Adding 100 amp to 200 amp service

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Cletis

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Ok. We have to add a 100 amp service with main breaker panel right next to a 200 amp 4 gang meterbase service and attatch at service drop. Treat as individual for ground rod and water bond or bond single meter to 4 gang with #6,#4? Main panel bond to 4 other main panels (size bonding?) or run seperate #6 to water main??


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Since you have a separate set of service conductors I would think the simplest route would be to treat it as an independent service and bond it with a #6 to the existing ground rod and existing water main, etc.
 
augie47 said:
Since you have a separate set of service conductors I would think the simplest route would be to treat it as an independent service and bond it with a #6 to the existing ground rod and existing water main, etc.
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I sort of thought that but then you would have parallel paths for grounds which are not good?


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Cletis said:
Im really not sure other than dennis alwon says its bad
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I don't recall Dennis ever saying anything about a parallel GES conductors much less being a bad thing, I think you misunderstood something.

With that said, there is no problem using the existing GES and in truth you would have too anyways.

Roger
 
Anyhow, this is a landlord who has a bunch of 4 familys on 4 gang meter boxes (no house) and got nailed. Now, were just going to set 100 amp services next to due to monetary restrictions. Just looking for best way to bond all this


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Cletis said:
Anyhow, this is a landlord who has a bunch of 4 familys on 4 gang meter boxes (no house) and got nailed. Now, were just going to set 100 amp services next to due to monetary restrictions. Just looking for best way to bond all this


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Just use the existing GES (you have no choice, see 250.50) and submit your bill.

Roger
 
roger said:
I don't recall Dennis ever saying anything about a parallel GES conductors much less being a bad thing, I think you misunderstood something.

With that said, there is no problem using the existing GES and in truth you would have too anyways.

Roger
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It may be a confusion with the concept of single point grounding in which the EGC network connects to the GES network at only one point.
That is ideal for some types of "noise" current (like lightning induced earth currents) and irrelevant for others.

mobile
 
GoldDigger said:
It may be a confusion with the concept of single point grounding in which the EGC network connects to the GES network at only one point
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I think you're right. Cletis take note of what GoldDigger is saying, not what you think Dennis said.

Roger
 
Cletis said:
Ok. We have to add a 100 amp service with main breaker panel right next to a 200 amp 4 gang meterbase service and attatch at service drop. Treat as individual for ground rod and water bond or bond single meter to 4 gang with #6,#4? Main panel bond to 4 other main panels (size bonding?) or run seperate #6 to water main??


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Click to expand...
It is still one service if supplied by the same drop as the other disconnecting means. You have just added one more service disconnecting means.

All the disconnecting means need a connection to the grounding electrode system, unless you tied the GEC to a common point ahead of the disconnecting means which in this case would likely be at the service drop termination point.
 
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