle of water or hanging onto a water pipe with the other hand. 2) Most surge suppressors are not guaranteed to function if not properly grounded. now whether these reasons are compelling enough to make you go through the process... nate -- Rights Are Not Given, They Are Taken When asked, years afterward, why his charge at Gettysburg failed, General Pickett said: "I've always thought the Yankees had something to do with it." |
#12
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On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs
wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? How many appliances require a grounded ( 3 pin ) outlet ? In my house, that woiuld be the washing machine, and the fridge. As far as I know, all other plug-ins use a ( 2-pin ) polarized plug. So, unless your community requires 3-hole sockets, why bother ? Just be sure that the wide slot is "neutral". |
#13
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On Apr 28, 6:22�pm, "RJ" wrote:
On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? How many appliances require a grounded ( 3 pin ) outlet ? In my house, that woiuld be the washing machine, and the fridge. As far as I know, all other plug-ins use a ( 2-pin ) polarized plug. So, unless your community requires 3-hole sockets, why bother ? Just be sure that the wide slot is "neutral". when you decide to sell lack of grounds can move your home into the fixer upper low price category............. |
#14
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RJ wrote:
On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? How many appliances require a grounded ( 3 pin ) outlet ? In my house, that woiuld be the washing machine, and the fridge. As far as I know, all other plug-ins use a ( 2-pin ) polarized plug. So, unless your community requires 3-hole sockets, why bother ? Just be sure that the wide slot is "neutral". In my case, we have awful power, so I have two UPSes and tons of surge suppressors. If the worst should happen, the "protected equipment warranty" is void unless the UPS or surge suppressor is connected to a grounded outlet. This may sound like a far-fetched scenario for many people, but a whole mess of people in my neighborhood lost a lot of electronics a year or so ago when there was an "incident." Even with my "massive overkill" approach to surge protection, I lost a circuit board in my air filter (at that time not protected; now it is) a circuit board in my dishwasher (only protected by the main panel surge suppressor because it's hardwired) and a really old surge strip. Dominion Power denied any responsibility; I repaired all the equipment myself so the cash outlay was below what our homeowner's deductable would have been. (lost receipt for the main surge suppressor breaker) nate -- replace "roosters" with "cox" to reply. http://members.cox.net/njnagel |
#15
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On Tue, 28 Apr 2009 02:45:29 GMT, aemeijers wrote:
Peek in the boxes with a flashlight. If the place was built mid-1960s or later, odds are there will be a ground wire rolled up under the romex clamps. The house was built in 1960. I'm hoping the boxes are grounded, but if they are not, I'd like to have a Plan B. And you did plug one of those quick-testers into the grounded outlets to make sure they really were grounded, right? I haven't done that yet because I don't own the house yet, but the home inspector did it, and he reported that several three-hole outlets in the original living space are _not_ grounded. A couple of people suggested going down from the attic. I haven't examined the attic yet (see above), but I've done that before, and I can testify that several things can make it impossible, or nearly so: an outside wall under the eaves; any outside wall that has been insulated; any wall with bracing. I'm hoping there's a better way. |
#16
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Jonathan Sachs wrote:
On Tue, 28 Apr 2009 02:45:29 GMT, aemeijers wrote: Peek in the boxes with a flashlight. If the place was built mid-1960s or later, odds are there will be a ground wire rolled up under the romex clamps. The house was built in 1960. I'm hoping the boxes are grounded, but if they are not, I'd like to have a Plan B. And you did plug one of those quick-testers into the grounded outlets to make sure they really were grounded, right? I haven't done that yet because I don't own the house yet, but the home inspector did it, and he reported that several three-hole outlets in the original living space are _not_ grounded. A couple of people suggested going down from the attic. I haven't examined the attic yet (see above), but I've done that before, and I can testify that several things can make it impossible, or nearly so: an outside wall under the eaves; any outside wall that has been insulated; any wall with bracing. I'm hoping there's a better way. I'm no code expert, but I recall from previous grounded-outlet threads on here that some folks said running a ground wire via a different route than the feed wire, was not code-compliant. As to some of your 3-holers showing up as non-grounded- I also had some like that, that were merely wired backward. Swapped the black and white wires, and the tester was happy. If the boxes are not grounded, and there is no painless way to run new wire to the outside walls, you may have to pick and choose which outlets Really Need to be grounded. My other house down in Louisiana is on a slab, and we had to add a couple strings to feed select spots, like for the computers, microwave, and such, on interior walls. -- aem sends... |
#17
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![]() "Nate Nagel" wrote in message ... RJ wrote: On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? How many appliances require a grounded ( 3 pin ) outlet ? In my house, that woiuld be the washing machine, and the fridge. As far as I know, all other plug-ins use a ( 2-pin ) polarized plug. So, unless your community requires 3-hole sockets, why bother ? Just be sure that the wide slot is "neutral". In my case, we have awful power, so I have two UPSes and tons of surge suppressors. If the worst should happen, the "protected equipment warranty" is void unless the UPS or surge suppressor is connected to a grounded outlet. This may sound like a far-fetched scenario for many people, but a whole mess of people in my neighborhood lost a lot of electronics a year or so ago when there was an "incident." Even with my "massive overkill" approach to surge protection, I lost a circuit board in my air filter (at that time not protected; now it is) a circuit board in my dishwasher (only protected by the main panel surge suppressor because it's hardwired) and a really old surge strip. Dominion Power denied any responsibility; I repaired all the equipment myself so the cash outlay was below what our homeowner's deductable would have been. (lost receipt for the main surge suppressor breaker) *Nate, make sure that you have a good grounding system for your home. A water pipe ground and ground rods should help with your problem |
#18
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On Apr 29, 8:04*am, "John Grabowski" wrote:
"Nate Nagel" wrote in message ... RJ wrote: On Mon, 27 Apr 2009 19:21:30 -0700, Jonathan Sachs wrote: I used to own a house that was built on a stemwall foundation. I grounded the electric outlets by drilling a hole up through the bottom plate under each outlet box, pushing ground wires up through the hole, and fishing them into the box. I'm now buying a house that is built on a slab, and many of the outlets are ungrounded. How should I deal with the problem in this case? How many appliances require a grounded ( 3 pin ) outlet ? In my house, that woiuld be the washing machine, and the fridge. As far as I know, all other plug-ins use a ( 2-pin ) polarized plug. So, unless your community requires 3-hole sockets, why bother ? Just be sure that the wide slot is "neutral". In my case, we have awful power, so I have two UPSes and tons of surge suppressors. *If the worst should happen, the "protected equipment warranty" is void unless the UPS or surge suppressor is connected to a grounded outlet. This may sound like a far-fetched scenario for many people, but a whole mess of people in my neighborhood lost a lot of electronics a year or so ago when there was an "incident." *Even with my "massive overkill" approach to surge protection, I lost a circuit board in my air filter (at that time not protected; now it is) a circuit board in my dishwasher (only protected by the main panel surge suppressor because it's hardwired) and a really old surge strip. *Dominion Power denied any responsibility; I repaired all the equipment myself so the cash outlay was below what our homeowner's deductable would have been. *(lost receipt for the main surge suppressor breaker) *Nate, make sure that you have a good grounding system for your home. A water pipe ground and ground rods should help with your problem- Hide quoted text - It appears to be OK although I have not investigated thoroughly (how would one test something concealed like ground rods anyway?) but everything inside the house looks copacetic. What apparently happened was that a tree fell on a high voltage power line which fell on top of a lower voltage power line thus momentarily producing a voltage 10x or more normal. With what should have been an odd failure, I feel lucky to get away as easy as I did. But that prompts a question - short of going outside and digging along the ground cable and inspecting the number of buried ground rods, how would one determine if an older house does in fact have proper grounding? (I know, lift the neutral to the pole and see if anything blows up...) Actually you just reminded me that we just replaced our fridge which WAS an old, purely mechanical device with a fancy new one with an electronic control/display.... probably should slap a point of use surge protector on that as well. nate |
