This is a voltage drop question. To answer this question a voltage must be stated.
The amps that a four gauge wire will handle will depend with the thickness of the wire. If the wire is thin, the four gauge will handle 95 amps.
34.539 miliamps is only 0.034539 amps. A 16 gauge wire will handle that.
The recommended wire gauge for carrying 80 amps of current is typically 6 AWG (American Wire Gauge).
A #14 wire will do the job.
An 18 gauge wire can typically handle around 16 amps of electrical current.
An 18 gauge wire can typically handle around 16 amps of electrical current.
A 14 gauge wire can typically handle up to 15 amps of electrical current.
140 AMPS
10 gauge
At the service entrance you will need AWG 1/0 gauge.
You need a 3 conductor #10 cable. A #10 wire is rated at 30 amps.
As a service entrance wire you need AWG # 3/0 gauge copper.