5-Family Load Calcs - 06/28/07 03:06 PM
Wow. I haven't been on for awhile...the site looks amazing.
At any rate, I'm estimating a job for a 5-family apartment building. Each unit will have its own independant electrical system, service panel, meterbase, disconnect etc. Except obviously it will be fed from one primary service by the poco.
The engineers' calculations show a load of 155 AMPS. Now I know that its a different method of calculating because its a multi-family unit...but I'm baffled by the thought of putting a 200 AMP service in each of these 975 sq ft units. And that's total sq ft not just living space. I did a calculation for each unit and came up with 89.88 AMPS per unit.
I've asked one local inspector but I keep getting referred to the code and unfortunately I do not have access to a code book at the moment. (Because I had to go get a real job - yep I wasn't surviving amoungst the blood thirsty home builders and GCs - I ain't got that much blood).
Do I multiply the 89.88 by 5 (the number of units) and take 43% of that. I'm trying to remember what the factor in the table in 220.84 but I dont even know if the unit "qualifies" because again...no code book in hand.
Thanks in advance for the input.
Mike Donley
At any rate, I'm estimating a job for a 5-family apartment building. Each unit will have its own independant electrical system, service panel, meterbase, disconnect etc. Except obviously it will be fed from one primary service by the poco.
The engineers' calculations show a load of 155 AMPS. Now I know that its a different method of calculating because its a multi-family unit...but I'm baffled by the thought of putting a 200 AMP service in each of these 975 sq ft units. And that's total sq ft not just living space. I did a calculation for each unit and came up with 89.88 AMPS per unit.
I've asked one local inspector but I keep getting referred to the code and unfortunately I do not have access to a code book at the moment. (Because I had to go get a real job - yep I wasn't surviving amoungst the blood thirsty home builders and GCs - I ain't got that much blood).
Do I multiply the 89.88 by 5 (the number of units) and take 43% of that. I'm trying to remember what the factor in the table in 220.84 but I dont even know if the unit "qualifies" because again...no code book in hand.
Thanks in advance for the input.
Mike Donley