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Thank you for your answer john I finally! Understand :)

No I haven't done a great deal on three phase yet, thanks for all your help guys things are starting to make more sense now, was just wondering if any current flows down the neutral? The way I see it is that it would be impossible for current to flow down the neutral as there us 0v on the...

Yes thats starting to make more sense now, so there is no voltage on the neutral cable at all

I am currently doing an apprenticeship, just was trying to understand how you can have 230v down a neutral that is directly connected to earth and have no fault

Ok, so why on the installation side when earth and neutral connect there is an earth fault?

Hi andy please could you explain how neutral is 0v to earth?

Thanks for your help guys, I'm still struggling to understand how 230v neutral can be connected to earth and no fault occur? Also why wouldn't the earth become live if it's connect to 230v neutral?

Hi everyone I need some help understanding how a TN-C-S earthing system works, I am struggling to understand how the earth can be connected to neutral and no neutral to earth fault occur? Wouldn't the earth become live if connected to neutral? Please help Thanks