Just wanted to see what the most popular method is for calculating the service load for residential installations, the standard or optional. It seems to me that the standard calculation is more conservative. Has that been your experience out there?
Hey EE, I've done it both ways in the past. I'm not sure what you mean by [e]conservative[/e], but I've found that most of the time the standard calculation results in a larger service. I haven't done any of these calculations, with the exception of my own house, in years. I used the standard calculation on my house. It seems like there were a few times when the optional method resulted in a larger service, but not very often.
Wattologically Yours, Doc
The Watt Doctor Altura Cogen Channelview, TX
#47483 - 01/17/0510:07 PMRe: Standard vs Optional Calculation
What I meant by conservative is that the calculated service size would be larger using the standard method vs the optional method. From the perspective of a practicing EE who worries about liability issues, and often not knowing exactly what the appliance and heating/air cond. ratings are, or how they might get changed during the construction phase, it seemed prudent to me to use the more conservative method, better safe than sorry. I wanted to see which method the experience base out there is using.
#47485 - 01/19/0512:45 PMRe: Standard vs Optional Calculation