200 amp multi family dwelling please help aSAP

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electriceric101@yahoo.com

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medford,nj
Hello iam doing a service tommorrow 200 amp drop into 2gang meter cabnit and out 2 100 amp seu's for 2 100 amp panels for a duplex i am preety sure i just need a #6 to 2 ground rods with a jumper between the 2 panels and a #4 between the water main and panel with a jumper between the panels am i right?
 
I prefer this method from the NECH, taps with a split bolt:

250.66 Taps.JPG
 
NO !!
(Nor is the attitude)

The #6 to the ground rods would be correct.
Without specifics (service conductor size, etc) we can only assume the #4 is correct for your water line.
The "jumper between panels" is probably not Code compliant, depending on the specifics again.

250.64(D) is the guide, but, in layman's terms, you don't "jump" between panels. Your GEC is sized to your service conductors and a TAP to the panels connects them. Basically it should be designed so removal of either panel will not disconnect the GEC to the other.
 
Hello again Augie, what do you think of running his #4 from the water line to one of the panels, terminates it there, and run a tap (#8 likely) from the other panel and split bolt it to the #4.
 
mark32 said:
Hello again Augie, what do you think of running his #4 from the water line to one of the panels, terminates it there, and run a tap (#8 likely) from the other panel and split bolt it to the #4.
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See Infinities post. Even though I’m not Augie, i don’t believe your method would be code complaint. Yet, the OP could run an individual GEC (Size based on service entrance conductors serving that enclosure) from each service disconnecting means enclosure, to the GE.
 
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mark32 said:
Hello again Augie, what do you think of running his #4 from the water line to one of the panels, terminates it there, and run a tap (#8 likely) from the other panel and split bolt it to the #4.
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I think that plan would be acceptable, however, IMO. the GEC from the water line would most likely be a #2 (in his specific case we don't know, but based on 3/0 service conductor) and tap would be a #4.
Again, I'm guessing service conductor sizes but 250.64(D)(1) gives the basis guides,
I have seen the one GEC run to the panel with a tap to the second panel (the tap located outside pf panel 1) and I have seen a common GEC to one point and then a tap to each panel.
It is also common to run a separate GEC from each panel to the GE.
IMO, all these are acceptable.
 
If it's a duplex, there may be two water services, so he would need to bond both of them.

The two gang meter socket would be your main service so you would only need to run the #6 and the #4 water bond to that and then pull your subfeeds to the panels.

If I'm picturing it right in my head.
 
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cowboyjwc said:
If it's a duplex, there may be two water services, so he would need to bond both of them.

The two gang meter socket would be your main service so you would only need to run the #6 and the #4 water bond to that and then pull your subfeeds to the panels.

If I'm picturing it right in my head.
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I agree with John - this is a single 'main' enclosure with 2 meters....the 2 panels the OP is talking about [assumption here] are the 2 distribution panels in the units. [He said he had a 2-gang meter cabinet, and out of that he is feeding (2) 100A panels with SEU]
 
dana1028 said:
I agree with John - this is a single 'main' enclosure with 2 meters....the 2 panels the OP is talking about [assumption here] are the 2 distribution panels in the units. [He said he had a 2-gang meter cabinet, and out of that he is feeding (2) 100A panels with SEU]
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Although I would prefer to run GEC to the meter cabinet myself, it was not mentioned whether or not there is overcurrent protection within the 2 gang meter. If not then the 2 - 100A panels are part of the service equipment.

They may be allowed in separate locations because of the multi - occupant situation, otherwise they need to be grouped in same location.

230.2(B)(1) says
Multiple-occupancy buildings where there is no available space for service equipment accessible to all occupants
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If there is space for a 2 gang meter socket why isn't there space for the service disconnects at same location. I think this install needs disconnects at the meters and that would result in GEC also run to same location.
 
kwired said:
Although I would prefer to run GEC to the meter cabinet myself, it was not mentioned whether or not there is overcurrent protection within the 2 gang meter. If not then the 2 - 100A panels are part of the service equipment.

They may be allowed in separate locations because of the multi - occupant situation, otherwise they need to be grouped in same location.

230.2(B)(1) says

If there is space for a 2 gang meter socket why isn't there space for the service disconnects at same location. I think this install needs disconnects at the meters and that would result in GEC also run to same location.
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I see where you're going with that and like I said "if I'm picturing it right". I "assumed" two meters and two 100 CB's.
 
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