To keep costs down, by special permission in the electrical code, for home wiring on a 120/240 volt system 2/0 is allowed. For any other type 200 amp service 3/0 that has a insulation factor of 75 or 90 degrees C is rate at 200 and 225 amps respectively.
It's not the volts that you consider it is the amperage.
30 amps = #10
40 amps = # 8
55 amps = # 6
100 amps = # 3
200 amps = # 3/0
14 gauge copper
#4 copper.
The wire size depends on how much current it will conduct.
The size of conductor needed will be a #14. It should be copper and have an insulation factor of 90 degrees C. The fact that it is a three phase load does not enter into the calculation of the wire size.
As with any electrical installation, the wire size used depends on the expected maximum current the wire will carry. That cannot be determined by voltage alone.
A 1/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 30 amps for 500 feet on a 240 volt system.
Wire size is governed by amperage not voltage. Voltage is an insulation factor when talking about wire. Add up the amperage of fixtures you want in the circuit. Once that is found then the size of the wire can be calculated.
The wire size depends on how much current it will conduct.
AWG # 10 wire on 30 amp circuit.
you must run the proper size wire based on the ampacity needed, wire must have four conductors including the gound
If it is a 110 volt light it can safely run on a 20 amp circuit with AWG # 12 wire.
I would use AWG # 4 copper.
The size of conductor needed will be a #14. It should be copper and have an insulation factor of 90 degrees C. The fact that it is a three phase load does not enter into the calculation of the wire size.
8 gauge will be sufficient with less than a half volt drop
Use 8 gauge wire.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
To calculate the wire size, a system voltage is needed.
# 3 gauge
4 copper