I have a challenging service upgrade. The FPE panel has been subfed from twice. There are also at least 6 branch circuits that will not have enough cable to reach the new panel. Typically there are a couple of branch circuits that will not reach the new panel and I set a couple of 4X4's to accomodate the short cables.

I am considering a gutter. I know that I am limited to the number of conductors before I have to derate - that's not a problem.

Your thoughts or ideas? Thanks, Takideezy