Asian grounding term!!!!...

[wyedelta]

Hi felows.I've read mikeholt news letter about grounding vs. bonding and I was amazed in some term.Some terms are same with what we used in the Philippine electrical code and some are different according to what I understand about the author's comment.

I want to know your definition of term base upon NEC.Sometimes I am confuse the way your term is being used in this forum.i raise this question to enlighten and perhaps I can share our term may be i will learn also by doing so.I will appreciate your response very much and thank you very much in advance.

1.Ground 2.Grounded 3.Grounding
4.Equiptment Grounding 5.System grounding
7.Neutral 8.Neutral conductor 9. ground conductor
10.current carrying conductor
11. Non-current carrying conductor
12.earthed 13. bonding
13.Grounding rod 14.grounding plate

WHAT IS THE MINIMUM RESISTANCE REQUIRED FOR GOOD GROUNDING ROD (GROUNDING ELECTRODE)?

WHAT IS THE MINIMUM DISTANCE OF GROUNDING ROD AND NO. OF GROUNDING ROD IF THE MINIMUM RESISTANCE CAN'T BE ATTAIN BY ONE ROD?

Let me give you our definition of term according to my own words and not by words-by-words on the book.I don't have the copy of PEC so I will just give it to you the way I understand. In your defintion you can write words-by-words or by your own words.Thanks once again.

We have two types of grounding:
1.Equiptment Grounding-non-current carrying conductor is being grounded(earthed) examples are motor frame,panel casing,metal plates of eqiptment or appliances.
2.System Grounding - current caryying conductor is being grounded. Examples: Xo of the transformer
the neutral conductor.
4.Current carrying conductor this is a conductor intended to carry current( ex. neutral conductor which carry the unbalance current in Wye transformer.)
5.Non current carrying conductor this is a conductor which is not intended to carry current in normal condition however in the event of ground fault, this conductor will carry the fault current.
6.Ground - this mean the ground conductor itself.
7.Grounded- intentionally or accindentally connected to earth.
7.Grounding-this mean the device or method like grounding fault interupter/grounding rod.
8.Neutral - the mid point of balance wye trnsformer (like Xo)
9.Neutral conductor -conductor being used to connect neutral to earth.
10. Grounding rod - usually made of 1/2 inch(and above) of galvanized rod with at least 6feet long.
11. Grounding Plate -usually made of copper with specified thickness according to the computed fault current.(sometimes some metal plate which is approved according to the table on PEC)
15.Ground conductor and neutral conductor sometimes the same depending on how the conductor is being used.(neutral conductor is from transformer Xo up to meter base to grounding rod at the bottom of metter base(meter base is outside the building premeses).Ground conductor is from grounding rod/ground bus to panel board inside the premeses.(Note: grounding rod is always located outside the premese and must comply with minimum resistance to the ground.)

Residential voltage in the philippines is only 220V 1/3 phase 2 wire and 3 wire only.Some area used 2 wire with live grounded conductor.(1 insulated and 1 bare)

Your comment is higher appreciated event constructive or distructive.Thank you once again.

 

[iwire]

Re: Asian grounding term!!!!...

This will get you started.

Ground. A conducting connection, whether intentional or accidental, between an electrical circuit or equipment and the earth or to some conducting body that serves in place of the earth.

Grounded. Connected to earth or to some conducting body that serves in place of the earth.

Grounded, Effectively. Intentionally connected to earth through a ground connection or connections of sufficiently low impedance and having sufficient current-carrying capacity to prevent the buildup of voltages that may result in undue hazards to connected equipment or to persons.

Grounded Conductor. A system or circuit conductor that is intentionally grounded.

Grounding Conductor. A conductor used to connect equipment or the grounded circuit of a wiring system to a grounding electrode or electrodes.

Grounding Conductor, Equipment. The conductor used to connect the non?current-carrying metal parts of equipment, raceways, and other enclosures to the system grounded conductor, the grounding electrode conductor, or both, at the service equipment or at the source of a separately derived system.

 

[dereckbc]

Re: Asian grounding term!!!!...

wye/delta, the code is confusing with it's terminology. I am convinced it is to confuse the Russians, Chinese, Cubans, Arabs, Philippines, Hispanics, and all other ethnic communities, including mine, Scottish.

In all seriousness none of us understand why the NEC makes things so difficult with thier terminology

 

[karl riley]

Re: Asian grounding term!!!!...

Iwire, those quoted definitions once again amaze me. They do seem designed not only to confuse but to perpetuate the misunderstanding that connection to earth is the safety connection. I hope the re-wordings Mike has quoted for 2005 make the purposes of grounding and bonding clearer.

Real clarity will come only after making an effort to state the misunderstandings and then to clarify the path circuits take, that they start at a transformer and end up at the transformer, not the earth.

Karl

 

[iwire]

Re: Asian grounding term!!!!...

Originally posted by karl riley:
Iwire, those quoted definitions once again amaze me. They do seem designed not only to confuse but to perpetuate the misunderstanding that connection to earth is the safety connection.

I agree with you all the way on that Karl.

Most of them IMO are misleading particularly this one to someone just getting started in the trade.

Grounded. Connected to earth or to some conducting body that serves in place of the earth.

Don had a good proposal to change a lot of what we call "Grounding" to "bonding" I think that after the learning curve of this change we would be better off.

I think Ed from Canada would agree with that as Canada went through the same thing.

I read at this forum that the CMPs have decided to study the issue until the next code cycle. Understandable considering the code wide ramifications.

Bob