Alfont1120
Member
- Location
- Dighton, MA
- Occupation
- Electrical Project Manager/Journeyman Electrician
We are trying to feed a new 200A panel at 120/208 and myself and one of the other electricians are in disagreement of the transformer to install. I wanted to put in a 75 kva, but he is saying we can use a 45 kva because we aren't using 3 phase loads in the panel. (although we will be using two 3phase circuits). I was under the impression that when feeding a transformer with 3 phases, you had to use the 1.73 factor in your current equation, but he says we don't have to because of the lack of three phase circuits. I'd appreciate any input you guys may have, and also your recommendation on a different transformer if neither of us are going about this efficiently, thank you.