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#62491 - 02/16/06 11:02 PM 50 VOLTS ON GROUND  
lite bulb  Offline
Member
Joined: Feb 2006
Posts: 78
wilm,de.
I RECENTLY LOST MY COMPUTOR SERVER WHICH IS ON COMCAST WHEN COMCAST CAME OUT THEY SAID THERE WAS 45 TO 50 VOLTS ON THE GROUND WHAT WOULD CAUSE THIS, THE SERVICE HAS A WATER PIPE AND GROUND ROD GROUND AT THE MAIN AND COMCAST TAPPED OFF THE WATER PIPE.


Work Gear for Electricians and the Trades

#62492 - 02/16/06 11:29 PM Re: 50 VOLTS ON GROUND  
Tesla  Offline
Member
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
Call an electrician....

Sounds like trouble in your panel.


Tesla

#62493 - 02/16/06 11:48 PM Re: 50 VOLTS ON GROUND  
lite bulb  Offline
Member
Joined: Feb 2006
Posts: 78
wilm,de.
WHAT WOULD CAUSE THIS


#62494 - 02/17/06 12:06 AM Re: 50 VOLTS ON GROUND  
Active 1  Offline
Member
Joined: Feb 2003
Posts: 687
Grayslake IL, USA
Check the equipment ground on your caps lock. Otherwise call an electrician quickly.... And pay them to make repairs. You may have a dangerous situation that can destroy electrical items, cause shocks, or worse.


Tom


#62495 - 02/17/06 12:10 AM Re: 50 VOLTS ON GROUND  
dereckbc  Offline
Member
Joined: Oct 2003
Posts: 156
Tulsa, OK
A very common problem. It is life threatening and you should seek professional help ASAP. Sounds like you are not in the trade, so fixing it yourself is not an option.

Failure to get the issue resolved will likely cause immediate equipment failure, and possible fatal shock under the right conditions.


#62496 - 02/17/06 12:12 AM Re: 50 VOLTS ON GROUND  
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
I am curious as to what point they measured this voltage from, i.e., the reference.


Larry Fine
Fine Electric Co.
fineelectricco.com

#62497 - 02/17/06 10:02 AM Re: 50 VOLTS ON GROUND  
dereckbc  Offline
Member
Joined: Oct 2003
Posts: 156
Tulsa, OK
Larry good point. If it was between the service and coax shield guess which pot is calling the kettle black.


#62498 - 02/17/06 10:42 AM Re: 50 VOLTS ON GROUND  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I'm not clear as the two points between which the measurement was made. I assume one was at the ground on the outlet powering the server, but when you say Comcast "tapped off the water pipe" do you mean that was the reference point used?

If the water pipe is properly bonded and at ground potential, then it might just be a bad equipment ground to the receptacle in question. Or maybe it's a replacement for an older 2-wire outlet which never had a ground in the first place?


#62499 - 02/17/06 10:53 AM Re: 50 VOLTS ON GROUND  
Radar  Offline
Member
Joined: Apr 2004
Posts: 349
Los Angeles, CA
Quote
WHAT WOULD CAUSE THIS

A defect.

Call a qualified service electrician asap.


There are 10 types of people. Those who know binary, and those who don't.

#62500 - 02/17/06 06:06 PM Re: 50 VOLTS ON GROUND  
Larry Fine  Offline
Member
Joined: Feb 2005
Posts: 693
Richmond, VA
Another psooibility is that the problem is on the incoming cable shield, and not the house ground.

Cable systems have, if I'm not mistaken, 50 volts imposed on them for powering in-line equipment.

It is very possible that this damage was caused by a defect in cable-company equipment, and they are liable.


Larry Fine
Fine Electric Co.
fineelectricco.com

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