I need to take the overcurrents off a motor starter in an MCC. The problem I have is that the motor starter is racked into a live 600 Volt bus. I want to know if I can rack out the motor starter without isolating the whole MCC (there is only 1 bus in the MCC). Is this usual practice. Any bad experiences when racking the starter back onto a live bus.
Any rules in any standard on how to do this.
Any web site on how to do this.
Any help would be appreciated.