Rob Fitzgerald
Member
- Location
- Albany NY
Recently I was posed a question regarding sizing a phase converter. The converter in question has a single phase 240V input, the output is 3 phase 480V serving a 15HP motor. The code is specific about sizing the ampacity of the input conductors. It?s my understanding the line side conductors need an ampacity of (21 x 250% x 2) = 105A. The overcurrent protection for converter would be sized for ampacity of the conductors. My question is does the code provide for a means of calculating the input current? Wouldn't the current value be needed when sizing the converter? Thanks Rob
