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A 3/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 150 amps for 150 feet on a 240 volt system. This size will allow the conductor to be loaded to 120 amps. 150 x 80% = 120 Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 150 amps then you would need to use a wire with a rating of 190 amps. 190 x 80% = 152 amps A 4/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 190 amps for 150 feet on a 240 volt system.
At the service entrance you will need AWG 1/0 gauge.
As a service entrance wire you need AWG # 3/0 gauge copper.
For that distance I would run AWG # 3 copper and install a sub-panel.
A #1 copper conductor will limit the voltage drop to 3% or less when supplying 95 amps for 200 feet on a 208 volt system. This size will allow the conductor to be loaded to 76 amps. 95 x 80% = 76 amps Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 95 amps then you would need to use a wire with a rating of 120 amps. 120 x 80% = 96 amps. A 1/0 copper conductor will limit the voltage drop to 3% or less when supplying 120 amps for 200 feet on a 208 volt system.
A 400 MCM copper conductor will limit the voltage drop to 3% or less when supplying 100 amps for 700 feet on a 240 volt system. This size will allow the conductor to be loaded to 80 amps. 100 x 80% = 80 amps. Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 100 amps then you would need to use a wire with a rating of 125 amps. 125 x 80% = 100 amps. A 600 MCM copper conductor will limit the voltage drop to 3% or less when supplying 125 amps for 700 feet on a 240 volt system.
A 3/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 150 amps for 150 feet on a 240 volt system. This size will allow the conductor to be loaded to 120 amps. 150 x 80% = 120 Conductors are only allowed to be loaded to 80% or their rated capacity. If you need the full 150 amps then you would need to use a wire with a rating of 190 amps. 190 x 80% = 152 amps A 4/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 190 amps for 150 feet on a 240 volt system.
Are you asking about home electrical service? sevrice entrance cables need to be three feet away from a window
This is a voltage drop question. A voltage at 30 amps needs to be stated to answer the question.
Assuming you are working with 240v, you need 4/0 copper conductors.
A #14 wire will do the job.
A 3/0 copper conductor with an insulation rating of 75 or 90 degrees C is rated at 200 and 210 amps respectively. A 3/0 copper conductor will limit the voltage drop to 2% or less when supplying 200 amps for 80 feet on a 240 volt system.
school busses have a bumper sticker which reads "keep back 100 feet". i do not know about city busses
#6 awg copper
At the service entrance you will need AWG 1/0 gauge.
As a service entrance wire you need AWG # 3/0 gauge copper.
For that distance I would run AWG # 3 copper and install a sub-panel.