Calling All Grounding Experts

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Speedskater

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Re: Calling All Grounding Experts
« Reply #20 on: 31 Mar 2016, 04:30 pm »
Again:
a] A regular Fluke hand meter will not accurately measure the resistance to Planet Earth. Last time I checked, the correct meters cost about $2500 and a skilled user about 1/2 do do the measurement.
b] An under 5 Ohm ground system might cost about $100,000.
c] I have no idea, what under 1 Ohm ground systems cost.
d] An isolated dedicated earth ground rod is both dangerous and illegal.
e] The connection to Planet Earth has nothing to do with day-to-day AC power quality.

jea48

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Re: Calling All Grounding Experts
« Reply #21 on: 31 Mar 2016, 04:46 pm »
A bargain then at $1800.00 Did you know you can rent meters?

http://www.ilovefluke.com/Fluke/Ground-Clamp-Meters-1630/?gclid=CIP6qLSt68sCFZA2aQodvSoG9Q

The grounding electrode system for a Grounded AC Power System has a lot to do with power quality.
As an EE you should know that.

FullRangeMan

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Re: Calling All Grounding Experts
« Reply #22 on: 31 Mar 2016, 05:11 pm »
d] An isolated dedicated earth ground rod is both dangerous and illegal.
This price you mention has no sense to me.
In what a ground rod could be illegal?
« Last Edit: 1 Apr 2016, 11:59 am by FullRangeMan »

Speedskater

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Re: Calling All Grounding Experts
« Reply #23 on: 1 Apr 2016, 01:04 am »
A bargain then at $1800.00
A bargain indeed! and it looks like the test might be a lot quicker than using old school meters.

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Did you know you can rent meters?
Even those old school meters could always be rented. But it took skill to use those meters. In any case, it won't be me doing the renting.

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The grounding electrode system for a Grounded AC Power System has a lot to do with power quality.
As an EE you should know that.
I didn't know that! And neither did any of the electrical engineering books on AC power that I have been reading.
What books should I read. All the ones in my library have it wrong.

Speedskater

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Re: Calling All Grounding Experts
« Reply #24 on: 1 Apr 2016, 01:22 am »
The traditional way is:
   
Fall-of-Potential Measurement
The Fall-of-Potential test method is used to measure the ability of an earth ground system or an individual electrode to dissipate energy from a site. 
http://www.fluke.com/fluke/inen/solutions/earthground/fall-of-potential

An electrician that does this type of testing wrote:
The clamp-on is generally not an accepted method by our customers.

jea48

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Re: Calling All Grounding Experts
« Reply #25 on: 1 Apr 2016, 03:14 am »
The traditional way is:
   
Fall-of-Potential Measurement
The Fall-of-Potential test method is used to measure the ability of an earth ground system or an individual electrode to dissipate energy from a site. 
http://www.fluke.com/fluke/inen/solutions/earthground/fall-of-potential

An electrician that does this type of testing wrote:
The clamp-on is generally not an accepted method by our customers.

I didn't recommend the Clamp on. Did you?

You need to lean to understand what you read.

jea48

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Re: Calling All Grounding Experts
« Reply #26 on: 1 Apr 2016, 04:19 am »
A bargain indeed! and it looks like the test might be a lot quicker than using old school meters.
Even those old school meters could always be rented. But it took skill to use those meters. In any case, it won't be me doing the renting.
I didn't know that! And neither did any of the electrical engineering books on AC power that I have been reading.
What books should I read. All the ones in my library have it wrong.

You know you are the one that tried to impress the readers of this thread with your great knowledge of how much things cost. You are the one that brought up how much the test equipment cost.

 The OP asked a simple question if he could use a volt meter to check for soil resistance. Some of us tried to answer his question in a manner that hopefully he understand. But not you! You are a big EE and are use to talking down to people.

I know it's tough for you, but try real hard and go back and reread the OP's original posted message. Then try real hard to follow the thread. Especially your posts.   

I let it slide when you said it would cost $100K to get a 5 ohm electrode to earth resistance reading. It don't cost that in the central Midwest! You just made that number up, right?

>>>>>


Quote
jea48 said:
The grounding electrode system for a Grounded AC Power System has a lot to do with power quality.
As an EE you should know that.
Quote
Speedskater response:
I didn't know that! And neither did any of the electrical engineering books on AC power that I have been reading.
What books should I read. All the ones in my library have it wrong.

Your ignorance is showing.


WHAT EXACTLY IS POWER QUALITY?
 http://www.p3-inc.com/images/pq_wp_2016.pdf
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IEEE 142, 4.1.2 states:
“Ground resistance should be 1 ohm for substations and 2-5 ohms for commercial and industrial services.”
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The lower the ground resistance the better.

A facility with high ground resistance is more susceptible to power quality problems than one with a low ground resistance. A high ground resistance can help induce large voltages into your electrical system causing electrical and electronic failure.

Page 10...

 What's that on the bottom of the pyramid?

GROUNDING?...... Imagine that!

//

Who is Dan Maxcy? 

http://www.momentumisbuilding.com/aspx/News.aspx?NewsID=2125&n=1258&n1=1347&n2=2137


Best regards,
Jim
« Last Edit: 1 Apr 2016, 01:53 pm by jea48 »

Folsom

Re: Calling All Grounding Experts
« Reply #27 on: 1 Apr 2016, 04:27 am »
Jim, as much as I'm enjoying you debating with stone-cold-Kevin, why don't you keep it civil please.

jea48

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Re: Calling All Grounding Experts
« Reply #28 on: 1 Apr 2016, 04:49 am »
Jim, as much as I'm enjoying you debating with stone-cold-Kevin, why don't you keep it civil please.

Will do.

Speedskater

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Re: Calling All Grounding Experts
« Reply #29 on: 1 Apr 2016, 03:38 pm »
I didn't recommend the Clamp on. Did you?
You are the one that brought up clamp-on meters.
There are even less expensive meters (maybe $500) that do an OK measurement.
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You need to lean to understand what you read.
So what am I missing.