When installing my mill in the shop, I moved the control box from the back of the mill to the wall. It was a huge space saver! The conduit and wire lengths were not ideal, but I got it done. It's been a while and I am ready to upgrade the controller in the mill. While I am at it, I thought I would rewire the whole thing and redo all the conduit as well. Should I go with the various plastic solutions or go with metal?

What is the best kind of conduit/cable protector for the external wiring on a milling machine and where do I get some?

What is the best multi lead wire (3-12) for a rewire and where to get that as well?

Thank you!