I was given a drawing for this new job and it shows 9 'heating coils' around the commercial unit. They are all 600v 3 phase and most are 2kw and a few 4kw. The drawing shows the main breaker as a 40A 3P. So I was thinking of running #8s to a centralized location and then tapping this location with #14 or #12 BX to each heating coil. I've never installed heating like this before. What do you guys think?