Service Sizing Question

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peakelectric

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Nevada
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Contractor
Hello,

There is an existing 4 meter bank enclosure with 4 60a breakers that needs to be replaced.

The utility is currently providing a 200a service. The only replacement meter packs I could find have a 400a bus.

www.eaton.com

1MP4124RC | Eaton meter pack | Eaton

1MP4124RC - Eaton meter pack, 125A, Copper, Bus: 400A, No bypass, NEMA 3R, 4, Single-phase in/single-phase out, BR_, BRH_, BRHH_, Ring, 120/240V
www.eaton.com www.eaton.com

My utility is saying "We size to the landing section, so in this case, we would run a service for 400A"

This project is an overhead service, so we would prefer to not have to upgrade the service, because it would need to be changed to an underground service.

I am having trouble finding a 4 gang meter pack with a 200a bus. Would it be in regulation to bring the service into a 200a disconnect first, then over to my meter pack with the 400a buss?

Any suggestions here?
 
Many utilities will not allow a main ahead of the meter. Why not use a wireway with 4 meters and 4 panels....One riser or mast.
 
That is a silly POCO rule. There is no reason to match the riser to the buss rating of the meter stack. Maybe ask them again. Maybe there is some work around like putting a plaque stating 200A max. Just a few weeks ago I had a similar thing happen. I provided a 288A riser to a meter stack with a 500 amp bus rating. POCO guy questioned it and wanted to double-check the inspector was ok with it. He did let it go and hook it up.
 
electrofelon said:
That is a silly POCO rule. There is no reason to match the riser to the buss rating of the meter stack. Maybe ask them again. Maybe there is some work around like putting a plaque stating 200A max. Just a few weeks ago I had a similar thing happen. I provided a 288A riser to a meter stack with a 500 amp bus rating. POCO guy questioned it and wanted to double-check the inspector was ok with it. He did let it go and hook it up.
Click to expand...

Thanks, Ill try to give the inspector a call and see what he says.
 
The utility got back to me, they are allowing me to install a 200a disconnect to connect to the service, from there I will go into my 400a meter bank.
 
electrofelon said:
That is a silly POCO rule. There is no reason to match the riser to the buss rating of the meter stack. Maybe ask them again. Maybe there is some work around like putting a plaque stating 200A max. Just a few weeks ago I had a similar thing happen. I provided a 288A riser to a meter stack with a 500 amp bus rating. POCO guy questioned it and wanted to double-check the inspector was ok with it. He did let it go and hook it up.
Click to expand...


400 Amp Service

I think we have had this discussion before...... Residential 400 amp services Two 200 amp panels Two sets of 4/0 aluminum SE cable, one feeding each MB panel Code compliant...or not? I'm gonna get some popcorn 🍿 and watch....
forums.mikeholt.com

Did he ask for the calculations? Personally I don't like it. 400 amp gear fed with 300 amp wire... boy someone may get alittle peeved when they want to do something someday and see you may have cut them short. imo
 
ritelec said:

400 Amp Service

I think we have had this discussion before...... Residential 400 amp services Two 200 amp panels Two sets of 4/0 aluminum SE cable, one feeding each MB panel Code compliant...or not? I'm gonna get some popcorn 🍿 and watch....
forums.mikeholt.com

Did he ask for the calculations? Personally I don't like it. 400 amp gear fed with 300 amp wire... boy someone may get alittle peeved when they want to do something someday and see you may have cut them short. imo
Click to expand...
It was a 4 unit apartment. Load calculation was about 250 amps. Gear was square D 5 gang meter with 5 100 amp disconnects. 230.90 exception 3 permits the riser sized to the load. I see no reason to do otherwise. There is no chance of change or expansion here.
 
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