How much current carrying in neutral?

Answer 1

In the US , for example, the live wire changes from zero to +120 volts rms, then back to zero, then to -120 volts rms, then back to zero. It goes through that cycle 60 times every second. At all times throughout each cycle, the live wire "feeds" the current at the varying voltage and the neutral wire "returns" it to the power source.

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A neutral wire is always needed as the return path back to the power station for any single-phase circuit in which a single live wire feeds alternating current into the connected load.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

Answer 2

The current through neutral in single phase will be exactly balanced by the current on hot, unless the load is a hot to hot load, in which case the current through neutral will be zero.

In the case of a partial load on neutral, such as a clothes dryer, where the heating element is hot to not, and the motor is hot to neutral, the neutral current will represent only the current of the motor and, of course, the associated 120V timer controls.

In the more global sense, the various loads are divided up between the hots so that they balance one another, making the net current on neutral very close to zero. This is even true in three phase power, and it becomes more and more true, the closer and closer you get to the substation.

Answer 3

the difference between the two line currents - anything from zero (no neutral current ) if perfectly balanced or only line-to line loads up to the entire line current if completely unbalanced (all current on one line and neutral, no current in other line).

Answer 4

in neutral wire is current carrying imbalance load,or load is not proparly handle by live wire,in case earthing resistance high compare with load equipment.

Answer

For a single-phase system, the neutral conductor carries exactly the same current as the line conductor. For a three-phase system, the neutral conductor carries the phasor-sum of the three line currents; for a balanced three-phase load, the phasor sum of the line currents is zero.

Answer 5

The current is based on the load amperage rating. This is true regardless of single or three phase or voltages.