2005 Grounding Electrode system

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Re: 2005 Grounding Electrode system

Originally posted by ryan_618:
...It was quite clear that their intent was that the concrete encased electrode is more often than not the best electrode present at a building, and therefore it was to be used...
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My first response to that would be, ?So.??

My next would be, ?Even though I agree that its an excellent grounding electrode, unless you can honestly say that its ?unsafe? to leave it unbonded- and we know that?s not so or there would be no exception ? then it?s a design issue and doesn?t belong in mandatory Code.? ?Better? and ?best? are design issues [90.(C)], not a ?necessary for safety? issue.[90.3(B)]
 
Re: 2005 Grounding Electrode system

I wired a house back in 2001 where the contractor of the subdivision builders every house with a rebar frame in the foundation and at the panel they turn up a bar at the end to extend to about 3 feet out of the pour and directly under the panel.

Now in this case EVERY house ( over 300 ) had this method of grounding vie rebar ( connected with a # 4 AWG Bare ) and that was the grounding system a well as the normal attachment to the waterpipe as well....but no ground rods needed...

In our area I am finding alot of builders doing this as a standard now...I love it as I have not driven a ground rod on that contractors jobs in over 4 years.

[ February 01, 2005, 01:45 PM: Message edited by: radiopet ]
 
Re: 2005 Grounding Electrode system

Here we have not yet adopted the 2005 change still under the 2002 code but the county has made addendums that this is one of them.For several years we attached to a stub out from the footer that was stubbed out on the service side.The footer would not be passed without it being there.Now there has to be #4 CU attached to the footer that will be encased in concrete.This gets attached to the meter (POCO here requires that the GEC be attached at the meter) not the panel.A gas bond can come from the panel but not the service ground.If cut off then 2 ground rods at least 6 ft apart will be used.
 
Re: 2005 Grounding Electrode system

Never a bad idea to agree with Don.

The "or" in 250.52.A.3 is describing two types of concrete encased electrodes, it's not saying to use one or the other.

I don't think chipping out concrete and tying into should be universally accepted. What's to stop someone with a hammer drill and one foot of #4 rebar from complying?

Clearly, this needs to be inspected before the pour or who know what you got, should be interesting...
 
Re: 2005 Grounding Electrode system

Done here no slab will pass a footer inspection without it the electrical inspectors like it the building inspector signs the uffer off and all they have to check is the connection to the service equip. Oh and the bond screw ;)
 
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