Wire Size and Type

All the consideration needed is contained within British Standard 7671.

Thanks, that's just what I needed to know. I appreciate the response.

Good morning,

Refer to NEC Section 350.15 for conductor size and ampacity ratings.

Pay careful attention to the different ampacity rating for different types of conductor insulation, stranded or solid configuration, copper or aluminum, number/quantity of conductors and whether the conductors are in a cable, raceway, or free air.

Example:

On the primary power side the nominal size for copper at 30 amps would be size 10AWG. (Depending on insulation type chosen)

On the secondary power side the nominal size for copper at 300 amps would be 300 kcmil. (Depending on insulation type chosen)

Also: Depending on the rectifier configuration and controls, be careful that whatever you connect the primary source to is not sensitive to noise impingement. If the rectifier does not have proper harmonic frequency and other generated noise filtering capability, the signals induced/injected back into your primary power circuit can cause severe disruption and/or damage to any digital or solid state controls equipment connected to that power supply.

Thanks, good info.