#19
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aemeijers wrote:
Jonathan Sachs wrote: On Tue, 28 Apr 2009 02:45:29 GMT, aemeijers wrote: Peek in the boxes with a flashlight. If the place was built mid-1960s or later, odds are there will be a ground wire rolled up under the romex clamps. The house was built in 1960. I'm hoping the boxes are grounded, but if they are not, I'd like to have a Plan B. And you did plug one of those quick-testers into the grounded outlets to make sure they really were grounded, right? I haven't done that yet because I don't own the house yet, but the home inspector did it, and he reported that several three-hole outlets in the original living space are _not_ grounded. The common 3 light testers will reliably show there is a problem (but could give the wrong problem). If the tester indicates there is a good ground there probably is, but not necessarily. If a "grounded" outlet is not grounded it can be replaced by a 2 prong non-grounding outlet. Most equipment these days does not have a ground pin. A couple of people suggested going down from the attic. I haven't examined the attic yet (see above), but I've done that before, and I can testify that several things can make it impossible, or nearly so: an outside wall under the eaves; any outside wall that has been insulated; any wall with bracing. I'm hoping there's a better way. At least one other post suggested using a GFCI outlet. It is NEC compliant and gives you a grounded type outlet. But no ground, which may or may not be a problem. The outlet should be labeled with a "No equipment ground" label that comes with the outlet. If the circuit continues past the GFCI outlet, the circuit can be connected to the load terminals of the GFCI, and outlets downstream will be protected. Outlets downstream of GFCI protection can be grounding type but must be labeled "No equipment ground" and "GFCI protected". The ground contacts of these outlets should not be interconnected by ground wires that are not actually grounded. I'm no code expert, but I recall from previous grounded-outlet threads on here that some folks said running a ground wire via a different route than the feed wire, was not code-compliant. Generally all wires have to run together but there is an exception for an ungrounded outlet - the ground wire can be run by itself. The added ground wire can go to anywhere on the "grounding electrode system". That includes the source panel ground bar, the heavy wires connecting to the grounding electrodes (often the easiest) or the first 5 feet of water pipe inside the building. -- bud-- |
#20
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On Apr 29, 8:31*am, N8N wrote:
But that prompts a question - short of going outside and digging along the ground cable and inspecting the number of buried ground rods, how would one determine if an older house does in fact have proper grounding? *(I know, lift the neutral to the pole and see if anything blows up...) Ground must be installed so that it can be inspected. Visual inspection is the only method to confirm an earth ground exists and is sufficient. Furthermore, every incoming utility must make a short connection to that same earthing electrode. IOW a gray NID telephone box contains a 'whole house' protector that must be earthed. Cable TV is earthed directly - no protector required. These ground wires should be traced to the same ground rod that is also just outside the breaker box. Grounding serves two functions. First is human safety. Code states what is required. Second function is surge protection. That means grounding must exceed those requirements. Connection from each utility wire (ie breaker box, telephone NID, cable ground block) must be short (ie 'less than ten feet'). Separated from other wires. Only meets all other ground wires at the same earth electrode. No sharp bends. Not inside metallic conduit. Violation of any of these means a ground for surge protection has been compromised. Remember what a surge proetctor does. Diverts energy to be harmlessly dissipated into earth. If ground via the safety ground wire inside romex, well, that wire also violates most every above requirement which is why 'point of use' protectors have no earthing. Which is why 'point of use' protectors do not even claim to protect from the type of surges that are typically destructive. Sounds like your best solution is to install new grounds so that all incoming utilities make that short connection to earth. Since a surge protector is defined by quality of its earthing, then additional earthing would make an effective protector even better. Earthing must meet and exceed post 1990 code requirements to accomplish what you are asking. Type of surge that typically destroys appliances is either earthed (dissipated harmlessly in earth) before entering a building. Or finds destructive paths through household appliances inside the house. A protector connected to earth via household wires (ie romex) is all but no earth ground. It may then earth that surge destructively through an appliance as we have seen so often. A surge diverted into and dissipated in earth need not enter a building - does not overwhelm protection that already exists inside every appliance. |
#21
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westom wrote:
The best information on surges and surge protection I have seen is at: http://www.mikeholt.com/files/PDF/LightningGuide_FINALpublishedversion_May051.pdf - "How to protect your house and its contents from lightning: IEEE guide for surge protection of equipment connected to AC power and communication circuits" published by the IEEE in 2005 (the IEEE is the major organization of electrical and electronic engineers in the US). And also: http://www.nist.gov/public_affairs/practiceguides/surgesfnl.pdf - "NIST recommended practice guide: Surges Happen!: how to protect the appliances in your home" published by the US National Institute of Standards and Technology in 2001 The IEEE guide is aimed at those with some technical background. The NIST guide is aimed at the unwashed masses. MOVs in service panel and plug-in suppressors are very effective at limiting the voltage from a surge, which is very short duration, even if it involves thousands of amps. Crossed power lines are far too long a duration and will rapidly burn out MOVs. The author of the NIST guide has written "in fact, the major cause of [surge suppressor] failures is a temporary overvoltage, rather than an unusually large surge." A few plug-in suppressors will disconnect on overvoltage, or a UPS may go to backup and protect connected equipment. Cable TV is earthed directly - no protector required. Ho-hum - the usual drivel back again. Doesn't need a protector? The IEEE guide says "there is no requirement to limit the voltage developed between the core and the sheath. .... The only voltage limit is the breakdown of the F connectors, typically ~2–4 kV." And "there is obviously the possibility of damage to TV tuners and cable modems from the very high voltages that can be developed, especially from nearby lightning." (A plug-in suppressor will limit the voltage from core to shield.) Remember what a surge proetctor does. Diverts energy to be harmlessly dissipated into earth. If ground via the safety ground wire inside romex, well, that wire also violates most every above requirement which is why 'point of use' protectors have no earthing. w_ has a religious belief (immune from challenge) that surge protection must directly use earthing. Thus in his view plug-in suppressors (which are not well earthed) can not possibly work. The IEEE guide explains plug-in suppressors work by CLAMPING (limiting) the voltage on all wires (signal and power) to the common ground at the suppressor. Plug-in suppressors do not work primarily by earthing (or stopping or absorbing). The guide explains earthing occurs elsewhere. (Read the guide starting pdf page 40). Note that all interconnected equipment needs to be connected to the same plug-in suppressor, or interconnecting wires need to go through the suppressor. External connections, like phone, also need to go through the suppressor. Connecting all wiring through the suppressor prevents damaging voltages between power and signal wires. The NIST guide, using US insurance information, suggests that most equipment damage is from high voltage between power and phone/cable wires. Which is why 'point of use' protectors do not even claim to protect from the type of surges that are typically destructive. Complete nonsense. Both the IEEE and NIST guides say plug-in suppressors are effective. Since a surge protector is defined by quality of its earthing, then additional earthing would make an effective protector even better. If you have a surge-produced current to earth of 1,000A with a very good resistance to earth of 10 ohms, the potential of the power "ground" at the house will rise 10,000V above "absolute" earth potential. Much of the "protection" is that power and phone and cable wires rise together. That requires a short ground wire from the cable and phone entry protectors to the "ground" at the power service. A ground wire that is too long is illustrated in the IEEE guide starting pdf page 40. The author of the NIST guide has written "the impedance of the grounding system to 'true earth' is far less important than the integrity of the bonding of the various parts of the grounding system." Type of surge that typically destroys appliances is either earthed (dissipated harmlessly in earth) before entering a building. Service panel suppressors are a good idea. But from the NIST guide: "Q - Will a surge protector installed at the service entrance be sufficient for the whole house? A - There are two answers to than question: Yes for one-link appliances [electronic equipment], No for two-link appliances [equipment connected to power AND phone or cable or....]