neutral wire is a return for all the input current to flow back right? so how can that be equal to ground,when ground actually implies no charge at all?
-
"current flowing in it is almost equal to ground" is a meaningless statement, sorry.
Ground is a voltage reference point, current is a flow of charge, totally different things.
.
Ground is a voltage reference point, current is a flow of charge, totally different things.
.
-
Not "charge", it is about VOLTAGE.
The neutral wire has the same voltage as the ground, but the neutral wire is intended to carry current. The ground wire is not intended to carry current under ordinary circumstances, but is put in as a safety feature.
Ground and neutral are exclusively connected at one place on each site: the service main panelboard. NOWHERE ELSE, otherwise it is a code violation (despite not actually causing much problems). The reason being is that multiple neutral-ground ties yield a current sharing of ground and neutral.
There is some voltage in the neutral, but it is nearly nothing. It is only enough to overcome the resistive losses of the wire.
Water analogy:
Live wire : supply plumbing
Neutral wire : drainage plumbing
Ground wire : floor drain
The neutral wire has the same voltage as the ground, but the neutral wire is intended to carry current. The ground wire is not intended to carry current under ordinary circumstances, but is put in as a safety feature.
Ground and neutral are exclusively connected at one place on each site: the service main panelboard. NOWHERE ELSE, otherwise it is a code violation (despite not actually causing much problems). The reason being is that multiple neutral-ground ties yield a current sharing of ground and neutral.
There is some voltage in the neutral, but it is nearly nothing. It is only enough to overcome the resistive losses of the wire.
Water analogy:
Live wire : supply plumbing
Neutral wire : drainage plumbing
Ground wire : floor drain