John,
I believe the problem is that this board is a Square D custom made, main distribution panel that has room for about 6 breakers. The left side of the panel was created to accept large frame breakers, so there is three 3-pole large frame ( 400-600 amp) breakers on thihe left side. The right side of the panel can not accept the large frame style breakers. There is a smaller 3 pole 100 amp breaker there now and room for 2-3 more breakers. The EC said that he checked with the manufacture about getting a breaker for this panel and they said that there was no way to do it. (That is why I was looking for a letter from the manufacture stating that it was impossible.) He is going to get more information for me, the job is red tagged for now.
