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Can a QO2150, QO2175 or QO2200 branch circuit breaker be used as a back-fed main in the appropriate QO load centers?

Product Design Feature

Product Line:
QO Load center and branch breakers

Branch breakers



Yes, but ONLY in QO single-phase load centers, Series S01, S02 or newer, rated 150 to 225 ampere MAX.  However, the branch breaker ampacity cannot exceed the load center mains ampacity rating. The installation of the breaker as a back-fed main will also require the use of a PK5RK retaining kit.

NOTE: These breakers can be applied only in Square D SINGLE PHASE QO load centers. DO NOT USE IN Square D THREE PHASE QO load centers or other manufacturers load centers or panelboards. See the Instruction Sheet provided with the circuit breaker or sub-feed lug kit for further mounting restrictions that may apply regarding mounting these devices or adjacent branch circuit breakers.

CTA-ID : 2006515
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