Service or Branch Feeder? you make the call...

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emahler

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We have 2 buildings that are right next door to eachother. Both buildings are owned by the same company.

Building A has a 1200A 208/120V service and is used for 1 purpose exclusively by the owner of the buildings.

Building B has a 100A 208/120V service and is broken into a couple of spaces that are rented out to tenants.

As part of a new project, part of Building B will now be used exclusively for the business occupying building A. It will no longer be rented.

As part of the upgrade, the engineers plan is to install a 400A 208/120V feed from the 1200A MDP in building A, through the basement of building A, through and exterior alleyway between the 2 buildings, back into a 2nd basement of building A, through the common basement wall between Building A and Building B, and finally upto a new 400A MCB panel in Building B.

Would you consider this a Service Feeder or a Branch Feeder?
 
emahler said:
As part of the upgrade, the engineers plan is to install a 400A 208/120V feed from the 1200A MDP in building A,
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Leaves from MDP. Feeder unless tapped before the main.
 
mdshunk said:
Other than being already fused, all the same rules apply to it when it arrives in building B as would apply to service conductors.
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would you put it under section 230 or 225 for purposes of disconnects?
 
mdshunk said:
Other than being already fused, all the same rules apply to it when it arrives in building B as would apply to service conductors.
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Marc, In building #2 the GES would connect onlt to the feeder EGC, don't you think so ?
 
emahler said:
the engineers plan is to install a 400A 208/120V feed from the 1200A MDP in building A
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It's a feeder. Where is the trick in this question?

Service. The conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served.
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chris kennedy said:
It's a feeder. Where is the trick in this question?
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that's how I see it...the engineers attempted to classify it as a service and put it under 230...

this all came up because we rerouted conduits and they got pissed...they attempted to make up put a disco in at our expense. we had already gone over this with the inspector, who classified it as a branch feeder, under art 225, and didn't require a disconnect...

so I got pissed and called them on it. They claimed that the original routing, which is what I described earlier, it was a service and subject to 230...

then i reminded them that there was a slight issue with 230.3...

it was a moot point, as the conduit was installed and the inspector approved it...

but it bugged me to have them bust my chops over something that they were incorrect about...
 
Jim W in Tampa said:
So does this building now have service of its own and from building a ?
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yes. it's open to interpretation whether they are really 2 buildings or one. They share a common wall and have a common fire alarm and sprinkler system.
 
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chris kennedy said:
It's a feeder. Where is the trick in this question?
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I would agree. My understanding that anything before the first disconnecting means is service, anything inbetween OCPs means is considered a feeder.
 
360Youth said:
I would agree. My understanding that anything before the first disconnecting means is service, anything inbetween OCPs means is considered a feeder.
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that's my feeling...but the engineers thought different...and i'm waiting for marc to clarify his position a little more...
 
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