You do not use a ground wire in the connection from the meter base to the distribution panel. A bonding wire may be required if the service is using PVC conduit.
For a 200amp service you need number 4 copper
You bond the 200 amp service before you call for an electrical inspection. Without this connection the service will not pass and you will not get a connection by the utility company.
In the US you need 2/0 ("2 ought") copper for residential and 3/0 copper for commercial.
A bare #3 copper conductor is the minimum size wire to be used.
If you don't know how to do this or even what it is then call an electrician. I don't recommend doing this without proper knowledge and prior training in electrical safety.
#4 copper
According to the NEC, if the ground rod supplements another grounding electrode such as a metal water pipe, you are required 1. If the ground rod or rods is your only grounding electrode, you are required at least 2, at least 6 feet apart. Check with your local jurisdiction for local requirements.
#4 copper.
For a 200amp service you need number 4 copper
200 amp service in chicago uses 3 aught.
You bond the 200 amp service before you call for an electrical inspection. Without this connection the service will not pass and you will not get a connection by the utility company.
#6 bare copper wire.
In the US you need 2/0 ("2 ought") copper for residential and 3/0 copper for commercial.
A bare #3 copper conductor is the minimum size wire to be used.
If you don't know how to do this or even what it is then call an electrician. I don't recommend doing this without proper knowledge and prior training in electrical safety.
200amp
A #3 copper wire with insulation rating of 90 degrees C has an amperage rating of 105 amps.