Which thickness CY cable do I need for 1.5kW spindle?

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Lee, what works is not the same as what is safe and what is recommended.

https://en.wikipedia.org/wiki/Electr...United_Kingdom



That is a more realistic and better data, even if you step down one size, 1.5mm2 is what should be used. 0.75mm2 is for small desk lamps, not for motors. Then again, I know most people never really use their spindles at maximum load, so it is never really going to be a problem and in many cases even 0.5mm2 might be OK, but I think 1.5mm2 is the minimum if you want to play it safe. My 1.5kW is rated 8A and I am pretty convinced that saving on cable costs is not a good decision. Also, if you ever decide to use a vector controlled spindle you will notice that it pulls more current as well, so what is the point of under dimensioning the cable?