How many concrete encased electrodes?

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ga77

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Is one concrete encased electrode sufficient or do ALL concrete encased electrodes that are installed need to be bonded to the grounding electrode conductor (GEC)?
 
Re: How many concrete encased electrodes?

I'd say 250.50 is requiring all grounding electrodes present to be used. How does a structure end up with several of these?
 
Re: How many concrete encased electrodes?

Originally posted by georgestolz:
I'd say 250.50 is requiring all grounding electrodes present to be used. How does a structure end up with several of these?
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Footings for interior structural columns may be isolated from the perimeter foundation and could possibly contain 20' of rebar (greater than 5'square).
 
Re: How many concrete encased electrodes?

Any isolated item (i.e.)column,can be bonded to any portion of the Grounding System via a bonding jumper. One CCE meets NEC.

frank
 
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