Electrical calcs

kaiser715

Doing hard time
Joined
Jun 1, 2006
Location
7, Pocket, NC
Need some help with sizing a branch circuit to a subpanel.

Aluminum URD (direct burial) quadruplex
Distance 550'
100 amps max
3% voltage drop (some say use 4%)

Online calculators vary quite a bit....depending on which one, I get anywhere from 4/0-4/0-4/0-2 to a 500 kcmil set.

Opinions???
 
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