I am in the process of adding a subpanel because my main box is full. By design, I will have the garage and basement running from the subpanel.
I would like to run 100amp service to my subpanel. I have 200amp service to the house. I will have a 50amp circuit for my welder, 30 amp for garage, and whatever else for the basement. I have the subpanel mounted and a 100amp breaker to install in the main box.
My questions are this (any help would be appreciated):
1) What gauge will I need to run from my main box to my subpanel to support 100amp?
2) Will this cable need to be in conduit for this run between boxes?
Here is what my arrangement looks like: