12 x 1.75 = 21cu for the conductors. I believe 6 caps will be another 6x1.75=10.5 , meaning you would need 31.5. That is based on my location, I suspect you may have to subject even more volume per wire? How did you come up with 29.25 ?
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
DIY Home Improvement Forum
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!