Earthing and Neutral wire are both at the same potential. These two wires at 0 volts.
- Neutral is the return path for an AC circuit that carries current in normal condition. This current could be primarily because of the phase current imbalance. The magnitude of this current is a fraction of phase current or in a few cases even double of the phase currents.
- Earth, also known as a ground, is used for safety concerns against leakage or residual currents in the system.
While phase and neutral are connected to main power wiring, the earth is connected to the body of equipment that doesn’t carry current in normal conditions but in case of any insulation failure, is supposed to carry some minor current.