Motor,
I don't think so. You have the grounded conductors in parallelwith the grounding electrode conductor. The current will divide in inverse proportion to the impedance of the different conductors. The current will be shared among the grounded conductors in the same manner. There shouldn't be enough difference in the impedances of the grounded conductors to have any of them overloaded.
Have you evr checked the current on all of the different conductors that are in parallel?
Don(resqcapt19)
