The reason they do this is so we can use earth protection devices.Hello everyone!
I am an electrical engineer and I have a good knowledge of theory of circuits from theoretical point of view. I would like to learn more about safety and this is my question: why do not use neutral as a a ground wire? As far as I understand they are connected any way at a main panel. From theoretical point of view they have the same potential and if we disregard wire impedance they essentially are the same wire. I am sure that there is a reason to put so much extra copper in wiring, but what is the reason?
Thank you in advance,
Electricity suppler in the UK use 2 core cable from the transformer into the building and you connect your fuse board upto the fused side, live and neutral, your earth connects into the neutral before the fuse board. so in the UK we do use the neutral as the earth wire. we call it TN-C-S Terra ( Earth) Neutral Combined Separated.