. Since most homes today have some kind of two-link appliances, the prudent answer to the question would be NO - but that does not mean that a surge protector installed at the service entrance is useless." Service panel suppressors do not prevent high voltages from developing between power and signal wires. A refrigerator, a "one link appliance", would likely be protected by a service panel suppressor. For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. Then read w's sources that say plug-in suppressors do NOT work. There are none. w can't even answer simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? -- bud-- |
#22
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On Apr 30, 11:38*am, bud-- wrote:
The best information on surges and surge protection I have seen is at: http://www.mikeholt.com/files/PDF/LightningGuide_FINALpublishedversio... - "How to protect your house and its contents from lightning: IEEE guide for surge protection of equipment connected to AC power and communication circuits" *published by the IEEE in 2005 (the IEEE is the major organization of electrical and electronic engineers in the US). And also: http://www.nist.gov/public_affairs/practiceguides/surgesfnl.pdf - "NIST recommended practice guide: Surges Happen!: how to protect the appliances in your home" *published by the US National Institute of Standards and Technology in 2001 bud must deny what any protector does. From page 6 of his NIST citation: You cannot really suppress a surge altogether, nor "arrest" it. What these protective devices do is neither suppress nor arrest a surge, but simply divert it to ground, where it can do no harm. bud is paid to promote protectors with the necessary earth ground connection. bud must say anything to promote plug-in protectors even though none will even claim such protection. Not one. In fact, bud's own citation Page 42 Figure 8 shos what happens when a protector is too close to electronics and too far from earth ground. A surge is earthed 8000 volts destrutively through an adjacent TV. bud will say anything, including the usual insults, to protect massive profit margins. Even post half facts. bud even forgets the damage created by plug-in (point of use) protectors as defined in Martzloff's 1994 IEEE papaer: Conclusion: 1) Quantitative measurements in the Upside-Down house clearly show objectionable difference in reference voltages. These occur even when or perhaps because, surge protective devices are present at the point of connection of appliances. Why do telcos not use any product that bud promotes? For 100 years, the effective protectors always required a short conneciton to earth. According to bud, surge energy magically disappears inside a plug-in protector. IEEE papers (including those cited by bud) say otherwise. Either surge energy gets dissipated harmlessly in earth OR it is dissipated destrutively inside appliances. bud's Page 42 Figure 8 shows that. Martzloff says that. Even page 17 of bud's NIST paper says again why plug-in protectors do not protect from surges that are typically destructive: A very important point to keep in mind is that your surge protector will work by diverting the surges to ground. The best surge protection in the world can be useless if grounding is not done properly. bud is paid to promote ineffective and obscenely overprices protectors. Even telcos all over the world (that typically suffer 100 surges during every thunderstorm) do not use anything recommended by bud. Telcos use 'whole house' protector and even better earthing. Others have spend massively on plug-in protectors and still suffered damage. We install only one 'whole house' protector so that better earthing means nothing is damaged. When was phone service lost everywhere in your town as they spend four days replacing their surge damaged computer? Never happens because 'whole house' protectors are connected as short as possible to better earthing. A protector is only as effective as its earth ground. So where is that spec on any bud protector that even claims protection? bud says his plug-in protector are complete protection systems. bud refuses to provide even one protector spec for one simple reason. No plug-in (point of use) protector claims to protect from the typically destuctive surge. Of course not. No earth ground means no effective protection. Defined is the earthing so essential is that a protection can do what? NIST (and literally every other responsible source) says what is necessary to make a protector effective: your surge protector will work by diverting the surges to ground. The best surge protection in the world can be useless if grounding is not done properly. How does bud's plug-in protector divert to ground? It doesn't. It does not even claim to protect from such surges. It will somehow stop and absorb what three miles of sky cannot? bud makes that claim. So bud will post more insults; keep others confused. When selling a $3 power strip with some ten cent parts for $25 or $150, then even I would sell you such devices. Profit margins are just too excessive for anyone to be honest. But I don't post insults selling a scam. Nobody uses bud's solution where damage is unacceptable. Every where that even direct lightning strikes must never cause damage, better earthing and 'whole house' protectors are used. What does the US Air Force demand for surge protection? In Training manuals, all protectors must be properly earthed 'whole house' protectors. Plug-in protectors do not provide protection from typically destructive surges due to no earth ground. As the Air Force says: Install the surge protection as soon as practical where the conductor enters the interior of the facility. Devices commonly used for this include metal oxide varistors, gas tube arresters, and transzorbs. I need not post insults as bud always does everywhere. I am not selling a scam. Every facility that must never have surge damage significantly upgrades earthing AND installs 'whole house' protectors. Earth is where direct lightning strikes are harmlessly dissipated in earth. No earth ground means what to harmlessly absorb that surge? Even surges created by falling high voltage wires on local distribution seek earth. A protector is only as effective as its earth ground. A device that diverts surge energy harmlessly into earth. A solution so well proven as to always be required in every munitions dump. One does not even know if his earthing exists. If an earthing wire crosses the building to connect to a water pipe, then earthing all but does not exist. Critical to effective surge protection is a short (ie 'less than 10 foot') connection to an earth ground for every incoming utility. A protector (ie one installed for free on everyone's phone line) is only as effective as its earth ground. Earth is the protection. . No insults are required to define science and expose salesmen myths. Even bud's citations say why plug-in protectors are ineffective. Where is one plug-in protector spec that claims protection? No protection claims exist for an obvious reason - no dedicated earthing connection means no effective protection. bud cannot even provide one spec - and he works for them. Which is why telcos everywhere in the world do not use bud's protectors. |
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On Apr 30, 3:10*pm, westom wrote:
Is it possible to ask a simple question on AHR about surge protection and/or grounding without... ....never mind. I know the answer to THAT question. nate (you'd think I'd learn. But I seriously would like to know if there's any way to "verify" that a building ground is good without digging up the ground rods.) |
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, N8N wrote: On Apr 30, 3:10*pm, westom wrote: Is it possible to ask a simple question on AHR about surge protection and/or grounding without... ...never mind. I know the answer to THAT question. I think Bud and Tom actually believe that sooner or later, after perhaps 17000 discussions, one of them will actually win the debate. |
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On Apr 30, 5:57*pm, Smitty Two wrote:
