2.5 squre mm
The frequency has no direct relationship to the size of wire. Wire is sized as to the amount of current a load draws in a circuit.
For a 30 amp circuit, a wire size of at least 10 gauge should be used to safely handle the electrical load.
For a 50 amp breaker, a wire size of at least 6 AWG (American Wire Gauge) should be used to safely handle the electrical load.
For a 50 amp breaker, a wire size of at least 6 AWG (American Wire Gauge) should be used to safely handle the electrical load.
For a 50 amp RV service, a wire size of 6 AWG should be used to safely handle the electrical load.
For a 30 amp RV service, a wire size of at least 10 gauge should be used to safely handle the electrical load.
For a stove installation, a wire size of 8-gauge or larger is typically recommended to handle the high electrical load of the stove.
For a dryer installation, a 10-gauge wire is typically recommended to handle the electrical load safely and efficiently.
The wire size is large enough to carry the load current and that the cord is properly voltage rated.
It is not a recommended practice. The secondary side of the transformer should go to a distribution panel where breakers can be used to protect the different wire sizes and load currents.
The calculations are worked backwards from the amps used by the load of the circuit. This will be used to select the correct size of the wire. Some stipulations are added depending of the ambient temperature, length from the supply or if the load is a motor. Fusing is then dependant on the wire size that is used.
Wire size is based on the amperage of the load. Without knowing what the motors's full load amperage is, an answer can not be given.