Hi,
Thanks for the replies. Then, according to what is being said here, if it is IN a separate building ALL sub panels require a ground rod. (does that include ON a separate building or structure? If not then I digress.) If it does include ON what will you support the panel with? When you put a screw through the hole of the panel you are attaching it to a structure. Even if you mount it on unistrut or treated post it is a STRUCTURE.
Another thing, I am not clear on what you mean by the following statement "For the GEC, the NEC gives a minimum size of #6". Looking at the 2002 NEC Table 250.66 you are allowed to use #8 as the minimum for the GEC. You are not required to use anything larger than a #6 copper for a driven rod. Is that what you were talking about or did I misunderstand your statement.
Looking at Stallcups Electrical Design Book, I have to disagree with the statement that the ground rod is used soley for lightning protection. The electrical system will not function properly without it as a whole.
250.32 covers two or more buildings or structures fed from a common service. 250.50 covers the requirements.
It is a myth that electricity always seeks the least path of resistance to ground.
Thanks again for the comments.
Regards
Greg
[This message has been edited by mustangelectric (edited 01-29-2005).]
