I am installing a new 200 amp service that requires a nema 3r disco that then runs about 50 feet to the service panel. There are existing ground rods near the service panel (50 ft away from the disco) and I was wondering if I could run only three service entrance conductors (2 hots and nuetral in pvc) from the nema 3r disco to the service panel and then ground the grounded conductor at the service panel (not the first means of disconnect) to save on wire costs and installing new ground rods. Thanks in advance for any input.
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