I have recently been asked by strip mall if their 700KVA transformer will handle 800 more amps of fused pull outs/4 more 200 amp panels, for perspective tenant. All units are 120/208 single phase and current tenants have an equivalant of 2000amps of max capability through a combine panel rating and SES fused pull outs. What is the formula? Do I need more information to calculate this? or should I just tell him "I an electrician not an elctrical engineer, and I show my paycheck to prove it" :grin: