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If a QOH 2-pole breaker is installed as a back-fed main using a retainging kit, in a QO112L125G with all QOH 2-pole branch breakers, will it be fully rated at 42,000 Short Circuit Current Rating (SCCR)?

The QO112L125G Load center has a 65,000 Short Circuit Current Rating as a Main Lug Only device. The UL Short circuit current rating depends on the lowest interrupting rating of circuit breaker installed. As long as all the breakers installed are rated 42,000, then the load center will be fully rated at 42,000.

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