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Thanks for all the good tips. I have obtained the NFPA 79 which will be should be of help. In my case I typically have anywhere from 2 to 4 dc power supplies and 2 to 4 different AC voltages in one panel. All derived from a single 480 vac 3ph main coming through a disconnect and...

Thanks for the pointers I have been going through the sites looking up info.

I'm looking for information on wire color codes for control panels. Normally I use wire colors as an "additional" identifier for functions. Are there any rules (codes) which apply to using various wire colors in a panel. Normally DC in the US is Blue with White/blue stripe, Europe...