....So the topic of KAIC for control panels has been spoken about at length here, with the general consensus seeming to be that there's no way to accurately determine what the worst case fault might be. This is generally due to the myriad components used in a typical industrial control panel creating an astronomical number of possibilities for an arc flash to occur.
With that in mind, my question is regarding AFC where power distribution blocks are used right after overcurrent protection in a control panel. See the attached grainy pic for context. We know that impedance is our friend when it comes to inhibiting fault current. Is there even any way to calculate what a power distribution block would do for limiting fault current in a control cabinet, let alone justify using those calculations to determine AFC in the panel? Would you guys even recommend considering this in the calculations at all?
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