Wire size is based on the amperage of the connected load. Without that amperage an answer can not be given.
6
The wire size depends on the amperage, not the voltage. The fact that the welder runs on 440 volts does not affect the wire size! You need to ask this question instead: What size wire do you need for a three phase welder on an eight foot run if the nameplate amps are 45A?
Use AWG #6 wire.
You will need to use #8 wire.
Service entrance wire should be AWG #3 copper.
Need to know the voltage of the mixer.
You need to look at the regulations that apply in your country. If in doubt, use a neutral wire of the same size as the live wire or wires.
10-32 unf-2a <<>> The wire size does not need to be calculated. Use a wire terminal end that crimps to the wire. These terminal end come in various wire sizes and bolt hole sizes. Pick the correct end for the wire size you are using and then in that wire size range, pick the correct bolt hole size that fits the bolt.
Number 10 thnn copper wire.
6 AWG.
8 AWG.
Need to know the wire size.