The answer to your question is yes. You will be pulling some 3/0 guage for a 200 amp service (you growing?). The neutral / ground bus is typically grounded at the meter can or in the panel for older installs(house ground which is typically brought in with the service but separate) as well as @ the last step down transformer on the pole (the neutral/ground coming from the service is sourced here)
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neutral/ ground wires in my panel w. labelled source .this is an old house, and the single ground rod is wired directly into the panel instead of the meter box which i believe would not meet code any longer where its installed
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Bare conductor is your service ground
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This is a nice drawing to sum it all up. Svc ground and ground rod both attached to neutral/ground bus in the main cabinet.(note the right panel has separate neutral and grounding busses but they all go to the same place). Don’t skimp on wire here, you need all 4. Your panel ground should never carry current, your neutral should handle all of it.
Do you have safety gear? These gloves are only $30 and protect you up to 17000 volts. Worth every penny imo
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