Depends on the size of the service. 100 amp service will require 3 gauge, 150 amp service will require 1/0 gauge, and 200 amp service will require 3/0 gauge.
At the service entrance you will need AWG 1/0 gauge.
As a service entrance wire you need AWG # 3/0 gauge copper.
Service entrance wire should be AWG #3 copper.
I would recommend you use 1/0 gauge
The size of the wire is stated by its gauge under American Wire Gauge. Six gauge wire is size 6 AWG.
At the service entrance you will need AWG 1/0 gauge.
As a service entrance wire you need AWG # 3/0 gauge copper.
bed
Service entrance wire should be AWG #3 copper.
A #14 copper conductor is rated at 15 amps.
14-2
Service Entrance Conductors.
200 amp service entrance wire should be AWG # 2/0 copper or 4/0 aluminum.
I would recommend you use 1/0 gauge
10 AWG.
10 gauge wire will only run up to 30 amps
Use AWG #1 copper service entrance wire and #4 copper ground wire.