Giant 20' x 3' x 2' router build

[charlieuk]

I'm looking for some advise on we're to put all the electrics. My work space is generally quite dusty so I obviously need to protect against that. I also have the issue that all the cables will be fairly long by the time they make it any where. It's aprox 5meters from the centre of the machine and start of cable Chain to the spindle or about 8 if you take the cables to one end of the table. I have a metal cupboard I have been wondering about utilising to house some of the stuff to protect from dust but just not to sure how far I need to go with it, do I need a clean air source from out side? I was thinking of having the actual computer in a separate room to avoid dust but not sure if this would be practical? If any one can give any suggestions that would be great as I'm sure there is more to it than first meets the eye and as it's my first machine I'm not sure how closely things need to be together. Many thanks