This size service can be wired in a few combinations. Two parallel runs of 1250 MCM, three parallel runs of 600 MCM, four parallel runs of 350 MCM. Of the three choices the four runs of 350 MCM wires would be the easiest to handle if there are any bends in the service entrance conduit.
A ground fault breaker does not operate from a ground wire. The ground fault breaker operates from current Transformers that monitor the current flowing through the breaker. If the current becomes sufficiently high (depending on what the breakers trip point is set at) the CT's current will trip the breaker open. A CT's current output is from 0 to 5 amps.
For Service Entrance Cable 600 kcmill (Thousands of circular mils).
As a service entrance wire you need AWG # 3/0 gauge copper.
#6 bare copper wire.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.
2 copper
To answer this question more information is needed. The wire size of the extention cord is needed.
For Service Entrance Cable 600 kcmill (Thousands of circular mils).
As a service entrance wire you need AWG # 3/0 gauge copper.
#6 bare copper wire.
200 amp service in chicago uses 3 aught.
It depends on the length of the run
To calculate the wire size, a system voltage is needed.
This is a voltage drop question. To receive an answer to this question the voltage of the service must be stated.
You need to say whether it's a 150 amp service or a 1200 amp service it has to be one or the other. <<>> A 1/0 copper conductor with an insulation factor of 90 degrees C is rated at 155 amps. There is no ground wire stated for a 150 amp service so the next size up is a 200 amp service. The ground wire for this size is #6 bare AWG. Without knowing what types of loads that are coming off of the distribution a reduced neutral can not be recommended. The neutral will be the same size as the service conductor which is 1/0.
From the question it is hard to establish whether the service size is 350 amps or the service conductors are 350 MCM in parallel. If the service is 350 amps, the grounding conductor is #3 bare copper wire. Parallel 350 MCM conductors will allow for a 600 amp service. The grounding conductor for a 600 amp service is a #1 bare copper wire.
4 sets of 750 mcm aluminum. Or four parallel runs of 600 MCM copper.
A 100 amp residential service requires a size #8 copper wire, it should be insulated in green.