I think Bud and Tom actually believe that sooner or later, after perhaps 17000 discussions, one of them will actually win the debate. Bud follows me everywhere cutting and pasting the same accusations and half truth for one simple reason. It is his job. The only people who win will do what every reliable radio and TV station, telephone switching center (CO), military bases, maritime nuclear hardened radio stations, and even munitions dumps have been doing for over 100 years. In every case, the protector does not provide protection. But a 'magic' box with that massive profit margin somehow gets promoted. After all, will it stop and absorb what three miles of sky could not? Of course not. That is why high reliablity factilities do not waste money on plug-in protectors. Nobody can *sell* earth ground. So sales brochures don't mention it. But industry benchmark in surge protection ... even their application notes define the only compoent always required for surge protection: single point earth ground http://www.polyphaser.com/technical_notes.aspx As others have noted, earthing is essential to surge protection. As IEEE states in standards, this is not 100% protection. Spend tens or 100 times more money for the plug-in protectors for the additional 0.5% protection? Even IEEE Standards define how effective properly earthed protection really is: 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 ... If you learn this, then bud's profit margins will dimish. However, if you learn this, then you will buy protectors from far more resonsible companies such as Square D, General Electric, Cutler- Hammer, Leviton, Keison, Polyphaser, Intermatic, and so many others. Buy protectors that costs about $1 per protected appliance - not the $150 protector recommended by bud. |
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On Apr 30, 4:23*pm, wrote:
It isn't magic, it is just energy that gets converted to heat in the MOV., That works until the MOV burns up. That is why MOVs are rated by the amount of energy they can convert and how fast. Let's view those numbers. The protector is rated for how many hundred joules? It will somehow absorb the hundreds of thousands of joules in a surge? That is what bud promotes. Meanwhile, even bud's citation (page 6) says what the effective protector does. It does not absorb surge energy: What these protective devices do is neither suppress nor arrest a surge, but simply divert it to ground, where it can do no harm. Not absorb or stop a surge. Instead, MOVs divert (connect, bond, conduct, shunt) energy harmlessly into earth. No wonder every facility that has no surge damage also does better earthing. NIST then states on page 17: The best surge protection in the world can be useless if grounding is not done properly. Why? Earth ground is the protection. Or as Dr Ken Schneider (?) says: Conceptually, lightning protection devices are switches to ground. Once a threatening surge is detected, a lightning protection device grounds the incoming signal connection point of the equipment being protected. Thus, redirecting the threatening surge on a path-of-least resistance (impedance) to ground where it is absorbed. Where are thousands of joules absorbed? In a protector rated for hundreds of joules? In a protector rated to dissipate at most, tens of watts? Of course not. Surge protection means massive surge energy gets connected and dissipated harmlessly in earth - not inside the protector. A surge that does not enter the building will not overwhelm protection inside every appliance. Just another reason why telcos use 'whole house' protectors, better earthing, and no plug-in protectors. Just another reason why every wire that enters every CO first goes underground, connects to well earthed 'whole house' protectors, and typically locate the switching computers up to 50 meters separated from the protectors. All this so that any surge is harmlessly dissipated in earth - what provides protection. Let's view those numbers. Notice no plug-in protector even claims to provide that protection. bud must say anything to avoid that fact and essential purpose of earthing: to harmlessly absorb surges energy. A protector (a diverting device) is only as effective as its earth ground. Hunderd joule MOVs do not work by absorbing hundreds of thousands of joules from surges. Which is what a protector must do to claim surge protection is its numeric specifications. Solution to household surge damage starts with inspecting earth ground for the secondary protection system. And yes, these is also another (primary) protection system. |
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N8N posted for all of us...
On Apr 30, 3:10*pm, westom wrote: Is it possible to ask a simple question on AHR about surge protection and/or grounding without... ...never mind. I know the answer to THAT question. nate (you'd think I'd learn. But I seriously would like to know if there's any way to "verify" that a building ground is good without digging up the ground rods.) I believe a megger can be used. -- Tekkie Don't bother to thank me, I do this as a public service. |
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westom wrote:
On Apr 30, 11:38 am, bud-- wrote: The best information on surges and surge protection I have seen is at: http://www.mikeholt.com/files/PDF/LightningGuide_FINALpublishedversion_May051.pdf - "How to protect your house and its contents from lightning: IEEE guide for surge protection of equipment connected to AC power and communication circuits" published by the IEEE in 2005 (the IEEE is the major organization of electrical and electronic engineers in the US). And also: http://www.nist.gov/public_affairs/practiceguides/surgesfnl.pdf - "NIST recommended practice guide: Surges Happen!: how to protect the appliances in your home" published by the US National Institute of Standards and Technology in 2001 bud must deny what any protector does. From page 6 of his NIST citation: What does the NIST guide really say about plug-in suppressors? They are "the easiest solution". And "one effective solution is to have the consumer install" a multiport plug-in suppressor. bud is paid to promote protectors One of w's favorite lies. Wouldn't be necessary if poor w had valid technical arguments. In fact, bud's own citation Page 42 Figure 8 shos what happens when a protector is too close to electronics and too far from earth ground. A surge is earthed 8000 volts destrutively through an adjacent TV. Another of w's favorite lies. In the IEEE example: - A plug-in suppressor protects the TV connected to it. - "To protect TV2, a second multiport protector located at TV2 is required." - In the example a surge comes in on a cable service with the ground wire from cable entry ground block to the ground at the power service that is far too long. In that case the IEEE guide says "the only effective way of protecting the equipment is to use a multiport [plug-in] protector." - w_'s favored power service suppressor would provide absolutely NO protection. It is simply a lie that the plug-in suppressor in the IEEE example damages the second TV. bud even forgets the damage created by plug-in (point of use) protectors as defined in Martzloff's 1994 IEEE papaer: w forgets to mention that Martzloff said in the same document: "Mitigation of the threat can take many forms. One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]." On alt.engineering.electrical, w similarly misconstrued the views of Arshad Mansoor, another upside down house author, and provoked a response from an electrical engineer: "I found it particularly funny that he mentioned a paper by Dr. Mansoor. I can assure you that he supports the use of surge equalization type [multiport] plug-in protectors. Heck, he just sits down the hall from me. LOL." In 2001 Martzloff wrote the NIST guide that also says plug-in suppressors are effective. bud refuses to provide even one protector spec for one simple reason. No plug-in (point of use) protector claims to protect from the typically destuctive surge. Another of w's favorite lies. Specs have been provided often, such as about a year ago in this newsgroup: http://tinyurl.com/6alnza Specs are just ignored by w. It will somehow stop and absorb what three miles of sky cannot? bud makes that claim. w is fond of inventing what others say. Poor w's religious blinders prevent him from reading the explanation in the IEEE guide of how plug-in suppressors work. Repeating: Plug-in suppressors do not work primarily by earthing (or stopping or absorbing). The guide explains earthing occurs elsewhere. I need not post insults as bud always does everywhere. Poor sensitive w is insulted by reality. A protector is only as effective as its earth ground. w's religious mantra protects him from conflicting thoughts (aka reality). Still missing - a link to anyone who agrees with w that plug-in suppressors do NOT work. Still never answered - simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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westom wrote:
On Apr 30, 5:57 pm, Smitty Two wrote: I think Bud and Tom actually believe that sooner or later, after perhaps 17000 discussions, one of them will actually win the debate. It is now 36,371. Have you ever "won" a discussion with a Jehovah's Witness? However, if you learn this, then you will buy protectors from far more resonsible companies such as Square D, General Electric, Cutler- Hammer, Leviton, Keison, Polyphaser, Intermatic, and so many others. As trader4 has shown, all of these "responsible" companies except SquareD and Polyphaser make plug-in suppressors. Must be they aren't "responsible" at all. For its "best" service panel suppressor SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use." As always - no link to anyone who agrees with w that plug-in suppressors do NOT work. Still never answered - simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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westom wrote:
