I was asked to look at a project the other day. The job is an 8 office strip. The owner has old equipment that is out of date and really beat up. He has a 4" conduit coming off the XFMR to a 8x8 gutter, out of the bottom of the gutter there is (8) meter cans, out of the bottom of the meter cans feeds (8) 100A diconnects. Out of the disconnects feeds (8) 100A distribution panels. The gutter has (3) 500mcm inside of it that has been sliced into for each meter base. The owner would like to install a new main disconnect, and replace the old worn out equipment. My question is If I install a new Main Disconnect the way I understand it, that it needs to be an 800Amp to protect the 8-100 panels? right.
