Tom, The #2 is ok and so is the #4. The way I read your post tells me that the apartments are only recieving 60 amp. Sounds like you need to upgrade if your heat is bb's. As for the "bond lug" that was attached to the "nuetral bus". That's improper. The ground wires are attached to the "metal conduit". If you look I am sure that you will find the "metal conduit" is attached to the panel. Hence, if your "bond lug" is attached to the "nuetral bus" you are no longer isolating the nuetral and ground.
