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#1
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Cold water grounding
Hi all,
I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. |
#2
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Cold water grounding
Open your main service panel and look for large, possibly bare wires
attached to the neutral/ground buss, that are not connected to any cable and leave the panel as individual conductors. If they have insulation on them, it should be marked with green tape. Depending upon the size of your service, they could be #8,6, or 4, or larger for larger than 200 amp services. If you follow these wires, one should go to a ground rod(s) and the other clamped to the cold water pipe "coustanis" wrote in message ups.com... Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. |
#3
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Cold water grounding
coustanis wrote:
Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Likely the box has a independent ground to ground wires outside. There should also be a ground coming from the service and one going to any metal water pipes you have. Relying on water pipes to provide ground is no longer code. -- Joseph Meehan Dia 's Muire duit |
#4
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Cold water grounding
coustanis wrote:
Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. |
#5
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Cold water grounding
On Feb 9, 9:01 am, "HeyBub" wrote:
coustanis wrote: Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? I thought it was the other way around. What would electrify the water pipes to require this? I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. |
#6
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Cold water grounding
If your underground water supply pipes were copper, they would indeed be
grounding the electrical system, but in your situation, the system is grounded by the rods, and bonded to the internal piping to protect you in the event that an internal pipe contacted something live. If the piping wasn't bonded to the system, nothing would cause the circuit breaker to trip if this occurred "coustanis" wrote in message oups.com... On Feb 9, 9:01 am, "HeyBub" wrote: coustanis wrote: Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? I thought it was the other way around. What would electrify the water pipes to require this? I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. |
#7
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Cold water grounding
On Feb 9, 9:08 am, "coustanis" wrote:
On Feb 9, 9:01 am, "HeyBub" wrote: coustanis wrote: Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? I thought it was the other way around. What would electrify the water pipes to require this? Hopefully, nothing. But, there's always the possibility that, say, you'll drop your electric razor in the sink with the water running, etc - better to have the juice short to ground through the water pipe than through you. I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. Yup, if you have a big bare copper wire going back outside and then disappearing underground, you're probably OK. If not, you may want to consider driving some grounding rods. nate |
#8
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Cold water grounding
On Feb 9, 9:28 am, "N8N" wrote:
On Feb 9, 9:08 am, "coustanis" wrote: On Feb 9, 9:01 am, "HeyBub" wrote: coustanis wrote: Hi all, I think I have a problem. I was doing some stuff in my basement and I noticed that the ground wire from the service panel was strapped to a copper cold water pipe. The problem is that the copper pipe with the ground then is then attached to a CPVC pipe so the copper just ends. Is it the copper pipe itself that carries the grounding or is it the water inside the pipe that does it. I have this bad feeling that my service panel is not grounded. What do you think? To take it a step further, what method can I use to test the service panel to see if it is, in fact grounded? Thank you in advance. Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? I thought it was the other way around. What would electrify the water pipes to require this? Hopefully, nothing. But, there's always the possibility that, say, you'll drop your electric razor in the sink with the water running, etc - better to have the juice short to ground through the water pipe than through you. I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. Yup, if you have a big bare copper wire going back outside and then disappearing underground, you're probably OK. If not, you may want to consider driving some grounding rods. nate The pipes coming into the house from the well are indeed black plastic, not metal. There is so much goofy stuff going on with this house it could easily have been changed incorrectly before I bought it. I'll look for that ground. An ohm meter would be useful here when I find it to ensure connection. |
#9
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Cold water grounding
N8N wrote:
.... Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? I thought it was the other way around. What would electrify the water pipes to require this? Hopefully, nothing. But, there's always the possibility that, say, you'll drop your electric razor in the sink with the water running, etc - better to have the juice short to ground through the water pipe than through you. I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. Yup, if you have a big bare copper wire going back outside and then disappearing underground, you're probably OK. If not, you may want to consider driving some grounding rods. nate Where the heck are you coming from, and what's your background enabling you to make such a statement? A wet human body is MUCH MORE conductive than water! If you complete a path, it'll go through you much faster than into the pipes, or at least on its way to the pipes. Is there actually anything in writing to substantiate your comments that might shed more accurate light on this situation? I'm not familiar with grounding water pipe requirements for these reasons and would like more info if it's true. Heck, if it's true, I could rip out a few GFCIs, in fact. NOT! Pop` |
#10
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Cold water grounding
Pop` wrote:
Where the heck are you coming from, and what's your background enabling you to make such a statement? A wet human body is MUCH MORE conductive than water! If you complete a path, it'll go through you much faster than into the pipes, or at least on its way to the pipes. Is there actually anything in writing to substantiate your comments that might shed more accurate light on this situation? I'm not familiar with grounding water pipe requirements for these reasons and would like more info if it's true. Heck, if it's true, I could rip out a few GFCIs, in fact. NOT! Whatever. The water does taste better, though. |
#11
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Cold water grounding
On Feb 9, 12:22�pm, "Pop`" wrote:
N8N wrote: ... Re-think time. It is not the electrical service that is grounded through the water pipes, it is the water pipes that are grounded through the electrical service. Really? *I thought it was the other way around. *What would electrify the water pipes to require this? Hopefully, nothing. *But, there's always the possibility that, say, you'll drop your electric razor in the sink with the water running, etc - better to have the juice short to ground through the water pipe than through you. I'll try to follow the larger, bare wires from the buss and see if I can trace them to a proper ground. Hopefully they won't go hidden on me. Thanks folks. Yup, if you have a big bare copper wire going back outside and then disappearing underground, you're probably OK. *If not, you may want to consider driving some grounding rods. nate Where the heck are you coming from, and what's your background enabling you to make such a statement? *A wet human body is MUCH MORE conductive than water! *If you complete a path, it'll go through you much faster than into the pipes, or at least on its way to the pipes. * Is there actually anything in writing to substantiate your comments that might shed more accurate light on this situation? *I'm not familiar with grounding water pipe requirements for these reasons and would like more info if it's true. *Heck, if it's true, I could rip out a few GFCIs, in fact. *NOT! Pop`- Hide quoted text - - Show quoted text - Actually all grounds MUST BE BONDED! The more the salt in water the more conductive it is! Human bodies are part saline salt.... |
#12
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Cold water grounding
Likely the box has a independent ground to ground wires outside. There should also be a ground coming from the service and one going to any metal water pipes you have. Relying on water pipes to provide ground is no longer code. Older homes that originally had fuse boxes were routinely "grounded" with the water pipe. The ground wire went to where the water pipe entered the house. That would preserve the ground in cases where plastic pipe was installed inside the home. Problem is that if the water utility decides to "upgrade" their service the odds are that they will go to PLASTIC mains (up to 10"). They are doing that in the more built up areas "around here." The "drops" (from the street line to the house) seem to be copper. I suspect that was done mainly to not have to pay the customer to put in ground rods. But everything seems to be plastic whenever possible today. The low pressure gas lines (up to 8" by my directly observation) are plastic. The drops are plastic. They protect the plastic above ground with a metal sleeve when it enters the meter. Grounding can be a serious concern. We have an unusual situation with a 400' run from our house to the transformer but we "lost" the neutral once. If the neutral to the transformer is intact, the ground rods or water pipe just don't make any difference. If the neutral is broken it's not obvious that a two un-tested ground rods could keep you from getting a shock. -- Joseph Meehan Dia 's Muire duit |
#13
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Cold water grounding
Here in Florida, there are some restrictions as to using bare copper
that comes in contact with sandy soil -- seems that the salts become conductive and can lead to accelerated corrosion. Does anyone have any experience with this? |
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