Labeling IBC or MWBC

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jumper

Senior Member
No. There is this however.

210.4(D) Grouping. The ungrounded and grounded circuit conductors
of each multiwire branch circuit shall be grouped
by cable ties or similar means in at least one location within
the panelboard or other point of origination.

Exception: The requirement for grouping shall not apply if
the circuit enters from a cable or raceway unique to the
circuit that makes the grouping obvious or if the conductors
are identified at their terminations with numbered wire
markers corresponding to the appropriate circuit number.
 
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