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DHARAMRAJSINH
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Type of Grounding System

08/06/2014 4:24 AM

What is the basic deference between 1) Solid grounding 2) Low-resistance grounding 3) High-resistance grounding 4) Ungrounded.

Any one have detail technical notes for above type of grounding system
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PWSlack
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#1

Re: type OF GROUNDING SYSTEM

08/06/2014 4:26 AM

Wikipedia has an article on this detail.

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PeterT
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#2

Re: type OF GROUNDING SYSTEM

08/06/2014 7:20 AM

Post Glover has a lot of helpful documents that will teach you about resistance grounding in their technical library:

http://www.postglover.com/literature-library

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kvsridhar
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#3

Re: type OF GROUNDING SYSTEM

08/06/2014 8:08 AM

One more excellent paper, this one from Schneider Electric : ect172.pdf

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lyn
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#4

Re: Type of Grounding System

08/06/2014 9:27 AM

Really? You want "detail" technical notes" on ungrounded? Really?
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PWSlack
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#5
In reply to #4

Re: Type of Grounding System

08/06/2014 9:36 AM

Quick! Raise an invoice for a top-quality LynDoor™ CarteBlanche® blank paper pad shipped to the original poster's mailbox!

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lyn
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#6
In reply to #5

Re: Type of Grounding System

08/06/2014 9:45 AM

We'll have to put you on our staff.

We're looking for a fast engineer. Our present engineering staff are all half fast.
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IdeaSmith
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#10
In reply to #6

Re: Type of Grounding System

08/06/2014 8:25 PM

You should not hire Cr4P!

(cr4 Persons)

But you know that!

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lyn
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#11
In reply to #10

Re: Type of Grounding System

08/06/2014 8:39 PM

There are many here I'd hire.
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IdeaSmith
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#20
In reply to #11

Re: Type of Grounding System

08/11/2014 5:35 AM

But not the Cr4ppy ones!

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kvsridhar
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#12
In reply to #6

Re: Type of Grounding System

08/06/2014 9:20 PM

He is also a wit. Many of our staff are half- ,,,,wait a minute, did i just admir something?

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adreasler
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#15
In reply to #12

Re: Type of Grounding System

08/07/2014 9:14 AM

(tossed you a GA for the morning chuckle, better than coffee for waking up after sleep-driving to work.)

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The.Tinkerer
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#9
In reply to #4

Re: Type of Grounding System

08/06/2014 11:36 AM

Article 250.21 of the NFPA 70 (NEC) delineates the use of ungrounded systems. That would be a great technical reference.

Many appliances (utilization equipment) do not utilize a ground pin (grounding pin).

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Anonymous Poster #1
#7

Re: Type of Grounding System

08/06/2014 10:07 AM

Ohms. Ohms. Ohms.

--Maharishi Mahesh Yogi
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The.Tinkerer
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#8

Re: Type of Grounding System

08/06/2014 11:22 AM

I recommend the classic IEEE Green and Emerald books. These are a pretty solid foundation for grounding in commerical and industrial situations.

The new IEEE 3000 series may have the same information.

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old salt
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#13

Re: Type of Grounding System

08/06/2014 11:24 PM

Do you mean "Bonding and Grounding" or just "Grounding"? These are three very distinctly different procedures. Bonding; Grounding; and Bonding and Grounding.

Good Luck, Old Salt

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TonyS
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#14

Re: Type of Grounding System

08/06/2014 11:58 PM

Now let me think on this one:

"What is the basic deference between 1) Solid grounding 2) Low-resistance grounding 3) High-resistance grounding 4) Ungrounded."

1/ solidly fastened down
2/ tethered to earth by a long piece of thin elastic
3/ tethered to earth by a short piece of thick elastic
4/ unfettered, floating above the earth

"Any one have detail technical notes for above type of grounding system"

Yes thank you, I had to pay for them.

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The.Tinkerer
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#17
In reply to #14

Re: Type of Grounding System

08/07/2014 10:59 AM

"...I had to pay for them."

Or wrote them yourself!

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lyn
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#18
In reply to #17

Re: Type of Grounding System

08/07/2014 11:22 AM

Is this what you are being paid to do?

Surf the web and harass people?

You are a glowing example of a useless government employee.

GET BACK TO WORK!!!!!!!!!!!!!!!!!!!
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The.Tinkerer
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#19
In reply to #18

Re: Type of Grounding System

08/08/2014 11:47 AM

That wasn't harrassment. I was referring to some of the individuals on this forum who actually pen directives, guides, instructions, etc. on proper electrical (engineering) practices. The individual I responded to seems to fall into that category.

This is harrassment:

I am working...

...just not too hard...

How do you know my hours? I'm on Maxiflex!

(you wouldn't hit a guy with glasses, would you?)

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adreasler
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#21
In reply to #19

Re: Type of Grounding System

08/18/2014 11:29 AM

"(you wouldn't hit a guy with glasses, would you?)"

*picks up a pair of plastic-lensed glasses and bops The.Tinkerer lightly on the head with them*

Sorry the Call of the Gag was too great for me to resist. Blame Vaudeville for having too many good schticks to steal borrow.

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rashavarek
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#16

Re: Type of Grounding System

08/07/2014 9:18 AM

Answers as follows,

1. Stick fork in light socket with bare feet on ground.

2. Stick fork in light socket with bare feet in pool of water on ground.

3. Stick fork in light socket while holding hands with someone with one bare foot on ground.

4. Stick fork in light socket while floating in a pool of water.

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electricalexpert65
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#22

Re: Type of Grounding System

08/24/2014 5:42 AM

1. Solid Grounding: The system neutral is connected to ground using a negligible impedance conductor. The single-line-to-earth fault current could be as high as three phase symmetrical short circuit current.

2. Low Resistance Grounding: A low value of resistance is connected between system neutral & ground. The value of resistance is chosen such that the single-line-to-earth fault current is limited to a value of 200A to 1000A.

3. High Resistance Grounding: A high value of resistance is connected between system neutral & ground. The value of resistance is chosen such that the single-line-to-earth fault current is limited to a value of less than 10A.

4. Ungrounded: A system in which the system neutral is not intentionally connected to ground.

Detailed technical notes are so long that they cannot be posted here. Visit www.igard.com
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Users who posted comments:

adreasler (2); Anonymous Poster (1); electricalexpert65 (1); IdeaSmith (2); kvsridhar (2); lyn (4); old salt (1); PeterT (1); PWSlack (2); rashavarek (1); The.Tinkerer (4); TonyS (1)

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