2 AWG.
A rather thin copper or aluminum wire.
3/0 gauge
Use 8 gauge wire.
A 12 gauge wire can support a load of approximately 2200 watts.
Wire is sized by the amperage of the load. Without knowing what the load amperage,the voltage and whether the load is three phase or single phaseat the dock, an answer can not be given.
The National Electrical Code calls for #4 copper or #2 aluminum.
The lower gauge number is always a thicker wire which can carry more current.
A rather thin copper or aluminum wire.
A 100 gauge piece of aluminum has a thickness of 0.0010 inches. Gauge is a universal system used to measure the thickness of metal and wire.
it is not recommended because the 14 gauge wire is not capable of carrying the same amount of load as the 12 gauge wire which could result in a fire.
8 gauge will be sufficient with less than a half volt drop
6 gauge
70 amps.
3/0 gauge
Awg #6
Use 8 gauge wire.
Loaded question, what is the voltage, run length, aluminum or copper feeders, expected constant load? Definitely bigger than 4/0