10V In Between The Neutral & Earth Terminal (Death Circuit)

Death circuit? 10V?

Any other numbers?

"With the circuit dead", perhaps?

How the system is earthed?

The main earth is come from the uninterruptible power supply unit to the copper bar, all other instrument load return earth is connected to the copper bar.(load side earth connection is flowing )

OK , you have a dead circuit(de-energized) and you are getting a 10v reading from neutral to ground....then you have something on maybe? or maybe something is bleeding voltage to ground nearby? can't really troubleshoot from here....

One wouldn't expect anything else. It is simply an expression of the neutral current elsewhere in the system and the earth loop impedance, as has been expressed in this forum countless times before.

I had a multimeter that used to measure voltages with no contacts placed in any circuit!

I got to figure out the reason! sometimes they don't work so well as well.

but 10 volt´s wont kill you, but the cc current may! the neutral is likely unbalanced.

is it a 3 phase circuit?

Can you manage to measure Voltage AND Current, AND note all circumstances, AND report ALL at the same time, before asking?!?

Assuming that your ground is truly grounded with a good connection, the Neutral you have is not grounded perfectly on the upstream side. It has to be at zero volts with reference to ground if it is properly grounded. It shows that the neutral is "floating" because of unbalanced loads in the upstream side.

Also, if you are getting 10V in an isolated circuit cut off from the mains, I suspect something due to the uninterrupted power source .

Dear Mr.k2chan,

Floating Earthing Concpt appears to the probem ( as referred by Mr. Packiarall - Vide Post No.9 here) and you open the link http://electrical-engineering-portal.com and you will find solution for your problem.

Pl.post the inf. how the problem is solved.

DHAYANANDHAN.S

If there are high power lines in close proximity you can get such voltages just by EM radiation. I suppose the 10V is AC. I had measured up to 13 volts AC in such cases especially in industrial buildings with heavy machinery and train stations.

To put it differently, usually the neutral point of the supply transformer is connected to earth (sometimes through an earthing resistor). Any voltage seen at a consumer's supply point is caused by an imbalance resulting from different loads or sometimes high resistance faults which haven't cleared (the latter are rare). Fluorescent lamps also cause harmonic currents in neutral conductors. It's unusual to cal the earth connection a "Death" terminal; it's more usual to call it a "Safety" terminal.

just put 6v/5w bulb and see if it glows, I bet it won't and your 'death' volts will drop to 0V, OK, may be to 155mV. That will practically prove all the learned colleagues above tried to explain.

need a LOT more information to make a reasonable guess!!!