I am running rock lights along the side of the van and rear. Probably 8 lights total at 9 watts a piece. This puts me at 6 amps I think. I'm using the BlueSea wire calculator. My questions is about the length. I'll come off the Aux battery under the hood thru an inline fuse, in the dash, to a switch, and back out. Then I'll grab a negative from the battery creating a switched and fused power source. I'll split that into a driver and passenger side run. When determining wire size, the initial part will carry full load and then it will be split. Do I calculate the first (short part) based on all the lights, and then each "string" off of it based on their individual length and the number of lights? I'm a bit confused.
My current plan is 14 ga to the switch and the long run with more lights and 16ga to the one with less lights.
My current plan is 14 ga to the switch and the long run with more lights and 16ga to the one with less lights.
Last edited: