Grounding generator frame

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LUIS FERNANDEZ

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Is there any code requirement for the size of the grounding cable from the generator frame to a grounding rod in a non-separately derived system
 
If the generator qualified as a structure and a grounding electrode conductor was required, the size of the conductor would follow the rules in article 250.66.
 
250.34 covers portable generators and there is no requirement for a grounding electrode there.
250.35 and 250.35 B covers Permanently Installed Gens and there appears to me to be no requirement for a GE either but there is a requirement for an equipment bonding jumper sized according to 250.102 (c).

I just had this in class last night so we better wait for some other responses..
 
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