On Apr 30, 4:23 pm, wrote: It isn't magic, it is just energy that gets converted to heat in the MOV., That works until the MOV burns up. That is why MOVs are rated by the amount of energy they can convert and how fast. Let's view those numbers. The protector is rated for how many hundred joules? It will somehow absorb the hundreds of thousands of joules in a surge? That is what bud promotes. w is not able to understand simple physics. Francois Martzloff was the NIST guru on surges, wrote the NIST guide, and has many published technical papers. One of them looks at a MOV on a branch circuit of 10-50 meters with surges to the power service of 2,000-10,000A (the maximum with any reasonable probability of occurring, at least for a house). Surprisingly, the maximum energy dissipated was 35 Joules. In 13 of 15 cases it was 1 Joule or less. That is because at about 6,0000V there is arc-over from service hot bus to the enclosure. After the arc is established the voltage is hundreds of volts. In US services, the enclosure is connected to the equipment ground wires, the neutral wires and the earthing system. Arc-over dumped most of the incoming energy to earth. In addition, the impedance of the branch circuit wiring greatly limits the current that can reach the MOV. Surges are very short duration, so the inductance of the wire is much more important than the resistance. The higher energies were for a 10M branch circuit and, even more surprising, the lower current surges below 5,000A. Contrary to intuition, at all branch circuit lengths the energy dissipation at the MOV was lower as the surge current went up. That was because the MOV acted to clamp the voltage at the service panel. With the short branch circuit and lowest surge currents, the MOV prevented arc-over. Higher current surges forced the voltage up faster, causing arc-over faster and more energy was dumped to earth. MOVs in both service panels and plug-in suppressors do not protect by absorbing energy. But they absorb some energy in the process of protecting. Also, stated Joule ratings are for a single event - one surge that puts the MOV at its defined end of life (but still functional). If the energy hits are much smaller, the cumulative energy rating is much higher. For example a MOV might have a (single event) rating of 1,000J. If the individual hits are 14J the cumulative energy rating might be 13,000J. High ratings give a much longer life than you might expect. For the reasons above, a plug-in suppressor with high ratings is not likely to ever fail. That is one reason some manufacturers can provide protected equipment warranties. Notice no plug-in protector even claims to provide that protection. Complete nonsense. Some manufacturers even have protected equipment warranties. Still missing - a link to anyone who agrees with w that plug-in suppressors do NOT work. Still never answered - simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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Tekkie® wrote:
N8N posted for all of us... On Apr 30, 3:10 pm, westom wrote: Is it possible to ask a simple question on AHR about surge protection and/or grounding without... ...never mind. I know the answer to THAT question. nate (you'd think I'd learn. But I seriously would like to know if there's any way to "verify" that a building ground is good without digging up the ground rods.) Such a simple question. You would think there would be a simple answer. Easiest is probably follow the earthing conductor to find what electrodes are used (as John suggested). A metal water service pipe is an excellent electrode [but can invoke another of w's delusions]. In older buildings the other electrode you may find is one or more ground rods. Rods are not a particularly good electrode. It is probably easier to add a rod than determine if an old rod is still good. Measuring resistance to earth can be done with a 3 point tester - not easy. There is a simple clamp on tester. Not likely you can borrow one. A contractor may have one. An old method I have read about is to disconnect the earthing conductor from the service and connect it to the hot through a 6.25A fuse [a standard size]. If the fuse blows fast the resistance is 20 ohms or less. I might try this but I'm not sure I would recommend it - there are a number of hazards including just disconnecting the wire. The earthing wire must not contact *anything* but the electrode. (This also depends on the earthing of the utility transformer and can result in some earthing current through other customer's electrodes.) Crossed power lines are rare and it is difficult to provide protection. As I noted elsewhere, much of the protection from surges is actually having the power and phone and cable wires stay at the same potential (although elevated) during a surge event. I believe a megger can be used. A megger is to measure very high resistances (megohms, like insulation). -- bud-- |
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On May 1, 12:19*pm, bud-- wrote:
As trader4 has shown, all of these "responsible" companies except SquareD and Polyphaser make plug-in suppressors. Must be they aren't "responsible" at all. Even I would sell someone a plug-in protector. Profits are that massive - obscene. Of course, I too must claim no protection from typically destructive surges.. So where is that bud numeric spec that claims his plug-in protectors provides any protection. He still cannot find even one. He pretends the question has not been asked 1000 times - and never answered. Meanwhile only companies with responsible names make protectors that actually earth surge energy. Nothing from APC, Tripplite, Belkin, or Monster Cable will do that - or even claims to. bud cannot post even one manufacturer spec that claims protection. Why? Plug-in protectors don't claim that protection. When too close to electronics and too far from earth ground, that few hundred joules must absorb hundreds of thousands of joules? So it either does nothing OR the surge is earthed destructively by some other appliance, OR one 'whole house' protector means the power strip protector never sees any significant surge energy. Why spend money on so many plug-in protectors when one 'whole house' protector does so much? Why do high reliability facilities use 'whole house' protectors and earthing. Why do so many factilities only use earthed protectors - not plug-in protectors? Because they need protection. And because they have no interest in enriching bud and his peers. Protection is only as effective as its earth ground. That also means a short (low impedance - not just low resistance) connection to earth. Polyphaser (an industry benchmark) even makes a protector that has no connection to earth. To obtain low impedance, the Polyphaser protector mounts ON earth ground - zero feet to earth. No matter how sales promoters spin it, protectors are only as effective as their earthing. No wonder earthing is always done carefully in every facility that has no surge damage. High reliability facilities upgrade their earthing and Install the surge protection as soon as practical where the conductor enters the interior of the facility. - US Air Force OR bonding all services together with a low impedance path to earth ground. - Schmidt Consulting OR In actual practice, lightning protection is achieve by the process of interception of lightning produced surges, diverting them to ground - IEEE Std 141 (Red Book) OR Conceptually, lightning protection devices are switches to ground. Dr Kenneth Schneider OR A properly installed lightning protection system intercepts the lightning bolt between cloud and earth and harmlessly conducts it to ground without damage. - IPC Company OR Of course you *must* have a single point ground system that eliminates all ground loops. And you must present a low *impedance* path for the energy to go. That's most generally a low *inductance* path rather than just a low ohm DC path. - Gary Coffman Station Engineer WXIA-TV OR The basic scenario is to install a Single Point Ground System that is installed at the building entry. It shunts everything to ground before it goes in the building. If you can keep it outside, then you don't really have to do much inside. - many discussions on surge protection at http://lists.contesting.com/_towertalk/ OR 1) Capture lightning strikes at a preferred point(s) 2) Conduct the energy safely to ground 3) Dissipate energy into ground 4) Equipotentially bond all grounds - "Need for Coordinated Protection" from Erico.com OR First and foremost, there should be only one ground system. Second, the individual l/O protectors need to be co-located on the same electrical ground plane. This means establishing a single point ground system within the equipment building. - Polyphaser application note OR Lightning surges cannot be stopped, but they can be diverted. ... These should divert the power of the surge by providing a path to ground for the surge energy. - Sun Microsystem planning guide for server rooms. OR The purpose of the ground connection is to take the energy arriving on the