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#97171 01/30/06 02:01 AM
Joined: Jul 2004
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Alan, the only thing we really figured out on the rebar issue was that nobody could find a rebar listed acorn. There are plenty of 2 part clamps that are rebar rated.
As long as the rebar is not in a corrosive location and it remains accessible I really do not see the problem with this type of connection


Greg Fretwell
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#97172 01/30/06 09:03 AM
Joined: Jan 2004
Posts: 1,507
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Greg- Galvan makes an "acorn" clamp listed for rebar, direct burial in concrete or earth.


George Little
#97173 01/30/06 02:16 PM
Joined: Jul 2004
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Thanks George. I was sure someone showed me one but I couldn't track it down.


Greg Fretwell
#97174 01/31/06 05:22 PM
Joined: Aug 2003
Posts: 64
E
Member
oops.. let me try again

[This message has been edited by eprice (edited 01-31-2006).]

#97175 01/31/06 05:59 PM
Joined: Aug 2003
Posts: 64
E
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Quote
He said of course it can. I said prove it.

I doesn't work that way. If the NEC doesn't say you can't do something, then you can do it. It is your responsibility to prove that he can't do it. [Linked Image]

Quote
Looks like we're back to green or bare for the GEC??

No. I'm in the camp that consideres a GEC to a grounding conductor, not a grounded conductor. But, it is not an equipment grounding conductor. Therefore, there is no code section that requires it to be any particular color. It can not be white according to section 200.7. It can not be a color that would cause confusion with an ungrounded conductor per 310.12.

Try this one. Those of you who would consider the GEC to be a grounded conductor can not install a grounded electrical system. According to definition, a grounded conductor is a system or circuit conductor. The GEC is not a circuit conductor, therefore it must be a "grounded system conductor". 200.6 requires it to be marked with white or gray since it is a grounded conductor. 200.7 prohibits it from being marked by any of those means since it is not a "grounded circuit conductor". Therefore, it can not be installed [Linked Image]

#97176 01/31/06 10:29 PM
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Why isn't it a "circuit conductor"? It will certainly be carrying some of the unbalanced current back to the transformer if it has any contact with the earth at all.


Greg Fretwell
#97177 02/01/06 07:15 PM
Joined: Aug 2003
Posts: 64
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Quote
Why isn't it a "circuit conductor"? It will certainly be carrying some of the unbalanced current back to the transformer if it has any contact with the earth at all.

Well, I got that from winnie's premis arguing that it is a grounded conductor. But, if it is a circuit conductor, then how does it comply with 300.3(B)? or (A) for tht matter?

#97178 02/02/06 01:42 AM
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Nobody really likes to admit how much circuit current the GEC really does carry, particularly in a place where ground electrodes work well.
It is certainly carrying some unbalanced current.


Greg Fretwell
#97179 02/03/06 06:21 PM
Joined: Aug 2003
Posts: 64
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Member
Quote
Nobody really likes to admit how much circuit current the GEC really does carry, particularly in a place where ground electrodes work well.
It is certainly carrying some unbalanced current.

I agree

#97180 02/03/06 06:39 PM
Joined: Dec 2004
Posts: 1,064
D
Member
BE nice here..

Do all GEC's normally carry current?

I am having a hard time visualizing how a GEC off a SDS 480x208 in a plant would carry current.

Help?

Dnk...

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