400 Amp Service NEC Question

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Palmer

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So I am looking to put up a new service on a first floor Restaurant and a 2 apartment dwelling.

My idea was this, run Sch. 80 PVC with 600 mcm aluminum about 30' down the building and into a trough, where I wanted to use taps.. Feeding 1 200 amp meter with a bypass, and then feeding 2 100 amp meter disconnects, no SER would be installed in this trough, they would come through the backs of the meter disconnect. Is everything I am thinking of compliant with the NEC?

It would basically look almost exactly like the picture listed below but obviously not with a panel installed with branch circuits installed.

Would I need to have overcurrent protection before my 3 meters?

I was also going to oversize my wires to the meters, like use #1 aluminum to feed the meter disconnect and then have my SER come into the panel side of the meter disconnect and land that on the 2 pole 100 amp breaker. Do I need to do this or just use the respective wire to feed each meter?
 

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Dennis Alwon said:
Sounds good to me. Does the restaurant not need 3 phase?
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Nope, it's all single phase and to order a meter stack would be much longer of a wait and they need this done asap.. I already ran the SER to each panel in the building.. I just have to install the exterior tomorrow. I am using a single phase 200 amp meter with a bypass and 2 100 amp meter disconnect combos. The 2 100 amp have the breakers in them and the 200 amp will have a main breaker panel. I think I was getting confused on the tap rules reading "feeder" and didn't realize right there it said that service conductors are no OCPD.

Does anyone else think I'm crazy for oversizing the 100 amp wires from the tap to the meter from #2 to #1 at least?
 
How far are the service conductors traveling inside the building before they land on the Main Breaker in the 200a panel?

JAP>
 
You may get into trouble with "Grouping of Disconnects" in that scenario also, since, 1 seems like it will be inside and the other 2 will be outside.

JAP>
 
jap said:
How far are the service conductors traveling inside the building before they land on the Main Breaker in the 200a panel?

JAP>
Click to expand...


Very good question, they are going probably 60 feet, so I would need a 200 amp disconnect. Fused or non fused?
 
If it were me, I'd install a Fused Disconnect or an Enclosed Circuit breaker next to the 200a meter outside and change the indoor panel to a MLO and kill all 3 birds with one stone.



JAP>
 
The service disconnect needs to be located at or near the closest point of entry, and, best to be on the outside with the others.

60 feet's not going to cut it for service conductors entering a building unless its encased in something we haven't been made aware of.

JAP>
 
Keep in mind,if you put the OCPD on the outside you'll need 4 wire into the 200a panel.

JAP>
 
Palmer said:
I ran SER to all the panels for sure. What is my best option next to the 200 amp meter? An enclosed breaker or a fused disconnect?
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Your best bet would be a 200a meter/main just like the other 2. Those should be readily available at the supply house.

but,

If your going to stick build it,and, asking me, I'm an Enclosed Circuit Breaker type of guy.

JAP>
 
The very best bet is the group metering setup you mentioned in the first place.

That would be the cleanest.

That too should be readily available or no more than a couple of days out to get.

JAP>
 
jap said:
The very best bet is the group metering setup you mentioned in the first place.

That would be the cleanest.

That too should be readily available or no more than a couple of days out to get.

JAP>
Click to expand...

They don't have the meter disconnect with bypass, so I'm going to use the meter bypass and then feed into a 200amp enclosed breaker because it's much smaller than a fused disconnect and run my ser into the back of the enclosed breaker and call it a day.
 
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