I was wondering if there is a code for the amount of distance between supports for 6awg bare copper in a residential setting. I was running ground wire from the panel to the cold water meter in a basement and a journeyman I work with told me it has to be supported every 24". I've never heard of this rule and after spending some time looking in the code book and online I cant find any current codes requiring it to be supported every 24". Any information on this subject would be very helpful, thank you.