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Tool Talk Discussion Forum

Re: Basic AC Power Systems

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Dr. Walt

04-22-2013 08:03:07
12.2.223.79



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Two questions; first, does the Neutral work the same as a Ground? and second, can a Neutral be carrying Current? .




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John T

04-22-2013 11:18:24
216.249.82.117



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 Re: Basic AC Power Systems in reply to Dr. Walt, 04-22-2013 08:03:07  
NOOOOOOO The Neutral (A GrounDED Conductor) DOES NOT I REPEAT NOTTTTTTTTTT WORK SAME AS THE EQUIPMENT GroundING CONDUCTOR.

Neutral (A GrounDED Conductor) is for the normal return current.

Equipment GroundING Conducotr is for fault current ONLY NOTTTTTTT normal return current. Its there to provide a dedicated low resistance current path for fault current ONLY

John T



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David G

04-22-2013 08:33:43
204.29.138.33



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 Re: Basic AC Power Systems in reply to Dr. Walt, 04-22-2013 08:03:07  
The neutral should carry current, the ground is only for fault protection. They should be bonded together at one location.



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Dr. Walt

04-22-2013 09:49:55
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 Re: Basic AC Power Systems in reply to David G, 04-22-2013 08:33:43  
David G:

If the Neutral IS carrying Current, & as you say, the Neutral and the Ground should be bonded at one location - then wouldn't that create a DEAD SHORT ?



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John T

04-22-2013 11:26:53
216.249.82.117



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 Re: Basic AC Power Systems in reply to Dr. Walt, 04-22-2013 09:49:55  
The Neutral (A GrounDED Conductor) carries return current back from the load to the Panels Neutral Buss. The Equipment GroundING Conductor DOES NOT carry any current back from the load, ONLY fault current if a fault exists.

At the main service entrance and only there the Neutral Buss in bonded to the Equipment Ground Buss but still the equipment ground does NOT carry any current ONLY carries current if theres a fault.

PS for the poster and all here: Its IMPOSSIBLE to explain in a paragraph here what can take books to fill and years of engineering practice and experience to fully comprehend SO DONT FEEL A BIT BAD IF YOU DONT UNDERSTAND IT

John T BSEE, JD

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David G

04-22-2013 11:14:43
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 Re: Basic AC Power Systems in reply to Dr. Walt, 04-22-2013 09:49:55  
The neutral is not considered potential carrying, it should only have voltage on it caused by resistance and current referenced to ground.



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David G

04-22-2013 10:13:22
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 Re: Basic AC Power Systems in reply to Dr. Walt, 04-22-2013 09:49:55  
No, because current must have a return path. The current in the neutral is after the load.



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