There are many reasons you may or may not be allowed to have a receptacle. If you are going to have a receptacle you likley will have flexible cord, so start with 400.7 and 400.8 to determine if you can use a flexible cord.A 3HP 480V/3 phase pump has a reversing motor starter in an MCC. Is it possible to add a receptacle for this pump? I've never had a receptacle for a pump that's going off of a starter before. Will it damage the pump's motor?
Why are you reversing a pump?