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Can a QO318L200GRB (Main Lugs Only) load center be converted to a Main Breaker device?

Needs main breaker to a main lug load center

Product Line:
QO Load Centers

QO Load Center Main Lug Only Load Center

Needs main breaker for a load center

This load center is a Fixed Mains device, meaning that a Main Breaker Kit cannot be applied. However, a 3-pole QO or QO-VH branch circuit breaker, up to 100 ampere maximum, can be back fed as a Main Breaker. A PK3MB Retaining Kit is required if the main is to be backfed. The back fed circuit breaker would must be installed in the top 3 spaces on the left hand side. 

An alternate option is to feed the Main Lug load center from a separately mounted enclosed breaker.  
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