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Where does one get info to determine a branch breaker type, physical size and AIC level for an existing panelboard, switchboard, or Model 5 or Model 6 MCC ?

Determining catalog number of  breaker

Product Line:
Panelboards, Switchboards and MCC's

NQ,NF,I-Line, Speed-D,QED2, Model 5, model 6

Adding additional or replacing

One option is to get a catalog number from an existing branch of the same current range or smaller to determine the new breaker. Another option is to get the AIC from the master nameplate on the panel .Otherwise turn to drawings in the Windchill or ODM+ tools to find the equipment details. Note that there might have been some alterations to the existing gear since first built so be cautious on making statements with 100% certainty.
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