This is a voltage drop question. A voltage at 30 amps needs to be stated to answer the question.
10 AWG in copper.
55 amps on copper wire.
Need to know the wire size.
A #6 copper wire with an insulation factor of 75 or 90 degree C is rated at 65 amps.
A #8 copper wire with an insulation rated at 75 or 90 degrees C is rated at 45 amps.
#6 awg copper
AWG # 6 copper
10 amps
10 AWG in copper.
55 amps on copper wire.
Need to know the wire size.
A #6 copper wire with an insulation factor of 75 or 90 degree C is rated at 65 amps.
You will need a 40 amp breaker using AWG # 8 wire running it a distance of no more than 50 feet.
A #8 copper wire with an insulation rated at 75 or 90 degrees C is rated at 45 amps.
10 gauge
Use the Related Link Website. At the same website check out wire size calculator. You need a #8 wire to get a full 30 load at 100 feet.
As a service entrance wire you need AWG # 3/0 gauge copper.