Feeder for house panel in apartment complex

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wyboy

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Is there any de-rating for a house panel in an apartment complex? The house load is mostly a small laundry room with water heater. am i allowed to de-rate as if the washers and dryers were in the apartments?
 
when u size up conductors with respect to demand loads, the demand loads (such as laundry) are considered when sizing the service pwr feeder not individual tenant panels. This house panel doesn't sound like it is a service panel so size it per connected loads.
 
as i read that, (Table 220.84), you derate all the tenant loads. then add the house requirements afterwards. i am doing that now. i have to wait and find out how many amps the elevator requires first. but wheew! went from about 1800 Amps down to 1000!!! (24units w/elect. heat):D
in my case all units have dryers as well, unlike yours. i would asssume if you have a common laundry you could use the table for dryer derating per # of dryers for your house panel
 
bullheimer said:
as i read that, (Table 220.84), you derate all the tenant loads. then add the house requirements afterwards. i am doing that now. i have to wait and find out how many amps the elevator requires first. but wheew! went from about 1800 Amps down to 1000!!! (24units w/elect. heat):D
in my case all units have dryers as well, unlike yours. i would asssume if you have a common laundry you could use the table for dryer derating per # of dryers for your house panel
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i came across 220.84 (long forgotten) reading the calc. examples in the back of the codebook. those examples back there are a great help to those of us who haven't had the pleasure of doing certain kinds of calc work. same with old textbooks, (for thems what went fer proper skoolin.)

i was searching these posts hop'n to come up with whaaaasup with the ol Dishwasher on the same circuit as Disp. question for number of small appliance ckts.
although allowable, ("non-coincidental loads" covers it for me) by my local AHJ's, i am still trying to find out if i have to add 1500W sm.apl.ckt for each to my load calcs. the inspector i talked to wasn't up on his calcs he said, but said there was some kind of change re this in the '08 codebook. so i guess i better throw out my '05 book and get out the new one, since we just went to it. all i need is another 1500Wx24 apts. (x.35x.35) waazzat add up to....?
 
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