Grounding question

[nix85]

i been watching rimstar's video on grounding/earthing

https://www.youtube.com/watch?v=zLW_7TPf310

as you know, ground wire is there so in case insulation on phase/live gets damaged and it touches the casing, electricity doesn't flow through you to the ground by through the ground wire which is connected to the neutral in the breaker panel.

what i don't understand, why not connect the neutral to the casing directly and lose the 3rd terminal.

what would be the difference. casing would still be at 0V and in case phase touches the casing current will flow to the neutral and not through you.

can anyone answer this

[fritznien]

 the difference? Suppose the neutral opens then what?the case rises to the hot and you get zapped good.

[nix85]

"Suppose the neutral opens" what you mean

i said why not connect casing directly to neutral, instead of connecting it to "ground" which connects to neutral in breaker box

[Paul-R]

the difference? Suppose the neutral opens then what?the case rises to the hot and you get zapped good.

Isn't that the story of Keith Relf?
Sometimes, there is a leak which goes round and round, causing
mains hum. If you cut the earth, it breaks the circle and the hum
goes away - but there is still a leak - and once the mike stand ended
up at mains voltage. I may be mixing up a couple of cases but Fritznien
is right. Don't do it.(p.s. please post smaller images, 800 max. it messes up the thread).

[nix85]

still no answer why not connect the casing directly to neutral