Reduced Neutral Calc

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jpmccleery

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Florida
OK, Here's my situation:
Service Voltage is 120/208, 3 ph, 4W.
Service to Dwelling is 120/208, 1 ph, 3W
I have 1248 SF apartment with the following appliances:
(2) appliance Circuits
(1) 8800W Range
(1) 744W Dishwasher
(1) 3928W Stacked Washer/Dryer (single outlet)
(1) 1200W AHU blower
(1) 5625W Heating Element

Calculating the Service according to 220.30 I came up with a 95 Amp service. What is the min. neutral conductor allowed by 220.22?
 
Re: Reduced Neutral Calc

You would normally be able to count (i.e., for neutral load) only 70% of the load from a range and an electric dryer. But since the washer/dryer is a combination unit with a single outlet, you don?t get the 70% factor for that unit. You did not say whether the heating system was 120 volt or 208 volt. If it is 208 volt, you don?t need to count that unit as having any neutral current. So I can?t answer the question without knowing about the heater voltage.
 
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