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Hi, I'm Mike G and I'll be assisting you. I need to know if the loads will both need to be protected. There are several way to wire the device.
OK, look at the back of the device. You'll see that one set of terminations are marked "Line", that is where the pair incoming with 120V go. The terminations marked "Load" is where you put the other wires on to have all protected from this device. If not required to be protected they connect with the incoming to the Line terminations. Black wires to gold screws, white wires to silver screws.