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Can a convertible Main Lug Only (MLO) QO load center be used on a 240Vac grounded B phase Delta system if the MLO is converted to a Main Breaker (MB)?

Issue:
Product Design feature

Product Line:
QO load centers

Environment:
Voltage system application

Cause:
Application

Resolution:
No, if the MLO load center is converted to a Main Breaker load center, it cannot be used on the 240Vac grounded B phase Delta system. The QOM1-VH and QOM2-VH main breakers are not UL Listed for use on this voltage system.


CTA-ID : 2007221
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