I was asked by a customer to do a load calc on his service to see what all tenants are using. This is a 480/277 3phase system. He doesnt want to get too detailed. So, I am thinking on calculating all 480v loads and base calculations on that and not worry about any transformers installed downstream. Ill be capturing the xfer load on my calcs. what do you guys think?...I am using a load calc software.