If you are going to continue to ask us questions of this nature, I must ask you to start including some information related to your own attempts to answer the question yourself. We can help you learn, and most members are willing to do so. But we generally don't like to give away answers to people who do not make an effort to find the answer first.
So as Dennis said, how did you come to the conclusion that a 2/0 is the right size? Please note that whenever you speak of sizing conductors, you need to make it clear whether you are talking about copper or aluminum conductors.