And at a warp of phases - on "zero" [and connected c the potential will be it earth contact], easily can pinch from time to time.
It if is concerning what on zero (and the earthen contact connected to it) there will be a potential. That is if in apartment there will be where that a "real" earth and if there will be a sufficient warp which in normal operating conditions is not enough for "". There the difference will be 10, well a maximum of 20 volt, and that the last variant not for apartment, and for the private house and long .
Only in case of failure (.. Or a zero breakaway) the difference will be sufficient to note it "to the touch". In all other cases the warp, and impulse and network filters will be guilty not
Yes, beat. But the person thus stood not on a transiting moreover grounded explorer. So did not kill.
But I once again want to mark that in this case the instrument (the PC or a switch not very well) will not work. Because if a phase on earthen contact on a supply there will be a zero and the earth. And only if the connecting electrician is dangerous to associates, and he managed to connect two wires of a cable to a phase and one to zero - the instrument will work and on its case there will be a phase.
The incredible thing - is really guilty a cable. At the time of the quality symbol and a universal deficit we occasionally bought some kilometers of a sub-standard cable. At ring-up for connection it was clarified that from the different ends of an integral bay of a cable of a wire quitted different color. Found a thickening on a cable, cut exterior insulation and saw a solution . But us fairly notified that it .