antenna feed line cables and control lines (and to a lesser extent on the power and telephone lines) and give it a path back to the earth, our energy sink. The impedance of the ground connection should be low so the energy prefers this path and is dispersed harmlessly. - ARRL's QST magazine July 2002 on ""Lightning Protection for the Amateur Radio Station" OR Without proper bonding, all other elements of the LPs are useless. Bonding of all metallic conductors in a dispatch facility assures everything is at equal potential. ... This eliminates the unequal voltages in separate sensitive signal and data systems. Bonding should connect all conductors to the same "Mother Earth." - National Lightning Safety Institute OR Those who say "nothing will withstand a direct lightning strike" are very misinformed. My towers take direct lightning hits most every big storm. .... With NO damage! Those old wives tales of damage are for the most part over 50 year old tales of woe from improperly grounded/ protected stations. - Charles Bushell - KC8VWM and numerous others on eham.net OR Surge protection devices should ideally operate instantaneously to divert a surge current to ground with no residual common-mode voltage presented at the equipment terminals. - Atlantic Scientific OR Failure to observe any part of this grounding requirement may result in hazardous potential being developed between the telephone (data) equipment and other grounded items - IEEE Standard 1100 (Emerald Book) OR In one memorable instance at KROA, lightning ignored the existing grounding system and instead followed the coaxial cable directly into the transmitter room. ... the incident was a strong indication that the grounding system should be improved. - "Proper Copper Grounding Systems Stops Lightning Damage at Nebraska FM Station" OR A surge protection device (SPD), also known as a transient voltage surge suppressor (TVSS), is designed to divert high-current surges to ground and bypass your equipment, thereby limiting the voltage that is impressed on the equipment. For this reason, it is critical that your facility have a good, low-resistance grounding system, with a single ground reference point to which the grounds of all building systems are connected. Without a proper grounding system, there is no way to protect against surges. - "Guidelines For Providing Surge Protection at Commercial, Institutional, and Industrial Facilities" OR Lightning cannot be prevented; it can only be intercepted or diverted to a path which will, if well designed and constructed, not result in damage. - IEEE Standard 142 (Green Book) OR Surge protection takes on many forms, but always involves the following components: Grounding bonding and surge protectors. ... Grounding is required to provide the surge protector with a path to dump the excess energy to earth. A proper ground system is a mandatory requirement of surge protection. Without a proper ground, a surge protector has no way to disburse the excess energy and will fail to protect downstream equipment. - FAQ from Southwest Bell on surge protection OR TVSS devices showed to reduce the peak voltage of the transient surges ... This was accomplished because the TVSS ... thus provided a low impedance path to ground for the transient surge. geindustrial.com white paper "The Influence Of Cable Connections on TVSS Performance" OR The breakdown of the gap forms a very low impedance path to ground thus diverting the surge away from the equipment. Littelfuse application note "Surge Suppression Technologies for AC Mains Compared" OR The primary protection is intended to divert fault currents away from the protected equipment and into a reliable earth ground. - Legerity App note "Overvoltage Protection of Solid-State Subscriber Loop Circuits" OR Providing a flow path for the lightning current is central to effective lightning protection. ... Lightning is essentially a current impulse which is trying to return to earth. - EE Times Apr 2008 "Protecting electrical devices from lightning transients" OR All work by reacting to the excess voltage caused by the surge and by changing electrical state to conduct the surge energy safely to earth. If correctly specified, they will reduce the surge voltage to below the withstand voltage of the connected equipment. - Bowthorpe's discussion of BS6651 - a British standard for surge protection. How does his protector stop what three miles of sky could not? How does he explain his protector earthing a surge 8000 volts destructively through an adjacent TV? He pretends we engineers also did not see that damage. So where is that manufacturer spec that claims all this protection? Even bud cannot find one? But we should believe the sales promoter? We earth one 'whole house' protector for the 99.5% protection. Some may spend massively on power strip protectors if another 0.5% protection is required. Just more numbers from an IEEE Standard that bud must ignore. Profits are at risk. |
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On May 1, 12:23 pm, bud-- wrote:
Surprisingly, the maximum energy dissipated was 35 Joules. In 13 of 15 cases it was 1 Joule or less. That is because at about 6,0000V there is arc-over from service hot bus to the enclosure. After the arc is established the voltage is hundreds of volts. In US services, the enclosure is connected to the equipment ground wires, the neutral wires and the earthing system. Arc-over dumped most of the incoming energy to earth. So the 100 plug-in protectors saw no surge energy - nothing that could harm appliances - when one 'whole house' protector was properly earthed. Arcing or diverting surge energy harmlessly in earth means no energy for the protector to absorb - no appliance damage. Why buy fifty $25 or $150 per appliance protectors when protection is made irrelevant by one 'whole house' protector? One 'whole house' protectors selling for less than $50 in Lowes makes maybe $50,000 in plug-in protectors irrelevant? Whose profit margins are being protected? Why do bud's plug-in protectors see no energy? If that energy is properly diverted to earth before entering the building, then no surge exists to overwhelm protection already inside every appliance. One 'whole house' protector means no plug-in protectors are needed AND eliminates reasons for these scary pictures from fire departments, fire marshals, etc: http://www.hanford.gov/rl/?page=556&parent=554 http://www.westwhitelandfire.com/Art...Protectors.pdf http://www.ddxg.net/old/surge_protectors.htm http://www.zerosurge.com/HTML/movs.html http://tinyurl.com/3x73ol http://www3.cw56.com/news/articles/local/BO63312/ http://www.nmsu.edu/~safety/news/les...tectorfire.htm Scary pictures - just another reason for earthing destructive surges harmlessly where? Outside the building. . Keep that threat away from papers on a desk or the carpet. No wonder telcos don't waste money on plug-in protectors. Just another reason for earthing one 'whole house' protector. It costs how much in Lowes? So where is that 'plug-in protector' manufacturer spec that claims protection? Maybe I overlooked it? A protector is only as effective as its earth ground. |
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westom wrote:
On May 1, 12:19 pm, bud-- wrote: As trader4 has shown, all of these "responsible" companies except SquareD and Polyphaser make plug-in suppressors. Must be they aren't "responsible" at all. Even I would sell someone a plug-in protector. So now w says his "responsible companies" aren't responsible at all. But what about SquareD. They don't sell plug-in suppressors but say "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use". Of course, I too must claim no protection from typically destructive surges. Of course the "responsible companies" say their plug-in suppressors are effective - trader4 showed that in a previous thread. So where is that bud numeric spec that claims his plug-in protectors provides any protection. He still cannot find even one. He pretends the question has not been asked 1000 times - and never answered. The lie repeated. Specs have been provided often, including in this thread. They are always ignored - as they have been in this thread. bud cannot post even one manufacturer spec that claims protection. The lie repeated again. When too close to electronics and too far from earth ground, that few hundred joules must absorb hundreds of thousands of joules? Poor w ignores the results from Martzloff, just like he ignores everything else that conflicts with his religious belief in earthing. w is the poster child for cognitive dissonance. How does his protector stop what three miles of sky could not? It is willful stupidity. w refuses to understand the explanation in the IEEE guide. Plug-in suppressors work primarily by clamping the voltage on all wires to the ground at the suppressor. And w refuses to understand the results from Martzloff. How does he explain his protector earthing a surge 8000 volts destructively through an adjacent TV? Another lie repeated. He pretends we engineers also did not see that damage. Any alleged engineers are not able to RTFM. Any competent manufacturer will say that all wires to a set of protected equipment must go through a plug-in suppressor. So where is that manufacturer spec that claims all this protection? Even bud cannot find one? The lie repeated for the 3rd time. But still never seen - a source that agrees with w that plug-in suppressors do NOT work. And still never answered - simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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westom wrote:
