I would run 1/0 gauge.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
2 copper
A #3 copper wire with an insulation factor of 75 and 90 degrees C is rated at 100 and 105 amps respectively.
AWG # 4 copper.
40-100 or so
The recommended copper wire size for a 100 amp service is typically 3 AWG (American Wire Gauge).
For a 100 amp service, it is recommended to use aluminum wire that is at least 2 AWG in size.
The recommended wire size for a 100 amp aluminum service is typically 2 AWG (American Wire Gauge).
0 or if it a main breaker in a service entrance you can go down to #2 <<>> A #3 copper wire with an insulation factor of 75 or 90 degrees C is rated at 100 and 105 amps respectively.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
For a 100 amp service in copper, a wire size of 3/0 AWG should be used.
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
Copper wire is recommended for a 100 amp service due to its higher conductivity and lower resistance compared to aluminum wire.
For a 100 amp service installation, you should use a type of direct burial wire called "Type UF-B" wire.
A 100 amp service will supply your electrical current needs UP TO 100 amps.When doing load calculations on a 100 amp panel it can only be loaded up to 80 amps.
For a 100 amp service over a distance of 100 feet, the recommended wire size is typically 2 AWG copper or 1/0 AWG aluminum.