D7 and L7 Power

I have x2 D7 and x3L7 on the way, i am preparing the power for those but find it hard to calculate as each of them has 2 c13/c14 cords, i believe the 4125w of the L7 is divided into 2 right? Plus i am planing to cut the c14 15amp 14AWG and connect an industrial plug, will that work ?