1 phase 480v transformer and get a neutral?

[ActionDave]

I understand what the GEC does. I was thinking in having one on a SDS could shorten the fault current path for a fault on the secondary, depending on where the fault occurs. Is that incorrect?

If everything is connected properly the fault current path will include the GEC and the earth as a by-product but the majority of the fault will be flowing through the effective ground fault current path and straight to the secondary without even noticing if there is a GEC or not.

 

[kwired]

I understand what the GEC does. I was thinking in having one on a SDS could shorten the fault current path for a fault on the secondary, depending on where the fault occurs. Is that incorrect?

Current follows all possible paths, divides in accordance to impedance of the paths. Path of lowest impedance carries the most current. Some cases the lowest impedance path is not the EGC dedicated to the circuit in question, especially in an all metal structure or network of metal components. A GEC, or a portion of it, could at times also end up carrying more of the fault than the EGC of the circuit in question.