In this schematic there is two potential transformers on the left and two current transformers on the right. The potential transformers on the left are connected together by a wire between X2 of the left transformer and X1 of the right transformer. Then there is a wire that must come from one of these two transformers to the test switch location that also has a ground connected to it. My first question on this is, does the wire that connects these two ends of the transformer to the switch have to be connected to X2 in that part or can it be connected to the X2 or X1 of those two directly connected terminals? I ask because I notice that the schematic rearranged the way that the current transformers on the right are oriented so that the X2 wires that are going to the switch will also be grounded. Althought they are not connected in series with each other like the left ones are. My second question is, are the potential and current coils connected at the tops past the switch so much less resistant than the earth ground that an earth ground can be connected in this way without causing a short? Will only excessive current go to ground? And under what kind of conditions will current decide to go to ground?