I need to order cable for limit switches (3 core for Proxy) and then 4 core for the Spindle / Earth.

Do I need either of these cables to be shielded? 3 Core cable is common, shielding adds a fair bit to the price. I dont mind paying if its absolutely needed however no point if its just a 'nice to have'.

Any suggestions for cable for the 4KW type Chinese spindles?

Thanks