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For a 125 amp service, a ground wire size of 8 AWG copper or 6 AWG aluminum is typically sufficient. However, it's important to consult with local electrical codes and regulations to ensure compliance with specific requirements in your area.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
Wire size is based on the amperage capacity of the service it is feeding. You tell me the service amps and I can tell you the wire size.
For a 70kW 240V single phase generator, you would typically use a wire size of 3/0 AWG copper wire. This size wire is rated to handle the current carrying capacity required for a generator of that size to ensure safe and efficient operation. Be sure to consult with a professional electrician to confirm the correct wire size for your specific installation.
For a 125 amp panel, you would typically use #1 AWG copper wire or #2 AWG aluminum wire for the main service entrance conductors. It's important to consult local electrical codes and a qualified electrician to ensure the correct wire size for your specific situation.
For a 125 amp sub panel located less than 200 feet away from a 200 amp panel, you would typically use a 2 AWG copper wire or 1/0 AWG aluminum wire to safely carry the current load. It's important to follow local electrical codes and regulations when selecting the wire size.