This is going to sound rich coming from ME but come on Lads don't turn it into an argument and pyshics lesson so to confuse the Man.

Bush Flyer 1.0mm/2 is fine for these Spindles and what I've fitted many times without any issues even on heavy use machines but if you want to cross I's & Dot the T's then use 1.5mm/2.

2.5mm/2 for the VFD Input. If near heavy traffic or chance of damage etc then armoured if not then just use 2.5 Flex not ridged mains cable.