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Can a QBL circuit breaker (the 10,000 AIR version of the standard QDL main breaker, which is rated 22,000 AIR) be applied as a main breaker in a three phase QO load center?

No, this cannot be done, because no UL testing was performed. Installing a QBL circuit breaker as a main breaker in a three phase QO load center will void the product warranty.


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