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How to determine usability of IQ Sentinel on a K frame breaker with TA402K lugs:

The IQ Sentinel can NOT be used with a K Frame breaker that has TA402K Lugs. TA402K lugs are oversized lugs that hold 500-750 MCM which require a shield. The IQ Sentinel will not fit on the load side of the K Frame Breaker with TA402K lugs.