APARTMENT CALCULATIONS

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frostback

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IT IS MY UNDERSTANDING THAT IF MY CALCULATION USING THE STANDARD CALCULATION EXCEEDS 100AMPS
I CAN USE THE OPTIONAL CALCULATION DESCRIBED IN
220-30 TO REDUCE THE APARTMENT FEEDER SIZES TO
60,70,80,OR 90A AS CALCULATED PER 220-30.
IS THIS CORRECT
 
Re: APARTMENT CALCULATIONS

Not exactly.

The section makes no mention of first calculating service loads by the standard method. The section specifically states:

"For a dwelling having a TOTAL CONNECTED LOAD served......"

This just means that if you add up all the loads to be served, and they exceed 100-amps, the optional mehtod may be used.

Per 230.79(D), other than One-family Dwellings may have a service no smaller than 60-amp. :)
 
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