Split service question

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ammklq143

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Location
Iowa
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Electrician
I'm working on an estimate for a house that was converted to an apartment. There has been some work already done on it and there are 3 separate apartments. Each has there own breaker panel installed inside and has a disconnect on the outside of the building. As of now, they are all running through one meter but they want to meter them individually. They want a triple gang meter socket so each of the disconnects on the outside of the building can be fed by it's own meter. I'll try to explain this as well as possible. On the outside of the apartment there is a 100 amp disconnect that feeds a panel inside with a 100 amp main. Disconnect number two has a 200 amp breaker in it and it feeds a panel with a 150 amp main in it. Disconnect number 3 is the same as number 2 and has a 200 amp breaker as a disconnect outside and feeds a panel with a 150 amp main. So, I have a 100 feeding a 100, a 200 feeding a 150, and another 200 feeding a 150. The wire between the 200's and the 150's is sized for the 200's so that should be fine, but when sizing the service entrance should I use the size of the disconnects outside or the size of the main breakers in the panels since they are the only load on their own disconnect? Also, what can I derate the service entrance cables to in order to feed the meter socket for a multi family dwelling like this?
 
I would assume that worst case would be to size the SE conductors to 220.84 and a demand factor of .45 x 500 (100 am + 200 amp + 200 amp) = 225 and use 225 amps to size the conductors or possibly use the size of the main breakers in the panels in the house and .45 x 400 (100 + 150 + 150) = 180 amps. Right? Or no?
 
ammklq143 said:
...They want a triple gang meter socket so each of the disconnects on the outside of the building can be fed by it's own meter.
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Is POCO going to be OK with this?
Depending on your local codes governing rental housing you may have to provide a fourth meter for common area loads like outside and hallway lighting, and laundry room if there is one. And in some areas each renter would have to sign up for their service directly with POCO, since the landlord will not be allowed to re-bill them separately for their metered portion of a single service.
 
mjf said:
As a side note, keep in mind that a "landlord" meter may be needed for lighting in common areas, or if each apt has common heating/cooling equipment, etc.
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I think the landlord lives in the apartment with the 100 amp and the hallway lighting and laundry facilities are on that panel. Each apartment has their own HVAC on their respective breaker panels.
 
GoldDigger said:
Is POCO going to be OK with this?
Depending on your local codes governing rental housing you may have to provide a fourth meter for common area loads like outside and hallway lighting, and laundry room if there is one. And in some areas each renter would have to sign up for their service directly with POCO, since the landlord will not be allowed to re-bill them separately for their metered portion of a single service.
Click to expand...

The POCO is fine with it as long as I use an approved socket. I mainly want to make sure I size the conductors from the meter to the first disc properly and the SE conductors. Not sure if I need to size them for the 200 amp disc or for the 150 amp main......?
 
GoldDigger said:
Is POCO going to be OK with this?
Depending on your local codes governing rental housing you may have to provide a fourth meter for common area loads like outside and hallway lighting, and laundry room if there is one. And in some areas each renter would have to sign up for their service directly with POCO, since the landlord will not be allowed to re-bill them separately for their metered portion of a single service.
Click to expand...

mjf said:
As a side note, keep in mind that a "landlord" meter may be needed for lighting in common areas, or if each apt has common heating/cooling equipment, etc.
Click to expand...


HAHAHA Once again proving that, (between my brain formulating thoughts and sentences and my hunt and peck style of typing), I'm just plain old slow!! :D
 
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