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Does a 2 Pole Main breaker need to be used to change a 400 amp I-Line 3 phase panel, to a single phase Panel?
Issue:
Conversion of I-Line 400A main breaker from 3phase to single phase.

Product Line:
I Line Panelboard

Environment:
Installation

Cause:
Main Breaker change

Resolution:
No.  A 3 pole Main breaker can still be used for single phase, simply by removing the B phase lug from the main breaker, and wiring to A and C phases only.
NOTE: All branch breakers must be single pole or two pole and can only be connected to A and C phases.

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