Neutral Wire Voltage

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Neutral wire voltage. The voltage of the neutral conductor is only nominally 0 volts i e zero volts in name only if the guage of the wire is heavy enough then the voltage difference from one end to the other won t be enough to matter as far as. In contrast the ground wire is connected to any metal parts in an appliance such as a microwave oven or coffee pot. So me and my jman got into a hr box with 2 circuits. It s completely irrelevant to this result if the neutral wire is at 0v with respect to ground.

He turned off the breakers and undid the joints. Neutral conductors are usually insulated for the same voltage as the line conductors with interesting exceptions. Any plugged in and turned on device for example a light bulb makes a connection between the hot and the neutral. This is a safety feature in case the hot or neutral wires somehow come in contact with metal parts.

Jump to latest follow 1 20 of 27 posts. The neutral wire is defined to be 0v. Voltage on neutral wire. All neutral wires of the same earthed grounded electrical system should have the same electrical potential because they are all connected through the system ground.

Lets say you have an incandescent light bulb in a. 120 volts on a neutral wire note. If the neutral is disconnected anywhere between the light bulb and the panel then the neutral from the light to the point of the break in the neutral will become hot and the device will be unpowered because no. In this case both sides of the light hot and neutral are the same thus no potential difference voltage and the bulb does not light up.

Endgroup alfred centauri oct 17 18 at 14 37. If the wire is not a superconductor then the voltage must be different at every point along the length of the wire while current is flowing. There was a load on the neutral when he undid the joint. But because the three phases are 120 deg out of phase compared to each other this results in a voltage difference of 115v sqrt 3 200v or 230v sqrt 3 400v between any two phases.

Even though this question lacks a lot of information such as what are you testing and how you are testing it however i will explain a few situations where you are sure to get a 120 volt reading on a neutral wire. This enables current to flow through the light bulb and power it. I put my ticker in the box and was picking up voltage on the neutral. Voltage on neutral wire.

But you do if you are grounded and then touch the white wire. Discussion starter 1 may 20 2014. In a normal situation with the neutral path intact you would have 120 volts measured from across the light bulb or the receptacle. If a resistor is placed across the live and neutral wires the voltage across the resistor is alternating and thus the current through the resistor is alternating.

And each phase individually has a voltage relative to neutral of 115v if you are in the us and 230v if you are in most of europe.