Is there a rule as to which bus bars in an I-Line panel are used for single phase applications?

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Issue:
Which bus bars are used for single phase applications in an I-Line Panelboard?

Product Line:
Panelboards

Environment:
I-line Power distribution Panelboards

Resolution:
A & C phases are typically used on factory assembled panels which is in accordance with application data provided in the Information Manuals supplied with I-Line panels.