Multi-Family dwelling units w/ 200A panels

[designer82]

Have you come across any multi-family apartment buildings with 120/208 3ph service that have individual dwelling units fed 1 phase to a 200 amp feed/ panel?

The load calc. was tight but came above 125 amps necessitating a 200 amp dwelling panel/feed.



The GC/Owner think the engineering is wrong and the dwellings should be 125 amp (as that's what they already ordered)

Thanks

 

[Tulsa Electrician]

Oops
What size of feeder to the panels.
If the load calc is above 125 why use 125? Not code compliant.

First part of your question, yes

 

[retirede]

If it’s that close, be sure that the 208 wattages were used for heating appliances and not 240V values when doing the calculation.

 

[MyCleveland]

Next size up is 150....have had many at this size, why the jump to 200?

 

[designer82]

Next size up is 150....have had many at this size, why the jump to 200?

Thank you. Do they make 150A meter bank disconnects/meter sockets?

 

[designer82]

Thank you. Do they make 150A meter bank disconnects/meter sockets?

From what I see the meter stacks are 125A or 225A rated. So you would just get 225A rated with 150A breakers?

 

[JoeStillman]

200A is pretty big for an apartment. How many square feet? Are they all electric? Heat Pumps? Retirede makes a good point about using 208V instead of 240V wattages. 240V Dryers, water heaters and ranges will draw 75% of the nominal watts if they are fed at 208V.

 

[MyCleveland]

From what I see the meter stacks are 125A or 225A rated. So you would just get 225A rated with 150A breakers?

I always thought is was 100 or 200 options....tried discussing with 800# for Siemens and they are telling me smallest is 200 now.
Not sure i believe that.
Whatever your meter slot size is you should be able select that size or smaller for your CBer size.
Discuss with your sales rep...could not reach mine.