What's makes up a grounding electrode system?
Then is an EGC apart of this sytem? If not, explain how it isn't?

tkrussell

What an odd question,coming from an electrician that answers questions here.

Are you taking a code update test?

What is your opinion of the EGC (Equipment Grounding Conductor) ?

I think i gave you a clue on that.

As far as the the grounding electrode system, this will differ between residential and other than residential, so which are you referring to?

stanfortyman

I could type and cut & paste for an hour, but I don't want to.
I'm curious too. What is this all about? Is it just for the education of the posters? Or is this some sort of trick question?


What is the system? Read NEC 250.50, the GES can be almost nothing, or it can be elaborate.

An EGC is NOT part of the GES. They serve two TOTALLY different purposes.

Here is a quick C&P:

GES

(1) Electrical System Grounding Electrical systems that are grounded shall be connected to earth in a manner that will limit the voltage imposed by lightning, line surges, or unintentional contact with higher-voltage lines and that will stabilize the voltage to earth during normal operation.

(2) Grounding of Electrical Equipment Non–current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected to earth so as to limit the voltage to ground on these materials.




EGC


(3) Bonding of Electrical Equipment Non–current-carrying conductive materials enclosing electrical conductors or equipment, or forming part of such equipment, shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path.

(4) Bonding of Electrically Conductive Materials and Other Equipment Electrically conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path.

(5) Effective Ground-Fault Current Path Electrical equipment and wiring and other electrically conductive material likely to become energized shall be installed in a manner that creates a permanent, low-impedance circuit facilitating the operation of the overcurrent device or ground detector for high-impedance grounded systems. It shall be capable of safely carrying the maximum ground-fault current likely to be imposed on it from any point on the wiring system where a ground fault may occur to the electrical supply source. The earth shall not be considered as an effective ground-fault current path.

stanfortyman

I'm curious. What do you mean by this?
The only real difference is that a commercial or industrial application will use more or different electrodes, such as building steel.

Washington1

I find it odd that you question my intelligence!?

Enough said!

donf

Wash,

I understand the part about questioning your question. TK and Stan would not expect such a question from you. It's to basic.

I don't see any one questioning your intelligence, we all know you are reasonably intelligent!

stanfortyman

Wash,
Are you going to clue us in as to why you asked this?

Washington1

What does this mean!!!!? Reasonably intelligent to me means: fairly good
Basic for who? I can agree it's basic for me, but would you say it's basic for you?
It's a known fact that many (including professionals in the trade) struggle with bonding and grounding. Many can't explain the difference between grounding, and grounded. Many can't give a example of a bonding jumper. Many can't tell you how to have an effective path for fault currents, or tell you which section to look at--to size the equipment bonding jumper for a separately derived system, and OC device enclosure............etc etc..




I was hoping I could spark some intellectual conversation---while intriguing the want-to-be electrician. Guess Not!!

stanfortyman

I guess I misread your post then. Sorry.

It's just the average DIY wont know what a "grounding electrode system" or an "EGC" is.

Maybe if you asked in a little more layman's language we would have read it differently.

Washington1

True!

Yet, you do have some persons on here that are well aware of knowing how to research questions asked!