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	Subject - dewling cal. cs409 load calculation.. older home,,,,2200sq ft.....open porches,,,,,,one detached garage... one free standing electric cook stove, one electric dryer, one 4500watt hot water heater. has 2 bathrooms, 1 laundry room...... gas heat. no dishwasher, no disposal....... it has a build in venthood/microwave unit. now the kicker... 8 room AC units(no heat), 4 are 12,000btu, 120v and 4 are 10,000btu 120v units(all 8 probably rated at 115v) anyone care to put some numbers to this ?? thanks.... Ryan_J What is the wattage of the A/C's? cs409 sorry, just got this info emailed to me so let me give it... 10,000BTUs are ENERGY EER Rating: 10.8 Energy Star: Yes Voltage: 115 Volts Max Amps (Cooling): 8.5 Watts (Cooling): 920 12,000BTU models are ENERGY EER Rating: 10.8 Energy Star: Yes Voltage: 115 Volts Max Amps (Cooling): 10.2 Watts (Cooling): 1110 so we have 4 units at 990watts and we have 4 units at 1110watts thanks Ryan.... David Hyatt General Method of Calculation 2200 x 3va= 6600va 2x 1500va= 3000va 1x 1500va= 1500va = 11,100va apply demand TDL220.11 =5,835va 4 @ 990va= 3900va 4 @ 1110va= 4440va 1 @ 4500va= 4500va dryer @ 500va stove @ 8000va largest motor 10.2 x 115v= 1173va x 25%= 294va 5,835va+ 3900+ 4440 + 4500 + 500 + 8000 + 294= 27,469 27,469/ 240volts= 114.45 amps tbl 310.15B6 114 amps= 125amp service with #2 copper conductors Hope this helps for a more accurate calculation with the microwave being named in the question it too would have to be figured in. @ 100% va cs409 thanks,,,,, i was a bit lost as to how to do the 8 AC window units... how all r having a good holiday....casey