I am having a trouble understanding the concept of line to ground faults,and ground in general.
In this simple single phase circuit, does current reach the load and the circuit operates normally? Line touches ground, and neutral is not earthed.
According to what I understand, the voltage in line wire will be zero and voltage source will make neutral wire voltage oscillate between +220 v and -220 v relative to voltage of line wire, and so, the circuit will operate normally.
Does this mean that line to ground fault does not happen in case of unearthed neutral?
In my understanding, when line to ground fault happens, huge short circuit current flows, and that only makes sense if the neutral is earthed because then the line wire and neutral wire will have equal voltages and that,somehow, equates a short circuit across the load, like this:
However is the ground really considered a single node, circuits wise, for us to say that circuits 2 and 3 are the same?
And according to what I researched, line to ground fault can happen even if the neutral is not earthed, how so?
So, in summary, my question(s):
1- Will circuit 1 operate normally? if no, why not?
2- Are circuits 2 and 3 equivalent? how?
3- Can line to ground fault occur in unearthed neutral? if yes, how?