Grounding question ???

1062 Views 5 Replies 3 Participants Last post by jlmran, May 26, 2011

Bicoronal

Discussion Starter · May 25, 2011

I hope this question makes sense. I have learned much about electricity lately, alot from forums like this. I understand that the neutral bar is bonded to the ground bar in a main panel. I have also read that the power company neutral is grounded at the pole peiodically. Given this, my question is where does the current that returns to the panel via the neutral wires "go"? Does it return to the power company or just go to ground? Which has lower resistance, the earth or the path to the power company?

Thanks.

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jlmran

· #2 · May 25, 2011 (Edited)

Back to the source transformer. It's a closed loop system of sorts.

The neutral's connection to ground has no effect on function. That connection serves other purposes.

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jlmran

· #4 · May 25, 2011

mpoulton said:
That explanation is highly simplified to the point of almost being wrong, but it's an easy way to understand the general concept.

What about it is approaching the realm of wrong?

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jlmran

· #6 · May 26, 2011

mpoulton said:
Current actually goes both ways on each wire; since it's AC there's no real direction of flow. Also the current through each hot wire offsets the current on the other hot wire so only the difference between them flows in the neutral. It's otherwise accurate, and a very convenient simplification to help people understand the general idea.

With AC there IS a direction of flow...but the direction changes (alternates) rapidly. The flow still exists. The 'offsetting' flow you mention only exists in 240v or MWBC circuits. And in these scenarios the flow remains to and from the transformer. I think the original answer is spot on.

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