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#4602 - 10/05/01 07:17 PM panel  
stan  Offline
Joined: Aug 2001
Posts: 37
I was hooking up a ground wire in a panel and i seen a small spark when i touched it to the ground bar also i was tightning the screws on the neautral bar and my screwdriver touched the side of the panel and made a big spark is this normal??

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#4603 - 10/05/01 07:39 PM Re: panel  

If your ground is bonded to the box and your neutral and ground are bonded somewhere in the service, then there can be no spark between the neutral bar and the box.

A ground which sparks is energized. That indicates a short, malfunction, or miswiring.

None of what you describe is normal.

#4604 - 10/08/01 02:17 PM Re: panel  
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
Was this in the main panel or a sub-panel? There may be a small arc between the grounding and grounded conductor in a sub-panel due to the voltage drop that will occur in the grounded conductor?


#4605 - 10/08/01 02:18 PM Re: panel  
sparky  Offline
Joined: Oct 2000
Posts: 5,308
said ground wire may be acting as a parrallel nuetral
[Linked Image]

#4606 - 10/08/01 09:28 PM Re: panel  
stan  Offline
Joined: Aug 2001
Posts: 37
it is in the main panel inside the home

#4607 - 10/09/01 09:27 AM Re: panel  
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
Does this panel have a main bonding jumper?


#4608 - 10/09/01 11:12 AM Re: panel  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA
How old is the house? Where does the circuit you are working on go to? Was the dryer running when you were doing this?

#4609 - 10/14/01 08:38 PM Re: panel  
bordew  Offline
Joined: Aug 2001
Posts: 142
Vienna,Ohio, USA
This is not unusual, you created another path to ground. The Neutral and a ground share the current back to the transformer. Because the neutral has significantly lower resistance that the ground it will carry the bulk of the current say from 90-95 % of the current but by connecting a ground to the neutral bar it just ccreated another path.

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