Very easy to install, the lock works perfectly. BUT the alternator switch mounting bracket is the wrong size for a 2 pole Square D QO switch. See attached photo, the switch opening is approximately 3/8-1/2" wider than the switch, and the "stud" that screws into the switch plate is too long for the QO130M200's plate depth. Without this mounting bracket, it will this item is NOT installed to NEC standards.
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