grounding seminar

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mikehughes8

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NC
I haven't visitied the forum in awhile. In the past I have heard great things about Mike Holt and his electrical seminars specifically where it relates to grounding and bonding. Where can I find information regarding his next seminar. I'm interested in attending?

Thanks
 
Speaking of grounding, has anyone seen or heard of the results from The National Electrical Grounding Research Project, which was due out in March? Is the report online someplace? I havn't heard anything of it lately.
 
mdshunk said:
Speaking of grounding, has anyone seen or heard of the results from The National Electrical Grounding Research Project, which was due out in March? Is the report online someplace? I havn't heard anything of it lately.
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Hope it clears up misunderstanding of what grounding is all about instead of continuing the faulty misconceptions. Read this article and tell me what you think? http://www.neca-neis.org/newsletter/report.cfm?articleID=176 Hint, second sentence.
 
macmikeman said:
Hope it clears up misunderstanding of what grounding is all about instead of continuing the faulty misconceptions. .... Hint, second sentence.
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Oh, my. I'm floored by that. I can just barely believe that such a statement came from NECA. I'm so ashamed.
 
mdshunk said:
Oh, my. I'm floored by that. I can just barely believe that such a statement came from NECA. I'm so ashamed.
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What I have been noticing is just how badly entrenched that misconception is in the thinking of those who have jurisdiction in my area. When I try to humbly re educate, I get treated to an all knowing look that says I am just an electrical contractor, who do I think I am to tell an authority that he has a wrong idea about anything electrical.
 
Here's that quote, from NECA:

"Effective earth grounds are important for both safety and performance reasons. The National Electrical Code requires low-impedance paths to ground to protect persons from shock hazard and to conduct fault currents to ground (this also insures the proper operation of overcurrent protective devices). "

Sorry to read that from an organization I generally have respect for as a standards organization.
 
I sent a note to NECA and got this response.

Dear Don:
Thanks for your comments. This article is basically a report sent out
by the Fire Protection Research Foundation, so you may want to forward
your comments to them as well. I haven't received any other feedback on
it . . .
Best, BROOKE STAUFFER
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mdshunk said:
Here's that quote, from NECA:

"Effective earth grounds are important for both safety and performance reasons. The National Electrical Code requires low-impedance paths to ground to protect persons from shock hazard and to conduct fault currents to ground (this also insures the proper operation of overcurrent protective devices). "

Sorry to read that from an organization I generally have respect for as a standards organization.
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In fairness, they are pretty close to being correct. If it had been written slightly differently...

Effective earth grounds and bonding are important for both safety and performance reasons. The National Electrical Code requires low-impedance paths to earth to protect persons from shock hazard and bonding to conduct fault currents to the neutral/earth connection at the service point to insure the proper operation of overcurrent protective devices.
 
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don_resqcapt19 said:
How does a low impedance path to earth provide shock protection?
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If you bond the Neutral Bus to the Ground Bus inside the main panel, and if you don?t also connect that point to planet Earth with a GEC and a ground rod, then there will be a continually varying voltage between your toes and your toaster.
 
charlie b said:


If you bond the Neutral Bus to the Ground Bus inside the main panel, and if you don?t also connect that point to planet Earth with a GEC and a ground rod, then there will be a continually varying voltage between your toes and your toaster.
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How is that?
 
Charlie,
If you bond the Neutral Bus to the Ground Bus inside the main panel, and if you don’t also connect that point to planet Earth with a GEC and a ground rod, then there will be a continually varying voltage between your toes and your toaster.
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That voltage will be their either way unless you are standing on top of the grounding electrode. I don't have my green book here at home but as I recall it says about 90% of the voltage will be dropped within 5' of the grounding electrode.
Don
 
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