Ground to Neutral voltage

[vern weedman]

Is there a standard for ground to neutral voltage taken at a receptacle on a 120v branch circuit? I've heard it should be 2 volts or less.

 

[don_resqcapt19]

Re: Ground to Neutral voltage

In a correctly installed system the grounded (neutral) to grounding conductor voltage is a measurement of the voltage drop on the grounded conductor between the main bonding jumper and the point where the voltage is being measured. Since one half of the circuit voltage drop is on the grounded conductor, the 2 volt neutral to grounding conductor voltage represents a 3.3% voltage drop on that circuit (assuming a 120 volt circuit).
Don

[ August 20, 2003, 03:36 PM: Message edited by: don_resqcapt19 ]

 

[dereckbc]

Re: Ground to Neutral voltage

Don answered correctly. Just remember the voltage will be a product of I*R. If there is little or no current the voltage will be close to 0. If there is a large load it can go to several volts say 3 to 4.