multifamily dwelling calculation

[Voltage Enterprises]

Gave the following to local utility company, want to be sure it is correct.

Multi dwelling 10 units 100 amp meters, 1 common area 200 amp

A/C 4.08kw/unit 40.8KW 40.8
Cooking 12Kw/unit 120.0KW 90.0
Dryer 5kw/unit 50.0KW 25.0
Space Heater 30.6kw 30.6
Water Heater 4kw/unit 40.0KW 40.0
Lighting 2.7kw/unit 27.0KW 27.0
Dishwasher/Garbage disposal 2.4kw/unit 24.0kw 24.kw

Total 331.86KW 277.40KW
70% Total Connected Load 232.30Kw 194.18KW

1st Time not sure about my calculations, I sent the first column but I thought I should sent the second where I reduced each one based on quanitity, than took a further reduction at the end.

 

[bphgravity]

What method are you using to perform your calculation? It does not appear to be the standard or optional calculation as permitted in Article 220 of the NEC.

 

[haskindm]

That does not look like any calculation method I ever saw....

 

[nyerinfl]

This is what I came up with:
4500w - Small App. + Laundry
12000w - Cooktop
5000w - dryer
4000w - Water Heater
2400w - GD
4080w - A/C
2700w - Lighting (900 sf) - See 220.84(C)(1) as this may not be right.
OMIT - Heat - Smaller than A/C. (30.6 / 10 = 3.06 kW/unit)

One Unit = 34680w / 1000 = 34.68 kW per Unit.
34.68 kW x 10 = 346.8 kW
346.8 kW x 43% = 149.124 kW (Table 220.84)

See 220.84(B) for your house load as this needs to be added.