Housing development

[mdshunk]

Would the demand calc that one would do for a multi-family building be roughly the same calculation that you would do for a housing development? Are there some other factors that would enter in? Street lighting comes into mind, as well as I squared R losses in the transformers. Granted, a utliity engineer would need to get involved at some point in this. I was just going to try to do one myself, just to for practice, and to see if I agree with the numbers that the engineer may come up with. I think that the particular example that I'd like to try would be pretty easy, because there will be about 108 identically sized and equiupped units.

[Wgoodrich]

The Code does not really approach this type loading because the serving utility normally does it. To follow the Code as it is designed you would calculate one home [being all identicall in size and load] then multiply by that number of homes on that system. The Code does not really provide a diversity in this type design. Again this is as I said above because most often the utility safety rules apply being a serving utility problem to calculate and engineer.

Now that said you should find your diversity and loading as you are trying to do as a close call using the mobile home park loading calculations found in article 550 of the NEC Part III [550.30 through 550.33] for mobile home parks using the demand load of the home per 220 to plug into the demand factors allowed for mobile home parks. This to me would be as close as you could get with available info in the NEC.

Hope this helps

Wg