Sub Station Foundation Ground

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lmhjr

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I am being told that a Traction Power Substation (for a Light Rail System) needs to have a ground wire from the slab foundation rebar or pier rebar tied to the ground mat of the substation (13.5KVA). This is in addition to the interior building halo ground system to the exterior ground mat. Is this true? And where in the NEC or NFPA codes does this requirement show up?

Thanks
 
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