Originally Posted By: escanlan
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Re: 2003 IRC, Table 3503.1, Note “d”
Is this is a typo in the IRC? The note states:
"Where the sole grounding electrode system is a ground rod or pipe..."
But this does not match the NEC (all versions: 1999, 2002 or 2005, section 250.66(A. The NEC requires the "sole connection" of the GEC to the GE be full size as per NEC Table 250.66 which IRC table E3503.1 was derived from.
The IRC reworded the NEC from "sole connection" to "sole grounding electrode system".
If I'm interpreting this incorrectly I could use straightening out. Also if anyone could explain the technical reason behind the drop in GEC size it would be appreciated.
Manny (Emmanuel) Scanlan
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