Are single pole QOB breakers ok for use on grounded B phase system?

Issue:
Are 1p QO and QOB breakers marked for use on grounded B phase systems?

Product Line:
Circuit Breakers

Environment:
QO and QOB single pole breakers

Resolution:
No, 1-pole QO and QOB breakers are not marked for use on grounded B phase systems.

Released for:Schneider Electric USA