AccessWorkBoots
Member
- Location
- NJ
Hello, I have question about the method for sizing a generator to feed both 480v and 208/120v loads. I'm connecting to a 480 volt panel with a main, then feeding a step down xfrm to a 208/120 panel. My loads to be served are both 480v and 120v. I made a chart with a 480 column and a 208/120 column and calculated the wattage for each load. Now, my question is: can I just add the wattages together from each column to get the total KW needed. Of course I'm going to give myself a little wiggle room, but I just wanted to check my logic about calculating wattage at 480 for the 480 loads, then calculating the wattage for the 120v loads and adding them together for the total. I'm thinking that because watts are a product of current and voltage (taking into account the 1.723 and p.f. for 3 phase) I should be on the right track. What do you think?
Regards
Regards