On May 1, 12:23 pm, bud-- wrote: Surprisingly, the maximum energy dissipated was 35 Joules. In 13 of 15 cases it was 1 Joule or less. That is because at about 6,0000V there is arc-over from service hot bus to the enclosure. After the arc is established the voltage is hundreds of volts. In US services, the enclosure is connected to the equipment ground wires, the neutral wires and the earthing system. Arc-over dumped most of the incoming energy to earth. So the 100 plug-in protectors saw no surge energy - nothing that could harm appliances - when one 'whole house' protector was properly earthed. There were not 100 suppressors and there was no service panel suppressor. w is hallucinating again. Arcing or diverting surge energy harmlessly in earth means no energy for the protector to absorb - no appliance damage. There is voltage and energy that can damage connected equipment. The NIST guide suggests that the major cause of damage to electronics is high voltage between power and signal wires. That is a separate issue from surges on power wires. Why buy fifty $25 or $150 per appliance protectors when protection is made irrelevant by one 'whole house' protector? Repeating from the NIST guide: "Q - Will a surge protector installed at the service entrance be sufficient for the whole house? A - There are two answers to than question: Yes for one-link appliances [electronic equipment], No for two-link appliances [equipment connected to power AND phone or cable or....]. Since most homes today have some kind of two-link appliances, the prudent answer to the question would be NO - but that does not mean that a surge protector installed at the service entrance is useless." Service panel suppressors do not prevent high voltages from developing between power and signal wires. If that energy is properly diverted to earth before entering the building, then no surge exists to overwhelm protection already inside every appliance. Provide a source that says protection is "inside every appliance". Protection, if it exists, is typically MOVs. How can MOVs protect when there is no short connection to an earth ground? No earth ground means no protection. One 'whole house' protector means no plug-in protectors are needed AND eliminates reasons for these scary pictures from fire departments, fire marshals, etc: http://www.hanford.gov/rl/?page=556&parent=554 w refuses to understand his own hanford link. It is about "some older model" power strips and says overheating was fixed with a revision to UL1449 that required thermal disconnects. That was 1998. There is no reason to believe, from any of these links, that there is a problem with suppressors produced under the UL standard that has been in effect since 1998. None of these links even say a damaged suppressor had a UL label. So where is that 'plug-in protector' manufacturer spec that claims protection? Maybe I overlooked it? w always overlooks it. His religious blinders prevent him from seeing anything that conflicts with his religious belief in earthing. A protector is only as effective as its earth ground. And the religious belief in earthing. Why aren't airplanes crashing every day. Or do they drag an earthing chain? Still no source that agrees with w that plug-in suppressors do NOT work. And still no answers to simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? - Where is a source that says protection is “inside every appliance”? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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On May 2, 4:10*am, bud-- wrote:
westom wrote: On May 1, 12:19 pm, bud-- wrote: As trader4 has shown, all of these "responsible" companies except SquareD and Polyphaser make plug-in suppressors. Must be they aren't "responsible" at all. * Even I would sell someone a plug-in protector. So now *w says his "responsible companies" aren't responsible at all. LOL. And now we have Tom saying he'd actually sell someone a product that he not only says is totally ineffective, but that he claims actually CAUSES damage. At least we know a little more about his ethics. But what about SquareD. They don't sell plug-in suppressors but say "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use". Of course, I too must claim no protection from typically destructive surges. Of course the "responsible companies" say their plug-in suppressors are effective - trader4 showed that in a previous thread. And still never answered - simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says *"electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? And I'm still waiting for an answer to my simple question to Tom posted months ago: If plug-ins are incapable of any protection because they have no direct earth ground, how is it that the same components used in plug- in surge suppressors are typically used to provide surge protection inside appliances and electronics? Tom himself claims that protection inside appliances IS EFFECTIVE. So, how can that be? Is there a mythical direct earth ground inside these appliances? Also, I thought another excellent question raised by someone with considerable insight a few months ago, deserves an answer: If surge protection is impossible without a direct earth ground, how is it that aircraft are protected from surges from nearby lightning or direct strikes? |
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On May 2, 8:42 am, wrote:
If plug-ins are incapable of any protection because they have no direct earth ground, how is it that the same components used in plug- in surge suppressors are typically used to provide surge protection inside appliances and electronics? Again I answer - and you will ignore it. Those MOV once were in appliances. No longer. Anything that MOVs would do inside the Apple II and other appliances was done better and cheaper by other internal designs. MOV is a diverting device. It does not stop and absorb energy as bud claims. 1) Without a short connection to divert energy into, it may even contribute to electronics damage - as we engineers even proved. We traced an MOV earthed a surge destructively through a network of powered off computers. MOV gave the surge more destructive paths through computers. Then we learned this stuff by also doing it. 2) bud's IEEE citation Page 42 Figure 8 shows what we also learned. 3) Martzloff's IEEE paper also cautions about objectionable voltages because the protector is too close to appliances and too far from earth ground. Numerous sources say the same thing. MOVs protectors are not effective when disconnected from protection (no wonder bud fears to discuss earth ground). MOV once were inside appliances - and appliances were still damaged. Then MOVs were moved to be close to earth ground. Damage stopped with MOVs located as required even by telcos 100 years ago. But then I am only posting well understood science. You saw an MOV inside an appliance and then assumed all appliances have them? As the NIST says, MOVs are diverting devices. Divert massive surge energy harmlessly into earth. To make both MOVs and wire even better, we increase them so that both wire and MOV absorb even less energy. How to get a protector to absorb less energy and divert even more energy harmlessly into earth? Increase its joules. A protector with more joules will absorb less energy. Of course. Anyone can see that using numbers from datasheets. That is what better protectors do. Not absorb surges as a plug-in protector (or MOVs inside an appliance) must do. Protectors are made even better when connected shorter to an even better earth ground. Only ineffective protectors make that ‘stop and absorb’ claim - and only in sales brochures. Where is that manufacturer spec that actually claims protection? Appliance manufactures stopping installing MOVs inside appliances long ago. Others even confuse that MOV with another device - inrush current limiter – since they look similar. All appliances contain internal protection that is far better than what an internal MOV might do. Why do we install and earth the 'whole house' protector? So that protection inside every appliance is not overwhelmed. If ten cent MOVs inside an appliance are so effective, then why is anyone spending $25 or $150 on plug-in protectors? Clearly the superior solution is to install MOVs inside the appliance and save $24 or $149. But then the public would not be scammed by those massive profit margins. They myth must live on to save bud’s job. If MOVs are inside appliances, then nobody needs a plug-in protector. Just another reason why plug-in protectors are so ineffective. Just answer question I keep asking and you pretend it was never asked. We install a protector for no damage even during a direct lightning strike. Yes, that means a direct lightning strike and even a protector is not damaged. No earth ground means no effective protection. Even every bud citation say shows why. A protector is only as effective as its earth ground which is why the OP must inspect and probably upgrade his earthing. On Page 42 Figure 8 – why even install the plug-in protector? Why was the TV 8000 volts destroyed if MOVs are routinely installed in TVs? Because the MOVs are not there. Because the MOVs in that power strip protector did the exact same thing that MOV would do inside a TV. Every location that can never have damage, instead, locates those MOVs to be as close as possible to earth ground. That distance between the MOV and electronics means even better protection. So where is that plug-in (MOV) protector spec that claims protection? Cannot be provided? Or course not. Plug-in protector manufacturers will not claim protection. But selling the scam sure is profitable. |
