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#1
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Bonding to existing panel ground
I'm helping out a friend with a new house who wants to add surge
protection. The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? |
#2
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Bonding to existing panel ground
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#3
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Bonding to existing panel ground
On Mar 31, 8:45*am, wrote:
I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? You should be able to get a split bolt connector that lets you attach to the exposed ground lead. I would not run it inside the panels as that will generate all sorts of questions. |
#4
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Bonding to existing panel ground
On Mar 31, 11:22*am, wrote:
On Wed, 31 Mar 2010 05:45:55 -0700 (PDT), wrote: I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? I would suggest moving into the 21st century and install an inter system grounding block. (2008 code) This is a terminal strip that has a "lay in" lug for the grounding conductor you are talking about and several terminals for attaching other grounding conductors. The home store should have one but any electrical supplier will if they don't- Hide quoted text - - Show quoted text - Actually the house was built in the 21st century, only 4 years ago. But I guess they finally updated the code to something logical that all new homes should have. Anyway, thanks for the help. That is exactly what I need. A little googling produced this: http://www.arlnew.com/gb/ |
#6
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Bonding to existing panel ground
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#7
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Bonding to existing panel ground
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#8
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Bonding to existing panel ground
On Mar 31, 6:47*pm, bud-- wrote:
wrote: I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? If I was doing it, I would just use a split bolt as others have suggested. You want to minimize wire length to the common connection point. |
#9
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Bonding to existing panel ground
On Mar 31, 8:45*am, wrote:
I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? Where I live you cant take this type of ground into the service panel. It must go directly to the ground rod. There are rules about how far away it can be from the rod too. Jimmie |
#10
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Bonding to existing panel ground
On Apr 1, 9:40*am, JIMMIE wrote:
On Mar 31, 8:45*am, wrote: I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? Where I live you cant take this type of ground into the service panel. It must go directly to the ground rod. There are rules about how far away it can be from the rod too. Jimmie- Hide quoted text - - Show quoted text - How's that work when the ground is a line tied to the foundation rebar instead of a rod? Cause that's how a lot of new construction is being done now. Can you attach near the point the line goes into the block? |
#11
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Bonding to existing panel ground
On Apr 1, 10:09*am, jamesgangnc wrote:
On Apr 1, 9:40*am, JIMMIE wrote: On Mar 31, 8:45*am, wrote: I'm helping out a friend with a new house who wants to add surge protection. *The plan is to use a whole house AC surge protector at the panel and a seperate cable coax surge protector located a few feet away where the cable enters the house. The question is, how to tie the seperate coax protector to the house ground? *There are actually two 150 amp panels next to each other. The service comes into a long narrow metal box between the two panels, which in turn feeds the two 150 amp panels. * There is a heavy gauge copper ground wire that runs from this narrow metal box into the concrete basement slab. * So, what is the correct, code compliant method to bond to this? Can I buy some type of bolt on connector that I can slip over the exposed existing ground wire outside the box and secure another ground wire to it and then run over to the coax protector? *That would seem to me to be the preferred method, if permissible. Or can I bond to the ground inside one of the breaker panels and run a ground wire from the panel out to the coax protector? Where I live you cant take this type of ground into the service panel. It must go directly to the ground rod. There are rules about how far away it can be from the rod too. Jimmie- Hide quoted text - - Show quoted text - How's that work when the ground is a line tied to the foundation rebar instead of a rod? *Cause that's how a lot of new construction is being done now. *Can you attach near the point the line goes into the block?- Hide quoted text - - Show quoted text - That's exactly what the inter-system grounding blocks are designed for. I guess the remaining question is if anyone is going to bitch about exactly how close to the grounding electrode one places the grounding block. In my case, the logical place would be right beneath the panel, about 4 ft. which seems reasonable to me. I could mount it lower, but then I'd have to secure another plywood mounting board to the blocks. Much easier if I just put it under the panel. Don't see that it makes any difference anyhow, as the total length of wire from the cable coax surge protector or anything else that gets connected to ground is going to be the same anyway. |
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