Yes, ground and neutral are connected to each other AT THE MAIN (CENTRAL) FUSE BOX only. No connection should be made at additional sub-panels.In AC power supply, there are two symbols L and N. N is Neutral while L is Live or Line?
N is Neutral: Does it mean this wire is connected to ground and so it always 0V compared to ground.
L is Live or Line: what does it mean?
Thanks!
That is a little misleading as the Neutral should also carry the same current.and Line (L) it Carry current. it is also called hot line.
Neutral is typically clamped to earth either where the cable enters the house or at the local substation.In AC power supply, there are two symbols L and N. N is Neutral while L is Live or Line?
N is Neutral: Does it mean this wire is connected to ground and so it always 0V compared to ground.
L is Live or Line: what does it mean?
Thanks!
A better way of saying this is that Live (line) carries the AC 120 volts relative to the Neutral(which is connected to Earth in the main panel)....
Live (line) carries the AC 120 volts relative to the ground.
Most modern ELCB protection doesn't actually sense fault current in the earth return - it compares current going out on the live with what makes it back via the neutral, obviously if the two are not equal; some of the current is going somewhere it shouldn't.There is a local connection between neutral and ground. Ground itself can be made by pounding an 8 foot rod into the earth. Neutral is then connected to this line thru the ground wire in one and only one place, such as your main breaker box.
When you encounter a connection (such as the outlet MikeML pictured) the neutral may have a different potential than the ground as there is a real resistance in the cable, so if something is drawing current you will see that.
Neutral and line and NOT interchangeable for safety reasons. In that socket pictured the neutral is always the larger of the two slots. That is for at least three reasons: it is the standard connection, with one tab larger it cannot be inserted backwards, and it is larger so the "safer" tab is the easiest one to touch with your finger.
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And many that are not so modern, I saw this over 40yrs ago.Most modern ELCB protection doesn't actually sense fault current in the earth return - it compares current going out on the live with what makes it back via the neutral, obviously if the two are not equal; some of the current is going somewhere it shouldn't.
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I guess so!!Swapping the neutral and earth will trip the ELCB every time.
It's larger not because that somehow makes it easier to touch with your finger, it's larger because that means that the neutral physically cannot be inserted into the line socket even if the other pin is bend or broken off entirely.Neutral and line and NOT interchangeable for safety reasons. In that socket pictured the neutral is always the larger of the two slots. That is for at least three reasons: it is the standard connection, with one tab larger it cannot be inserted backwards, and it is larger so the "safer" tab is the easiest one to touch with your finger.
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