Distribution panel

[Leonardoto]

Good afternoon to all.
i have a 1600 amp main disconnect feeding 2 800 amp panels to which I’ve got to run 2 sets of 3 600 kcmil to each one , cannot come from the top because there’s no space so I figured I use a through coming from the side of the main dp. Now what will be the correct size of the through
I uploaded a sketch of the plan any suggestions will be appreciated.
thanks.

 

[jumper]

376.22 Number of Conductors and Ampacity. The number
of conductors and their ampacity shall comply with
376.22(A) and (B).

(A) Cross-Sectional Areas of Wireway. The sum of the
cross-sectional areas of all contained conductors at any
cross section of a wireway shall not exceed 20 percent of
the interior cross-sectional area of the wireway.

(B) Adjustment Factors. The adjustment factors in
310.15(B)(3)(a) shall be applied only where the number of
current-carrying conductors, including neutral conductors
classified as current-carrying under the provisions of
310.15(B)(5), exceeds 30 at any cross section of the wireway.
Conductors for signaling circuits or controller conductors between
a motor and its starter and used only for starting duty
shall not be considered as current-carrying conductors.

 

[jumper]

Good afternoon to all.
i have a 1600 amp main disconnect feeding 2 800 amp panels to which I’ve got to run 2 sets of 3 600 kcmil to each one

Six 600 kcmil per 800A panel?:?