45kVA is a standard 3ø dry-type rating; 50kVA is the next standard 1ø dry-type rating. Arts. 450 and 240 (+250) 220-calcs are probably the primary code concerns. Voltage drop allowances and available transformer-tap combinations? Xfmr grounding electrodes AND 480V eqpt grounds are needed. Voltage drop allowances? Motor starting/air conditioning?
208Y/120 may be tempting, cheaper but not if the trailers are labeled for 120/240 service.
I’d ask for a schedule of recpetacle loads to level the playing field. Any comm/fire alarm raceways as site improvements?
45kVA is a standard 3ø dry-type rating; 50kVA is the next standard 1ø dry-type rating. Arts. 450 and 240 (+250) 220-calcs are probably the primary code concerns. Voltage drop allowances and available transformer-tap combinations? Xfmr grounding electrodes AND 480V eqpt grounds are needed. Voltage drop allowances? Motor starting/air conditioning?
208Y/120 may be tempting, cheaper but not if the trailers are labeled for 120/240 service.
I’d ask for a schedule of recpetacle loads to level the playing field. Any comm/fire alarm raceways as site improvements?
Who made the "500A" determination?
Insanity if fine -- just don't drool.
