correct me if i am wrong. a 60 unit apartment building with indivudually metered apartments
to calculte the size of feeder and overcurrent protection (at the meter stack) and the size of the load center rating (MLO's)
the details: typical apt,
1375 square'
stackable washer and dryer electric
electric range
dishwasher
disposal
Hot water heater (small) electric
furnace (gas)
Condensor
we are being told they require 150amp each
if i use the "optional calculation for computing feeder and service loads" for the above i come up with the following (first can we use this method of calculation?)
1375 sq' x 3va= 4122va
(2) small apliance = 3000va
washer/dryer = 5000va (guess)
range = 8000va
dishwasher = 1200va
disposal = .24va
HW heater = 6000va
furnace = 1000va
Condensor = 3500va
total 27.32 KVA 100% of 1st 10kva and 40% of remainder = 16.93 KVA + 100% of condensor = 20.43 @ 208v single phase = 100 amps (i did not include the furnace in calc because i took 100% of AC. correct??)
therfore there should be no reason for me to go with 150amp meterstacks/OCP and loadcenters. I should be able to use 125amp equipment, wire size, OCP etc.. any flaws in my calculations
there is no chance for expansion later. and keep in mind this is the largest unit type by far.
to calculte the size of feeder and overcurrent protection (at the meter stack) and the size of the load center rating (MLO's)
the details: typical apt,
1375 square'
stackable washer and dryer electric
electric range
dishwasher
disposal
Hot water heater (small) electric
furnace (gas)
Condensor
we are being told they require 150amp each
if i use the "optional calculation for computing feeder and service loads" for the above i come up with the following (first can we use this method of calculation?)
1375 sq' x 3va= 4122va
(2) small apliance = 3000va
washer/dryer = 5000va (guess)
range = 8000va
dishwasher = 1200va
disposal = .24va
HW heater = 6000va
furnace = 1000va
Condensor = 3500va
total 27.32 KVA 100% of 1st 10kva and 40% of remainder = 16.93 KVA + 100% of condensor = 20.43 @ 208v single phase = 100 amps (i did not include the furnace in calc because i took 100% of AC. correct??)
therfore there should be no reason for me to go with 150amp meterstacks/OCP and loadcenters. I should be able to use 125amp equipment, wire size, OCP etc.. any flaws in my calculations
there is no chance for expansion later. and keep in mind this is the largest unit type by far.