3 Phase AC: It comprises of R Y B lines, alongside one impartial and one ground wire.
In the event that 3 stage load is adjusted, and furthermore on the off chance that the generator framework is impeccably adjusted, at that point EQUAL current courses through every one of the 3 wires and NO CURRENT moves through the unbiased line. If there should arise an occurrence of lopsided n/w the unbiased current won't be zero. In any case, in all the cases no present moves through the ground wire.
For 1 Phase AC :
Association is taken from one of 3 Line wires (R/Y/B) and unbiased wire and ground wire. Return way will be impartial wire. (Here the subject of adjusted or uneven doesn't emerge.)
Just if there should be an occurrence of the issue, current moves through earth wire , in any case, no present courses through ground.
Note that Return way is unique and ground wire is extraordinary.
On the off chance that no ground wire is given and sadly flaw happens ,, at that point at the terminal of deficiency there will be substantial flows moving through the issue impedance which caused the issue. Its perilous henceforth ground wire must be given. Whenever disregarded then it can cause demise of the workforce also.