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On May 1, 12:15 pm, bud-- wrote:
For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. Cut and paste the same half truths. Post insults. And still no manufacturer spec that even claims that protection. No wonder telcos all over the world waste no money on bud's products. Page 42 Figure 8 - a surge protector was so effective as to earth that surge 8000 volts through the adjacent TV? bud calls that protection! He pretends Page 42 Figure 8 does not exist. And pretends that Martzloff does not define the same damage in his 1994 IEEE paper: 1) Quantitative measurements in the Upside-Down house clearly show objectionable difference in reference voltages. These occur even when or perhaps because, surge protective devices are present at the point of connection of appliances. bud will repost the same half truths repeatedly because sale promoters are taught to always post the last word. bud must keep posting. With profits so obscene, even I would do what bud does. bud will not answer the OP's problem. Plug-in protectors don't need earth ground to magically stop what three miles of sky could not. The OP should start an examination of the earth ground system or upgrade earth ground to meet and exceed post 1990 code requirements (details posted previously). If the existing system cannot be inspected, then best is to install a new earthing system so that all incoming utilities make the same short (ie 'less than 10 foot') connection to that electrode system. bud's protectors don't need no ground. Their few hundred joules will magically make hundreds of thousands of joules surges disappear. Or his new claim. The protector only absorbs one or two joules. Funny. One or two joules means protection inside every appliance makes that surge irrelevant. Why spend so much money on a protector when one or two joules cannot harm anything? Earth ground is essential so that surge protectors can do what the NIST, IEEE , telcos, US Air Force, munitions dumps, etc require - a short connection to divert surge energy harmlessly into earth. How curious. That is what every telco does everywhere in the world to not have damage. Telcos don't waste money on what bud sells. After all, telcos first demand specifications. bud cannot provide any specifications. Where are bud's specs that claim that protection? .. A protector is only as effective as its earth ground ... as was true 100 years ago and is true anywhere that surge damage cannot occur. bud claims his plug-in protectors magically stop what three miles of sky could not. A sales promoter will say anything to close the deal. |
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westom wrote:
On May 2, 8:42 am, wrote: If plug-ins are incapable of any protection because they have no direct earth ground, how is it that the same components used in plug- in surge suppressors are typically used to provide surge protection inside appliances and electronics? Again I answer - and you will ignore it. Those MOV once were in appliances. No longer. Bullcrap. trader4 showed in a previous thread that MOVs are widely used as protection. w ignored it. As an example, a GFCI outlet I recently took apart had an MOV for protection. It connected only L-N. Still not answered - how do the MOVs that ARE in equipment provide protection when they do not have a good earth ground and "no earth ground means no effective protection". And still not answered - trader4's question "how is it that aircraft are protected from surges from nearby lightning or direct strikes"? MOV is a diverting device. MOVs are a clamping device. All they do is limit the voltage across their terminals. It does not stop and absorb energy as bud claims. Because the village idiot is unable to understand the simple explanation of how plug-in suppressors work that is in the IEEE guide and because the village idiot can't understand the explanation in a Martzloff technical paper, which I summarized the village idiot thinks plug-in suppressors work by stopping and absorbing. We traced an MOV earthed a surge destructively through a network of powered off computers. You were not smart enough to RTFM. What a surprise. Numerous sources say the same thing. MOVs protectors are not effective when disconnected from protection Numerous sources say the same thing - plug-in suppressors are effective. The IEEE. The NIST. Martzloff in numerous technical papers. Almost all of w's "responsible companies". Where is *any* source that says plug-in suppressors do NOT work? There are none. There is just w and his religious belief in earthing. As the NIST says The NIST says: Plug-in suppressors are "the easiest solution". And "one effective solution is to have the consumer install" a multiport plug-in suppressor. Only ineffective protectors make that ‘stop and absorb’ claim Only w makes a "stop and absorb" claim. So that protection inside every appliance is not overwhelmed. Still missing - a source that say protection is "inside every appliance". And missing - an explanation of the protection. No earth ground means no effective A protector is only as effective as its earth ground And the religious mantras that protect poor w from reality. Surprise - surprise - still no source that agrees with w that plug-in suppressors do NOT work. And still no answers to simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? - Where is a source that says protection is "inside every appliance"? - How do you protect airplanes from direct lightning strikes? Do they drag an earthing chain? Why can't you answer simple questions w??? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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westom wrote:
On May 1, 12:15 pm, bud-- wrote: For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. Cut and paste the same half truths. w believes that the IEEE and NIST guides are half truths. Post insults. w is insulted by the IEEE and NIST guides. And still no manufacturer spec that even claims that protection. The lie repeated. No wonder telcos all over the world waste no money on bud's products. You mean a telco switch? That is high amp? And hard wired? And that has thousands of phone wires that would have to go through a suppressor? And they aren't "my products". Page 42 Figure 8 - a surge protector was so effective as to earth that surge 8000 volts through the adjacent TV? Another lie repeated. And pretends that Martzloff does not define the same damage in his 1994 IEEE paper: Martzloff said: "Mitigation of the threat can take many forms. One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]." Poor w has to twist what sources really say to protect his religious belief in earthing. bud will repost the same half truths repeatedly w has repeated the lies above repeatedly. bud will not answer the OP's problem. The OPs problem was grounding outlets. I provided an answer. w has not. w dragged the thread into his religious crusade against plug-in suppressors. The OP should start an examination of the earth ground system The OP did not have a problem with the earthing of his power system. Their few hundred joules will magically make hundreds of thousands of joules surges disappear. The village idiot ignores Martzloff's technical paper, which I summarized. Just like he ignores everything that conflicts with his religious belief in earthing. Earth ground is essential Everyone is in favor of earthing. The question is whether plug-in suppressors are effective. Both the IEEE and the NIST say they are. A protector is only as effective as its earth ground Ho-hum - the religious belief in earthing. Ho-hum - still no source that agrees with w that plug-in suppressors do NOT work. Ho-hum - still no answers to simple questions: - Why do the only 2 examples of protection in the IEEE guide use plug-in suppressors? - Why does the NIST guide says plug-in suppressors are "the easiest solution"? - Why does the NIST guide say "One effective solution is to have the consumer install" a multiport plug-in suppressor? - How would a service panel suppressor provide any protection in the IEEE example, pdf page 42? - Why does the IEEE guide say for distant service points "the only effective way of protecting the equipment is to use a multiport [plug-in] protector"? - Why did Martzloff say in his paper "One solution. illustrated in this paper, is the insertion of a properly designed [multiport plug-in surge suppressor]"? - Why do your "responsible manufacturers" make plug-in suppressors? - Why does "responsible" manufacturer SquareD says "electronic equipment may need additional protection by installing plug-in [suppressors] at the point of use"? - Where is a source that says protection is "inside every appliance"? - How do you protect airplanes from direct lightning strikes? Do they drag an earthing chain? For real science read the IEEE and NIST guides. Both say plug-in suppressors are effective. -- bud-- |
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