Grounding question

[v8karlo]

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

Your casings and other stuff can produce lots of noise and phase shifted signals.


If you use neutral for grounding you introduce all that garbage back to network,
and soon your network will not have clean sine wave but garbage.


How many casings are just in one city?


The reason to use ground is to try to keep clean network,
and remove garbage signals to the ground.

[nix85]

Your casings and other stuff can produce lots of noise and phase shifted signals.


If you use neutral for grounding you introduce all that garbage back to network,
and soon your network will not have clean sine wave but garbage.


How many casings are just in one city?


The reason to use ground is to try to keep clean network,
and remove garbage signals to the ground.

good point, all that stray capacitance

[v8karlo]

Yes, and with stray capacitance emerge reactive power as well.
Network will become source of noise and sensitive electronics on user end will be fried very quickly,
while power companies will be having headiche.

[nix85]

ofc, like you said, phase shifting voltage and current

[nix85]

Your casings and other stuff can produce lots of noise and phase shifted signals.


If you use neutral for grounding you introduce all that garbage back to network,
and soon your network will not have clean sine wave but garbage.


How many casings are just in one city?


The reason to use ground is to try to keep clean network,
and remove garbage signals to the ground.

i been thinking about this again, this argument makes sense at first but
in most usual case where ground is connected to neutral
in the box, what is the difference, metal casings and other stuff
is still connected to the main circuit, no big difference if it's connected
right at the plug or few meters away in the box and still

"casings and other stuff can produce lots of noise and phase shifted signals"