Support requirements for bare 4/0 run on surface.

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Wireman569

New User
Location
San Diego
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Electrician/MV Splicer
I am installing a 4/0 electrode ground on the interior surface of a 12kv vault for connecting shields and ground conductors.
I cannot find anything in the code that gives me a maximum spacing requirement for supporting a single conductor, other than “securely fastened” in regards to electrode grounding conductors.
Am I missing something here or is this really up to the interpretation of “securely fastened”?
 
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