Concrete encased electrode

[Hendrix]

Can this be a "substitute" for gnd. rods?

 

[iwire]

Can this be a "substitute" for gnd. rods?

If you have a building with a concrete encased electrode that can be all that is required. Of course if it has a metal water service you would have to use that as well.

 

[Hendrix]

If you have a building with a concrete encased electrode that can be all that is required. Of course if it has a metal water service you would have to use that as well.

"can be" or "is"

 

[Gregg Harris]

"can be" or "is"

Can be unless others are available, then they must be tied together

 

[north star]

= $ =

Hendrix,

In agreement with the other esteemed Forum contributors,
"yes" CEE's can be a substitute for grnd. rods, and as
**Gregg Harris** stated, ...if there are multiple,
approved type of grounding electrodes present at a site,
then they must all be bonded together [ RE: Article 250.50,
'08 NEC ].

= $ =

 

[iwire]

Can be unless others are available, then they must be tied together

Yes, thank you that is what I meant.

 

[kwired]

From 250 part III:

250.50 Grounding Electrode System.

All grounding electrodes as described in 250.52(A)(1) through (A)(7) that are present at each building or structure served shall be bonded together to form the grounding electrode system. Where none of these grounding electrodes exist, one or more of the grounding electrodes specified in 250.52(A)(4) through(A)(8) shall be installed and used.

250.52 Grounding Electrodes.

(A) Electrodes Permitted for Grounding.

(1) Metal Underground Water Pipe.

(2) Metal Frame of the Building or Structure.
(3) Concrete-Encased Electrode. A concrete-encased electrode shall consist of at least 6.0 m (20 ft) of either (1) or (2):
(4) Ground Ring.
(5) Rod and Pipe Electrodes.
(6) Other Listed Electrodes.
(7) Plate Electrodes.
(8) Other Local Metal Underground Systems or Structures.

Note only section titles was quoted here

If items 1 through 7 are present you must use them. Items 4 through 7 are typically only present if one intentionally places them to use an an electrode. Items 1 through 3 are either there or they are not as they relate to other parts of the installation. If none of 1 through 7 exist already then you must install at least one of the items 4 through 8.

 

[steve66]

= $ =

if there are multiple,
approved type of grounding electrodes present at a site,
then they must all be bonded together [ RE: Article 250.50,
'08 NEC ].

= $ =

So if you have a ground rod on the truck, does that mean it's "present" and you have to use it

Since "present" isn't specifically defined, an AHJ could possibly interpert it that way.


Steve

 

[Gregg Harris]

So if you have a ground rod on the truck, does that mean it's "present" and you have to use it

Since "present" isn't specifically defined, an AHJ could possibly interpert it that way.


Steve

"Present" as present in the installed system. I do not believe or could possibly conceive that an AHJ would even consider your thought pattern.

 

[kwired]

"Present" as present in the installed system. I do not believe or could possibly conceive that an AHJ would even consider your thought pattern.

But some idiot somewhere will think an abandoned ground rod still in the dirt from a previous installation needs to be connected because it is "present"

 

[Gregg Harris]

But some idiot somewhere will think an abandoned ground rod still in the dirt from a previous installation needs to be connected because it is "present"

I could see that happening.

 

[infinity]

But some idiot somewhere will think an abandoned ground rod still in the dirt from a previous installation needs to be connected because it is "present"

Dig down 2" and cut an inch off. Now it's no longer an electrode. :roll:

 

[Hendrix]

Dig down 2" and cut an inch off. Now it's no longer an electrode. :roll:

What if it's a 10' rod :lol:

 

[ggunn]

What if it's a 10' rod :lol:

Cover up the end with dirt.

 

[kwired]

What if it's a 10' rod :lol:

Make inspector verify it is indeed 10 feet long. If he pulls it out to do so, thank him and tell him it is no longer "present".:lol: