Help selecting service voltages

[zopnudy]

When planning for new buildings 10,000 sq.ft. to 50,000 sq. ft., when is it cost effective to raise voltages from 120/208v 3 ph. to 277/480v 3 ph?

 

[busbar]

See a book like Beeman, Industrial Power Systems Handbook. The infomation provided is insufficent to answer the question.

 

[redtrumpet]

Possibly see also IEEE Std. 241 (Gray Book), "IEEE Recommended Practice for Electric Power Systems in Commercial Buildings".

 

[wbd]

Also, check with the local utility to see if they provide 480 in that area.