We just finished installing a 400amp 1phase multi-meter service on an industrial condo storage building. ConEd called to confirm some information and during the conversation ConEd said "3phase" and I said single.
Now, ConEd is saying they may have to change the transformer out to a larger unit due to the imbalance caused by single phase. If this needs to be done, it would be charged back to the building owenr. ConEd said their documentation stated the building would have 3phase power, not single.
My drawings called out single phase. I wanted to install a larger service and 3phase but the customer declined.
